2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Face Selective Adhesion of Gold Nanoparticles onto microcrystal of Cyclodextrin/Octanethiol Inclusion Compound Produced by Magnetron Sputtering

L. Barrientos, J. Merchán, N. Yutronic and P. Jara
Universidad de Chile, Doctorant Student, CL

Keywords:
gold nanoparticles, selective assembly, magnetron sputtering

Abstract:
This work describes the self-assembly of stable gold nanoparticles (AuNPs) on microcrystal faces of cyclodextrin inclusion compound ( CD-IC). giving as result a supramolecular arrangement (Fig. 1). That was obtained by means of magnetron sputtering technique. Comparison of 13C CP-MAS NMR spectra for pure CD-IC with those for CD-IC interacting with AuNPs evidenced different orientation of the guest into the channels of the matrix of CD. The UV-Vis spectrum, recorded in diffuse reflection, revealed a maximum extinction around 525nm assignable to the plasmon band of aggregated AuNPs. SEM images proved the homogeneity of the sample as well as the expected spherical shape of the AuNPs and preferential deposition of these AuNPs on determined crystal faces. TEM images show that the obtained AuNPs average size is 2.6 nm.

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