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Metal‐Dielectric‐CNT Nanowires for Femtomolar Chemical Detection by Surface Enhanced Raman Spectroscopy
Author(s) -
Altun Ali Ozhan,
Youn Seul Ki,
Yazdani Nuri,
Bond Tiziana,
Park Hyung Gyu
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201300571
Subject(s) - materials science , surface enhanced raman spectroscopy , raman spectroscopy , nanotechnology , hafnia , substrate (aquarium) , dielectric , plasmon , carbon nanotube , nanowire , spectroscopy , raman scattering , optoelectronics , optics , cubic zirconia , ceramic , oceanography , physics , composite material , geology , quantum mechanics
A highly sensitive substrate for surface enhanced Raman spectroscopy (SERS) is formed by arrays of gold‐coated metallic carbon nanotubes having a nanoinsert of high‐ k dielectric (hafnia) as an energy coupling barrier. Repeated femtomolar detection of 1,2 bis‐(4‐pyridyl)‐ethylene in solution demonstrates the critical contribution of this plasmonic energy coupling barrier to the enhanced chemical sensitivity.