CN106219516A - A kind of method that solution left standstill method prepares oriented alignment single armed CNT - Google Patents

A kind of method that solution left standstill method prepares oriented alignment single armed CNT Download PDF

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CN106219516A
CN106219516A CN201610604496.2A CN201610604496A CN106219516A CN 106219516 A CN106219516 A CN 106219516A CN 201610604496 A CN201610604496 A CN 201610604496A CN 106219516 A CN106219516 A CN 106219516A
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swcn
solution
left standstill
oriented alignment
solution left
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CN106219516B (en
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王军
周泓希
黄泽华
孙斌玮
吴雪飞
姬春晖
蒋亚东
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University of Electronic Science and Technology of China
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82BNANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS, MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES AS DISCRETE UNITS; MANUFACTURE OR TREATMENT THEREOF
    • B82B3/00Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
    • B82B3/0061Methods for manipulating nanostructures
    • B82B3/0066Orienting nanostructures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00Manufacture or treatment of nanostructures
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM

Abstract

The invention discloses a kind of method that solution left standstill method prepares oriented alignment SWCN, by surface is rested on SWCN with the substrate tilting of parallel pole, in colloidal liquid that deionized water, surfactant, organic polymer are mixed to prepare, owing to parallel pole enables CNT oriented alignment between parallel pole to the dimensional effect of CNT.This method is compared traditional chemical vapour deposition technique and is prepared aligned carbon nanotube arranged vertically, simple to operate, is prepared for the CNT of horizontal orientation arrangement, can apply in scene effect pipe, field emission device and chemical sensor.

Description

A kind of method that solution left standstill method prepares oriented alignment single armed CNT
Technical field
The present invention relates to function film preparation method, belong to nano film material field and field of nanometer devices, specifically relate to And a kind of method that novel solution left standstill method prepares oriented alignment SWCN.
Background technology
Carbon nano-tube material is as a kind of new functional material enjoying various countries to pay close attention in recent years, and it has good current-carrying The features such as transport factor and electric current transport ability, good mechanical property, good optical property make its scene effect pipe, field send out The devices such as emitter, semiconductor probe, chemical sensor possesses good application prospect.
For many years, SWCN is silica-based owing to its good electric property and ultra-thin structure are seen as replacing The new material of TFT.The method preparing SWCN TFT is divided into two kinds: chemical vapour deposition technique and solution Filtration. Chuan Wang in 2009 etc. utilize solution Filtration method to be prepared for high performance SWCN TFT, and electric current density reaches 10uA/ m, on-off ratio is more than 104.(Chuan Wang etc Wafer~Scale Fabrication of Separated Carbon Nanotube Thin~Film Transistors for Display Applications, Nano Letters, 2009,Vol.9,No.12)。
S.J Wind in 2002 etc. utilize chemical vapour deposition technique to be prepared for SWCN TFT, and electric current density reaches 2100 uA/um.(S.J Wind etc Vertical scaling of carbon nanotube field~effect transistors using top gate electrodes, Applied physics Letters,2002,Vol.80, No.20) but the CNT TFT for preparing of these methods is owing to the density of CNT is low and non-directional characteristic, its electrical property Application demand can not reached.In order to solve problem above, Hyunhyub Ko etc. proposes one can allow carbon nano-tube oriented alignment Method.And when using solution Filtration, the polymer solution of CNT is fixed in certain area coverage when film forming, And by self-assembled film Parallel Growth on silicon chip, at silicon chip plated film again, CNT can be directional trend arrangement due to dimensional effect (due to the length being smaller than CNT of self-assembled film).(Hyunhyub Ko etc Liquid~Crystalline Processing of Highly Oriented Carbon Nanotube Arrays for Thin~Film Transistors, Nano Letters, 2006, Vol.6, No.7) but this method is owing to obtaining the thin film aligned After plated electrode again, may have residue when removing self-assembled film, affect structural behaviour, and be difficult to determine the CNT of orientation Region, operation complexity, it is not easy to prepare intact device.
Summary of the invention
It is an object of the invention to how to overcome prepare CNT high cost, preparation is complicated, carbon nanotube concentration is too low And the shortcoming such as do not have directionality, electric property poor, improves existing CNT and prepares method, simplify preparation method, it is thus achieved that High performance CNT.
Proposed by the invention technical problem is that so solution: provide a kind of novel solution left standstill method preparation orientation row The method of cloth SWCN, it is characterised in that have steps of:
(1) by SWCN, deionized water, surfactant mix homogeneously, solution 1 is obtained;
(2) in solution 1, add organic polymer, mix homogeneously, obtain black colloidal liquid, ie in solution 2;
(3) substrate tilting with parallel pole is rested in solution 2, prepare wet film;
(4), under room temperature, normal atmospheric conditions makes the thin film spontaneous nucleation in step (3), is formed in parallel with substrate and aligns SWCN figure;
(5) unnecessary part is removed in photoetching, obtains complete aligned carbon nanotube figure.
Further, described SWCN is 1:5~10 with the mass ratio of surfactant.
Further, described SWCN is 1:10~20 with the mass ratio of organic polymer.
Further, described surfactant and organic polymer can allow SWCN be suspended in solution surface.
Described prepares environment for requirements such as general room environment, inert free gas protection, adiabatic dryings.
Described surfactant is Dodecyl trimethyl ammonium chloride, cetyl trimethylammonium bromide, dodecyl One or more in benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium, preferably dodecylbenzene sodium sulfonate;
Described organic polymer is many peptides or protein, such as polystyrene Sulfonate, polyvinyl alcohol, polyvinylpyrrolidone Deng, preferably polyvinylpyrrolidone.
Further, the thickness of described substrate does not has particular/special requirement, is provided with 300~500nm insulating barriers above it, absolutely Being provided with the metal level of 100~300nm in edge layer, metal layer lithography goes out parallel pole.
As preferably, described insulating barrier is SiO2Insulating barrier, a length of the 0.1 of described parallel pole~5mm, electrode Between spacing be 3~30 m.Distribution CNT in-between the electrodes can be played orientation by parallel pole figure.
Further, described step (3) tilts to stand to refer to be 3~20 ° of cultivations favoured equipped with solution 2 by substrate In ware, and making the long limit of parallel pole horizontal by 3~20 ° of angles, in described step (3), time of repose is 24~72 little Time.
Further, described step (1) all uses ultrasonic mixing with the mixing in step (2).
As preferably, described step (1) or step (2) can be combined with magnetic agitation while using ultrasonic mixing, The magnetic agitation temperature of described step (1) is 60~80 DEG C, and the time is 3~6 hours, the magnetic agitation temperature of described step (2) Being 60~80 DEG C for temperature, the time is 10~30min.
The CNT using method of the present invention to prepare, has the advantage that
A. orientating products is good, stable electrical properties, Stability Analysis of Structures, uniform, smooth;
The most first carrying out interdigital electrode, recycle the interdigital electrode orientation to CNT, whole technological operation is simple;
C. normal-temperature reaction, and to environment without particular/special requirement, equipment requirements is low, need small investment, product cost low;
D. reactant is nontoxic, does not pollutes the environment and affects health.
Accompanying drawing explanation
Fig. 1 is the inventive method flow chart;
Fig. 2 is the orientation SEM figure of SWCN between embodiment 1 products obtained therefrom parallel pole;
Fig. 3 is the non-directional SEM figure of the outer SWCN of embodiment 1 products obtained therefrom parallel pole;
Fig. 4 is the inventive method schematic diagram (cross section);
Wherein, 1 be substrate, 2 for SiO2Insulating barrier, 3 be parallel pole, 4 for oriented alignment SWCN.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing the present invention done and further describes:
Embodiment 1: a kind of method that solution left standstill method prepares oriented alignment SWCN, comprises the following steps:
(1) take 20mL deionized water to load in beaker, weigh CNT 15mg, weigh dodecylbenzene sodium sulfonate 100mg and add Entering in beaker, put into magnet rotor in beaker, put into by beaker in magnetic stirrer, regulation temperature is 70 DEG C, and rotating speed is 12rad/ S, magnetic agitation 3 hours, carry out ultrasonic mixing simultaneously, make dodecylbenzene sodium sulfonate and CNT be dispersed in deionization In water, obtain solution 1;
(2) taking polyvinylpyrrolidone 150mg and join in solution 1, regulation temperature is 70 DEG C, and rotating speed 12rad/s, magnetic force stirs Mix 10 minutes, carry out ultrasonic mixing simultaneously, obtain black colloidal liquid, ie in solution 2;
(3) use solution left standstill method to prepare wet film, the substrate with parallel pole is rested in solution 2 with 5 ° of overturning angles and prepares Wet film, stands crystallization in 24 hours;
(4) excess carbon nanotubes outside raceway groove is fallen in photoetching, obtains product.
Use field emission scanning electron microscope (SEM) that product is tested, obtain Fig. 2, Fig. 3, Fig. 2, Fig. 3 contrast, Orientating products performance is good, even structure, smooth, stable.
Embodiment 2: a kind of method that solution left standstill method prepares oriented alignment SWCN, comprises the following steps:
(1) take 20mL deionized water to load in beaker, weigh CNT 15mg, weigh Dodecyl trimethyl ammonium chloride 75mg, cetyl trimethylammonium bromide 75mg add in beaker, ultrasonic mixing, make ten behenyl ammonium bromide, Cetyl trimethylammonium bromide and CNT are dispersed in deionized water, obtain solution 1;
(2) take polystyrene Sulfonate 150mg, polyvinyl alcohol 150mg joins in solution 1, obtains black glue after ultrasonic mix homogeneously Shape liquid, ie in solution 2;
(3) use solution left standstill method to prepare wet film, the substrate with parallel pole is rested in solution 2 with 2 ° of overturning angles and prepares Wet film, stands crystallization in 72 hours;
(4) excess carbon nanotubes outside raceway groove is fallen in photoetching, obtains product.
Embodiment 3: a kind of method that solution left standstill method prepares oriented alignment SWCN, comprises the following steps:
(1) take 20mL deionized water to load in beaker, weigh CNT 15mg, weigh cetyl trimethylammonium bromide 40mg, dodecylbenzene sodium sulfonate 60mg add in beaker, put into magnet rotor, put into by beaker in magnetic stirrer in beaker, Regulation temperature is 80 DEG C, and rotating speed is 12rad/s, magnetic agitation 5 hours, carries out ultrasonic mixing simultaneously, makes DBSA Sodium and CNT are dispersed in deionized water, obtain solution 1;
(2) taking polyvinyl alcohol 200mg and join in solution 1, regulation temperature is 80 DEG C, rotating speed 12rad/s, magnetic agitation 20 points Clock, carries out ultrasonic mixing simultaneously, obtains black colloidal liquid, ie in solution 2;
(3) use solution left standstill method to prepare wet film, the substrate with parallel pole is rested in solution 2 with 30 ° of overturning angles and makes Standby wet film, stands crystallization in 48 hours;
(4) excess carbon nanotubes outside raceway groove is fallen in photoetching, obtains product.
Embodiment 4: a kind of method that solution left standstill method prepares oriented alignment SWCN, comprises the following steps:
(1) take 20mL deionized water to load in beaker, weigh CNT 15mg, weigh dodecylbenzene sodium sulfonate 75mg and add Entering in beaker, put into magnet rotor in beaker, put into by beaker in magnetic stirrer, regulation temperature is 60 DEG C, and rotating speed is 12rad/ S, magnetic agitation 6 hours, carry out ultrasonic mixing simultaneously, make dodecylbenzene sodium sulfonate and CNT be dispersed in deionization In water, obtain solution 1;
(2) taking the protein 300mg that SWCN can be allowed to be suspended in solution surface and join in solution 1, regulation temperature is 60 DEG C, rotating speed 12rad/s, magnetic agitation 30 minutes, carry out ultrasonic mixing simultaneously, obtain black colloidal liquid, ie in solution 2;
(3) use solution left standstill method to prepare wet film, the substrate with parallel pole is rested in solution 2 with 5 ° of overturning angles and prepares Wet film, stands crystallization in 72 hours;
(4) excess carbon nanotubes outside raceway groove is fallen in photoetching, obtains product.
Embodiment 5: a kind of method that solution left standstill method prepares oriented alignment SWCN, comprises the following steps:
(1) take 20mL deionized water to load in beaker, weigh CNT 15mg, weigh dodecylbenzene sodium sulfonate 80mg and add Enter in beaker, carry out ultrasonic mixing, make dodecylbenzene sodium sulfonate and CNT dispersed in deionized water, obtain molten Liquid 1;
(2) take the polypeptides matter 250mg that SWCN can be allowed to be suspended in solution surface to join in solution 1, surpass Sound mixes, and obtains black colloidal liquid, ie in solution 2;
(3) use solution left standstill method to prepare wet film, the substrate with parallel pole is rested in solution 2 with 12 ° of overturning angles and makes Standby wet film, stands crystallization in 36 hours;
(4) excess carbon nanotubes outside raceway groove is fallen in photoetching, obtains product.
As it has been described above, only present pre-ferred embodiments, therefore appoint all without departing from this programme technology contents, according to this Above example is made any simple change, equivalent variations and modification by bright technical spirit, all still falls within the technology of the present invention The scope of scheme.

Claims (10)

1. the method that a solution left standstill method prepares oriented alignment SWCN, it is characterised in that comprise the following steps:
(1) by SWCN, deionized water, surfactant mix homogeneously, solution 1 is obtained;
(2) in solution 1, add organic polymer, mix homogeneously, obtain black colloidal liquid, ie in solution 2;
(3) substrate tilting with parallel pole is rested in solution 2, prepare wet film;
(4), under room temperature, normal atmospheric conditions makes the thin film spontaneous nucleation in step (3), is formed in parallel with substrate and aligns SWCN figure;
(5) unnecessary part is removed in photoetching, obtains complete aligned carbon nanotube figure.
The method that a kind of solution left standstill method the most according to claim 1 prepares oriented alignment SWCN, its feature It is: in described step (1), SWCN is 1:5~10 with the mass ratio of surfactant.
The method that a kind of solution left standstill method the most according to claim 1 prepares oriented alignment SWCN, its feature It is: in described step (2), SWCN and organic polymer mass ratio are 1:10~20.
4. the side of oriented alignment SWCN is prepared according to the arbitrary described a kind of solution left standstill method of claim 1,2,3 Method, it is characterised in that: described surfactant and organic polymer can allow SWCN float over solution surface.
The method that a kind of solution left standstill method the most according to claim 4 prepares oriented alignment SWCN, its feature It is: described surfactant is Dodecyl trimethyl ammonium chloride, cetyl trimethylammonium bromide, detergent alkylate sulphur One or more in acid sodium, cetyl benzenesulfonic acid sodium, preferably dodecylbenzene sodium sulfonate;Described organic polymer is Many peptides or protein, preferably polyvinylpyrrolidone.
6. the method preparing oriented alignment SWCN according to a kind of solution left standstill method described in claim 1, it is special Levy and be: described substrate is provided above the insulating barrier of 300~500nm, insulating barrier is provided with the metal of 100~300nm Layer, metal layer lithography goes out parallel pole figure.
The method that a kind of solution left standstill method the most according to claim 6 prepares oriented alignment SWCN, its feature It is: described insulating barrier is SiO2Insulating barrier, described parallel pole a length of 0.1~5mm, interelectrode spacing be 3~ 30 µm。
The method that a kind of solution left standstill method the most according to claim 1 prepares oriented alignment SWCN, its feature It is: described step (3) tilts standing and refers to that will be 3~20 ° by substrate favours in the culture dish equipped with solution 2, and Making the long limit of parallel pole horizontal by 3~20 ° of angles, time of repose is 24~72 hours.
The method that a kind of solution left standstill method the most according to claim 1 prepares oriented alignment SWCN, its feature It is: described step (1) uses ultrasonic mixing with the mixing in step (2).
The method that a kind of solution left standstill method the most according to claim 1 prepares oriented alignment SWCN, its feature It is: described step (1) or step (2) can be combined with magnetic agitation while using ultrasonic mixing, described step (1) Magnetic agitation temperature is 60~80 DEG C, and the time is 3~6 hours, the magnetic agitation temperature of described step (2) be temperature be 60~80 DEG C, the time is 10~30min.
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CN110282974A (en) * 2019-06-28 2019-09-27 华南理工大学 Oriented alignment magnetic carbon fiber graphene composite film and its preparation method and application
CN114149001A (en) * 2021-12-22 2022-03-08 浙江大学 Preparation, transfer and orientation determination method of self-assembled carbon nanotube array for terahertz
CN115340085A (en) * 2022-05-12 2022-11-15 中山大学 Carbon nanotube film with controllable surface density and preparation method and application thereof

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CN109534317A (en) * 2017-09-21 2019-03-29 中国科学院物理研究所 A kind of preparation method of carbon nano-tube film
CN109534317B (en) * 2017-09-21 2021-11-23 中国科学院物理研究所 Preparation method of carbon nanotube film
CN109761222A (en) * 2017-11-09 2019-05-17 北京华碳元芯电子科技有限责任公司 The method for removing carbon nano tube surface dispersing agent using being evaporated in vacuo
CN110282974A (en) * 2019-06-28 2019-09-27 华南理工大学 Oriented alignment magnetic carbon fiber graphene composite film and its preparation method and application
CN110282974B (en) * 2019-06-28 2020-12-29 华南理工大学 Oriented magnetic carbon fiber graphene composite membrane and preparation method and application thereof
CN114149001A (en) * 2021-12-22 2022-03-08 浙江大学 Preparation, transfer and orientation determination method of self-assembled carbon nanotube array for terahertz
CN115340085A (en) * 2022-05-12 2022-11-15 中山大学 Carbon nanotube film with controllable surface density and preparation method and application thereof

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