Influence of H2O molecules on sub-nanometre scale gaps between Au leads
Influence of H2O molecules on sub-nanometre scale gaps between Au leads
复制标题
H2O分子对Au引线之间亚纳米级间隙的影响
DOI：
10.1088/0957-4484/14/1/310
复制
发表时间：
2002
期刊：
影响因子：
3.5
通讯作者：
D. Davidović
中科院分区：
文献类型：
--
作者：
A. Korotkov;M. Bowman;H. McGuinness;D. Davidović
电场诱导的金表面改性用于在金引线之间产生稳定的亚纳米级间隙。电子隧道电流是作为分子环境的函数来测量的。我们探索水分子对隧道电导的影响。在小电压下，水分子不影响电导。在高电压下，引线之间的强静电场会捕获水蒸气中的 H2O 分子。在室温下，被捕获的水分子增加了隧道势垒高度，与水的功函数一致。我们估计，5 V 电压下单个被捕获水分子的电阻约为 100 GΩ。
Electric-field induced surface modification of Au is used to create stable sub-nanometre-scale gaps between Au leads. Electron tunnelling current is measured as a function of the molecular environment. We explore the influence of water molecules on tunnelling conductance. At small voltage, water molecules do not influence the conductance. At large voltage, a strong static electric field between the leads induces trapping of H2O molecules from the water vapour. At room temperature, trapped water molecules increase the tunnelling barrier height, in agreement with the workfunction of water. We estimate that the resistance of a single trapped water molecule at 5 V is of order 100 GΩ.
影响因子：
56.9
作者：
Bumm, LA;Arnold, JJ;Weiss, PS
通讯作者：
Weiss, PS