JP2006131428A - Carbon nanotube and method for manufacturing the same - Google Patents
Carbon nanotube and method for manufacturing the same Download PDFInfo
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- JP2006131428A JP2006131428A JP2004318870A JP2004318870A JP2006131428A JP 2006131428 A JP2006131428 A JP 2006131428A JP 2004318870 A JP2004318870 A JP 2004318870A JP 2004318870 A JP2004318870 A JP 2004318870A JP 2006131428 A JP2006131428 A JP 2006131428A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 55
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title abstract description 10
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 14
- 229910052737 gold Inorganic materials 0.000 claims description 13
- 239000010931 gold Substances 0.000 claims description 12
- 239000010419 fine particle Substances 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 230000007096 poisonous effect Effects 0.000 abstract 1
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical group CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 36
- 238000006243 chemical reaction Methods 0.000 description 19
- 239000002904 solvent Substances 0.000 description 8
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 4
- 239000012300 argon atmosphere Substances 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 125000001741 organic sulfur group Chemical group 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 125000004001 thioalkyl group Chemical group 0.000 description 3
- 125000003396 thiol group Chemical group [H]S* 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- -1 cyclic disulfides Chemical class 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000004434 sulfur atom Chemical group 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 1
- 0 C1*CSSC1 Chemical compound C1*CSSC1 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002048 multi walled nanotube Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 150000003378 silver Chemical group 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002109 single walled nanotube Substances 0.000 description 1
- 125000004354 sulfur functional group Chemical group 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Abstract
Description
本発明は、チオアルキルチオール基がその表面に結合しているカーボンナノチューブ及びその製造方法に関する。 The present invention relates to a carbon nanotube having a thioalkylthiol group bonded to its surface and a method for producing the same.
カーボンナノチューブは、燃料電池および電子部品分野をはじめとし、種々な分野で用いられている。このカーボンナノチューブの表面に各種の処理を施すことにより、電気的、物理的、化学的に優れた高機能特性を付加することができることが期待されている。このようなことから、より広範囲の分野での利用が期待されている材料である。
その一例として表面に化学修飾を施すことにより、より高付加価値を有する材料となることが期待される。化学修飾を施す場合に、従来から特異な特性を有する官能基を導入することにより付加価値を高めることができる。
Carbon nanotubes are used in various fields including fuel cells and electronic parts. It is expected that highly functional characteristics excellent in electrical, physical, and chemical properties can be added by performing various treatments on the surface of the carbon nanotube. For these reasons, the material is expected to be used in a wider range of fields.
As an example, it is expected that a material having higher added value can be obtained by chemically modifying the surface. When chemical modification is performed, the added value can be increased by introducing a functional group having unique characteristics.
一般に、有機硫黄官能基を有する材料は、硫黄原子や硫黄原子含有官能基特有の特異な性質を有し、金属原子、特に金原子や銀原子などと良い親和性を示して自己組織化することから広く用いられている材料である。 In general, a material having an organic sulfur functional group has unique properties unique to sulfur atoms or sulfur atom-containing functional groups, and exhibits a good affinity with metal atoms, particularly gold atoms or silver atoms, and self-organizes. It is a widely used material.
従来、カーボンナノチューブ表面上に硫黄官能基を導入する方法としては、（イ）硫化水素中におけるボールミリング法、及び（ロ）強酸を用いた酸化によってカルボシキル基を導入後、還元反応を経て塩化チオニルを作用させる方法（非特許文献１、２参照）が、知られている。
しかしながら、（イ）の方法において使用するガスは、取り扱いが困難である有毒ガスを使用する必要がある。このような特殊材料ガスを使用する場合、特別な反応容器が必要となり操作も煩雑となる。また、（ロ）の方法としては強酸でカーボンナノチューブを酸化させる必要があり、この反応によってカーボンナノチューブ上に多数の欠陥が導入されることから、カーボンナノチューブ本来の構造及び特性を失う可能性が考えられる。
Conventional methods for introducing a sulfur functional group onto the surface of a carbon nanotube include (i) ball milling in hydrogen sulfide, and (b) introduction of a carboxyl group by oxidation with a strong acid, followed by a reduction reaction and thionyl chloride. There is known a method of causing the effect to act (see Non-Patent Documents 1 and 2).
However, the gas used in the method (a) needs to use a toxic gas that is difficult to handle. When such a special material gas is used, a special reaction vessel is required and the operation becomes complicated. Also, as the method (b), it is necessary to oxidize the carbon nanotube with a strong acid, and this reaction introduces many defects on the carbon nanotube, so there is a possibility that the original structure and characteristics of the carbon nanotube may be lost. It is done.
本発明は、従来この種の方法に用いられてきた有毒ガスを使用することなく、カーボンナノチューブ本来の構造及び特性を失うことなく、安全、かつ簡便にカーボンナノチューブ表面上に有機硫黄官能基を導入する（結合した）カーボンナノチューブ及びその製造方法を提供することを目的とする。 The present invention introduces organic sulfur functional groups on the surface of carbon nanotubes safely and easily without losing the original structure and properties of carbon nanotubes without using toxic gases that have been used in this type of method. An object of the present invention is to provide (bonded) carbon nanotubes and a method for producing the same.
本発明者らは、紫外線照射下、カーボンナノチューブと環状ジスルフィドを反応させると、意外にも、カーボンナノチューブ表面上にチオアルキルチオール基が化学的に結合することを見いだし、本発明を完成するに至った。
すなわち、この出願によれば、以下の発明が提供される。
（１）チオアルキルチオール基がその表面に結合していることを特徴とするカーボンナノチューブ。
（２） チオアルキルチオール基の炭素数が３〜１０であることを特徴とする上記（１）に記載のカーボンナノチューブ。
（３） 紫外線照射下、カーボンナノチューブと下記一般式（１）で表される環状ジスルフィドを反応させることを特徴とする上記（１）又は（２）に記載のチオアルキルチオールがその表面に結合したカーボンナノチューブの製造方法。
（４） 有機溶媒中に環状ジスルフィドを添加することを特徴とする上記（３）又は（４）に記載のカーボンナノチューブの製造方法。
（５）上記（１）又は（２）に記載のカーボンナノチューブのチオアルキルチオール基を介して金微粒子が結合した金微粒子修飾カーボンナノチューブ。
The present inventors have unexpectedly found that when carbon nanotubes and cyclic disulfides are reacted under ultraviolet irradiation, a thioalkylthiol group is chemically bonded to the carbon nanotube surface, and the present invention has been completed. It was.
That is, according to this application, the following invention is provided.
(1) A carbon nanotube characterized in that a thioalkylthiol group is bonded to the surface thereof.
(2) The carbon nanotube as described in (1) above, wherein the thioalkylthiol group has 3 to 10 carbon atoms.
(3) The thioalkylthiol described in the above (1) or (2) is bonded to the surface thereof by reacting a carbon nanotube with a cyclic disulfide represented by the following general formula (1) under ultraviolet irradiation A method for producing carbon nanotubes.
(4) The method for producing carbon nanotubes as described in (3) or (4) above, wherein cyclic disulfide is added to the organic solvent.
(5) A gold fine particle modified carbon nanotube in which gold fine particles are bonded via the thioalkylthiol group of the carbon nanotube according to the above (1) or (2).
本発明に係る、カーボンナノチューブの表面上にチオアルキルチオール基が導入された（結合した）、カーボンナノチューブは新規物質であり、金属原子、特に金原子や銀原子などと良い親和性を示して自己組織化、抗菌特性等の機能を有し、電子デバイス、機能性材料、抗菌剤として極めて有用なものである。また、本発明の製造方法によれば、有毒ガスを使用することなく、常温の溶液中で紫外光照射をするだけの簡便な反応操作により、カーボンナノチューブ表面上にチオアルキルチオール基を導入した（結合した）、新規なカーボンナノチューブを得ることができる。 According to the present invention, a thioalkylthiol group is introduced (bonded) onto the surface of the carbon nanotube, and the carbon nanotube is a novel substance and exhibits a good affinity with a metal atom, particularly a gold atom or a silver atom. It has functions such as organization and antibacterial properties, and is extremely useful as an electronic device, functional material, and antibacterial agent. In addition, according to the production method of the present invention, a thioalkylthiol group was introduced onto the surface of a carbon nanotube by a simple reaction operation simply by irradiating ultraviolet light in a solution at room temperature without using a toxic gas ( New carbon nanotubes can be obtained.
本発明に係るカーボンナノチューブは、その表面にチオアルキルチオール基が結合していることを特徴としている。
このものは、概略的には下記一般式（２）で表すことができる。
This can be schematically represented by the following general formula (2).
原材料であるカーボンナノチューブとしては、単層あるいは多層の何れのものも使用することができる。 As the carbon nanotube as a raw material, either single-walled or multi-walled carbon nanotubes can be used.
チオアルキルチオール基は−Ｓ（ＣＨ２）ｎＳＨで示され、その炭素数が３〜１０、好ましくは、４〜９、更に好ましくは炭素数が４〜６のものである。 The thioalkylthiol group is represented by —S (CH 2 ) n SH, and has 3 to 10 carbon atoms, preferably 4 to 9 carbon atoms, and more preferably 4 to 6 carbon atoms.
本発明に係るカーボンナノチューブは、紫外線照射下、カーボンナノチューブと下記一般式（１）で示される環状ジスルフィドと反応させることによって製造することができる。
前記環状ジスルフィドの炭素数は、反応の簡便さ及び高機能性の発現という理由から３〜１０とする。好ましくは４〜９、より好ましくは４〜６である。
本発明方法の反応においては、これらの環状ジスルフィドの鎖長による反応性の差はない。
The number of carbon atoms of the cyclic disulfide is 3 to 10 because of the simplicity of the reaction and the expression of high functionality. Preferably it is 4-9, More preferably, it is 4-6.
In the reaction of the method of the present invention, there is no difference in reactivity due to the chain length of these cyclic disulfides.
本発明の方法では、前記一般式（１）で表される環状ジスルフィドの開裂反応によるラジカルの発生が必要であることから、このために紫外光照射下に行う。波長は２００ｎｍ〜３００ｎｍのものを使用することが望ましい。 In the method of the present invention, since generation of radicals by the cleavage reaction of the cyclic disulfide represented by the general formula (1) is necessary, this is performed under irradiation with ultraviolet light. It is desirable to use a wavelength of 200 nm to 300 nm.
光源としては公知のものが用いられ、低圧水銀灯、高圧水銀灯、ＡｒＦまたはＸｅＣｌエキシマレーザー、エキシマランプ等が適用でき、広範囲の波長の光を利用できる。
反応の高効率化のためには、２５４ｎｍ以下の波長を有する紫外光照射下に反応を行うことが好ましい。光量は、０．１〜１００ｍＷ／ｃｍ２の範囲で照射される。
照射時間は１〜８時間程度が必要である。
A known light source is used, and a low-pressure mercury lamp, a high-pressure mercury lamp, an ArF or XeCl excimer laser, an excimer lamp, or the like can be applied, and light having a wide wavelength range can be used.
In order to increase the efficiency of the reaction, the reaction is preferably performed under irradiation with ultraviolet light having a wavelength of 254 nm or less. The amount of light is irradiated in the range of 0.1 to 100 mW / cm 2 .
The irradiation time needs about 1 to 8 hours.
本発明の方法に際しては、原料物質である前記環状ジスルフィドを、溶媒中に添加するのが望ましい。推奨される溶媒は、アセトニトリルである。溶媒量は、環状ジスルフィドの使用量に応じて決定する。この反応原料を溶媒中に保存することができる量であれば差し支えないが、十分に溶媒中に混和することができ、かつ反応に際して光照射を十分に行うことができる量を必要とする。
このようなことを考慮して、環状ジスルフィド２．５ｍｇに対して、０．５ｍｌ以上、４ｍｌ以下のアセトニトリルを使用することが望ましい。
In the method of the present invention, it is desirable to add the cyclic disulfide as a raw material into a solvent. The recommended solvent is acetonitrile. The amount of solvent is determined according to the amount of cyclic disulfide used. Any amount can be used as long as the reaction raw material can be stored in the solvent, but an amount that can be sufficiently mixed in the solvent and can be sufficiently irradiated with light during the reaction is required.
In consideration of the above, it is desirable to use 0.5 ml or more and 4 ml or less of acetonitrile with respect to 2.5 mg of cyclic disulfide.
本発明の反応は、加熱する必要がなく、室温下で容易に進行させることができる。本発明の反応を行うにあたっては、アルゴンまたは窒素雰囲気を介して懸濁液に光照射を行うのが望ましい。 The reaction of the present invention does not need to be heated and can easily proceed at room temperature. In carrying out the reaction of the present invention, it is desirable to irradiate the suspension with light through an argon or nitrogen atmosphere.
また、本発明方法においては、反応終了後、溶媒を除去する。ついでカーボンナノチューブを溶剤により洗浄し、不必要な付着物を除去する。溶剤には前記アセトニトリルを用いることができる。
このようにして得られるチオアルキルチオール化カーボンナノチューブの同定は、表面に前記チオアルキルチオール基が化学結合しているかどうかを各種の分析機器たとえばＸＰＳなどを利用することにより行われる。
In the method of the present invention, the solvent is removed after completion of the reaction. Next, the carbon nanotubes are washed with a solvent to remove unnecessary deposits. As the solvent, acetonitrile can be used.
Identification of the thioalkylthiolated carbon nanotube thus obtained is performed by using various analytical instruments such as XPS to determine whether or not the thioalkylthiol group is chemically bonded to the surface.
上記カーボンナノチューブのチオアルキルチオール基を介して金微粒子が結合した金微粒子修飾カーボンナノチューブは、チオアルキルチオール化カーボンナノチューブと金微粒子溶液を反応させることにより得ることができる。
また、このものの同定は、前記と同様な各種の分析機器たとえばＸＰＳなどを利用することにより行われる。
The gold fine particle modified carbon nanotube in which the gold fine particle is bonded through the thioalkylthiol group of the carbon nanotube can be obtained by reacting the thioalkylthiolated carbon nanotube with the gold fine particle solution.
In addition, this is identified by using various analytical instruments similar to those described above, such as XPS.
以下、実施例により本発明を更に詳細に説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
実施例１
合成石英製の反応容器に、六員環ジスルフィド（５ｍｇ）をアセトニトリル（４ｍｌ）に溶解させ、カーボンナノチューブを入れた。
アルゴン雰囲気下で攪拌しつつ低圧水銀灯を室温で７時間照射した。その後、アセトニトリル溶液を除去し、カーボンナノチューブをアセトニトリルで洗浄し、減圧下で乾燥を行った。
反応後のカーボンナノチューブのＸＰＳ測定を行った。図１に示すように、硫黄に由来するピークが観測され、表面上にチオブチルチオール基（ＨＳＣＨ２ＣＨ２ＣＨ２ＣＨ２Ｓ−）が導入されたことが確認された。
実施例２
Example 1
Six-membered ring disulfide (5 mg) was dissolved in acetonitrile (4 ml) in a reaction vessel made of synthetic quartz, and carbon nanotubes were placed therein.
While stirring in an argon atmosphere, a low-pressure mercury lamp was irradiated for 7 hours at room temperature. Thereafter, the acetonitrile solution was removed, the carbon nanotubes were washed with acetonitrile, and dried under reduced pressure.
The XPS measurement of the carbon nanotube after reaction was performed. As shown in FIG. 1, a peak derived from sulfur was observed, and it was confirmed that a thiobutylthiol group (HSCH 2 CH 2 CH 2 CH 2 S—) was introduced on the surface.
Example 2
合成石英製の反応容器に、七員環ジスルフィド（２ｍｇ）をアセトニトリル（４ｍｌ）に溶解させ、カーボンナノチューブを入れた。
アルゴン雰囲気下で攪拌しつつ低圧水銀灯を室温で７時間照射した。その後、アセトニトリル溶液を除去し、カーボンナノチューブをアセトニトリルで洗浄し、減圧下で乾燥を行った。
反応後のカーボンナノチューブのＸＰＳ測定を行った。図２に示すように、硫黄に由来するピークが観測され、表面上に表面上にチオペンチルチオール基（ＨＳＣＨ２ＣＨ２ＣＨ２ＣＨ２ＣＨ２Ｓ−）が導入されたことが確認された。
実施例３
In a reaction vessel made of synthetic quartz, seven-membered ring disulfide (2 mg) was dissolved in acetonitrile (4 ml), and carbon nanotubes were placed.
While stirring in an argon atmosphere, a low-pressure mercury lamp was irradiated for 7 hours at room temperature. Thereafter, the acetonitrile solution was removed, the carbon nanotubes were washed with acetonitrile, and dried under reduced pressure.
The XPS measurement of the carbon nanotube after reaction was performed. As shown in FIG. 2, a peak derived from sulfur was observed, and it was confirmed that a thiopentylthiol group (HSCH 2 CH 2 CH 2 CH 2 CH 2 S—) was introduced on the surface.
Example 3
合成石英製の反応容器に、八員環ジスルフィド（２ｍｇ）をアセトニトリル（４ｍｌ）に溶解させ、カーボンナノチューブを入れた。
アルゴン雰囲気下で攪拌しつつ低圧水銀灯を室温で７時間照射した。その後、アセトニトリル溶液を除去し、カーボンナノチューブをアセトニトリルで洗浄し、減圧下で乾燥を行った。
反応後のカーボンナノチューブのＸＰＳ測定を行った。図３に示すように、硫黄に由来するピークが観測され、表面上に表面上に表面上にチオヘキシルチオール基（ＨＳＣＨ２ＣＨ２ＣＨ２ＣＨ２ＣＨ２ＣＨ２Ｓ−）が導入されたことが確認された。有機硫黄官能基が導入されたことが確認された。
実施例４
In a reaction vessel made of synthetic quartz, eight-membered ring disulfide (2 mg) was dissolved in acetonitrile (4 ml), and carbon nanotubes were placed.
While stirring in an argon atmosphere, a low-pressure mercury lamp was irradiated for 7 hours at room temperature. Thereafter, the acetonitrile solution was removed, the carbon nanotubes were washed with acetonitrile, and dried under reduced pressure.
The XPS measurement of the carbon nanotube after reaction was performed. As shown in FIG. 3, a peak derived from sulfur was observed, and a thiohexylthiol group (HSCH 2 CH 2 CH 2 CH 2 CH 2 CH 2 S—) was introduced on the surface. Was confirmed. It was confirmed that an organic sulfur functional group was introduced.
Example 4
実施例１で得たカーボンナノチューブ（１．７ｍｇ）を水中に懸濁させ、金微粒子溶液（５ｍｌ）を加えて終夜攪拌した。その後、水溶液を除去し、カーボンナノチューブを水およびエタノールで洗浄し、減圧下に乾燥を行って金微粒子修飾カーボンナノチューブを得た。反応後の該微粒子修飾カーボンナノチューブのＸＰＳ測定を行った。図４に示すように、硫黄に由来するピークと金に由来するピークが観測され、表面上にＡｕ−ＳＣＨ２ＣＨ２ＣＨ２ＣＨ２Ｓ−基を介して金微粒子が導入されたことが確認された。 The carbon nanotubes (1.7 mg) obtained in Example 1 were suspended in water, a gold fine particle solution (5 ml) was added, and the mixture was stirred overnight. Thereafter, the aqueous solution was removed, the carbon nanotubes were washed with water and ethanol, and dried under reduced pressure to obtain gold fine particle modified carbon nanotubes. The XPS measurement of the fine particle-modified carbon nanotube after the reaction was performed. As shown in FIG. 4, a peak derived from sulfur and a peak derived from gold were observed, and it was confirmed that gold fine particles were introduced on the surface via Au—SCH 2 CH 2 CH 2 CH 2 S— groups. It was done.
Claims (5)
A gold fine particle-modified carbon nanotube in which gold fine particles are bonded via a thioalkylthiol group of the carbon nanotube according to claim 1 or 2.
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