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Radiolytic formation of highly luminescent triangular Ag nanocolloids

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Abstract

In this work, luminescent triangular silver nanoparticles were synthesized by radiolytic reduction method. The results showed that by variation of irradiation dose, morphology of silver nanoparticles can be converted from spherical to triangular. These shape variations mainly arise from competition between adsorption rate of polymer chains on (111) facets and reduction rate of the Ag+ ions along (110) facets during increasing dose. Furthermore, the dramatically enhanced photoluminescence spectra were observed from triangular Ag nanoparticles. This unusual behavior can be explained by excitation of dipolar and quadrupolar resonance in triangular nanoparticles which increase the electric fields at the surface.

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Acknowledgments

This work is supported by the Higher Institution’s Centre of Excellence (HiCOE) Grant funded under AKU95-HiCOE Grant. The authors would like to thank to the Centre of Research and Instrumentation Management (CRIM) of Universiti Kebangsaan Malaysia for provision of laboratory facilities. The first author would like to thank Dr. Farhad Larki, Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, for invaluable discussions and advices which were helpful in preparing this manuscript.

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Authors and Affiliations

  1. Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), 43600, Bangi, Selangor, D.E., Malaysia

    Alam Abedini, P. Susthitha Menon & Sahbudin Shaari

  2. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600, Bangi, Selangor, D.E., Malaysia

    Abdul Razak Daud & Muhammad Azmi Abdul Hamid

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  1. Alam Abedini
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  2. P. Susthitha Menon
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  3. Abdul Razak Daud
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  4. Muhammad Azmi Abdul Hamid
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  5. Sahbudin Shaari
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Correspondence to Alam Abedini.

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Abedini, A., Susthitha Menon, P., Daud, A.R. et al. Radiolytic formation of highly luminescent triangular Ag nanocolloids. J Radioanal Nucl Chem 307, 985–991 (2016). https://doi.org/10.1007/s10967-015-4223-1

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  • DOI: https://doi.org/10.1007/s10967-015-4223-1

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