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Photoluminescence Study of Silver Nano-hexagons

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Abstract

Silver nano-hexagons have been prepared through the reduction of silver ions by ethylene glycol with poly (vinyl pyrrolidone) (PVP) as a capping agent or stabilizing agent. The morphology and structure of these nano-hexagons have been investigated using high-resolution transmission electron microscopy (HRTEM). The X-ray diffraction study shows that the nanoparticles are crystalline in nature and mainly composed of face-centered cubic (fcc) silver, and from Scherer equation, the average size has been calculated as 45 nm (approx), whereas HRTEM image shows that the average size of silver nano-hexagons is 50 nm. Further, high-performance liquid chromatography (HPLC) study reveals the monodispersity of the nanoparticles, which matches well with the narrow size distribution as observed in TEM analysis. UV/Vis study gives an absorption peak at 410 nm due to surface plasmon resonance (SPR), whereas photoluminescence (PL) spectra of silver nano-hexagons show an emission peak at 490 nm, when excited at 390 nm.

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Acknowledgments

Authors are thankful to the SAIF, NEHU, Shillong, India, for conducting the TEM analysis; Mr. Ratan Boruah, T.A., Department of Physics, Tezpur University, Assam, India, for the XRD study; and Dr. Gautam Gope, S.O., CIL, Assam University, Silchar, India, for the assistance during the HPLC analysis.

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Authors and Affiliations

  1. Nano-Physics & Nanotechnology Research Lab., Department of Physics, Tripura University, Suryamaninagar, 799022, Tripura, India

    Sumit Sarkar & Ratan Das

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  1. Sumit Sarkar
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  2. Ratan Das
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Correspondence to Ratan Das.

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Sarkar, S., Das, R. Photoluminescence Study of Silver Nano-hexagons. Plasmonics 11, 551–556 (2016). https://doi.org/10.1007/s11468-015-0082-4

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  • DOI: https://doi.org/10.1007/s11468-015-0082-4

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