Chattopadhyay, Sudeshna and Mukherjee, Rabibrata and Datta, Alokmay and Saha, Abhijit and Sharma, Ashutosh and Kulkarni, Giridhar U. (2009) Self-Assembly of a Two-Dimensional Au-Nanocluster Superlattice and Its Photoluminescence Spectra. Journal of Nanoscience and Nanotechnology , 9 (1). pp. 190-194. ISSN 1533-4880

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A solution of dodecanethiol-capped Au nanoparticles (diameter similar to 2 nm), prepared through reduction of hydrogen tetrachloroaurate, was coated on a patterned cross-linked polydimethylsiloxane (PDMS) film (thickness >= 1 mu m) comprising array of square pillars, by either spin- or dip coating. Drying in ambient conditions for about 5 days resulted in the self-assembly of a superlattice (300 nm x 300 nm x 90 nm) of monodisperse nanoparticle clusters for the dip-coated samples, the clusters occupying the interstitial locations between four adjacent pillars on the polymer surface. Initial patterning of the PDMS is found to give rise to new photoluminescence bands in the near ultraviolet and visible regions, which the nanoclusters quench.

Item Type: Article
Uncontrolled Keywords: Self-Assembly; Mesoscopic Superlattice; Au Nanoclusters; Polysiloxanes; Atomic Force Microscopy
Subjects: Microstructure and Characterization
Depositing User: Ashok K Podder
Date Deposited: 22 Feb 2012 06:01
Last Modified: 06 Apr 2016 05:16

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