Investigation on the Pyrazine Molecular Junction Studied by Conductance Measurement and Near Edge X-ray Absorption Fine Structure
Investigation on the Pyrazine Molecular Junction Studied by Conductance Measurement and Near Edge X-ray Absorption Fine Structure
复制标题
电导测量和近边X射线吸收精细结构研究吡嗪分子结
DOI：
10.1080/1536383x.2013.798723
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Manabu Kiguchi
中科院分区：
文献类型：
--
作者：
Satoshi Kaneko;Manabu Kiguchi
在10 K温度下，利用机械可控断裂结（MCBJ）技术研究了吡嗪分子结.电导测量结果表明，单吡嗪分子结具有两个不同的电导值，分别为0.27 ± 0.04和1.0 ± 0.2G_0（2 e ~ 2/h）。单个吡嗪分子结的电导值与金属原子结的电导值相当。用近边X射线吸收精细结构（NEXAFS）研究了吡嗪分子与铂表面的界面。N-K边NEXAFS谱中π* 峰的展宽表明吡嗪分子通过一个氮原子与Pt表面相连。基于电导和NEXAFS的测量，我们提出了吡嗪单分子结两种不同电导态的结构模型。
A pyrazine molecular junction was investigated using mechanically controllable break junction (MCBJ) technique at 10 K. The conductance measurements revealed the single pyrazine molecular junctions showed two distinct conductance values of 0.27 ± 0.04 and 1.0 ± 0.2G0(2e2/h). The conductance value of the single pyrazine molecular junction was comparable with that of the metal atomic junction. The interface between pyrazine molecule and Pt surface was investigated by near edge X-ray absorption fine structure (NEXAFS). The broadening of the π* peak in N K-edge NEXAFS spectra suggested that the pyrazine molecule connected to Pt surface via a nitrogen atom. Based on the measurements of the conductance and NEXAFS, we could propose the structural models of two distinct conductance states for the single pyrazine molecular junction.