Alkanethiol self-assembled monolayers as the dielectric of capacitors with nanoscale thickness

被引：269
作者：
Rampi, MA
Schueller, OJA
Whitesides, GM
机构：
[1] Univ Ferrara, Dipartmento Chim, CNR, Ctr Fotochim, I-44100 Ferrara, Italy
[2] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA
来源：
APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 14期
关键词：
D O I：
10.1063/1.121183
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Alkanethiol self-assembled monolayers (SAMs) on a mercury surface are used to build a junction consisting of two opposing mercury surfaces with interposed SAMs: Hg-SAM/SAM-Hg. The liquid mercury surface provides a support for the SAM that is smooth, compliant, foe of defects, and without the incommensurate lattice properties that characterize solid metal surfaces. The thickness of the dielectric (similar to 30-90 Angstrom) in this junction can be easily changed by using alkanethiols with different lengths. From capacitance measurements, a dielectric constant of 2.7+/-0.3 is calculated for the SAMs. The conductivity of SAMs on the Hg surface is sigma=6+/-2 X 10(-15) Omega(-1) cm(-1), a value close to that of bulk polyethylene. The junction sustains an electric field of 6 MV/cm. (C) 1998 American Institute of Physics. [S0003-6951(98)03114-3].
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页码：1781 / 1783
页数：3
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