SERS EXCITATION PROFILES OF PHTHALAZINE ADSORBED ON SINGLE COLLOIDAL SILVER AGGREGATES AS A FUNCTION OF CLUSTER SIZE

作者: B. Vlčková , X. J. Gu , M. Moskovits

DOI: 10.1021/JP961703Z

关键词:

摘要: The wavelength-dependent SERS enhancement and photoreactivity of phthalazine (pht) adsorbed on single Ag colloid fractal clusters deposited out solution onto a glass surface were determined as function cluster size from the excitation profiles spectra three individual with dimensions 1.9 × μm, 3.7 2.8 μm 7.5 4.7 μm. correlated given by using imaging Raman microspectroscopy. obtained various bands observed in could be understood terms two contributions:  (i) photochemical activity which grows monotonically toward blue spectral range (470−650 nm) used (ii) increases red. variety shapes for can explained relative contribution pht reagent photoproduct to sometimes overlapping bands. contribu...

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