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Title: Metal-dielectric-CNT nanowires for surface-enhanced Raman spectroscopy

A sensor with a substrate includes nanowires extending vertically from the substrate, a hafnia coating on the nanowires that provides hafnia coated nanowires, and a noble metal coating on the hafnia coated nanowires. The top of the hafnia and noble metal coated nanowires bent onto one another to create a canopy forest structure. There are numerous randomly arranged holes that let through scattered light. The many points of contact, hot spots, amplify signals. The methods include the steps of providing a Raman spectroscopy substrate, introducing nano crystals to the Raman spectroscopy substrate, growing a forest of nanowires from the nano crystals on the Raman spectroscopy substrate, coating the nanowires with hafnia providing hafnia coated nanowires, and coating the hafnia coated nanowires with a noble metal or other metal.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1397253
Assignee:
Lawrence Livermore National Security, LLC LLNL
Patent Number(s):
9,778,197
Application Number:
14/450,633
Contract Number:
AC52-07NA27344
Resource Relation:
Patent File Date: 2014 Aug 04
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY

Works referenced in this record:

Metal-Dielectric-CNT Nanowires for Femtomolar Chemical Detection by Surface Enhanced Raman Spectroscopy
journal, May 2013
  • Altun, Ali Ozhan; Youn, Seul Ki; Yazdani, Nuri
  • Advanced Materials, Vol. 25, Issue 32, p. 4431-4436
  • DOI: 10.1002/adma.201300571