Electronic functionalization of the surface of organic semiconductors with self-assembled monolayers

被引：186
作者：
Calhoun, M. F. [1 ]
Sanchez, J. [1 ]
Olaya, D. [1 ]
Gershenson, M. E. [1 ]
Podzorov, V. [1 ]
机构：
[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
来源：
NATURE MATERIALS | 2008年 / 7卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1038/nmat2059
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Self-assembled monolayers (SAMs) are widely used in a variety of emerging applications for surface modification of metals and oxides. Here, we demonstrate a new type of molecular self-assembly: the growth of organosilane SAMs at the surface of organic semiconductors. Remarkably, SAM growth results in a pronounced increase of the surface conductivity of organic materials, which can be very large for SAMs with a strong electron-withdrawing ability. For example, the conductivity induced by perfluorinated alkyl silanes in organic molecular crystals approaches 10(-5) S per square, two orders of magnitude greater than the maximum conductivity typically achieved in organic field-effect transistors. The observed large electronic effect opens new opportunities for nanoscale surface functionalization of organic semiconductors with molecular self-assembly. In particular, SAM-induced conductivity shows sensitivity to different molecular species present in the environment, which makes this system very attractive for chemical sensing applications.
引用
收藏
页码：84 / 89
页数：6
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