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Ag clusters electrochemically reduced in stearic acid Langmuir-Blodgett films and their structural characterizations

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Abstract

Silver ions confined in the silver stearate Langmuir-Blodgett (L-B) films of 8–14 layers were electrochemically reduced into Ag clusters, which made the observation of well-ordered scanning tunneling microscope (STM) images of the films with molecular resolution. A hexagonal packing of the hydrophobic chains was obtained. which was superimposed on the two-dimensional Ag clusters of 2–3 nm in diameter. Furthermore, a (2×1) structure of the hexagonal packing was observed. It was attributed to a self-assembled structure of the hydrophilic surface of the L-B films through hydrogen bonding. The strong surface enhanced Raman scattering (SERS) effect of Ag clusters made it possible to record Raman spectra of twoiayer stearic acid L-B films in the region of C—C stretching vibration frequencies. The appearance of the bands at 1 128.0 and 1 100. 7 cm−1, which correspond to the antisymmetric C—C stretching model of the acyl chains in theall-trans conformation and the C—C stretching model of the acyl chains in thegauche conformations, respectively, means that the methylene chains are mainly inall-trans conformation, but some of them become disordered.

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References

  1. Meldrum, F. C., Kotov, N. A., Fendler, J. H., Preparation of particulate mono- and multilayers from surfactant-stabilized, nanosized magnetite crystallites,J. Phys. Chem., 1994, 98: 4506.

    Article  CAS  Google Scholar 

  2. Peng, X. G., Guan, S. G., Chai, X. D.et al., Preparation and structure of Q-state lead sulfide monolayers in metastable stearic acid Langmuir-Blodgett films,J. Phys. Chem., 1992, 96(7): 3170.

    Article  CAS  Google Scholar 

  3. Ji, S. X., Fan, C. Y., Ma, F. Y.et al., The formation of quantum size silver particles insitu at the monolayer surface,Thin Soltd Films, 1994, 242: 16.

    Article  CAS  Google Scholar 

  4. Pike, J. K., Byrd, H., Morrone, A. A.et al., Template-directed synthesis: oriented Cd12 prepared in a Langmuir-Bldgett film,J.Am.Chem.Soc., 1993, 115(18): 8497.

    Article  CAS  Google Scholar 

  5. Uchida, L., Ishiho, A., Matsue, T., Blocking of an electrode reaction by a stearic acid monolayer,J. Electrwnal. Chem., 1989, 266: 455.

    Article  CAS  Google Scholar 

  6. Sabatanl, E., Rubinstein, I., Organized self-assembling monolayers on electrodes, 2: Monolayer-based ultramicroelectrodes for the study of very rapid electrode kinetics,J. Phys. Chem., 1987, 91(27): 6663.

    Article  Google Scholar 

  7. Wagner, C. P., Riggs, W. M., Davis, L. E.et al., Handbook of X-ray Electron Spectroscopy, New York: Perkin-Elmer Cooperation, 1979.

    Google Scholar 

  8. Hober, J. K. H., Lang, C. A., Hsch, T. W., Scanning tunneling microscopy of lipid films and embedded biomolecules,Chem. Phys. Lett., 1988. 145(2): 151.

    Article  Google Scholar 

  9. Kimura, F., Umemura, J., Takenaka, T., FTIR-ATR studies on Langmuir-Blodgett films of stearic acid with 1—9 monolayers.Langmuir, 1986, 2(1): 96.

    Article  CAS  Google Scholar 

  10. Knoll, W., Phiulpott, M. R., Golden, W. G., Surface infrared and surface enhanced Raman vibrational spectra of monolayer assemblies in contact with rough metal surfaces,J. Chem. Phys., 1982, 77(1): 219.

    Article  CAS  Google Scholar 

  11. Harrand, M., Maswn, M., Polarized Raman spectra of thin films (III): Conformational analysis of Langmuir-Bldgett multilayers (1 to 49) barium stearate,J. Chem. Phys., 1987, 87(9): 5176.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, 361005, Xiamen, China

    Yunhong Zhang, Zhaoxiong Xie, Bingzeng Hua, Bingwei Mao, Yanzhen Chen, Qianshu Li & Zhaowu Tian

  2. College of Chemical Engineering and Material Science, Beijing Institute of Technology, 100081, Beijing, China

    Yunhong Zhang & Qianshu Li

Authors
  1. Yunhong Zhang
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  2. Zhaoxiong Xie
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  3. Bingzeng Hua
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  4. Bingwei Mao
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  5. Yanzhen Chen
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  6. Qianshu Li
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  7. Zhaowu Tian
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Project supported by the State Key Laboratory for Physical Chemistry of Solid Surfaces of Xiamen University and by the Fund of Beijing Institute of Technology for Young Researchers.

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Zhang, Y., Xie, Z., Hua, B. et al. Ag clusters electrochemically reduced in stearic acid Langmuir-Blodgett films and their structural characterizations. Sc. China Ser. B-Chem. 40, 397–404 (1997). https://doi.org/10.1007/BF02877756

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  • DOI: https://doi.org/10.1007/BF02877756

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