Fabrication and Application of Carbon Nanotube Probes

碳纳米管探针的制备及应用

• 批准号: 16510080
• 负责人: TANG Jie
• 金额: $ 2.43万
• 依托单位: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16510080/
• 关键词: Carbon Nan tubes; dielectrophoresis; AFM probes based on CNTs; CNTs assembly; CNTs fibrils; STM probes based on CNTs; point electron sources; field emission property; 希土類ホウ化物ナノワイヤ; 原子力間走査型顕微鏡用探針; 高輝度冷電子エミッター; カーボンナノチューブチープ; 原子間力走査型顕微鏡用短針

The unique geometry and novel properties of nanotubes and nanorods make them attractive building blocks for new functional materials and devices. Recent experiments have demonstrated their potentials as high-resolution microscopy probes, conducting fibers, and high performance composite fillers. Although considerable progress has been made in the synthesis of nanostructured materials, development in this field in general is hindered by the lack of bottom-up manufacturing processes that can efficiently assemble functional structures and devices using these nanostructured building blocks.We have developed a dielectrophoresic technique to manipulate, align and assemble one-dimensional nanostructures using an alternating-current (AC) electric field in this project. Pre-formed carbon nanotubes (CNTs) dispersed in water are assembled into micro-electrodes and sub-micron diameter fibrils with variable lengths from〜1 μm to more than 1 cm. The CNTs within the fibril are bonded by van der Waals … More forces and are aligned along the fibril axis. This method affords a fine control of the fibril length and is capable of parallel fabrication of many fibrils using the same source. The short CNT fibrils can potentially be used as the probes for scanning probe microscopes and the long ones as electrodes and conducting wires.This method is reliable and has a high throughput for fabrication of CNT-based atomic force microscope (AFM) probes to measure fine structures on the nanometer scale. The process to fabricate carbon nanotube probes with high reproducibility and simple profile control has been long sought because of the difficulty of profile control, low reproducibility and the difficulty of manufacturing process in the currently available technologies. The carbon nanotube probes (detection needles) are assembled at high success rate using a dielectrophoresic method developed in this research. The successful fabrication of such nanotube probes advances the AFM technique in several fronts, for example, the horizontal resolution is improved, and the service life of AFM probes is greatly increased. This method can also potentially be used for processes of parallel fabrication of probes from carbon nanotubes as well as other nanostructures.Carbon nanotube point electron field emitters with controllable dimension were also assembled by the same dielectrophoresic method using processed nanotubes. The electron field emission characteristics were investigated using point-plane geometry at 5x10^<-7> Torr base pressure. A stable emission current of more than 3 μA (10^5A/cm^2) was extracted from a 50 nm diameter CNT emitter with no current decay over 10 hours at 100% duty cycle. The emitters are mechanically rigid. The dielectrophoresic method enables rapid and re-producible fabrication of CNT tips which can potentially be used as field emission point electron sources for precision vacuum electronic instruments. Less

纳米管和纳米棒的独特几何形状和新型特性使它们为新功能材料和设备提供了吸引人的基础。最近的实验证明了它们的潜力是高分辨率显微镜问题，进行纤维和高性能复合填充剂。尽管在纳米结构材料的合成中取得了长足的进步，但通常缺乏自下而上的制造过程，可以有效地使用这些纳米结构的构建块组装功能结构和设备来阻碍，我们已经开发了一种介电摄影技术来操纵，校准和组装一二维的NANANIDERIDER，以此（以这种方式）进行ac efternitiver（这些型号）。分散在水中的预先形成的碳纳米管（CNT）被组装成微电极中，并以〜1μm至超过1 cm的长度可变长度的亚微米直径纤维。原纤维内的CNT由范德华（Van der Waals）键合……更多的力，并沿着原纤维轴对齐。该方法可以很好地控制原纤维长度，并能够使用相同的来源平行制造许多原纤维。短的CNT纤维可以可能用作扫描探针显微镜的探针，而长的探针作为电子和导线。该方法是可靠的，并且具有高吞吐量，用于制造基于CNT的原子力显微镜（AFM）问题，以测量纳米尺度上的精细结构。由于轮廓控制的难度，低可重现性和当前可用技术的制造过程的难度，因此长期觉得具有高可重现性和简单概况控制的碳纳米管探针的过程具有很长的意义。碳纳米管探针（检测针）是使用本研究中开发的介电性方法以高成功率组装的。例如，这种纳米管探针的成功制造在几个方面推进了AFM技术，例如，水平分辨率得到了改善，并且AFM探针的使用寿命大大提高。该方法还可以可能用于碳纳米管和其他纳米结构的探针平行制造的过程。使用加工纳米管的碳纳米管点电子场发射器具有控制尺寸的碳纳米管点电子场发射器。使用点平面几何形状在5x10^<-7> Torr碱基压力下研究了电子场的发射特性。从直径50 nm的CNT发射极中提取出3μA（10^5a/cm^2）的稳定发射电流，在100％占空比的情况下没有电流衰减，而占用效率为10小时。发射器在机械上是刚性的。 Dieeleclectroprolosic方法可以快速且可重复可实现的CNT尖端制造，这些尖端有可能用作精确真空电子仪器的现场发射点电子源。较少的

项目成果

Efficient synthesis of single-crystalline Na2Ti6O13 nanoribbons

单晶Na2Ti6O13纳米带的高效合成

• 发表时间: 2006
• 期刊: Journal of Functional Materials 37(Suppl)
• 作者: C.Y.Xu;L.Zhen;Q.Zhang;L.Yang;J.Tang;L.-C.Qin
• 通讯作者: L.-C.Qin

The Phase Transition of CuCrZrS4 at High Pressure

CuCrZrS4 在高压下的相变

• 发表时间: 2005
• 期刊: Physica B
• 影响因子: 2.8
• 作者: Y.Nakamoto;T.Matsuokab;T.Kagayama;K.Shimizu;J.Tang;T.Kikegawa
• 通讯作者: T.Kikegawa

Rapid and reproducible fabrication of carbon nanotube AFM probes by dielectrophoresis

• DOI: 10.1021/nl048803y
• 发表时间: 2005-01-01
• 期刊: NANO LETTERS
• 影响因子: 10.8
• 作者: Tang, J;Yang, G;Zhou, O
• 通讯作者: Zhou, O

Controlled assembly of carbon nanotube fibrils by dielectrophoresis

通过介电泳控制碳纳米管原纤维的组装

• 发表时间: 2004
• 期刊: Materials Research Society Symposium Proceedings 788
• 作者: J.Tang;G.Yang;J.Zhang;H.Z.Geng;B.Bao;O.Velev;L.-C.Qin;O.Zhou
• 通讯作者: O.Zhou

高純度・一軸配列ナノチューブ長尺ファイバと作製方法

高纯度单轴取向纳米管长纤维及其制造方法

• 发表时间: 2006