Enhancement of electric field and Raman scattering by Ag coated Ni nanotips
- 22 August 2011
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 99 (8), 081909
- https://doi.org/10.1063/1.3627164
Abstract
Localization and enhancement of electric field by Ag-coated vertical Ni nanotip arrays were studied by using finite-different time domain calculations. With the 30 nm thick Ag coating, the nanotips can localize and enhance the electric field to more than 103 times under the excitation of TE-polarized light with a 532 nm wavelength. Nanotip-enhanced Raman scattering of cytochrome-c protein was demonstrated in a confocal Raman microscope. Significant enhancement of Raman spectrum was achieved at 1 × 10−9 mol/l concentration of the proteins.This publication has 12 references indexed in Scilit:
- Surface Plasmons and SingularitiesNano Letters, 2010
- Meep: A flexible free-software package for electromagnetic simulations by the FDTD methodComputer Physics Communications, 2010
- Manipulating Nanoscale Light Fields with the Asymmetric Bowtie Nano-ColorsorterNano Letters, 2009
- Plasmonic Enhancement of Fluorescence and Raman Scattering by Metal NanotipsNanoBiotechnology, 2007
- Surface Plasmons on Metal Nanoparticles: The Influence of Shape and Physical EnvironmentThe Journal of Physical Chemistry C, 2007
- Optical Properties of Star-Shaped Gold NanoparticlesNano Letters, 2006
- Aligned silver nanorod arrays produce high sensitivity surface-enhanced Raman spectroscopy substratesApplied Physics Letters, 2005
- β -phase tungsten nanorod formation by oblique-angle sputter depositionApplied Physics Letters, 2003
- Photoinduced Conversion of Silver Nanospheres to NanoprismsScience, 2001
- Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman ScatteringScience, 1997