Title :
Computational design of FIB-milled nanostructures for use in biosensing
Author :
Gerhold, M. ; Dhawan, A. ; Tuan Vo-Dinh
Author_Institution :
U. S. Army Res. Office, Durham, NC
Abstract :
This research describes theoretical and experimental evaluations of electromagnetic fields around ordered arrangements of gold and silver nano-pillars. Finite difference time domain method is employed in simulating the periodic arrangements of nano-pillars having different geometries. Metallic nanostructures are developed using the focused ion beam (FIB) milling process. These structures are also fabricated on gold-coated tips of four mode and multimode silica optical fibers. Enhancements in surface enhanced Raman scattering signals are monitored in the experimental evaluation of nanopillars. These FIB-milled nanostructures show practical use for biosensing applications.
Keywords :
biological techniques; finite difference time-domain analysis; focused ion beam technology; gold; milling; nanostructured materials; nanotechnology; optical fibres; silicon compounds; silver; surface enhanced Raman scattering; Ag; Au; FIB-milled nanostructures; SiO2; biosensing; finite difference time domain method; focused ion beam milling; four mode optical fibers; gold nanopillars; gold-coated tips; metallic nanostructures; multimode optical fibers; silica optical fibers; silver nanopillars; surface enhanced Raman scattering; Electromagnetic fields; Finite difference methods; Geometry; Nanobioscience; Nanostructures; Sensors; Time domain analysis;
Conference_Titel :
IEEE/LEOS Summer Topical Meetings, 2008 Digest of the
Conference_Location :
Acapulco
Print_ISBN :
978-1-4244-1925-8
DOI :
10.1109/LEOSST.2008.4590490
