Electronic Current Transport through Molecular Monolayers: Comparison between Hg/Alkoxy and Alkyl Monolayer/Si(100) Junctions

Autor: Eric Salomon, Oliver Seitz, Hagai Cohen, David Cahen, Florent Thieblemont, Antoine Kahn, Ayelet Vilan
Rok vydání: 2008
Předmět:
Zdroj: Advanced Materials. 20:3931-3936
ISSN: 1521-4095
0935-9648
DOI: 10.1002/adma.200800659
Popis: Self-assembled monolayers (SAMs) of organic molecules can serve to incorporate (bio)chemical functionalities at metal, dielectric, and semiconductor surfaces, as well as to passivate those surfaces. Possible technological applications of these layers include chemical and biological sensors, molecular electronics, and solar cells. Grafting SAMs on oxide-free silicon is of interest because, apart from the obvious advantages of using Si as substrate, the absence of an oxide interlayer, the thickness and quality of which is not easy to control especially after SAM deposition, simplifies the interpretation of many measurements, especially electronic current transport ones. To realize the abovementioned goals, it is of interest to synthesize monolayers with functional groups in addition to the one used for binding to the substrate, e.g., a group at the side of the molecule away from the surface. A proven way to achieve monolayers of high quality for transport measurements is to react alkenes with a hydrogen-terminated Si surface. However, if we want to get functionalized monolayers, the use of the alkenes can be problematic because the terminal double bond may react with the functional group of another molecule instead of carrying out its intended reaction with the surface. Instead, the use of
Databáze: OpenAIRE
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