Substrates for combined surface-enhanced Raman spectroscopy and photon tunneling measurements

Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1991

OSTI ID:6923197

Sharp, S L

Imaging and certain spectroscopic capabilities of the photon scanning tunneling microscope (PSTM) are reported for laser sources at different wavelengths in the visible spectrum. The results yield PSTM images of silver microstructures and surface enhanced Raman spectra of benzoic acid and cobalt pthalocyanine acquired by the PSTM for these microstructures. Three types of samples are studied: photoresist gratings, silver-coated gratings, and isolated silver particles. PSTM images of all three types of sample and presented. Results of using a conventional lens system and spectrometer show that both the silver-coated gratings and isolate particles are good samples for surface enhanced Raman spectroscopy (SERS). SERS data acquired by the PSTM/spectrometer system for these samples show that sufficiently intense spectra are obtained to unambiguously identify the target compounds. This research provides a basis for further work to determine if the PSTM can be an effective tool for topographical chemical mapping.

• Research Organization: Tennessee Univ., Knoxville, TN (United States)
• OSTI ID: 6923197
• Country of Publication: United States
• Language: English

Related Subjects

664200 -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
665000* -- Physics of Condensed Matter-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BENZOIC ACID
CARBOXYLIC ACIDS
COBALT COMPOUNDS
ELEMENTS
LASER SPECTROSCOPY
METALS
MICROSCOPY
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SILVER
SPECTRA
SPECTROSCOPY
SUBSTRATES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNNEL EFFECT