Surface-Enhanced Resonance Raman Scattering and Density Functional Calculations of Hemicyanine Adsorbed on Colloidal Silver Surface

2006 ◽  
Vol 110 (5) ◽  
pp. 1805-1811 ◽  
Author(s):  
N. Biswas ◽  
S. Thomas ◽  
S. Kapoor ◽  
A. Mishra ◽  
S. Wategaonkar ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Resonance Raman ◽  
Colloidal Silver ◽  
Resonance Raman Scattering ◽  
Silver Surface ◽  
Surface Enhanced

A density functional theory and resonance Raman study of a benzotriazole dye used in surface enhanced resonance Raman scattering

2006 ◽  
Vol 789 (1-3) ◽  
pp. 59-70 ◽  
Author(s):  
Prokopis C. Andrikopoulos ◽  
Karen M. McCarney ◽  
David R. Armstrong ◽  
Rachael E. Littleford ◽  
Duncan Graham ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Raman Scattering ◽  
Density Functional ◽  
Resonance Raman ◽  
Resonance Raman Scattering ◽  
Functional Theory ◽  
Surface Enhanced ◽  
Raman Study

Quantitative Assessment of Surface-Enhanced Resonance Raman Scattering for the Analysis of Dyes on Colloidal Silver

1999 ◽  
Vol 71 (3) ◽  
pp. 596-601 ◽  
Author(s):  
Joanna C. Jones ◽  
Clare McLaughlin ◽  
David Littlejohn ◽  
Daran A. Sadler ◽  
Duncan Graham ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Quantitative Assessment ◽  
Resonance Raman ◽  
Colloidal Silver ◽  
Resonance Raman Scattering ◽  
Surface Enhanced

Remote Detection Using Surface-Enhanced Resonance Raman Scattering

2002 ◽  
Vol 56 (7) ◽  
pp. 820-826 ◽  
Author(s):  
Ailie McCabe ◽  
W. Ewen Smith ◽  
Grant Thomson ◽  
David Batchelder ◽  
Richard Lacey ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Resonance Raman ◽  
Surface Adhesion ◽  
Resonance Raman Scattering ◽  
Silver Surface ◽  
Accumulation Time ◽  
Good Surface ◽  
Surface Enhanced ◽  
One Year ◽  
Probe Head

Surface-enhanced resonance Raman scattering (SERRS) provides intense Raman signals that are shown here to be stable in a target and to be detectable at least 10 meters from the spectrometer. The results indicate that SERRS labeling of objects and their detection at a distance with a low-power laser is feasible. Rhodamine and a dye specifically designed to give good surface adhesion, [4(5′-azobenzotriazyl)-3,5-dimethoxyphenylamine] (ABT DMOPA), were adsorbed onto silver particles and the particles dispersed in poly(vinyl acetate) (PVA) and varnish. SERRS from rhodamine was not detected from colloid dispersed either in PVA or varnish, presumably due to displacement of the dye from the silver surface. ABT DMOPA gave good SERRS. Maps of the SERRS intensity of films indicated variability of 10–20% if ultrasound was applied to improve dispersion during mixing. Scattering performance was evaluated using a system with the sample held up to one meter from the probe head. The intensity of the scattering from samples kept in the dark showed little change over a period of up to one year. However, when the samples were left in direct sunlight, the scattering intensity dropped significantly over the same period but could still be determined after eight months. An optical system was designed and constructed to detect scattering at longer distances. It consisted of a probe head based on a telephoto or CCTV lens that was fiber-optically coupled to the spectrometer. Effective detection of SERRS was obtained 10 m from the spectrometer using 3.6 mW of power and a 20 s accumulation time.

Approach to Single Molecule Detection Using Surface-Enhanced Resonance Raman Scattering (SERRS): A Study Using Rhodamine 6G on Colloidal Silver

1995 ◽  
Vol 49 (6) ◽  
pp. 780-784 ◽  
Author(s):  
Katrin Kneipp ◽  
Yang Wang ◽  
Ramachandra R. Dasari ◽  
Michael S. Feld
Keyword(s):  
Raman Scattering ◽  
Single Molecule ◽  
Rhodamine 6G ◽  
Detection System ◽  
Resonance Raman ◽  
Single Molecule Detection ◽  
Colloidal Silver ◽  
Fiber Optic Probe ◽  
Resonance Raman Scattering ◽  
Surface Enhanced

We have measured surface-enhanced resonance Raman scattering (SERRS) spectra of rhodamine 6G (R6G) at concentrations as low as 8 × 10−16 M in colloidal silver solution activated by NaCl ions. The spectra were measured with a fiber-optic probe using the 514.5-nm argon-ion laser line as excitation source and a charge-coupled-device (CCD) detection system. The correlation of SERRS photo counts and R6G concentration was found to be linear between 8 × 10−11 and 8 × 10−14 M concentrations within our experimental accuracy. Experiments conducted with small scattering volumes show that fewer than 100 R6G molecules are sufficient to give rise to a SERRS spectrum with reasonable signal-to-noise ratio. These results demonstrate that in certain cases SERRS can achieve detection limits comparable to those for fluorescence spectroscopy, and at the same time provides higher structural specificity than fluorescence. The possibilities of using SERRS for single molecule detection are discussed.

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