Journal
LANGMUIR
Volume 16, Issue 8, Pages 3846-3851Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la991356v
Keywords
-
Ask authors/readers for more resources
This paper provides a convenient method for fabricating architectures of Au nanoparticles on solid substrate,with precise position and density control. Our strategy is to modify Au substrate with self-assembled monolayers (SAMs) terminated with different functional groups. They were chosen to be -CH3/-NH2 or -CH3/-SH according to their affinities to Au nanoparticle. Au nanoparticles assemble selectively on -NH2 or -SH terminated locations, the -NH2 functional group binding electrostatically to the nanoparticles whereas the -SH groups bonding chemically. The SAMs, acting as guiding templates for Au nanoparticles, were fabricated by the microcontact printing (mu CP) technique. A patterned or unpatterned SAM was prepared by using patterned or unpatterned poly(dimethyl)siloxane (PDMS) stamp, respectively. The coverage of -CH3 terminated SAM in the contact region is controlled by changing the concentration of ink solution for the stamp. After immersing the printed SAM into -SH or -NH2 thiol solutions for 2 h, a mixed SAM with a predetermined coverage of -SH or -NH2 was formed in the contact regions, and a pure -SH or -NH2 SAM was formed in the intervening area. The position and density of nanoparticles on the surface were determined by the distribution of the underlying functional groups.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available