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Synthesis of gelatin-capped gold nanoparticles with variable gelatin concentration

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Abstract

Gelatin-stabilized gold nanoparticles (AuNPs-gelatin) with controlled particle size were synthesized with simple variation of concentration of gelatin by reducing in situ tetrachloroauric acid with sodium citrate. The nanoparticles showed excellent colloidal stability. Transmission electron microscopy (TEM) revealed the formation of well-dispersed gold nanoparticles (AuNPs) with different sizes. The methodology produces particles 10–15 nm in size depending on the concentration of gelatin used. The measured AuNPs are 10, 11, 12, 13, 14, and 15 nm for AuNPs-gelatin 1, 0.5, 0.25, 0.1 and 0.05%, and pure AuNPs, respectively. The AuNPs-gelatin exhibit size-dependent localized surface plasmon resonance behavior as measured by UV–visible spectroscopy. UV–vis spectroscopy and TEM results suggest that higher concentration of gelatin favor smaller particle size and vice versa. FTIR spectroscopy analysis of AuNPs-gelatin revealed the amino bands and carboxyl peak of gelatin. The crystalline nature of AuNPs was investigated by X-ray diffraction.

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Acknowledgments

This work was financially supported by the Korea Science & Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. R01-2007-000-20488-0) and Brain Korea 21 project, Chonbuk National University. Authors wish to thanks Mr. Jong Gyun Kang for taking good quality TEM images.

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Authors and Affiliations

  1. Department of Dental Biomaterials and Institute of Oral Bioscience, School of Dentistry, Brain Korea 21 Project, Chonbuk National University, Jeonju, 561-756, South Korea

    M. P. Neupane, I. S. Park, M. H. Lee & T. S. Bae

  2. Neural Injury Research Lab, Department of Neurology, Asan Life Science Institute, University of Ulsan, College of Medicine, Seoul, 138-736, South Korea

    S. J. Lee

  3. Department of Biochemistry, School of Dentistry, Hokkaido University, North 13 West 7, Kita-ku, Sapporo, 060-8586, Japan

    Y. Kuboki

  4. Department of Biomedical, Dental Materials and Engineering, School of Dentistry, Hokkaido University, North 13 West 7, Kita-ku, Sapporo, 060-8586, Japan

    M. Uo & F. Watari

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  1. M. P. Neupane
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  2. S. J. Lee
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  4. M. H. Lee
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Correspondence to M. H. Lee.

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Neupane, M.P., Lee, S.J., Park, I.S. et al. Synthesis of gelatin-capped gold nanoparticles with variable gelatin concentration. J Nanopart Res 13, 491–498 (2011). https://doi.org/10.1007/s11051-010-9971-9

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  • DOI: https://doi.org/10.1007/s11051-010-9971-9

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