[20p-W242-1~16] 12.1 Fabrications and Structure Controls

[20p-W242-4] High-coverage colloidal film formation of mid-nanometer-sized gold particles capped with mixed alkanthiolate SAMs

〇Kenji Sakamoto¹, Ung Thi Dieu Thuy², Satoko Nishiyama¹, Sayaka Yanagida¹, Nguyen Quang Liem², Kazushi Miki^1,3 (1.NIMS, 2.IMS-VAST, 3.Tsukuba Univ)

Keywords:gold nano-particles,mixed alkanethiol self-assembled monolayer,two-dimensional arrays

High coverage two-dimensional (2D) arrays of gold nano-particles (AuNPs) smaller than 10 nm in size can easily be formed by covering their surfaces with a single alkanethiol self-assembled monolayer (SAM). However, it becomes difficult for AuNPs larger than 10 nm in size, because of their colloidal dispersion instability. This problem is resolved by forming a mixed alkanethiol SAM on AuNP surfaces. In this presentation, we will report the relationship between the composition ratio of the mixed SAMs and the coverage of Au colloidal films.