Black-CuO: surface-enhanced Raman scattering and infrared properties.
Large surface area samples of nanotextured black CuO were prepared by chemical etching of Cu for use in surface-enhanced Raman scattering (SERS). The SERS intensity of a self-assembled monolayer (SAM) of thiophenol was proportional to the thickness of a nanoscale-conformal Au film deposited by magnetron sputtering over the black CuO. A very high SERS yield of ∼10(4) counts per s per mW was observed for the thiophenol SAM on the thickest Au films studied here. Synchrotron X-ray photoelectron spectroscopy was used to confirm that the surface of the chemically etched Cu was covered by high purity CuO. IR spectral characterization of the black CuO showed a close to linear increase in reflectivity from 25 to 100% over the range of 4000-500 cm(-1) wavenumbers (or 2.5-20 μm in wavelength). Sensing applications and thermal effects in SERS are discussed.
Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia. abalcytis@swin.edu.au and Center for Physical Sciences and Technology, A. Goštauto 9, LT-01108 Vilnius, Lithuania.
Armandas
A
Balčytis
Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
Meguya
M
Ryu
Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia. abalcytis@swin.edu.au.
Gediminas
G
Seniutinas
Center for Physical Sciences and Technology, A. Goštauto 9, LT-01108 Vilnius, Lithuania.
Jurga
J
Juodkazytė
Australian Synchrotron, 800 Blackburn Rd., Clayton, VIC 3168, Australia.
Bruce C C
BC
Cowie
Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia. abalcytis@swin.edu.au.
Paul R
PR
Stoddart
Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
Massimiliano
M
Zamengo
Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
Junko
J
Morikawa
Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia. abalcytis@swin.edu.au and Center for Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Saulius
S
Juodkazis