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Gold surface with gold nitride–a surface enhanced Raman scattering active substrate

Brieva, A.C. and Alves, Luis and Krishnamurthy, Satheesh and Siller, Lidija (2009) Gold surface with gold nitride–a surface enhanced Raman scattering active substrate. Journal of Applied Physics, 105 (5). ISSN 1089-7550

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Abstract

The nitration of gold surfaces is a nonpolluting method, which can lead to large scale production of substrates with remarkable properties and applications. We present a topographical study of the nanoscale structure of the gold nitride surfaces produced by radio frequency (rf) nitrogen plasma etching of thin gold films. Atomic force microscopy images taken after rf etching reveal the striking appearance of the cluster assembly with large clusters surrounded by small clusters (7.9±1.4 and 2.3±0.9 nm, respectively) appearing to exhibit an attractive interaction. We discuss the possible mechanism for this attraction based on a colloid model by Messina et al. [Phys. Rev. Lett. 85, 872 (2000) ]. This surface exhibits a notable surface enhanced Raman scattering effect demonstrated with L-alanine and rhodamine-6G. The significance of this work is that we found that this SERS active gold nitride surface can be prepared in just one step: by nitrogen plasma etching a thin gold film. Until now most SERS active gold cluster covered surfaces have been prepared in several steps very often requiring complex lithography.

Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:atomic force microscopy; colloids; gold compounds; lithography; sputter etching; surface enhanced Raman scattering; surface topography;
Subjects:Physical Sciences > Thin films
Physical Sciences > Optoelectronics
Physical Sciences > Physics
Physical Sciences > Nanotechnology
Physical Sciences > Photonics
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:American Institute of Physics
Official URL:http://dx.doi.org/10.1063/1.3082871
Copyright Information:Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
ID Code:15352
Deposited On:14 Apr 2010 11:04 by Satheesh Krishnamurthy. Last Modified 14 Apr 2010 11:04

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