Near-infrared surface-enhanced Raman spectroscopy. Part II: Copper and gold colloids
Near-infrared (NIR) surface-enhanced Raman spectra (SERS) on copper and gold metal colloids were obtained with a Fourier transform Raman spectrometer using a Nd:YAG laser (1.064 ..mu..m) for excitation. Enhanced spectra were observed for pyridine and 3-chloropyridine (CP) on copper colloids and for tris(orthophenanthroline)ruthenium(II), Ru(o-phen)/sup 2 +//sub 3/, on copper and gold colloids. The copper-colloid surface-enhanced Raman spectra of pyridine and CP were compared with spectra measured for these molecules on copper electrodes. NIR-SERS enhancements on the metal colloids were at least as large as for visible-wavelength excited SERS. Good-quality spectra of Ru(o-phen)/sup 2 +//sub 3/ were obtained at solution concentrations as low as 0.025 mM.
- Research Organization:
- Environmental Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550 (S.M.A., L.F.K.); nd Department of Chemistry BG-10, University of Washington, Seattle, Washington 98195 (D.D.A., D.E.H.)(US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5926920
- Journal Information:
- Appl. Spectrosc.; (United States), Vol. 43:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER
RAMAN EFFECT
GOLD
PYRIDINE
RAMAN SPECTRA
PYRIDINES
RUTHENIUM COMPLEXES
COLLOIDS
DNA
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
MEASURING METHODS
NEAR INFRARED RADIATION
SURFACE PROPERTIES
AZINES
COMPLEXES
DATA
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
HETEROCYCLIC COMPOUNDS
INFORMATION
INFRARED RADIATION
MEASURING INSTRUMENTS
METALS
NUCLEIC ACIDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RADIATIONS
SPECTRA
SPECTROMETERS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
360603* - Materials- Properties