引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1237次   下载 514 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Dielectric Properties of Self-assembled Monolayers of Dithiols
Jiang-long Luo* ,Chen Xia
Author NameAffiliation
Jiang-long Luo* College of Science, Jiujiang University, Jiujiang 332005, China; 
Chen Xia Structure Research Laboratory,University of Science and Technology of China, Hefei 230026, China 
Abstract:
Dielectric properties of dithiol self-assemble monolayers (SAMs) under ac electric field were presented. Using a Hg-SAM/SAM-Hg junction, the ac impedances of dithiol SAMs were measured using a sinusoidal perturba- tion of 30 mV (peak-to-peak) with the frequency ranging from 1 Hz to 1 MHz at zero bias. The contributions from dithiol SAMs and solvent interlayers were separated due to their different behaviors at ac impedance. The peak position in the loss spectra (the plot of tg± vs: frequency) moves to low frequency with the increase of chain length of dithiols. Using a correlation of peak position with the chain length, the active energies of 23-39 meV for dithiol SAMs of C6-C10 under an ac electric field were derived.
Key words:  Dithiol self-assembled monolayers, AC impedance, Loss spectra
FundProject:
自组装双硫醇分子膜阻抗谱的研究
罗江龙 ,夏晨
摘要:
对交流电场下双巯基烷烃硫醇自组装分子膜的阻抗谱进行了研究. 利用汞金属作为衬底,制备出双巯基烷烃硫醇自组装分子膜,并通过交流频谱仪对其进行频谱的扫描. 明确了膜的作用范围为阻抗谱中频部分. 为了解释该阻抗谱,提出了一种串联的等效电路来进行了拟合,并与其他的模型进行比较. 同时,观察到在损耗谱中损耗峰随硫醇碳链原子数的增加而向低频方向移动并得出双巯基硫醇(C6?C10)在交流电场下的激活能为23?39 meV.
关键词:  双硫醇自组装单分子膜, 交流阻抗谱, 损耗谱
DOI:10.1360/cjcp2006.19(6).515.4
分类号: