Porous Three Dimensional Arrays of Plasmonic Nanoparticles

Singh, Haobijam Johnson and Ghosh, Ambarish (2012) Porous Three Dimensional Arrays of Plasmonic Nanoparticles. In: JOURNAL OF PHYSICAL CHEMISTRY C, 116 (36). pp. 19467-19471.

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Abstract

Plasmonic interactions in a well-defined array of metallic nanoparticles can lead to interesting optical effects, such as local electric field enhancement and shifts in the extinction spectra, which are of interest in diverse technological applications, including those pertaining to biochemical sensing and photonic circuitry. Here, we report on a single-step wafer scale fabrication of a three-dimensional array of metallic nanoparticles whose sizes and separations can be easily controlled to be anywhere between fifty to a few hundred nanometers, allowing the optical response of the system to be tailored with great control in the visible region of the spectrum. The substrates, apart from having a large surface area, are inherently porous and therefore suitable for optical sensing applications, such as surface enhanced Raman scattering, containing a high density of spots with enhanced local electric fields arising from plasmonic couplings.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICAL CHEMISTRY C
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copyright for this article belongs to the American Chemical Society
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Jan 2013 09:13
Last Modified:	11 Jan 2013 09:13
URI:	http://eprints.iisc.ac.in/id/eprint/45272

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