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Alkanethiol Mediated Release of Surface Bound Nanoparticles Fabricated by Nanosphere Lithography

Published online by Cambridge University Press:  01 February 2011

Jing Zhao ,
Amanda J Haes ,
Xiaoyu Zhang ,
Shengli Zou ,
Erin M Hicks ,
George C Schatz  and
Richard P Van Duyne
Jing Zhao
Affiliation:
[email protected], Northwestern University, Chemistry, 2145 Sheridan Road, Evanston, IL, 60201, United States, 847-491-2952
Amanda J Haes
Affiliation:
[email protected], Naval Research Laboratory, United States
Xiaoyu Zhang
Affiliation:
[email protected], Northwestern University, Chemistry, United States
Shengli Zou
Affiliation:
[email protected], Northwestern University, Chemistry, United States
Erin M Hicks
Affiliation:
[email protected], Northwestern University, Chemistry, United States
George C Schatz
Affiliation:
[email protected], Northwestern University, Chemistry, United States
Richard P Van Duyne
Affiliation:
[email protected], Northwestern University, Chemistry, United States
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Abstract

This work presents an innovative approach to produce monodisperse solution-phase triangular silver nanoparticles with well-controlled geometry. Ag nanotriangles are fabricated by nanosphere lithography (NSL), functionalized with alkanethiol molecules and then released from the substrate into solution. The resulting single isolated nanoparticles are subsequently asymmetrically functionalized with alkanedithiol molecules to form dimer pairs. The optical properties of the Ag nanoparticles have been measured using UV-Vis spectroscopy while their structural properties have been characterized using atomic force microscopy (AFM) and transmission electron microscopy (TEM). Theoretical calculations based on Mie theory and the Discrete Dipole Approximation (DDA) method have been done to interpret the optical properties of the released Ag nanoparticles.

Keywords

nanostructureoptical propertiessimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O13-08
Copyright
Copyright © Materials Research Society 2006

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