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PHYSICAL PROPERTY OF MOLECULARJ3EVICE CONNECTED WITH INSULATED MOLECULAR WIRES

与绝缘分子线连接的MOLECULARJ3EVICE的物理特性

基本信息

批准号：
12838005
负责人：
SHIMOMURA Takeshi
金额：
$ 2.56万
依托单位：
THE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12838005/
关键词：
CONDUCTING POLYMER CONJUGATED CONDUCTING POLYMER INSULATED MOLECULAR WIRE MOLECULAR WIRE SUPRAMOLECULE INCLUSION COMPLEX ATOMIC FORCE MICROSCOPY NANOTECHNOLOGY

项目摘要

We have recently found a novel kind of molecular wire formed by the molecular nanotube synthesized from cyclodextrins (CDs) and a conducting polymer, polyaniline (PANI), and observed the structure of the insulated molecular wire by atomic force microscopy (AFM). This inclusion complex can be regarded as insulated molecular wire, because a conducting polymer is covered by CD molecules as insulator. In this study, we aim to make a molecular device using a single insulated molecular wire as a material for the connection between the external electrodes.For a molecular device connected by the insulated molecular wire, we have successfully made SiO_2 substrates with two electrodes (the gap bewtween electrodes is ca. 500 nm) by AFM lithography. Firstly, we deposited the carbon nanotube to bridge the gap between electrodes on the substrate and measured the resistivity between two electrodes to confirm the quality of the substrate with electrodes. It was found that the resistivity of ca. 100 kΩ measured was dominantly ascribable to the contact resistivity between the electrode and the carbon nanotube. Although we now try to deposit the insulated molecular wire to bridge the gap between electrodes now, the intrinsic conductivity of the molecule is difficult to measure with high accuracy in this system if the resistivity of the insulated molecular wire is smaller than the contact resistivity. Thus, we plan to synthesize PANI with thiol at the both ends to contact well to electrodes.Since it is expected that the doped insulated molecular wire had high conductivity, it can be great candidate of the molecular wire for the molecular device.

最近，我们发现了一种由环糊精（CD）和导电聚合物聚苯胺（PANI）合成的分子纳米管形成的新型分子线，并利用原子力显微镜（AFM）观察了绝缘分子线的结构。这种包合物可以看作是绝缘的分子线，因为导电聚合物被CD分子作为绝缘体覆盖。本研究的目的是利用单根绝缘分子线作为外电极连接材料，制作分子器件，对于绝缘分子线连接的分子器件，我们成功地制作了具有两个电极的SiO_2基片（电极之间的差距约为100 nm）。500 nm）。首先，我们在基板上沉积碳纳米管来桥接电极间的差距，并测量两个电极间的电阻率以确认具有电极的基板的质量。结果表明，Ca。100 kΩ的测量值主要归因于电极与碳纳米管之间的接触电阻率。尽管我们现在尝试存款绝缘分子线来桥接电极之间的差距，但如果绝缘分子线的电阻率小于接触电阻率，则在该系统中难以高精度地测量分子的固有电导率。因此，我们计划合成两端带有巯基的聚苯胺，使其与电极有良好的接触，并期望掺杂绝缘分子线具有高的导电性，可以作为分子器件的分子线的候选材料。