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Laser irradiation induced spectral evolution of the surface-enhanced raman scattering (SERS) of 4-tert-butylbenzylmercaptan on gold nanoparticles assembly

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Abstract

The spectral evolution of the surface-enhanced Raman scattering (SERS) of 4-tert-butylbenzylmercaptan (4-tBBM) on gold nanoparticles assembly under laser irradiation is reported. The relative intensities of typical peaks in the spectrum of 4-tBBM gradually change with irradiation time. Comparison of the rate of spectral changes under several experimental conditions indicates that the surface plasmon resonance (SPR) induced heat in the gold nanoparticles assembly is the origin of the spectral evolution. During the process of self-assembly, 4-tBBM molecules do not form a compact ordered monolayer because of the spatial hindrance of the 4-tert-butyl end group. The heat induced by laser irradiation drives the 4-tBBM molecules to rearrange to a more stable orientation.

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Authors and Affiliations

  1. Center for Nanoscale Science and Technology, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China

    Tong LianMing, Zhu Tao & Liu ZhongFan

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  1. Tong LianMing
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  2. Zhu Tao
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  3. Liu ZhongFan
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Correspondence to Zhu Tao.

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Supported by the National Natural Science Foundation of China (Grant No. 20473004) and the Beijing Key Lab for Nanophotonics and Nanostructure

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Tong, L., Zhu, T. & Liu, Z. Laser irradiation induced spectral evolution of the surface-enhanced raman scattering (SERS) of 4-tert-butylbenzylmercaptan on gold nanoparticles assembly. SCI CHINA SER B 50, 520–525 (2007). https://doi.org/10.1007/s11426-007-0096-7

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  • DOI: https://doi.org/10.1007/s11426-007-0096-7

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