CN101259959B - Manufacturing method and application of single-layer carbon nano-tube - Google Patents
Manufacturing method and application of single-layer carbon nano-tube Download PDFInfo
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- CN101259959B CN101259959B CN2007100800276A CN200710080027A CN101259959B CN 101259959 B CN101259959 B CN 101259959B CN 2007100800276 A CN2007100800276 A CN 2007100800276A CN 200710080027 A CN200710080027 A CN 200710080027A CN 101259959 B CN101259959 B CN 101259959B
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Abstract
The invention provides a manufacturing method for a single-layer carbon nano tube, by which a beaming single-layer carbon nano tube can be desirably separated into independent single-layer carbon nano tubes without sacrificing the inherent chemical property of single-layer carbon nano tubes and the length of single-layer carbon nano tubes just synthesized; moreover, the invention also provides a manufacturing method for a single-layer carbon nano tube application device utilizing the manufacturing method for the single-layer carbon nano tube, wherein FePt nano particles or CeO2 nano particlesare dispersed in water solution such as tetramethylammonium hydroxide water solution, etc., and the single-layer carbon nano tubes synthesized by various methods are added in the water solution, and the suspension liquid is obtained after the ultrasonic treatment of the water solution, and independent separated single-layer carbon nano tubes are obtained by stirring up the suspension liquid.
Description
Technical field
The present invention relates to the manufacture method of single-layer carbon nano-tube and the manufacture method of single-layer carbon nano-tube application apparatus, for example, is to be applicable to the appropriate means of making the electronic component that uses single-layer carbon nano-tube.
Background technology
The dispersion of single-layer carbon nano-tube has attracted many research interest.This is because the dispersion of single-layer carbon nano-tube and to peel off be indispensable cause (with reference to non-patent literature 1,2) in the further application in nano composite material, electronics and other field.Single-layer carbon nano-tube after just synthetic owing to actual Van der Waals force (～950meV/nm) have a tendency (with reference to non-patent literature 3) of the tube bank that is gathered into tens of or hundreds of single single-layer carbon nano-tubes, be difficult to these dispersions, more be difficult to peel off into one single-layer carbon nano-tube.And then according to circumstances, there is when removing the such mechanical forces of ultrasonic wave accumulative tendency once more in one single-layer carbon nano-tube.In order to increase the solubleness of single-layer carbon nano-tube in water or organic solvent, certain methods has been proposed, these mainly are divided into covalent linkage formula method or non covalent bond formula method (with reference to non-patent literature 4,5).Covalent linkage formula method is that hydridization is followed lossy chemically changed method from sp2 simultaneously to sp3 variation and conjugated.The inherent character of single-layer carbon nano-tube after this processing, be interfered (with reference to non-patent literature 6).Non covalent bond formula method is mainly based on compoundization of supramolecule of utilizing the such magnetism of Van der Waals force and π-accumulative facies mutual effect (with reference to non-patent literature 7).Yet these methods can be disperseed the tube bank of single-layer carbon nano-tube usually, but tube bank can not be peeled off by single dispersive single-layer carbon nano-tube.
Propose some and be used for the tube bank of single-layer carbon nano-tube is separated into the stripping means of one single-layer carbon nano-tube.Effective means is the method for carrying out ultrasonication in the aqueous solution of the tensio-active agent of sodium lauryl sulphate (SDS) (with reference to non-patent literature 8,9) and Sodium dodecylbenzene sulfonate (NaDDBS) (with reference to non-patent literature 10) or polysaccharide (Sudan Gum-arabic) (with reference to non-patent literature 11) and so on.Behind the high speed centrifugation, utilize low temperature transmission electron microscope (TEM) in supernatant liquor, to can be observed by the single single-layer carbon nano-tube of peeling off (with reference to non-patent literature 12).In addition, one single-layer carbon nano-tube is suspended in 102%H
2SO
4And so on super acids in the time, found nematic liquid crystal structure (with reference to non-patent literature 13～15).Yet yield is quite low, and to peel off be to reach by sacrificing the long length of its inherent.In addition, the such biomolecules of DNA, peptide and protein also demonstrates and peels off single-layer carbon nano-tube and make it stable character (with reference to non-patent literature 16～19) in water.
Zhu etc. have reported by the ZrO of interpolation with strong positive electricity
2Nano particle disperses single-layer carbon nano-tube (with reference to non-patent literature 20).Yet it is so good that this dispersion state is unlike among the SDS, can't observe by ZrO clearly
2Nano particle causes peels off effect.
Non-patent literature 1:Carbon Nanotubes:Synthesis, Structure, Properties, and Applications; Dresselhaus, M.S.; Dresselhaus, G.; Avouris, Ph., Eds.; Springer, New York, 2001
Non-patent literature 2:Gregory G.Wildgoose, G.G.; Banks, C.E., Compton, R.G., Small, 2006,2 (2), 182-193
Non-patent literature 3:Thess, A.; Lee, R.; Nikolaev, P.; Dai, H.J.; Petit, P.; Robert, J.; Xu, C.H.; Lee, Y.H.; Kim, S.G.; Rinzler, A.G.; Colbert, D.T.; Scuseria, G.E.; Tomanek, D.; Fisher, J.E.; Smalley, R.E., Science, 1996,273,483-487
Non-patent literature 4:Balasubramanian, K.; Burghard, M., Small, 2005,1 (2), 180-192
Non-patent literature 5:Hirsch A.; Vostrowsky O., Top Curr.Chem.2005,245,193-237
Non-patent literature 6:Wang, H.; Zhou, W.; Ho, D.L.; Winey, K.I.; Fischer, J.E.; Glinka, C.J.; Hobbie, E.K., Nano Lett.2004,4,1789
Non-patent literature 7:Bahr, J.L.; Yang, J.P.; Kosynkin, D.V.; Bronikowski, M.J.; Smalley, R.E.; Tour, J.M., J.Am.Chem.Soc., 2001,123,6536
Non-patent literature 8:O ' Connell, M.J.; Bachilo, S.M.; Huffman, C.B.; Moore, V.C.; Strano, M.S.; Haroz, E.H.; Rialon, K.L.; Boul, P.J.; Noon, W.H.; Kittrell, C.; Ma, J.; Hauge, R.H.; Weisman, R.B.; Smalley, R.E., Science, 2002,297,593-596
Non-patent literature 9:Grossiord, N.; Regev, O.; Loos, J.; Meuldijk, J.; Koning, C.E., Anal.Chem.; 2005,77 (16), 5135-5139
Non-patent literature 10:Moore, V.C.; Strano, M.S.; Haroz, E.H.; Hauge, R.H.; Smalley, R.E.; Schmidt, J.; Talmon, Y., Nano Lett.2003,3,1379
Non-patent literature 11:Bandyopadhyaya, R.; Nativ-Roth, E.; Regev, O.; Yerushalmi-Rozen, R., Nano Lett., 2002,2,25-28
Non-patent literature 12:Islam, H.F.; Rojers, E; Bergey, D.M., Johnson, A.T.; Yodh, A.G., Nano Lett., 2003,3,269-273
Non-patent literature 13:Davis, V.A.; Ericson, L.M.; Parra-Vasquez, A.N.G., Fan, H.; Wang, Y.H.; Prieto, V.; Longoria, J.A.; Ramesh, S.; Saini, R.K.; Kittrell, C.; Billups, W.E.; Adams, W.W.; Hauge, R.H.; Smalley, R.E.; Pasquali, M., Macromolecules, 2004,37,154-160
Non-patent literature 14:Ramesh, S.; Ericson, L.M.; Davis, V.A.; Saini, R.K.; Kittrell, C.; Pasquali, M., Billups, W.E.; Adams, W.W.; Hauge, R.H.; Smalley, R.E., J.Phys.Chem.B.2004,108,8794-8798
Non-patent literature 15:Rai, P.K.; Pinnick, R.A.; Parra-Vasquez, A.N.G.; Davis, V.A.; Schmidt, H.K.; Hauge, R.H.; Smalley, R.E.; Pasquali, M., J.Am.Chem.Soc., 2006,128,591-595
Non-patent literature 16:Zheng, M.; Jagota, A.; Semke, E.D.; Diner, B.A.; McLean, R.S.; Lustig, S.R.; Richardson, R.E.; Tassi, N.G., Nat.Mater.2003,2,338-342
Non-patent literature 17:JACS, 2004,126,7222-7227
Non-patent literature 18:Karajanagi, S.S.; Yang, H.C.; Asuri, P.; Sellitto, E.; Dordick, J.S.; Kane, R.S., Langmuir 2006,22,1392-1395
Non-patent literature 19:Nepal, D.; Geckeler, K.E., Small, 2006,2,406-412
Non-patent literature 20:Zhu, J.; Yudasaka, M.; Zhang, M.F.; Iijima, S., J.Phys.Chem.B.2004,108,11317-11320
Non-patent literature 21:Saita, S.; Maenosono, S., Chem.Mater., 2005,17,3705
Non-patent literature 22:Salgueirino-Maceira, V.; Liz-Marzan, L.M.; Farle, M., Langmuir 2004,20, and 6946
Non-patent literature 23:Yang, S.W.; Gao, L., J.Am.Chem.Soc., 2006,128,9330
Non-patent literature 24:Jiang, C.Y.; Kempa, K.; Zhao, J.L.; Schlecht, U.; Kolb, U.; Basche, T.; Burghard, M.; Mews, A., Phys.Rev.B., 2002,66,161404
Summary of the invention
The problem that invention will solve
The problem to be solved in the present invention is to provide a kind of manufacture method of single-layer carbon nano-tube, it can be dispersed into one single-layer carbon nano-tube well with the single-layer carbon nano-tube of boundlingization, and can not sacrifice the length of single-layer carbon nano-tube inherent chemical property and the length after firm synthesizing.
Another problem that the present invention will solve is to provide a kind of manufacture method of single-layer carbon nano-tube application apparatus, and it makes single-layer carbon nano-tube by the manufacture method of utilizing above-mentioned single-layer carbon nano-tube, can make high performance single-layer carbon nano-tube application apparatus.
The method that is used to deal with problems
People of the present invention have carried out active research in order to address the above problem, and found that by being dispersed with the FePt particle or the CeO of nanometer size
2Ultrasonication behind the interpolation single-layer carbon nano-tube in the particulate aqueous solution, and stir the suspension obtain thus, can obtain by single dispersive single-layer carbon nano-tube, but and former state keep single-layer carbon nano-tube inherent chemical property and just synthetic after length length and can not sacrifice these character, thereby worked out the present invention.
That is, in order to address the above problem, the 1st invention is characterized in that for the manufacture method of single-layer carbon nano-tube this method possesses following steps:
Be dispersed with the FePt particle or the CeO of nanometer size
2Add the step of single-layer carbon nano-tube in the particulate aqueous solution;
Ultrasonication has been added the described aqueous solution of described single-layer carbon nano-tube and has been obtained the step of suspension;
Stir the step of described suspension.
The 2nd invention is characterized in that for the manufacture method of single-layer carbon nano-tube application apparatus this method possesses following steps:
Be dispersed with the FePt particle or the CeO of nanometer size
2Add the step of single-layer carbon nano-tube in the particulate aqueous solution;
Ultrasonication has been added the described aqueous solution of described single-layer carbon nano-tube and has been obtained the step of suspension;
Stir the step of described suspension.
In the 1st and the 2nd invention, when being dispersed with the FePt particle or the CeO of nanometer size
2When adding behind the single-layer carbon nano-tube ultrasonication in the particulate aqueous solution, the tube bank that the single-layer carbon nano-tube of boundlingization is thinner owing to action of ultrasonic waves becomes, simultaneously, these FePt particle or CeO
2Particle deeply is penetrated in the slit etc. between the single-layer carbon nano-tube in the tube bank.So, when the suspension that utilizes ultrasonication to obtain is like this stirred, owing to be penetrated into FePt particle or CeO in the slit etc. of tube bank
2Single dispersive state is stripped from in the effect of the mechanical force that particle applied, single-layer carbon nano-tube.This method need be by tensio-active agent or additional polymkeric substance parcel single-layer carbon nano-tube, favourable owing to use the aqueous solution in handling to environment, and then can avoid long ultrasonication, thereby the length that can former state keeps the single-layer carbon nano-tube after just synthetic, and, can not damage single-layer carbon nano-tube inherent chemical property owing to can not produce the damage etc. of single-layer carbon nano-tube sidewall yet.
In the 1st and the 2nd invention, FePt particle or CeO
2Particle can also can a plurality ofly be assembled in single separation, as long as its size is the nanometer size.These FePt particle or CeO
2The particulate size is generally for example 2～10nm.FePt particle or CeO
2The size that particle is single when separating is typically 2～5nm, but is not limited thereto.At this, so-called these FePt particle or CeO
2The particulate size is as these FePt particle or CeO
2Particle is meant its diameter when being spherical, be meant these FePt particle or CeO when not being spherical
2Particulate overall dimension.These FePt particle or CeO
2The big I of particulate is easily measured by electron microscope observation, X-ray diffraction etc.The FePt particulate is formed and can be selected as required.This FePt particulate composition is expressed as Fe
xPt
1-xThe time, when 0.45 ≦ x ≦ 0.65, can obtain the high magneticanisotropy that other material can't obtain, can under magnetic field, easily be orientated.Disperse FePt particle or CeO
2The particulate aqueous solution is the aqueous solution of tetramethylammonium hydroxide (TMAOH) for example, but is not limited thereto.Particularly when the FePt particles dispersed was disperseed single-layer carbon nano-tube in TMAOH and in the solution that obtains, FePt particle and single-layer carbon nano-tube were all electronegative on its surface, therefore because of its electrical charge rejection, can prevent the gathering of single-layer carbon nano-tube.The solution that has added single-layer carbon nano-tube is carried out the resulting suspension of ultrasonication, can stir by the whole bag of tricks, suitable is the magnetic stirring method, promptly, in suspension, put into magnetic stick, use the external magnetic field that magnetic stick is rotated and carry out stirring method.Single-layer carbon nano-tube can utilize any method synthetic basically, particularly, can utilize that for example laser ablation method, arc discharge method, catalytic chemical gaseous phase deposition (CCVD) method etc. are synthetic.
The single-layer carbon nano-tube application apparatus is so long as use the device of single-layer carbon nano-tube, no matter comprise all devices with regard to its purposes and function.Particularly, as the single-layer carbon nano-tube application apparatus, can list field emission element, field-effect transistor (FET) (also comprising thin film transistor (TFT)), single-electronic transistor, molecule sensor, solar cell, photo-electric conversion element, luminous element, holder, membrane electrode, transparency electrode etc.When making the single-layer carbon nano-tube application apparatus, the suspension that coating utilizes the manufacture method of above-mentioned single-layer carbon nano-tube to obtain on substrate for example, but be not limited thereto.
The invention effect
According to the present invention, the single-layer carbon nano-tube of boundlingization can be dispersed into one single-layer carbon nano-tube well, and can not sacrifice the length of single-layer carbon nano-tube inherent chemical property and the length after firm synthesizing.And, use this single-layer carbon nano-tube by single dispersive suspension, can produce various high performance single-layer carbon nano-tube application apparatus.
Description of drawings
Fig. 1 is that the drawing that is illustrated in the FePt nano particle that is dispersed among the embodiment 1 in the hexane, is dispersed to the single-layer carbon nano-tube in the water and is scattered in the transmission electron microscope picture of the single-layer carbon nano-tube in the TMAOH aqueous solution that is dispersed with the FePt nano particle substitutes photo.
Fig. 2 is the simple line chart of release mechanism that is used for illustrating the single-layer carbon nano-tube of embodiment 1.
Fig. 3 is illustrated in the CeO that is dispersed among the embodiment 1 in the hexane
2Nano particle is dispersed with CeO with being scattered in
2The drawing of the transmission electron microscope picture of the single-layer carbon nano-tube in the TMAOH aqueous solution of nano particle substitutes photo.
Fig. 4 be illustrated among the embodiment 1 single-layer carbon nano-tube that uses the FePt nano particle to peel off, be scattered in single-layer carbon nano-tube in the TMAOH aqueous solution, be scattered in the oleic acid single-layer carbon nano-tube and by CeO
2The simple line chart of the Raman spectrum of the single-layer carbon nano-tube of nanoparticulate dispersed.
The explanation of symbol
The 11:FePt nano particle
12: single-layer carbon nano-tube
Embodiment
Below, with reference to accompanying drawing an embodiment of the invention are described.
In an embodiment of the invention, at the CeO that is dispersed with FePt particle of nanometer size (hereinafter referred to as " FePt nano particle ") or nanometer size
2Particle is (hereinafter referred to as " CeO
2Nano particle ") the aqueous solution in add synthetic single-layer carbon nano-tube in advance.Then, ultrasonication is added with the aqueous solution of this single-layer carbon nano-tube, obtains uniform suspension.Then, magnetic stirs this suspension.By such operation, can prepare in suspension by single isolating single-layer carbon nano-tube.
＜embodiment 1 〉
Utilize the synthetic FePt nano particle of method (with reference to non-patent literature 21) of propositions such as Saita.That is, preparation has mixed the solution of following substances: 1mmol Fe (OEt)
3(ethanol iron (III)), 0.5mmol Pt (acac)
2(methyl ethyl diketone platinum (II)), 17mL octyl ether, 1.6mL oleic acid, 1.7mL oleyl amine.Then, the speed with 20 ℃/minute in argon gas atmosphere is warmed up to 297 ℃ with this solution, keeps under this temperature 30 minutes and makes Fe (OEt)
3And Pt (acac)
2Thermolysis.Obtain colloidal FePt nano particle thus with oleic acid/oleyl amine coating.Then, remove the octyl ether of this colloidal FePt nano grain surface and the solvent of the tensio-active agent that Song Song adheres to, collect the colloidal FePt nano particle that stays by cleaning a few hours with ethanol, in air with 40 ℃ of dryings.Obtain the FePt nano particle like this.The size of these FePt nano particles is 2～5nm, and the ratio of Fe/Pt is 65: 35.
With such synthetic FePt nanoparticulate dispersed in hexane.The TEM picture that is scattered in the FePt nano particle in the hexane is shown in a of Fig. 1.By a of Fig. 1 as can be known, these FePt nano particles are can be in hexane single and disperse equably.
Then, in the 2ml0.5%TMAOH aqueous solution (with reference to non-patent literature 22), disperse 0.5mg FePt nano particle, store as the FePt nanoparticles solution.
As single-layer carbon nano-tube, use the HiPco single-layer carbon nano-tube of buying from carbon nanotechnology company (Houston, Texas).In order to remove metal catalyst, at first with the HNO of this HiPco single-layer carbon nano-tube at 2.6M
3In refluxed 24 hours, carry out centrifugal, with washed with de-ionized water for several times up to the pH value near 7.With the throw out of gained in air with 70 ℃ of dryings.
Then, above-mentioned such 0.5mg single-layer carbon nano-tube of purifying is added in the FePt nanoparticles solution of storage.At first in as mild as a dove condition (50W, 43kHz) ultrasonication 30 minutes and obtain the suspension of black even down, use magnetic stirrer magnetic to stir then 12 hours in the mixture of gained.
The TEM picture of resulting single-layer carbon nano-tube is shown in the c and d of Fig. 1 when using the FePt nano particle to carry out ultrasonication and stirring like this.At this, the d of Fig. 1 is the high resolving power TEM picture of the c of Fig. 1.In order to compare, shown in the b of Fig. 1 in water the TEM picture of the single-layer carbon nano-tube of ultrasonication.Shown in the b of Fig. 1, the single-layer carbon nano-tube of ultrasonication is the rope form of remarkable boundlingization in water.In contrast, shown in the c and d of Fig. 1, clear and definite the single-layer carbon nano-tube of ultrasonication is mainly by being formed by the single single-layer carbon nano-tube of peeling off in the aqueous solution that is dispersed with the FePt nano particle as can be known, and its diameter is less than 2nm.In the c of Fig. 1, can observe some globular FePt nano particles attached to the single-layer carbon nano-tube surface.Used the dispersion of single-layer carbon nano-tube of FePt nano particle very even, can stably keep more than 4 months.FePt nano particle, TMAOH, oleic acid and oleyl amine show effect in dispersion system.In order to understand fully the mechanism of peeling off, use at not using the FePt nano particle TMAOH situation (a), use oleic situation (b), use the situation (c) of oleyl amine, carried out several control experiments under these conditions.All can't observe single-layer carbon nano-tube from the TEM picture in whole collating conditions significantly peels off.Can obtain such conclusion thus, that is, the FePt nano particle goes the overriding effect of boundling performance to single-layer carbon nano-tube.
In Fig. 2, schematically illustrate by will be scattered in that single-layer carbon nano-tube in the TMAOH aqueous solution that is dispersed with the FePt nano particle carries out that ultrasonication and stirring thereafter obtain by the form of single isolating single-layer carbon nano-tube.Shown in a of Fig. 2, in being dispersed with the TMAOH aqueous solution of FePt nano particle 11, disperse single-layer carbon nano-tube 12.Under this state, single-layer carbon nano-tube 12 boundlingizations.When this TMAOH aqueous solution of ultrasonication under the condition in gentleness, ultrasonic permeability is in the single-layer carbon nano-tube 12 of boundlingization, overcoming the inherent Van der Waals that works between single-layer carbon nano-tube 12 interacts, such shown in the b of Fig. 1, tube bank becomes thinner, that is, tube bank is made of the single-layer carbon nano-tube 12 of less amount.Simultaneously, FePt nano particle 11 becomes the state that is dispersed in well in the TMAOH aqueous solution by ultrasonication, and the narrow slit that this FePt nano particle 11 is penetrated in the tube bank is between single-layer carbon nano-tube 12 and the single-layer carbon nano-tube 12 in the formed slit.This FePt nano particle 11 also is penetrated in the portion of reporting to the leadship after accomplishing a task or joint part of single-layer carbon nano-tube 12 dearly.So, when under this state, carrying out gentle magnetic stir process, mechanical effect by the FePt nano particle 11 in the each several part that is penetrated into tube bank, boundlingization is stripped from and is gone fully to the single-layer carbon nano-tube 12 of boundlingization, like that, single-layer carbon nano-tube 12 is by single separation shown in the c of Fig. 1 for its result.The tested ζDian Shi value of making of single-layer carbon nano-tube 12 in the TMAOH aqueous solution and FePt nano particle 11 is respectively-61.04mV and-46.47mV.That is, single-layer carbon nano-tube 12 and FePt nano particle 11 are all with strong negative electricity.Therefore, because electrical charge rejection between single-layer carbon nano-tube 12 and the FePt nano particle 11, go the stability of the single-layer carbon nano-tube 12 of boundlingization to become better, by the anti-congregational rate that electrical charge rejection brought, can be in the TMAOH aqueous solution solution single-layer carbon nano-tube 12 be remained on single isolating state.
＜embodiment 2 〉
The synthetic CeO of the method (with reference to non-patent literature 23) of utilizing people of the present invention to propose
2Nano particle.These CeO
2Nano particle has size and the surface functional group same with the FePt nano particle of about 5nm.
Then, in the 2ml0.5%TMAOH aqueous solution, disperse O.5mg CeO similarly to Example 1
2Nano particle is as CeO
2Nanoparticles solution stores.
Then, similarly to Example 1 the 0.5mg single-layer carbon nano-tube of purifying is added to the CeO of storage
2In the nanoparticles solution.Then, similarly to Example 1 the mixture of gained is at first obtained the suspension of black even the following ultrasonication of condition (50W, 43kHz) as mild as a dove 30 minutes, use magnetic stirrer magnetic to stir then 12 hours.
Be scattered in the CeO in the hexane
2The TEM picture of nano particle is shown among a of Fig. 3.By a of Fig. 3 as can be known, CeO in this example
2Four or five of nano particles constitute a unit together, disperse unlike the FePt nano particle.Shown in the b of Fig. 3 to using CeO
2Nanoparticles solution is carried out the TEM picture of the single-layer carbon nano-tube after ultrasonication and the stirring thereafter.Shown in the b of Fig. 3, peel off effect and good unlike the FePt nano particle, but the thin tube bank (representing with thick arrow) that in image, can see a large amount of one single-layer carbon nano-tube (representing with thin arrow) and peel off.And then the tube bank of seriously being entangled with separately becomes scattered state.
The single-layer carbon nano-tube that Fig. 4 represents to adopt the method for embodiment 1 to use the FePt nano particle to peel off (curve a), be dispersed in single-layer carbon nano-tube (curve b) in the TMAOH aqueous solution, be dispersed in the single-layer carbon nano-tube (curve c) in the oleic acid and utilize CeO
2The Raman spectrum of these four samples of the single-layer carbon nano-tube of nanoparticulate dispersed (curve d).In Fig. 4, can be at 200～300cm
-1Observed RBM (RadialBreathing Mode, radially breathing pattern) comes from the thinner single-layer carbon nano-tube with 0.7～1.2nm diameter.At 185cm
-1Below do not determine RBM, can confirm in HiPco single-layer carbon nano-tube sample, not exist basically single-layer carbon nano-tube with the diameter more than the 1.3nm.Be scattered in single-layer carbon nano-tube in the TMAOH aqueous solution, utilize CeO
2The single-layer carbon nano-tube of nanoparticulate dispersed and utilize between the oleic acid dispersive single-layer carbon nano-tube and do not have clear and definite difference.Feature the most outstanding in Fig. 4 is: the RBM systematicness ground when single-layer carbon nano-tube is peeled off by the FePt nano particle is to the high frequency side displacement.This displacement to high frequency side is 3cm
-1About the size.Owing to do not see such feature in other three control experiments, therefore, people of the present invention think that this displacement to high frequency side is that the boundlingization of going of single-layer carbon nano-tube is brought.Another significant variation is 258cm
-1The RBM peak split into 2, an emerging peak position is in 262cm
-1Because the RBM frequency depends on the diameter of single-layer carbon nano-tube, therefore based on the computing method that makes the constant model of exerting oneself (with reference to non-patent literature 24), the diameter corresponding with this peak is about 0.903nm.The position and the intensity of the D band in four samples do not have difference, and peeling off effect and can not produce any influence to chemical results by the single-layer carbon nano-tube of FePt nano particle generation be described.About the G band, intensity increases in the sample of the single-layer carbon nano-tube of being peeled off by the FePt nano particle, and this mainly is because the single-layer carbon nano-tube of boundlingization is stripped from the many more increases that help whole G band strength more of one single-layer carbon nano-tube.
As mentioned above, according to this embodiment, be dispersed with FePt nano particle or CeO
2Add institute's synthetic single-layer carbon nano-tube in the aqueous solution of nano particle, after this aqueous solution of ultrasonication obtains uniform suspension, magnetic stirs this suspension, thus, even the single-layer carbon nano-tube boundlingization after just synthetic also can produce in suspension by single isolating single-layer carbon nano-tube.And, this single-layer carbon nano-tube can former state keep the inherent chemical property and just synthetic after the length of length.In addition, because single-layer carbon nano-tube disperses with single isolating state in suspension, the semiconductor monolayer carbon nanotube becomes easier with separating of metal single layer carbon nanotube.
To have the suspension of single-layer carbon nano-tube to be applied to substrate first-class by will this single separation, can make the various single-layer carbon nano-tube application apparatus such as FET that single-layer carbon nano-tube are used for channel material.Therefore this single-layer carbon nano-tube can realize high performance single-layer carbon nano-tube application apparatus owing to kept the inherent chemical property.In addition, also can realize utilizing energetically the single-layer carbon nano-tube application apparatus of the long single-layer carbon nano-tube acquisition of length.
More than, specifically understand an embodiment of the invention and embodiment, but the present invention is not limited to the above-described embodiment and examples, can carry out various distortion based on technological thought of the present invention.
For example, cited numerical value, raw material, operation etc. only illustrate in the above-described embodiment and examples, can also use the numerical value different with these, raw material, operation etc. as required.
Claims (5)
1. the manufacture method of a single-layer carbon nano-tube is characterized in that, this method possesses following steps:
In being dispersed with the FePt particulate aqueous solution of nanometer size, add the step of single-layer carbon nano-tube;
Ultrasonication has been added the described aqueous solution of described single-layer carbon nano-tube and has been obtained the step of suspension;
Stir the step of described suspension.
2. the manufacture method of single-layer carbon nano-tube according to claim 1 is characterized in that, described FePt particulate size is 2～5nm.
3. the manufacture method of single-layer carbon nano-tube according to claim 1 is characterized in that, the described aqueous solution is tetramethylammonium hydroxide aqueous solution.
4. the manufacture method of single-layer carbon nano-tube according to claim 1 is characterized in that, magnetic stirs described suspension.
5. the manufacture method of single-layer carbon nano-tube application apparatus is characterized in that, this method possesses following steps:
In being dispersed with the FePt particulate aqueous solution of nanometer size, add the step of single-layer carbon nano-tube;
Ultrasonication has been added the described aqueous solution of described single-layer carbon nano-tube and has been obtained the step of suspension;
Stir the step of described suspension.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007100800276A CN101259959B (en) | 2007-03-05 | 2007-03-05 | Manufacturing method and application of single-layer carbon nano-tube |
| JP2007310475A JP2008214177A (en) | 2007-03-05 | 2007-11-30 | Method for producing single layer carbon nanotube, and methohd for producing single layer carbon nanotube-applied device |
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| CN2007100800276A CN101259959B (en) | 2007-03-05 | 2007-03-05 | Manufacturing method and application of single-layer carbon nano-tube |
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| CN1709793A (en) * | 2005-04-18 | 2005-12-21 | 东华大学 | Method for preparing terbium oxide assembled carbon nano tube composite material |
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| JP4059795B2 (en) * | 2003-03-25 | 2008-03-12 | 富士通株式会社 | Carbon nanotube growth method |
| JP2004307334A (en) * | 2003-03-25 | 2004-11-04 | Mitsubishi Chemicals Corp | Carbon composition, composite material containing the same, and dispersing body |
| JP2007022875A (en) * | 2005-07-20 | 2007-02-01 | Toyota Motor Corp | Composite material and molded item using it |
| JP4834832B2 (en) * | 2005-09-02 | 2011-12-14 | 国立大学法人北海道大学 | Method for producing carbon nanotube dispersion |
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| Title |
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| Jin Zhu et al..Dispersing Carbon Nanotubes in Water: A Noncovalent and Nonorganic Way.J.Phys.Chem.B.2004,108(31),11317-11320. * |
| JP特开2003-301333A 2003.10.24 |
| 江琳沁 等.化学处理对碳纳米管分散性能的影响.无机材料学报.2003,18(5),1135-1138. |
| 江琳沁等.化学处理对碳纳米管分散性能的影响.无机材料学报.2003,18(5),1135-1138. * |
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| CN101259959A (en) | 2008-09-10 |
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