Molecular Assemblies on Silicon via Silicon-Carbon Covalent Bonds

通过硅碳共价键在硅上进行分子组装

基本信息

批准号：
15310096
负责人：
TADA Hirokazu
金额：
$ 10.05万
依托单位：
Osaka University (2005)Institute for Molecular Science (2004)Okazaki National Research Institutes (2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

Much attention is being denoted to the study on molecular-scale electronic devices. While the molecules having a S atom at the terminal are widely used to construct a two-terminal device with Au electrodes, the interface of Au-S has not been well characterized. Instead of the Au-S system, molecules covalently bound to silicon are thought to be a potential candidate to provide a stable interface for carrier injection into molecules. The advantages of the molecules/semiconductor system are as follows : (a) the interface is thermally and chemically stable, (b) the electric properties can be controlled by doping electron-donating or -withdrawing impurities, and (c) micro- and nano-fabrication techniques established in the field of semiconductor devices are applicable. We have prepared molecular assemblies on silicon via chemical reaction between molecules having double bonds at the terminal and hydrogen-terminated silicon and studied reaction mechanism and stability by attenuated total ref … More lectance infrared (ATR-IR) spectroscopy and atomic force microscopy (AFM). In this work, we have demonstrated the following results : (1) alkyl-chains on silicon have an all-trans conformation ; (2) monolayers prepared in diluted 1-alkene were identical with that prepared in neat 1-alkene ; and (3) the rate of reaction between 1-alkene and hydrogen-terminated silicon remarkably depended on the concentration of 1-alkene. We have prepared a monolayer of dye molecules on silicon through anchoring molecules. The intensity of luminescence from the molecules on silicon was found to be strongly affected by the impurity concentration of silicon wafers used. We have also demonstrated that the silicon AFM cantilevers covered with organic molecules are available for friction-force microscopy and non-contact AFM in air as well as in ultrahigh vacuum. It has been shown that the cantilevers covered with organic monolayers via covalent bonds are useful for chemical force microscopy with contact and non-contact modes AFM in various atmospheres since the interface between molecules and cantilevers is thermally and chemically stable. Less

关于分子尺度电子设备的研究，人们非常关注。虽然分子在末端的S原子被广泛用于用Au电子构建两端设备，但Au-S的界面尚未得到很好的表征。与硅的共价分子而不是AU-S系统，被认为是为载体注入分子提供稳定界面的潜在候选者。分子/半导体系统的优势如下：（a）界面是热和化学稳定的，（b）可以通过掺杂电子掺杂或 - 绘制的杂质以及（C）微型和纳米制作技术来控制电气性能。我们已经通过在末端和氢终止硅的双键分子之间的化学反应制备了分子组件，并通过减弱的总参考资料和稳定性的总参考……更多的可传播红外（ATR-IR）光谱（ATR-IR）光谱和原子力显微镜（AFM）。在这项工作中，我们证明了以下结果：（1）硅上的烷基链具有全反式构象；（2）在稀释的1-烷烯中制备的单层与在整洁的1-烷烃中制备的单层相同；（3）1-烷烯和氢终止硅之间的反应速率显着取决于1-烷烯的浓度。已经通过锚定分子在硅上制备了染料分子的单层。发现硅上的分子发光强度受到所用硅波的杂质浓度的强烈影响。我们还证明，在空气中以及超高真空中，可用于摩擦力显微镜和非接触式AFM覆盖的硅AFM悬臂。已经表明，通过共价键覆盖的有机单层的悬臂可用于与各种大气中的接触和非接触模式AFM的化学力显微镜，因为分子和悬臂之间的界面是热和化学稳定的。较少的