CN110018220A - A kind of preparation and test method of the metal cluster of chemical modification - Google Patents
A kind of preparation and test method of the metal cluster of chemical modification Download PDFInfo
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- CN110018220A CN110018220A CN201910191460.XA CN201910191460A CN110018220A CN 110018220 A CN110018220 A CN 110018220A CN 201910191460 A CN201910191460 A CN 201910191460A CN 110018220 A CN110018220 A CN 110018220A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
Abstract
The present invention relates to new material research and development technology fields, a kind of preparation and test method of the metal cluster of chemical modification, the measuring device of the metal cluster of chemical modification includes rotating base, cluster generator, specimen holder, sample, pulse valve I, air accumulator I, pulse valve II, air accumulator II, droplet ejection source, laser, quadrupole rod mass spectrum, ion trap, detector, vacuum chamber and computer, it can be used in generating the metal cluster of chemical modification under gas phase and be tested, the method for contactlessly driving specimen holder to rotate using magnetic rotating base, so that sample is heated evenly under laser during laser melts steaming, and using the air supply method of special carrier gas and reaction gas to avoid the generation of other products, and, metal cluster is cooled down using the superfluid helium droplet of low temperature, metal cluster is tied in subsequent measurement experiment Structure is more stable, and the size difference of the metal cluster of generation is smaller, and the probability for generating other products is lower.
Description
Technical field
It is especially a kind of for generating the metal of chemical modification under gas phase the present invention relates to new material research and development technology field
The preparation and test method of cluster and a kind of metal cluster for the chemical modification tested.
Background technique
The metal cluster as made of tens or several hundred a metallic atom aggregations is that one in current new material research is important
Aspect, can be applied to many technical fields, such as environmental protection, new energy, new material, pulse-laser deposition method is to prepare metal group
A kind of common method of cluster, and further chemical modification is carried out to metal cluster and generallys use reaction gas and metal cluster
The method of interaction is so that certain chemical groups in reaction gas are combined with metal cluster.Prior art defect be
During pulse-laser deposition forms metal cluster, since the heat that laser light incident to metal sample target surface generates can unevenly be led
Cause the size difference of the metal cluster generated larger, furthermore, in the process for needing to carry out metal cluster subsequent chemical modification
In, if during reaction gas has participated in pulse-laser deposition, will lead to and generate other products, in addition, passing through pulse-laser deposition
The internal temperature that method forms metal cluster is higher to be not sufficiently stable, and is easy to decompose during follow-up test, therefore need
Follow-up test, a kind of metal group of chemical modification are carried out again after wanting the carrier of external low temperature to carry out certain cooling to it
The preparation of cluster and test method are able to solve problem.
Summary of the invention
To solve the above-mentioned problems, the method for the present invention uses rotatable specimen holder, the metal-like when carrying out laser and melting steaming
Product are heated evenly under laser, and using the air supply method of special carrier gas and reaction gas, the generation for reducing other products is several
Rate, moreover, cooling to metal cluster using the superfluid helium droplet of low temperature.
The technical scheme adopted by the invention is that:
The measuring device of the metal cluster of chemical modification includes rotating base, cluster generator, specimen holder, sample, pulse
Valve I, air accumulator I, pulse valve II, air accumulator II, droplet ejection source, laser, quadrupole rod mass spectrum, ion trap, detector, vacuum
Chamber and computer, pulse valve I, pulse valve II and the equal cable connection computer of detector, can control pulse valve I by computer
With opening or closing for pulse valve II, cluster generator includes cavity, sample cavity, air inlet pipe I, tubule, air inlet pipe II, reaction
Chamber, ring electrode and heater, xy z are three-dimensional coordinate system, and ring electrode is circumscribed with voltage source, and heater is circumscribed with current source,
One end of cluster generator has rotating base, and the sample cavity, tubule and reaction chamber are sequentially connected and are respectively positioned in cavity, into
One end of tracheae I is connected to sample cavity, the other end is located at the outside of cavity and is connected to pulse valve I, and pulse valve I is connected by tracheae
It is connected to air accumulator I, stores carrier gas in air accumulator I；One end of air inlet pipe II is connected to the side of tubule, the other end is located at cavity
Outside and be connected to pulse valve II, pulse valve II is connected to air accumulator II by tracheae, stores reaction gas in air accumulator II
Body；Sample is fixed on specimen holder and is respectively positioned in sample cavity；Vacuum chamber has the window that can penetrate laser；Rotating base and
Specimen holder all has magnetism, and rotating base is able to drive specimen holder and rotates around x axis；Ring electrode and heater are respectively positioned on reaction chamber
Interior, ring electrode is ring-type, and heater is cylindrical shape, and the central axis of ring electrode, the central axis of heater and tubule are coaxial and along x
Direction, can apply 5000 volts of highest of voltage on ring electrode, and the potential of heater remains zero volt；Reaction chamber has outlet,
The outlet is located in vacuum chamber and the outlet towards x positive direction, ring electrode and heater apart from reaction chamber is respectively 10 centimetres
With 2 centimetres, the laser that laser emits can enter reaction chamber by the outlet, and enter sample cavity by tubule, thus
It is mapped on sample；Droplet ejection source, quadrupole rod mass spectrum, ion trap and detector are arranged successively along y negative direction and are respectively positioned on vacuum
Intracavitary, droplet ejection source has jet port, and can eject superfluid helium droplet to y negative direction by the jet port, described
Superfluid helium droplet temperature is lower than 2.8K, and the helium atom number for including in each superfluid helium droplet is 10000 to 20000,
The axis of reaction chamber outlet exists between droplet ejection source and quadrupole rod mass spectrum and with the axis of the jet port in droplet ejection source
It is in an angle of 90 degrees in x/y plane.Sample is metal；The internal diameter of air inlet pipe I is 2mm, and the internal diameter of air inlet pipe II is 1.6mm；Tubule it is interior
Diameter is 2mm, length 15mm；The internal diameter of heater is 6mm, and the diameter of the outlet of reaction chamber is 2mm.
The step of preparation and test method of a kind of metal cluster of chemical modification are as follows:
Step 1 controls opening or closing for pulse valve I and pulse valve II by computer, so that carrier gas and reaction gas
It is filled with sample cavity and tubule respectively, and the air pressure in sample cavity is made to be consistently greater than the air pressure in reaction chamber；
Step 2 makes rotating base that specimen holder and sample be driven to rotate around x axis, and applies voltage to ring electrode, opens heating
Device；
The laser of step 3, laser transmitting passes sequentially through vacuum chamber, reaction chamber and tubule, into sample cavity and is mapped to sample
On product, so that sample surfaces partial melting, sample atoms form metal cluster and move with carrier gas into tubule；
Step 4, metal cluster move in reaction chamber with carrier gas, and interact with reaction gas, generate chemical modification
Metal cluster, and with carrier gas from reaction chamber outlet enter vacuum chamber；
Step 5, droplet ejection source eject superfluid helium droplet to y negative direction, into the part chemical modification of vacuum chamber
Metal cluster and part superfluid helium droplet mutually collide and are embedded into superfluid helium droplet, so that the metal cluster of chemical modification
Temperature decline；
Step 6, the metal cluster for being embedded into the chemical modification in superfluid helium droplet are transported with superfluid helium droplet to y negative direction
It is dynamic, and quality selection is carried out by quadrupole rod mass spectrum, meet the metal cluster of the chemical modification of mass number needed for experiment measures after
Continue and moved to y negative direction, and by eventually entering into detector after ion trap；
Collected related data is inputted computer by step 7, detector, and computer obtains chemistry after treatment and repairs
The relevant information of the metal cluster of decorations.
The beneficial effects of the present invention are:
The size difference for the metal cluster that the method for the present invention generates is smaller, and the probability for generating other products is lower, moreover,
Metal cluster is cooled down using the superfluid helium droplet of low temperature, metal cluster structure in subsequent measurement experiment is more stable.
Detailed description of the invention
It is further illustrated below with reference to figure of the invention:
Fig. 1 is schematic top plan view of the present invention.
In figure, 1. rotating bases, 2. cluster generators, 2-1. cavity, 2-2. sample cavity, 2-3. air inlet pipe I, 2-4. be thin
Pipe, 2-5. air inlet pipe II, 2-6. reaction chamber, 2-7. ring electrode, 2-8. heater, 3. specimen holders, 4. samples, 5. pulse valve I, 6.
Air accumulator I, 7. pulse valve II, 8. air accumulator II, 9. droplet ejection sources, 10. lasers, 11. quadrupole rod mass spectrums, 12. ion traps,
13. detector, 14. vacuum chambers.
Specific embodiment
If Fig. 1 is schematic top plan view of the present invention, including rotating base (1), cluster generator (2), specimen holder (3), sample
(4), pulse valve I (5), air accumulator I (6), pulse valve II (7), air accumulator II (8), droplet ejection source (9), laser (10), four
Pole bar mass spectrum (11), ion trap (12), detector (13), vacuum chamber (14) and computer, pulse valve I (5), pulse valve II (7)
With detector (13) cable connection computer, the unlatching of pulse valve I (5) Yu pulse valve II (7) can be controlled by computer
Or close, cluster generator (2) includes cavity (2-1), sample cavity (2-2), air inlet pipe I (2-3), tubule (2-4), air inlet pipe II
(2-5), reaction chamber (2-6), ring electrode (2-7) and heater (2-8), xy z are three-dimensional coordinate system, and ring electrode (2-7) is outside
It is connected to voltage source, heater (2-8) is circumscribed with current source, and one end of cluster generator (2) has rotating base (1), rotates bottom
Seat (1) and specimen holder (3) all have magnetism, and rotating base (1) is able to drive specimen holder (3) and rotates around x axis；The sample cavity
(2-2), tubule (2-4) and reaction chamber (2-6) are sequentially connected and are respectively positioned in cavity (2-1), the internal diameter of tubule (2-4) be 2mm,
Length is 15mm, and the internal diameter of air inlet pipe I (2-3) is 2mm, and one end of air inlet pipe I (2-3) is connected to sample cavity (2-2), the other end
Positioned at cavity (2-1) outside and be connected to pulse valve I (5), pulse valve I (5) is connected to air accumulator I (6), gas storage by tracheae
Tank I stores carrier gas in (6)；The internal diameter of air inlet pipe II (2-5) is 1.6mm, and one end of air inlet pipe II (2-5) is connected to tubule
The side of (2-4), the other end are located at the outside of cavity (2-1) and are connected to pulse valve II (7), and pulse valve II (7) passes through tracheae
It is connected to air accumulator II (8), air accumulator II stores reaction gas in (8)；Sample (4) is metal, and sample (4) is fixed on sample
On seat (3) and it is respectively positioned in sample cavity (2-2)；Vacuum chamber (14) has the window that can penetrate laser；Ring electrode (2-7) and add
Hot device (2-8) is respectively positioned in reaction chamber (2-6), and ring electrode (2-7) is ring-type, and heater (2-8) is cylindrical shape, ring electrode (2-
7) central axis and tubule (2-4) of central axis, heater (2-8) are coaxial and in the x-direction, can apply on ring electrode (2-7)
Add 5000 volts of highest of voltage, the internal diameter of heater (2-8) is 6mm, and the potential of heater (2-8) remains zero volt；Reaction chamber
(2-6) has outlet, and the diameter of the outlet of reaction chamber (2-6) is 2mm, and the outlet is located in vacuum chamber (14) and towards x just
Direction, the outlet of ring electrode (2-7) and heater (2-8) apart from reaction chamber (2-6) is respectively 10 centimetres and 2 centimetres, laser
(10) laser emitted can enter reaction chamber (2-6) by the outlet, and enter sample cavity (2-2) by tubule (2-4),
To be mapped on sample (4)；Droplet ejection source (9), quadrupole rod mass spectrum (11), ion trap (12) and detector (13) are along y losing side
To being arranged successively and be respectively positioned in vacuum chamber (14), droplet ejection source (9) have a jet port, and can by the jet port to
Y negative direction ejects superfluid helium droplet, and the superfluid helium droplet temperature is lower than 2.8K, includes in each superfluid helium droplet
Helium atom number is 10000 to 20000, and the axis of reaction chamber (2-6) outlet is located at droplet ejection source (9) and quadrupole rod mass spectrum
It (11) is in an angle of 90 degrees in x/y plane between and with the axis of the jet port of droplet ejection source (9).
The measuring device of the metal cluster of chemical modification include rotating base (1), cluster generator (2), specimen holder (3),
Sample (4), pulse valve I (5), air accumulator I (6), pulse valve II (7), air accumulator II (8), droplet ejection source (9), laser
(10), quadrupole rod mass spectrum (11), ion trap (12), detector (13), vacuum chamber (14) and computer, pulse valve I (5), pulse
Valve II (7) and detector (13) cable connection computer, can control pulse valve I (5) and pulse valve II (7) by computer
Open or close, cluster generator (2) include cavity (2-1), sample cavity (2-2), air inlet pipe I (2-3), tubule (2-4), into
Tracheae II (2-5), reaction chamber (2-6), ring electrode (2-7) and heater (2-8), xy z are three-dimensional coordinate system, ring electrode
(2-7) is circumscribed with voltage source, and heater (2-8) is circumscribed with current source, and one end of cluster generator (2) has rotating base (1),
The sample cavity (2-2), tubule (2-4) and reaction chamber (2-6) are sequentially connected and are respectively positioned in cavity (2-1), air inlet pipe I (2-
3) one end is connected to sample cavity (2-2), the other end is located at the outside of cavity (2-1) and is connected to pulse valve I (5), pulse valve I
(5) it is connected to air accumulator I (6) by tracheae, air accumulator I stores carrier gas in (6)；One end of air inlet pipe II (2-5) is connected to
The side of tubule (2-4), the other end are located at the outside of cavity (2-1) and are connected to pulse valve II (7), and pulse valve II (7) passes through
Tracheae is connected to air accumulator II (8), and air accumulator II stores reaction gas in (8)；Sample (4) is fixed on specimen holder (3) simultaneously
It is respectively positioned in sample cavity (2-2)；Vacuum chamber (14) has the window that can penetrate laser；Rotating base (1) and specimen holder (3) are equal
With magnetism, rotating base (1) is able to drive specimen holder (3) and rotates around x axis；Ring electrode (2-7) and heater (2-8) are respectively positioned on
In reaction chamber (2-6), ring electrode (2-7) is ring-type, and heater (2-8) is cylindrical shape, the central axis of ring electrode (2-7), heating
The central axis and tubule (2-4) of device (2-8) are coaxial and in the x-direction, can apply 5000 volts of highest of electricity on ring electrode (2-7)
Pressure, the potential of heater (2-8) remain zero volt；Reaction chamber (2-6) has outlet, and the outlet is located in vacuum chamber (14) simultaneously
Towards x positive direction, the outlet of ring electrode (2-7) and heater (2-8) apart from reaction chamber (2-6) is respectively 10 centimetres and 2 centimetres,
The laser of laser (10) transmitting can enter reaction chamber (2-6) by the outlet, and enter sample cavity by tubule (2-4)
(2-2), to be mapped on sample (4)；Droplet ejection source (9), quadrupole rod mass spectrum (11), ion trap (12) and detector (13) edge
Y negative direction is arranged successively and is respectively positioned in vacuum chamber (14), and droplet ejection source (9) have jet port, and can pass through the spray
Loophole ejects superfluid helium droplet to y negative direction, and the superfluid helium droplet temperature is lower than 2.8K, in each superfluid helium droplet
The helium atom number for including is 10000 to 20000, and the axis of reaction chamber (2-6) outlet is located at droplet ejection source (9) and quadrupole
It is in an angle of 90 degrees in x/y plane between bar mass spectrum (11) and with the axis of the jet port of droplet ejection source (9).Sample (4) is gold
Belong to；The internal diameter of air inlet pipe I (2-3) is 2mm, and the internal diameter of air inlet pipe II (2-5) is 1.6mm；The internal diameter of tubule (2-4) is 2mm, length
Degree is 15mm；The internal diameter of heater (2-8) is 6mm, and the diameter of the outlet of reaction chamber (2-6) is 2mm.
Embodiment, sample (4) are titanium, and carrier gas is nitrogen, and the pressure of nitrogen is 0.25kPa, reaction in air inlet pipe I (2-3)
Gas is oxygen, and the pressure of oxygen is 0.1kPa in air inlet pipe II (2-5), the unlatching of pulse valve I (5) and pulse valve II (7) close
The closed cycle phase is 1500 microseconds, and pulse valve I (5) opens 300 microseconds every 1500 gsecs, and pulse valve II (7) is every 1500
Gsec opens 200 microseconds, and the start-up time of pulse valve II (7) delays 200 microseconds, rotating base relative to pulse valve I (5)
(1) swing circle is 10 seconds, and the pulse laser wavelength of laser (10) transmitting is 532 nanometers, power is 5 watts, pulse period
It is 100 microseconds for 1500 microseconds, burst length, applying voltage to ring electrode (2-7) is 1000V.
The step of preparation and test method of a kind of metal cluster of chemical modification are as follows:
Step 1 is opened or closed by computer control pulse valve I (5) and pulse valve II (7), so that carrier gas and instead
It answers gas to be filled with sample cavity (2-2) and tubule (2-4) respectively, and the air pressure in sample cavity (2-2) is made to be consistently greater than reaction chamber
Air pressure in (2-6)；
Step 2 makes rotating base (1) that specimen holder (3) and sample (4) to be driven to rotate around x axis, and applies to ring electrode (2-7)
Voltage, heater (2-8)；
The laser of step 3, laser (10) transmitting passes sequentially through vacuum chamber (14), reaction chamber (2-6) and tubule (2-4),
It into sample cavity (2-2) and is mapped on sample (4), so that sample (4) surface partial melting, sample atoms form metal cluster simultaneously
The movement into tubule (2-4) with carrier gas；
Step 4, metal cluster move in reaction chamber (2-6) with carrier gas, and interact with reaction gas, generationization
The metal cluster of modification is learned, and enters vacuum chamber (14) from the outlet reaction chamber (2-6) with carrier gas；
Superfluid helium droplet is ejected to y negative direction in step 5, droplet ejection source (9), into the part of vacuum chamber (14)
The metal cluster and part superfluid helium droplet for learning modification mutually collide and are embedded into superfluid helium droplet, so that the gold of chemical modification
Belong to the temperature decline of cluster；
Step 6, the metal cluster for being embedded into the chemical modification in superfluid helium droplet are transported with superfluid helium droplet to y negative direction
It is dynamic, and quality selection is carried out by quadrupole rod mass spectrum (11), meet the metal group of the chemical modification of mass number needed for experiment measures
Cluster continues to move to y negative direction, and by eventually entering into detector (13) after ion trap (12)；
Collected related data is inputted computer by step 7, detector (13), and computer is changed after treatment
Learn the relevant information of the metal cluster of modification.
The method that the method for the present invention contactlessly drives specimen holder to rotate using magnetic rotating base so that laser melt it is steamed
Sample is heated evenly under laser in journey, and using the air supply method of special carrier gas and reaction gas to avoid other products
It generates, moreover, using the cooling method of the superfluid helium droplet of low temperature so that metal cluster is more stable.
Claims (1)
1. a kind of preparation and test method of the metal cluster of chemical modification, the measuring device of the metal cluster of chemical modification include
Rotating base (1), cluster generator (2), specimen holder (3), sample (4), pulse valve I (5), air accumulator I (6), pulse valve II
(7), air accumulator II (8), droplet ejection source (9), laser (10), quadrupole rod mass spectrum (11), ion trap (12), detector
(13), vacuum chamber (14) and computer, pulse valve I (5), pulse valve II (7) and detector (13) cable connection computer, lead to
Opening or closing for pulse valve I (5) and pulse valve II (7) can be controlled by crossing computer, and cluster generator (2) includes cavity (2-
1), sample cavity (2-2), air inlet pipe I (2-3), tubule (2-4), air inlet pipe II (2-5), reaction chamber (2-6), ring electrode (2-7) and
Heater (2-8), xyz are three-dimensional coordinate system, and ring electrode (2-7) is circumscribed with voltage source, and heater (2-8) is circumscribed with electric current
The one end in source, cluster generator (2) has rotating base (1), the sample cavity (2-2), tubule (2-4) and reaction chamber (2-6)
It is sequentially connected and is respectively positioned in cavity (2-1), one end of air inlet pipe I (2-3) is connected to sample cavity (2-2), the other end is located at chamber
The outside of body (2-1) is simultaneously connected to pulse valve I (5), and pulse valve I (5) is connected to air accumulator I (6) by tracheae, air accumulator I (6)
In store carrier gas；One end of air inlet pipe II (2-5) is connected to the side of tubule (2-4), the other end is located at the outer of cavity (2-1)
Face is simultaneously connected to pulse valve II (7), and pulse valve II (7) is connected to air accumulator II (8) by tracheae, storage in air accumulator II (8)
There is reaction gas；Sample (4) is fixed on specimen holder (3) and is respectively positioned in sample cavity (2-2)；Vacuum chamber (14) has can be saturating
Cross the window of laser；Rotating base (1) and specimen holder (3) all have magnetism, and rotating base (1) is able to drive specimen holder (3) around x
Axis rotation；Ring electrode (2-7) and heater (2-8) are respectively positioned in reaction chamber (2-6), and ring electrode (2-7) is ring-type, heater
(2-8) is cylindrical shape, and the central axis of ring electrode (2-7), the central axis of heater (2-8) and tubule (2-4) are coaxial and along the side x
To 5000 volts of highest of voltage can be applied on ring electrode (2-7), and the potential of heater (2-8) remains zero volt；Reaction chamber
(2-6) has outlet, and the outlet is located in vacuum chamber (14) and towards x positive direction, ring electrode (2-7) and heater (2-8)
Outlet apart from reaction chamber (2-6) is respectively 10 centimetres and 2 centimetres, and the laser of laser (10) transmitting can pass through the outlet
Enter sample cavity (2-2) into reaction chamber (2-6), and by tubule (2-4), to be mapped on sample (4)；Droplet ejection source
(9), quadrupole rod mass spectrum (11), ion trap (12) and detector (13) are arranged successively along y negative direction and are respectively positioned on vacuum chamber (14)
Interior, droplet ejection source (9) have jet port, and can eject superfluid helium droplet to y negative direction by the jet port, described
Superfluid helium droplet temperature is lower than 2.8K, and the helium atom number for including in each superfluid helium droplet is 10000 to 20000,
Reaction chamber (2-6) outlet axis be located between droplet ejection source (9) and quadrupole rod mass spectrum (11) and with droplet ejection source (9)
Jet port axis in x/y plane be in an angle of 90 degrees；Sample (4) is metal, and the internal diameter of air inlet pipe I (2-3) is 2mm, air inlet pipe
The internal diameter of II (2-5) is 1.6mm, and the internal diameter of tubule (2-4) is 2mm, length 15mm, and the internal diameter of heater (2-8) is 6mm,
The diameter of the outlet of reaction chamber (2-6) is 2mm,
It is characterized in that: the step of preparation and test method of a kind of metal cluster of chemical modification are as follows:
Step 1, by opening or closing for computer control pulse valve I (5) and pulse valve II (7), so that carrier gas and reaction gas
Body is filled with sample cavity (2-2) and tubule (2-4) respectively, and the air pressure in sample cavity (2-2) is made to be consistently greater than reaction chamber (2-6)
In air pressure；
Step 2 makes rotating base (1) that specimen holder (3) and sample (4) to be driven to rotate around x axis, and applies electricity to ring electrode (2-7)
Pressure, heater (2-8)；
The laser of step 3, laser (10) transmitting passes sequentially through vacuum chamber (14), reaction chamber (2-6) and tubule (2-4), enters
Sample cavity (2-2) is simultaneously mapped on sample (4), so that sample (4) surface partial melting, sample atoms form metal cluster and with load
Gas movement into tubule (2-4)；
Step 4, metal cluster move in reaction chamber (2-6) with carrier gas, and interact with reaction gas, generate chemistry and repair
The metal cluster of decorations, and enter vacuum chamber (14) from the outlet reaction chamber (2-6) with carrier gas；
Superfluid helium droplet is ejected to y negative direction in step 5, droplet ejection source (9), and the part chemistry into vacuum chamber (14) is repaired
The metal cluster and part superfluid helium droplet of decorations mutually collide and are embedded into superfluid helium droplet, so that the metal group of chemical modification
The temperature of cluster declines；
Step 6, the metal cluster for being embedded into the chemical modification in superfluid helium droplet are moved with superfluid helium droplet to y negative direction, and
Quality selection is carried out by quadrupole rod mass spectrum (11), the metal cluster for meeting the chemical modification of mass number needed for experiment measures continues
It is moved to y negative direction, and by eventually entering into detector (13) after ion trap (12)；
Collected related data is inputted computer by step 7, detector (13), and computer obtains chemistry after treatment and repairs
The relevant information of the metal cluster of decorations.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116060627A (en) * | 2023-01-09 | 2023-05-05 | 天津大学 | Laser sputtering pulse cluster source for preparing ultralow-temperature clusters |
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| CN107121694A (en) * | 2017-05-26 | 2017-09-01 | 宜昌后皇真空科技有限公司 | A kind of method and system for monitoring pulse gas cluster ions beam on-line |
| CN107727730A (en) * | 2017-11-29 | 2018-02-23 | 厦门大学 | A kind of dual reflective flight time mass spectrum optoelectronic speed imager |
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| CN116060627A (en) * | 2023-01-09 | 2023-05-05 | 天津大学 | Laser sputtering pulse cluster source for preparing ultralow-temperature clusters |
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