Micro-raman spectroscopy study of colloidal crystal films of polystyrene-gold composites

Y. Djaoued, S. Badilescu, S. Balaji, N. Seirafianpour, A. R. Hajiaboli, R. Banan Sadeghian, K. Braedley, R. Brüning, M. Kahrizi, Vo Van Truong

    研究成果: Article査読

    14 被引用数 (Scopus)

    抄録

    Monolayers and multilayers of polystyrene (PS)-gold composite films prepared by two different deposition methods have been investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and confocal Raman microspectroscopy. The intensity of the 1001 cm -1 ring breathing mode of PS is used to evaluate the degree of ordering of monolayers and multilayers within a colloidal crystal. The depth profiling capability of confocal Raman microscopy is used to probe the regions inside the fractures in multilayered films. The intensity profile of the 1001 cm-1 peak revealed the presence of fractures of different shapes with some PS microspheres at the bottom of the fracture. A strong increase in the Raman intensity (by 103 times) has been observed when probing the regions where Au nanoparticles are concentrated in aggregates of different shapes. This enhancement is attributed to the surface plasmons generated by the periodic structure of the gold nanoparticles.

    本文言語English
    ページ(範囲)1202-1210
    ページ数9
    ジャーナルApplied spectroscopy
    61
    11
    DOI
    出版ステータスPublished - 2007 11 1

    ASJC Scopus subject areas

    • 器械工学
    • 分光学

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