Distance dependence of surface-enhanced resonance Raman enhancement in Langmuir-Blodgett dye multilayers

1986 ◽  
Vol 90 (23) ◽  
pp. 6071-6073 ◽  
Author(s):  
T. M. Cotton ◽  
R. A. Uphaus ◽  
D. Mobius
Keyword(s):  
Resonance Raman ◽  
Langmuir Blodgett ◽  
Raman Enhancement ◽  
Surface Enhanced ◽  
Distance Dependence

Single-Molecule Detection Using Surface-Enhanced Resonance Raman Scattering and Langmuir−Blodgett Monolayers

2001 ◽  
Vol 73 (15) ◽  
pp. 3674-3678 ◽  
Author(s):  
Carlos J. L. Constantino ◽  
Tibebe Lemma ◽  
Patricia A. Antunes ◽  
Ricardo Aroca
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Resonance Raman ◽  
Single Molecule Detection ◽  
Resonance Raman Scattering ◽  
Langmuir Blodgett ◽  
Surface Enhanced

Surface-Enhanced Resonance Raman Scattering: Single-Molecule Detection in a Langmuir—Blodgett Monolayer

2003 ◽  
Vol 57 (6) ◽  
pp. 649-654 ◽  
Author(s):  
Carlos J. L. Constantino ◽  
Tibebe Lemma ◽  
Patricia A. Antunes ◽  
Paul Goulet ◽  
Ricardo Aroca
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Arachidic Acid ◽  
Resonance Raman ◽  
Single Molecule Detection ◽  
Resonance Raman Scattering ◽  
Surface Enhanced Fluorescence ◽  
Langmuir Blodgett ◽  
Spatially Resolved ◽  
Surface Enhanced

Surface-enhanced resonance Raman scattering (SERRS) is used for single-molecule detection from spatially resolved 1-μm2 sections of a Langmuir–Blodgett (LB) monolayer deposited onto a Ag film. The target molecule, bis (benzimidazo) thioperylene (BZP), is dispersed in an arachidic acid monomolecular layer containing one BZP molecule per μm2, which is also the probing area of the Raman microscope. For concentrated samples (attomole quantities in the field of view), average SERRS, surface-enhanced fluorescence (SEF), and Raman imaging, including line mapping and global images at different temperatures, were recorded. Single-molecule SERRS spectra, obtained using an LB monolayer, present changes in bandwidth and relative intensities, highlighting the properties of single-molecule SERRS that are lost in average SERRS measurements of mixed LB monolayers obtained at the same temperatures. Also, the dilute system phenomenon of blinking is discussed with regard to results obtained from LB monolayers. The dilution process used in the single-molecule LB SERRS work is independently supported by fluorescence results obtained from very dilute solutions with monomer concentrations down to 10−12 M.

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