Vapor phase preparation of carbon nanocoils and the characterization

碳纳米线圈的气相制备及其表征

• 批准号: 13555171
• 负责人: MOTOJIMA Seiji
• 金额: $ 8.51万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555171/
• 关键词: Carbon nanocoils; Chemical vapor deposition; Carbon microcoils; Vapor grown carbon fiber; Catalyst

1)Preparation conditions of carbon nanocoils (CNC) were examined in detail.(1)The Fe-Ni (10%) and Pd/Pt catalysts supported on molecular Sieves or Al_2O_3 fine powder were the most effective catalysts for the mass production of CNC. (2)The single coils was obtained with high purity using SUS304 metal catalyst which was rubbed on the quartz substrate.2)The morphology, fine structure and growth mechanism of CNC were examined.(1)I was observed that the carbon nanocoils with a coil diameter below several ten nm has mainly twisted-form, and spring-like nanocoils could not be obtained in a large amount. (2)Nanocoils was mainly a single coil and the growth mechanism was proposed. (3)The nanocoils have higher crystallinity than that of microcoils. (4)Changing coiling-chirality through a piece of coil was sometimes observed, and the changing mechanism was proposed. (5)The flat coils with flat fiber cross section, those were obtained with applying outer electromagnetic or magnetic waves, were obtained, and the growth mechanism was proposed.3)Mechanical, electro-magnetic, tactile sensing and hydrogen absorption properties were examined.(1)The elasticity of the coils wasdecreased by high temperature heat-treatment (2)CNC/PMMA composites absorbed above -20dB the electromagnetic waves of 10-110GHz. (3)CNC/elastic resin show high tactile sensing properties with very high sensing and high discrimination properties. (4)The high hydrogen absorption properties was obtained by disordered CNC.

1)详细考察了碳纳米线圈的制备条件。（1）以分子筛或Al_2O_3细粉为载体的Fe-Ni（10%）和Pd/Pt催化剂对CNC的批量生产是最有效的催化剂。（2）采用SUS 304金属催化剂在石英衬底上摩擦，获得了高纯度的单线圈。(1)I观察到线圈直径低于几十nm的碳纳米线圈主要具有扭曲形式，并且不能大量获得弹簧状纳米线圈。（2）纳米螺旋主要为单螺旋，并提出了其生长机理。（3）纳米线圈比微线圈具有更高的结晶度。（4）有时观察到通过一片螺旋改变螺旋手性，并提出了改变螺旋手性的机理。（5）通过外加电磁波或磁场，得到了具有扁平纤维截面的扁平线圈，并提出了其生长机理。（3）研究了其力学性能、电磁性能、触觉传感性能和吸氢性能。（2）CNC/PMMA复合材料对10- 110 GHz电磁波的吸收大于-20dB。（3）CNC/弹性树脂显示出高触觉传感特性，具有非常高的传感和高辨别特性。（4）无序CNC具有较高的吸氢性能。

项目成果

M.Fujii, M.Matsui, S.Motojima, Y.Hishikawa: "Magnetoresistance in carbon micro-coils annealed at various temperatures."J.Cryst.Growth. 237-239. 1937-1941 (2002)

M.Fujii、M.Matsui、S.Motojima、Y.Hishikawa：“在不同温度下退火的碳微线圈中的磁阻。”J.Cryst.Growth。

S.Yang, X.Chen, S.Motojima, H.Iwanaga: "The phenomenon of changing coiling-chirality in carbon nanocoils obtained by catalytic pyrolysis of acetylene with various catalysts."J.Nanosci.Nanotechn.. 4(1/2). 167-175 (2004)

S.Yang，X.Chen，S.Motojima，H.Iwanaga：“通过各种催化剂催化热解乙炔获得的碳纳米线圈中卷曲手性的变化现象。”J.Nanosci.Nanotechn.. 4(1/2)

S.Motojima, K.Kuzuya, S.Yang, X.Chen, T.Hashishin, H.Iwanaga, S.Shimada, H.Saito, N.Yoshikawa, T.Awaji, K.Watanabe.: "Vapor phase preparation of carbon microcoils and nanocoils under concerted amplification of high magnetic field and their properties."Ele

S.Motojima、K.Kuzuya、S.Yang、X.Chen、T.Hashishin、H.Iwanaga、S.Shimada、H.Saito、N.Yoshikawa、T.Awaji、K.Watanabe.：“气相制备

C.Kuzuya, M.Kohda, Y.Hishikawa, S.Motojima.: "Preparation of carbon and inner electromagnetic fields and bias voltage."Carbon. 40. 1991-2001 (2002)

C.Kuzuya，M.Kohda，Y.Hishikawa，S.Motojima.：“碳和内部电磁场和偏置电压的制备。”碳。

S.Yang, X.Chen, S.Motojima: "Coiling-chirality changing of carbon microcoils obtained by catalyzed pyrolysis of acetylene and its mechanism"Appl. Phys. Lett.. 81(19). 3567-3569 (2002)

S.Yang，X.Chen，S.Motojima：“乙炔催化热解获得的碳微线圈的卷曲手性变化及其机理”Appl。