Black-CuO: surface-enhanced Raman scattering and infrared properties

作者：Balcytis Armandas^*; Ryu Meguya; Seniutinas Gediminas; Juodkazyte Jurga; Cowie Bruce C C; Stoddart Paul R; Zamengo Massimiliano; Morikawa Junko; Juodkazis Saulus

来源：Nanoscale, 2015, 7(43): 18299-18304.

DOI：10.1039/c5nr04783h

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 -104 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 mu m in wavelength). Sensing applications and thermal effects in SERS are discussed.

• 出版日期2015