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Alkylthiol Self-Assembled Monolayers on Au(111) With Tailored Tail Groups for Attaching Gold Nanoparticles

Alkylthiol Self-Assembled Monolayers on Au(111) With Tailored Tail Groups for Attaching Gold Nanoparticles

V Y Kutsenko, Y Y Lopatina, L Bossard-Giannesini, O A Marchenko, O Pluchery, S V Snegir

Nanotechnology. 2017 Jun 9;28(23):235603.

PMID: 28508771

Abstract:

Self-assembled monolayers (SAMs) on Au(111) are able to control the functionality of a gold surface. We use scanning tunnelling microscopy (STM) in air and contact angle measurements to compare the morphology and the chemistry of three alkylthiol SAMs differing by their tail groups: 1,9-nonanedithiol (NDT), 1,4-butanedithiol (BDT) and 11-mercaptoundecanol (MUOH). STM reveals very different morphologies: a hexagonal lattice for MUOH and parallel rows for NDT and BDT. In the case of NDT, we find that the thiol tail groups may form disulfide bridges with long immersion times. The availability of the -SH group for chemical reactions is demonstrated by attaching gold nanoparticles (AuNPs). When the thiol tail group is available, AuNPs readily attach as shown with atomic force microscopy (AFM). When disulfide bridges are formed, the gold surface is not able to bind nanoparticles.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1191088	1,4-Butanedithiol		1191-08-8	Price

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