CN212277149U - Electron microscope in-situ sample rod with high-resolution multi-dimensional manipulation and electrical measurement - Google Patents
Electron microscope in-situ sample rod with high-resolution multi-dimensional manipulation and electrical measurement Download PDFInfo
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- CN212277149U CN212277149U CN202020944865.4U CN202020944865U CN212277149U CN 212277149 U CN212277149 U CN 212277149U CN 202020944865 U CN202020944865 U CN 202020944865U CN 212277149 U CN212277149 U CN 212277149U
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Abstract
The utility model discloses an electron microscope in-situ sample rod with high resolution multidimensional operation and electrical measurement, wherein a rod head body comprises a micro-operation structure and a probe, the operation structure comprises a deformation mechanism, a telescopic mechanism and an inertia sensing mechanism which is arranged into a spherical gravity block structure, and the deformation mechanism is connected with the probe through the telescopic mechanism; each pair of piezoelectric ceramic patches of the piezoelectric ceramic patch group of the deformation mechanism are symmetrically and fixedly attached to the side wall of the base, and the bottom of the base is provided with piezoelectric ceramic patches; the sliding block b and the gasket of the telescopic mechanism synchronously slide relatively along the axial direction of the sliding block a. Besides physical property measurement of the designated position, the device can also be used as a three-dimensional nanometer manipulator to realize accurate operations such as in-situ welding of two nanowires, in-situ compression of an experimental sample, in-situ preparation of a heterojunction and the like in a TEM. The overall structural design can realize the improvement of the controlled resolution and is beneficial to prolonging the service life of the equipment.
Description
Technical Field
The utility model belongs to the technical field of the nano-material is measured, a electron microscope accessory and nano-material normal position measurement research field are related to, concretely relates to possesses high-resolution multidimension manipulation and electricity measuring electron microscope normal position sample pole.
Background
Modern electron microscopes can magnify samples by millions of times, and observe the samples on a nanometer scale or even a picometer scale, which is an indispensable scientific instrument in modern times. The introduction of an external field is one of the trends of the development of the future electron microscope, for example, a thermal field, an electric field, a magnetic field, a force field, an optical field, an electrochemical field and the like are applied to a sample, and the sample is observed in situ, so that the introduction of the external field has important guiding significance for developing the research on the structure-performance relationship of the material. With the development of electron microscopy, it is no longer sufficient to observe only a sample, but rather to simultaneously observe the sample under the influence of various external fields, and in-situ electron microscopy techniques have been derived.
In-situ electron microscope technology, a sample rod in a transmission electron microscope or a sample stage in a scanning electron microscope is generally modified and an in-situ module is integrated, so that various external fields such as heat, light, force, electricity and the like can be applied to a sample. Modern in situ electron microscopes are generally based on two techniques: (1) MEMS chip technology; (2) scanning probe technology. MEMS chip technology is commonly used to create various environments within an electron microscope, including high temperature environments, liquid environments, gaseous environments, and the like. Scanning probe techniques are commonly used for mechanical manipulation and physical property measurements of samples in transmission electron microscopy. Since electron microscopes are typically imaging devices on the nanometer and picometer scale, in-situ manipulation accuracy must also be of this order to be meaningful, which is often not achieved with conventional motor structures. The utility model 'CN 200410070112.0 original position micro-area structure analysis and property test combined system' provides an original position transmission electron microscope micro-area control and physical property measurement system which is made by utilizing the electrostrictive property of a piezoelectric ceramic tube. However, after the development of more than ten years, the magnification factor and the resolution of the electron microscope are higher and higher, and the control resolution of the scheme of converting the extension deformation quantity into the displacement by simply depending on the piezoelectric ceramic is limited, so that the use requirement of the high-resolution electron microscope cannot be met. Therefore, how to develop an in-situ sample rod which can realize high-resolution multidimensional manipulation and electrical measurement in an electron microscope based on an inertial sensing mode has important practical significance.
SUMMERY OF THE UTILITY MODEL
Control the resolution ratio to the electron microscope that exists among the prior art limited, can't satisfy high-resolution electron microscope's user demand's technical problem, the utility model aims to provide an electron microscope normal position sample pole that possesses high-resolution multidimension and control and electricity and measure.
The utility model discloses the technical scheme who takes does:
the electron microscope in-situ sample rod is provided with high-resolution multidimensional operation and electrical measurement, the end part of the sample rod is provided with a rod head body, the rod head body comprises a micro-operation structure and a probe, the operation structure is provided with a deformation mechanism and a telescopic mechanism, and the deformation mechanism is connected with the probe through the telescopic mechanism;
the deformation mechanism comprises a piezoelectric ceramic piece group and a base, wherein the piezoelectric ceramic piece group is provided with a plurality of piezoelectric ceramic pastes which are arranged in pairs in an opposite mode, each pair of piezoelectric ceramic pastes are symmetrically and fixedly pasted on the side wall of the base, and the bottom of the base is provided with a piezoelectric ceramic piece;
the telescopic mechanism comprises a sliding block a and a sliding block b, wherein the inner wall of the sliding block b is firmly connected with a gasket, the sliding block a and the sliding block b are electrically connected, the sliding block b is sleeved on the outer side wall of the sliding block a through the gasket in a relative mode, and the sliding block b and the gasket synchronously slide relatively along the axis direction of the sliding block a.
Furthermore, a high-frequency periodic signal is applied to the piezoelectric ceramic sheet group, and the continuous and high-resolution displacement of the probe in the z direction is controlled by controlling the rising/falling time and the signal period of the signal.
Furthermore, when no voltage is applied to the piezoelectric ceramic chip, the cylinder substrate keeps a natural non-stretching state; when a slowly rising voltage is applied to the piezoelectric ceramic chip, the cylindrical substrate, the telescopic mechanism and the front end structure integrally extend forwards; when a rapidly-reduced voltage is applied to the piezoelectric ceramic sheet, the cylindrical substrate and the sliding block a of the telescopic mechanism contract backwards, the sliding block b of the telescopic mechanism and the front end connecting structure keep in situ due to inertia, and the cylindrical substrate and the sliding block a of the telescopic mechanism displace forwards for a certain distance; and conversely, controlling the negative direction displacement of the Z direction.
Furthermore, a voltage signal is applied to the piezoelectric ceramic sheet group in the deformation mechanism, the piezoelectric ceramic sheet group is controlled to respectively correspond to the operation of the dimensions in the +/-x and +/-y directions, and the operation dimension is controlled by increasing the number of the piezoelectric ceramic sheet groups.
Furthermore, the piezoelectric ceramic sheet group is provided with four piezoelectric ceramic pastes which are arranged in pairs in an opposite mode, no voltage is applied to the piezoelectric ceramic sheet group, and the whole deformation mechanism does not deform; positive voltage is respectively applied to the piezoelectric ceramic piece groups, and the whole deformation mechanism is shortened; negative voltage is respectively applied to the piezoelectric ceramic sheet groups, and the deformation mechanism extends integrally; positive voltage and negative voltage are respectively applied to the symmetrical piezoelectric ceramic sheets in the x (or y, -x and y) direction, no voltage is applied to the symmetrical piezoelectric ceramic sheets in the y (or x, -y and x) direction corresponding to the positive voltage and the negative voltage, and the whole deformation mechanism corresponding to the negative voltage bends at an angle towards the-x (or-y, x and y) direction.
Furthermore, an inertia sensing mechanism is arranged between the telescopic mechanism and the probe, the inertia sensing mechanism is arranged to be a spherical gravity block structure, and the spherical gravity block is firmly connected to the outer end part of the sliding block.
Furthermore, inertia sensing mechanism has set gradually copper cap, metal claw and gravity ball, and the probe links to each other with the copper cap through dismantled and assembled mode, firmly glues on the copper cap and is equipped with a plurality of metal claws, and the metal claw presss from both sides and establishes on the lateral wall of gravity ball.
Furthermore, the gravity ball is made of a conductive material to form a smooth spherical structure, and is set to be a gem ball.
Furthermore, the probe and the copper cap are screwed, adhered or welded by using a screw group.
Furthermore, the slide block a is transversely penetrated and embedded in the substrate base and firmly connected with the inner wall of the substrate base, and the tail end of the slide block a is electrically connected with the bottom piezoelectric ceramic piece of the substrate base.
Furthermore, the substrate base is made of a non-conductive material to form a hollow cylinder structure.
Furthermore, the sliding block a and the sliding block b are both prepared by adopting conductive ceramic rods, and the sliding block a is arranged to be of a cylindrical rod-shaped structure; the sliding block b is of a hollow cylinder structure which is matched with the sliding block a and has an opening at one end.
Further, the probe is set as a conductive metal probe, and the tip of the probe is made into a tip structure with a nano-scale curvature by means of electrochemical corrosion or FIB technology cutting, and the sample is contacted and manipulated through the tip structure.
Furthermore, the piezoelectric ceramic chip group is electrically connected with the microcontroller, one end of the microcontroller is integrally set to be a conductive structure and is connected with one end of the external controller through a wire, the probe is in contact with a sample through micro control to form a closed loop, and an electrical signal is applied to or measured by the external controller on the sample.
Furthermore, the outer side of the club head body is provided with an outer frame and is installed at the end part of the sample rod through the outer frame, the outer frame and the probe of the club head body are correspondingly provided with a sample loading area, a circuit structure is printed on the outer frame, one end of the circuit structure is electrically connected with the sample area, and the other end of the circuit structure penetrates through the sample rod body through a lead and is connected with an external electrical controller.
Furthermore, one end of the microcontroller is integrally of a conductive structure and is connected with one end of an external electrical controller through a wire. When the probe contacts the sample by micromanipulation, a closed loop is formed, through an external electrical controller to apply or measure an electrical signal to the sample. Meanwhile, the micro-manipulation structure can be used for implementing mechanical manipulation of multiple dimensions on the sample through three-dimensional or multi-dimensional displacement manipulation.
The utility model has the advantages that:
(1) in electron microscopy, measuring electrical signals or mechanical responses from a given section of a sample requires a high resolution three-dimensional manipulated probe to precisely touch the sample at a given location while applying electrical signals or mechanical stimuli. Along with the development of electron microscope technology, electron microscope resolution also is higher and higher, and the resolution ratio that can realize controlling through the overall structure design of this scheme improves, therefore just can satisfy new electron microscope technical requirement.
(2) The scheme can be used as a three-dimensional nanometer manipulator for measuring physical properties of a specified position, and can realize accurate operations such as in-situ welding of two nanowires, in-situ compression of an experimental sample, in-situ preparation of a heterojunction and the like in a TEM.
(3) Piezoelectric positioning devices conventionally used in electron microscopes require the application of a sustained and stable voltage when required to extend or contract in a given direction. The scheme utilizes the inertia after the action of the piezoelectric ceramics, only needs to apply an electric signal of one period, does not need to apply continuously, and is beneficial to prolonging the service life of equipment.
(4) The conventional approach has extremely high requirements on the resolution of the applied electrical signal and also on the quality of the material, since the electrical signal directly corresponds to the amount of displacement. The resolution of the displacement in the scheme mainly depends on the frequency of the alternating current applied to the piezoelectric ceramic, and the current frequency can easily reach hundreds of kHZ (kilohertz) and even higher in the prior art, so that the resolution of the scheme is higher, and the requirement on the quality of the piezoelectric material is relatively lower.
(5) The structure design of this scheme has creatively adopted the little structure of controlling that deformation mechanism, telescopic machanism and inertia sensing mechanism constitute, specifically is exactly the three-dimensional combination of claw, ball, slider, combines the excitation shake of the signal of telecommunication to a plurality of dimensions of piezoceramics, and the displacement of accurate realization XYZ direction.
Drawings
Fig. 1 is a schematic view of the overall structure of the middle club head body of the present invention.
Fig. 2 is the deformation schematic diagram of the piezoelectric ceramic tube of the middle deformation mechanism of the present invention.
Fig. 3 is a schematic view of the middle club head body of the present invention operating along the Z direction.
Fig. 4 is a schematic view of the middle club head body of the present invention operating along the XY direction.
Fig. 5 is a schematic structural diagram of the middle micro-manipulation structure of the present invention integrated into the end of the sample rod of the transmission electron microscope.
Fig. 6 is a schematic view of the complete system design composed of the middle club head body and the sample club of the present invention.
Wherein, 1, the piezoelectric ceramic sheet group; 2. piezoelectric ceramic plates; 3. a slide block a; 4. a gasket; 5. a slide block b; 6. a gravity ball; 7. a metal claw; 8. a copper cap; 9. a probe; 10. a base pedestal; 11. a sample rod; 12. a sample area; 13. an outer frame; 14. an external electrical controller; 15. a microcontroller.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the utility model discloses an in-situ micro-area manipulation and physical property measurement scheme based on piezoelectric ceramics and an inertia sensing mode for a modern high-resolution electron microscope.
The electron microscope in-situ sample rod 11 is provided with high-resolution multidimensional manipulation and electrical measurement, the end part of the sample rod 11 is provided with a rod head body, the rod head body comprises a micro-manipulation structure and a probe 9, the manipulation structure is provided with a deformation mechanism and a telescopic mechanism, and the deformation mechanism is connected with the probe 9 through the telescopic mechanism;
the deformation mechanism comprises a piezoelectric ceramic sheet group 1 and a substrate base 10, wherein the substrate base 10 is made of a non-conductive material to form a hollow cylindrical structure, and the cylindrical body has the characteristics of being hollow, non-conductive, suitable for toughness and the like; the piezoelectric ceramic plate 2 is firmly attached to the bottom surface of the cylindrical substrate base 10.
The piezoelectric ceramic piece group 1 is provided with a plurality of piezoelectric ceramic pastes which are arranged oppositely in pairs, the piezoelectric ceramic pastes are arranged into four pieces, the four piezoelectric ceramic pastes are opposite in pairs and symmetrically and firmly pasted on the side wall of the base 10, and the bottom of the base 10 is provided with a piezoelectric ceramic piece 2;
the telescopic mechanism comprises a sliding block a3 (hereinafter, the same is: a conductive ceramic rod a) and a sliding block b5 (hereinafter, the same is: a conductive ceramic rod b), wherein the sliding block a3 and the sliding block b5 are both prepared from conductive ceramic rods, and the conductive ceramic rods a are respectively arranged into cylindrical rod-shaped structures.
The conductive ceramic rod a is transversely inserted into the whole column of the substrate base 10 and firmly connected with the inner wall of the substrate base 10, and meanwhile, the tail end of the conductive ceramic rod a is electrically connected with the piezoelectric ceramic piece 2 at the bottom of the substrate base 10 and firmly electrically contacted with the piezoelectric ceramic piece.
The conductive ceramic rod b is arranged to be of a hollow cylindrical barrel structure with one end matched with the conductive ceramic rod a and with an opening, the inner wall of the conductive ceramic rod b is firmly connected with a group of gaskets 4 (the number of the gaskets 4 is four), the gaskets 4 are electrically contacted with the conductive ceramic rod b, the conductive ceramic rod b is sleeved on the outer side wall of the conductive ceramic rod a through the gaskets 4 in a relative mode, and the conductive ceramic rod b and the gaskets 4 synchronously slide relative to each other along the axial direction of the conductive ceramic rod a.
Example 2
As shown in fig. 1, on the basis of example 1, different from example 1, as shown in fig. 1, 5 and 6, an electron microscope in-situ sample rod 11 with high resolution multidimensional manipulation and electrical measurement is provided, a rod head body is arranged at an end of the sample rod 11, the rod head body comprises a micro-manipulation structure and a probe 9, the manipulation structure is provided with a deformation mechanism, a telescopic mechanism and an inertia sensing mechanism, and the deformation mechanism is connected with the probe 9 through the telescopic mechanism;
the inertia sensing mechanism is arranged into a spherical gravity block structure, and the spherical gravity block is firmly connected to the outer end part of the sliding block.
Inertia sensing mechanism has set gradually copper cap 8, metal claw 7 and gravity ball 6, probe 9 links to each other with copper cap 8 through dismantled and assembled mode, firmly glue on copper cap 8 and be equipped with a plurality of metal claws 7 (metal claw 7 sets up to 4), the end of metal claw 7 is provided with the arc structure of certain bending curvature, press from both sides and establish on the lateral wall of gravity ball 6, metal claw 7 presss from both sides and has suitable roughness between the gravity ball 6, when simple to operate between the two, guarantee probe 9's high accuracy, in order to realize applying the mechanical manipulation of a plurality of dimensions to the sample.
The gravity ball 6 is made of a conductive material to form a smooth spherical structure, and the gravity ball 6 is a gem ball which has the characteristics of conductivity and smoothness.
The probe 9 and the copper cap 8 are screwed down by a screw group, and are adhered tightly by conductive adhesive or welded, so that the probe is convenient to disassemble, assemble and maintain.
The probe 9 is set as a conductive metal probe 9, and the tip of the probe 9 is made into a tip structure with a nano-scale curvature by means of electrochemical corrosion or FIB technology cutting, and the tip structure is used for contacting and manipulating a sample.
The piezoelectric ceramic chip set 1 is electrically connected with the microcontroller 15, and a high-frequency periodic signal is applied to the piezoelectric ceramic chip set 1 through the microcontroller 15.
Example 3
On the basis of the embodiment 1 or 2, different from the embodiment 1 or 2, as shown in fig. 1, 5 and 6, the electron microscope in-situ sample rod 11 with high resolution multi-dimensional manipulation and electrical measurement is provided, the outer side of the rod head body is provided with an outer frame 13 and is installed at the end of the sample rod 11 through the outer frame 13, the outer frame 13 and the probe 9 of the rod head body are correspondingly provided with sample loading areas, as shown in fig. 5, the sample loading areas are right opposite to the micro-manipulation structure, and the sample loading areas can be conductive pins or semi-copper net structures, which depends on whether the selected sample is a nano wire, a nano particle or a block material or a thin film. The outer frame 13 is printed with a circuit structure, one end of the circuit is electrically connected with the sample area 12, and the other end of the circuit passes through the sample rod 11 body through a lead wire and is connected with an external electrical controller 14. One end of the microcontroller 15 is integrally of a conductive structure and is connected with one end of the external controller through a lead. When the probe 9 contacts the sample by micromanipulation, a closed loop is formed, and an electrical signal can be applied or measured to the sample by the external controller. Meanwhile, the micro-manipulation structure can realize mechanical manipulation of applying multiple dimensions to the sample through three-dimensional or multi-dimensional displacement manipulation.
As shown in fig. 6, the electrical controller is used to perform electrical measurement of physical properties of the sample or apply electrical signals. The microcontroller 15 can apply a high-frequency periodic signal to the piezoelectric ceramic chip set 1 to realize the multi-dimensional and high-resolution operation of the probe 9.
When it is desired to extend or contract in a given direction, a sustained and stable voltage is applied. The scheme utilizes the inertia after the action of the piezoelectric ceramics, regulates and controls the frequency of the alternating current applied to the piezoelectric ceramics through the microcontroller 15 and the external electrical controller 14, only needs to apply a periodic electric signal, does not need to apply the electric signal continuously, controls the telescopic mechanism (sliding block) or the inertia sensing mechanism (metal claw 7 or copper claw) of the structure and the like to be 'thrown' away, and realizes the displacement towards one direction.
Example 4
On the basis of examples 1, 2 or 3, unlike examples 1, 2 or 3,
as shown in fig. 2, the structure composed of the piezoelectric ceramic sheet group 1, the piezoelectric ceramic sheet 2 and the cylindrical substrate base 10 can realize the operations of extension, shortening and x or y direction bending. In this case, the piezoelectric ceramic pieces 2 are grounded, the piezoelectric ceramic piece groups 1 correspond to ± x and ± y directions respectively, the case is only three-dimensional operation, and if more-dimensional operation is required, the operation dimension can be increased by increasing the number of the piezoelectric ceramic piece groups 1 on the side surface of the cylindrical substrate base 10. (a) At this time, no voltage is applied to the four piezoelectric ceramic sheet groups 1 on the side of the cylindrical substrate base 10, so that the structure is not deformed as a whole. (b) At this time, a negative voltage is applied to each of the piezoelectric ceramic sheet groups 1 on the side surfaces, and the entire structure is elongated. (c) At this time, positive voltages are applied to the piezoelectric ceramic sheet groups 1 on the side surfaces, respectively, and the entire structure is shortened. (d) At the moment, positive voltage and negative voltage are respectively applied to the two symmetrical piezoelectric ceramic pieces 2 in the x direction, no voltage is applied to the two symmetrical piezoelectric ceramic pieces 2 in the y direction, and the structure is integrally bent to the-x direction by an angle.
Similarly, a positive voltage and a negative voltage are respectively applied to the two symmetrical piezoelectric ceramic pieces 2 in the y direction, no voltage is applied to the two symmetrical piezoelectric ceramic pieces 2 in the x direction, and the structure is bent at an angle in the-y direction.
Positive voltage and negative voltage are respectively applied to the two symmetrical piezoelectric ceramic plates 2 in the x direction, no voltage is applied to the two symmetrical piezoelectric ceramic plates 2 in the y direction, and the structure is bent to an angle towards the x direction integrally.
Positive voltage and negative voltage are respectively applied to the two symmetrical piezoelectric ceramic plates 2 in the y direction, no voltage is applied to the two symmetrical piezoelectric ceramic plates 2 in the x direction, and the structure is bent to form an angle towards the y direction integrally.
As shown in fig. 3(a), when no voltage is applied to the piezoelectric ceramic sheet 2, the cylinder base 10 is kept in a natural non-telescopic state. As shown in fig. 3(b), when a slightly rising voltage is applied to the piezoelectric ceramic plate 2, the entire cylinder base 10, together with the slider a3 (conductive ceramic rod a), the piezoelectric ceramic plate group 1, the slider b5 (conductive ceramic rod b), and the front end structure, is extended forward. As shown in fig. 3(c), immediately after a rapidly decreasing voltage is applied to the piezoelectric ceramic plate 2, the cylindrical base 10 together with the slider a3 (conductive ceramic rod a) contracts backward, and the piezoelectric ceramic plate group 1 and the front end connection structure of the slider b5 (conductive ceramic rod b) are held in place by inertia and displaced forward by a distance with respect to the cylindrical base 10 and slider a3 (conductive ceramic rod a) structures. Conversely, negative direction displacement in the Z direction can be achieved. By controlling the voltage rising/falling edge time and the signal period, the probe 9 can realize continuous and high-resolution displacement in the Z direction.
As shown in fig. 4(a), when no voltage is applied to the piezoelectric ceramic sheet 2, the cylinder base 10 is kept in a natural non-telescopic state. As shown in fig. 4(b), when a positive voltage and a negative voltage are applied to a pair of the piezoelectric ceramic plates 2 in the X direction on the piezoelectric ceramic plates 2, respectively, the cylinder base 10 is bent downward. As shown in fig. 4(c), when the voltage on the piezoelectric ceramic plate 2 in the X direction on the piezoelectric ceramic plate 2 is zero, the cylindrical substrate base 10, together with the slide block a3 (conductive ceramic rod a), the piezoelectric ceramic plate group 1, the slide block b5 (conductive ceramic rod b), and the jewel structure, is restored. At this time, due to inertia, the metal claw 7, the copper cap 8 and the probe 9 are not restored to the original state, and at this time, the probe 9 can be displaced by a certain distance in the X direction, and conversely, the probe can be displaced by a certain distance in the-X direction. By controlling the voltage period and the amplitude, the displacement with continuous and high resolution in the X direction can be realized. In the same way, continuous and high-resolution displacement in the Y direction or other dimension directions can be realized.
The above description is not a limitation of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various changes, modifications, additions and substitutions can be made without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The electron microscope in-situ sample rod with high-resolution multidimensional manipulation and electrical measurement is characterized in that the end part of the sample rod (11) is provided with a rod head body, the rod head body comprises a micro-manipulation structure and a probe (9), the manipulation structure is provided with a deformation mechanism and a telescopic mechanism, and the deformation mechanism is connected with the probe (9) through the telescopic mechanism;
the deformation mechanism comprises a piezoelectric ceramic sheet group (1) and a base seat (10), wherein the piezoelectric ceramic sheet group (1) is provided with a plurality of piezoelectric ceramic pastes which are arranged in pairs in an opposite mode, each pair of piezoelectric ceramic pastes are symmetrically and fixedly pasted on the side wall of the base seat (10), and the bottom of the base seat (10) is provided with a piezoelectric ceramic sheet (2); the telescopic mechanism comprises a sliding block a (3) and a sliding block b (5), wherein a gasket (4) is firmly connected and arranged on the inner wall of the sliding block b (5), the sliding block b (5) is electrically connected with the sliding block b (5), the sliding block b (5) is relatively sleeved on the outer side wall of the sliding block a (3) through the gasket (4), and the sliding block b (5) and the gasket (4) synchronously slide relatively along the axial direction of the sliding block a (3).
2. The in situ sample rod of electron microscope with high resolution multi-dimensional manipulation and electrical measurement according to claim 1, characterized in that the set of piezo ceramic plates (1) applies high frequency periodic signal to control the continuous and high resolution displacement of the probe (9) in z direction by controlling the signal rise/fall time and signal period.
3. The in-situ sample rod for the electron microscope with high-resolution multidimensional manipulation and electrical measurement according to claim 1 or 2, wherein when no voltage is applied to the piezoceramic sheet (2), the cylindrical substrate is kept in a natural non-stretching state; when a slowly rising voltage is applied to the piezoelectric ceramic piece (2), the cylindrical substrate, the telescopic mechanism and the front end structure integrally extend forwards; when a rapidly-reduced voltage is applied to the piezoelectric ceramic piece (2), the cylindrical substrate and the sliding block a (3) of the telescopic mechanism contract backwards, the sliding block b (5) of the telescopic mechanism and the front end connecting structure keep the original position due to inertia, and the piezoelectric ceramic piece moves forwards for a certain distance relative to the cylindrical substrate and the sliding block a (3) structure of the telescopic mechanism; and conversely, controlling the negative direction displacement of the Z direction.
4. The in-situ sample holder for electron microscope with high resolution multi-dimensional manipulation and electrical measurement as claimed in claim 1, wherein the piezoelectric ceramic sheet group (1) in the deformation mechanism applies voltage signals to control the manipulation of the piezoelectric ceramic sheet group (1) corresponding to ± x and ± y dimensions respectively, and the manipulation dimension is controlled by increasing the number of the piezoelectric ceramic sheet groups (1).
5. The electron microscope in-situ sample rod with high-resolution multi-dimensional manipulation and electrical measurement functions according to claim 1 or 4, wherein the piezoelectric ceramic sheet group (1) is provided with four piezoelectric ceramic patches which are arranged oppositely in pairs, no voltage is applied to the piezoelectric ceramic sheet group (1), and the whole deformation mechanism is not deformed; positive voltage is respectively applied to the piezoelectric ceramic piece groups (1), and the whole deformation mechanism is shortened; negative voltage is respectively applied to the piezoelectric ceramic sheet group (1), and the deformation mechanism extends integrally; positive voltage and negative voltage are respectively applied to the symmetrical piezoelectric ceramic plates (2) in the x or y, -x and-y directions, no voltage is applied to the corresponding symmetrical piezoelectric ceramic plates (2) in the y or x, -y and-x directions, and the whole deformation mechanism corresponding to the piezoelectric ceramic plates bends at an angle towards the-x or-y, x and y directions.
6. The electron microscope in-situ sample rod with high resolution multi-dimensional manipulation and electrical measurement of claim 1, wherein an inertial sensing mechanism is further disposed between the telescoping mechanism and the probe (9), the inertial sensing mechanism is configured as a spherical gravity block structure, and the spherical gravity block is firmly connected to the outer end of the sliding block.
7. The electron microscope in-situ sample rod with high-resolution multi-dimensional manipulation and electrical measurement functions according to claim 6, wherein the inertial sensing mechanism is sequentially provided with a copper cap (8), a metal claw (7) and a gravity ball (6), the probe (9) is detachably connected with the copper cap (8), the copper cap (8) is firmly adhered with the metal claws (7), and the metal claws (7) are clamped on the outer side wall of the gravity ball (6).
8. The electron microscope in-situ sample rod with high resolution multi-dimensional manipulation and electrical measurement according to claim 7, wherein the gravity ball (6) is made of a conductive material to form a smooth spherical structure, and the gravity ball (6) is configured as a gem ball.
9. The in-situ sample holder for the electron microscope with high resolution multi-dimensional manipulation and electrical measurement as claimed in claim 1, wherein the slide block a (3) is embedded in the base (10) in a transverse and penetrating manner and is firmly connected with the inner wall of the base (10), and the end of the slide block a (3) is electrically connected with the bottom piezoceramic plate (2) of the base (10).
10. The in-situ sample rod for the electron microscope with high resolution multi-dimensional manipulation and electrical measurement according to claim 1, wherein the piezoelectric ceramic plate group (1) is electrically connected with a microcontroller (15), one end of the microcontroller (15) is integrally set to be a conductive structure and is connected with one end of an external controller through a lead, and the probe (9) forms a closed loop after contacting the sample through the micro manipulation, and applies or measures an electrical signal to the sample through the external controller.
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