Surface-Enhanced Raman Scattering from Silver Salt of Carboxymethylcellulose Photolyzed with UV-Light

Miyama, Toshihito; Yonezawa, Yoshiro; Sato, Tomoo; Umemura, Junzo; Takenaka, Tohru

doi:10.1246/cl.1993.1537

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…A similar phenomenon was also demonstrated previously on charged colloids . On the other hand, surface plasmon excitation can dramatically increase the electromagnetic field near particle surfaces, resulting in surface-enhanced Raman scattering (SERS) …”

Section: Resultssupporting

confidence: 80%

Chitosan-Mediated Synthesis of Gold Nanoparticles on Patterned Poly(dimethylsiloxane) Surfaces

et al. 2006

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Synthesis of gold nanoparticles on surfaces has been accomplished by the incubation of poly(dimethylsiloxane) (PDMS) films in tetrachloroauric(III) acid and chitosan solution at room temperature and 4 degrees C. One important point in the present study is that the synthesis selectively occurred on the PDMS surface. These observations are substantially different from the reaction in solution, in which no particles can be formed at room temperature. Computation of surface plasmon bands (SPBs) based on Mie theory suggests that the particles are partially coated by chitosan molecules, and the experimental results confirm the theoretical calculations. The proposed mechanism is that chitosan molecules adsorbed or printed on the PDMS surfaces act as reducing/stabilizing agents. Furthermore, PDMS films patterned with chitosan could induce localized synthesis of gold nanoparticles in regions capped with chitosan only. In this way, colloidal patterns were fabricated on the surfaces with high spatial selectivity simultaneously with the synthesis of the particles. Surface-induced fluorescence quenching was observed in the regions capped with gold nanoparticles as well.

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Section: Resultssupporting

confidence: 80%

Chitosan-Mediated Synthesis of Gold Nanoparticles on Patterned Poly(dimethylsiloxane) Surfaces

et al. 2006

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Enhancement mechanism of SERS from cyanine dyes adsorbed on Ag2O colloids

Wang

Wen

et al. 1997

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Kinetics of Silver Particle Photogeneration in Crosslinked PVA/PAA Films

et al. 2004

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The photogeneration of Ag particles and clusters with 350 nm photons was studied in thin films containing poly(vinyl alcohol) and poly(acrylic acid) that were crosslinked with glutaraldehyde. Product formation occurred through two consecutive processes that were linear functions of time. Kinetic determinations showed that all the processes followed rate laws that varied linearly with I 0 2 and the [Ag+] present in the films. These findings are consistent with the occurrence of biphotonic reactions in which the light excitation step is rate-determining. Two kinetically indistinguishable particle formation mechanisms are able to replicate the empirical rate law. In these mechanisms, particles form via addition of photogenerated mobile Ag atoms to either cationic or neutral metal clusters. Mechanisms based on growth of cationic metal clusters provide the most realistic representations of the processes taking place in the films, including the formation of stable Ag3 + clusters as byproducts of the metal crystallite generation.

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Surface-Enhanced Raman Scattering from Silver Salt of Carboxymethylcellulose Photolyzed with UV-Light

Cited by 3 publications

References 10 publications

Chitosan-Mediated Synthesis of Gold Nanoparticles on Patterned Poly(dimethylsiloxane) Surfaces

Chitosan-Mediated Synthesis of Gold Nanoparticles on Patterned Poly(dimethylsiloxane) Surfaces

Enhancement mechanism of SERS from cyanine dyes adsorbed on Ag2O colloids

Kinetics of Silver Particle Photogeneration in Crosslinked PVA/PAA Films

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