Molecular rectification in a metal-insulator-metal junction based on self-assembled monolayers
作者： Michael L. Chabinyc , Xiaoxi Chen , R. Erik Holmlin , Heiko Jacobs , Hjalti Skulason
DOI: 10.1021/JA020506C
关键词:
摘要: An electrical junction formed by mechanical contact between two self-assembled monolayers (SAMs)--a SAM from an dialkyl disulfide with a covalently linked tetracyanoquinodimethane group that is supported silver (or gold) and alkanethiolate mercury-rectifies current. The precursor to the on was bis(20-(2-((2,5-cyclohexadiene-1,4-diylidene)dimalonitrile))decyl)) for mercury HS(CH(2))(n-1)CH(3) (n = 14, 16, 18). properties of junctions were characterized current-voltage measurements. ratio conductivity in forward bias (Hg cathodic) reverse anodic), at potential 1 V, 9 +/- 2 when derived HS(CH(2))(15)CH(3). increased decreasing chain length alkanethiol used form mercury. These results demonstrate single redox center asymmetrically placed metal-insulator-metal can cause rectification current indicate fixed dipole insulating region not required rectification.
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