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Materials 2014, 7(12), 7781-7798; doi:10.3390/ma7127781

Effect of Temperature on the Growth of Silver Nanoparticles Using Plasmon-Mediated Method under the Irradiation of Green LEDs

Department of Applied Chemistry, National Chiayi University, Chiayi City 600, Taiwan
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Received: 8 May 2014 / Revised: 6 October 2014 / Accepted: 18 November 2014 / Published: 5 December 2014
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

Plasmon-mediated shape conversion of spherical silver nanoparticles (NPs) to nanostructures with other shapes under the irradiation of green LEDs (520 ± 20 nm, 35 mw/cm2) at various temperatures (60, 40, 20, 10, 5, and 0 °C) was performed in this study. It was found that the bath temperature used in the reaction can influence the reaction rates, i.e., the times needed for the shape transformation process were 5, 11.5, 25, 45, 72, and 100 h at 60, 40, 20, 10, 5, and 0 °C, respectively. In addition, the bath temperature can also alter the morphologies of the final products. The major products are silver nanoplates at 60, 40 and 20 °C. However, they became decahedral silver NPs at 5 and 0 °C. The percentages of decahedral silver NPs synthesized at 60, 40, 20, 10, 5, and 0 °C are 0%, 1%, 5%, 45%, 73%, and 89%, respectively. Measuring the surface-enhanced Raman spectroscopy (SERS) spectra of the probe molecule R6G in the presence of KBr showed that both silver nanoplate colloids synthesized at 60 °C and decahedral silver NP colloids synthesized at 0 °C in the absence of PVP had good SERS activities. View Full-Text
Keywords: plasmon-mediated; silver nanoplates; silver nanodecahedra; SERS plasmon-mediated; silver nanoplates; silver nanodecahedra; SERS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lee, S.-W.; Chang, S.-H.; Lai, Y.-S.; Lin, C.-C.; Tsai, C.-M.; Lee, Y.-C.; Chen, J.-C.; Huang, C.-L. Effect of Temperature on the Growth of Silver Nanoparticles Using Plasmon-Mediated Method under the Irradiation of Green LEDs. Materials 2014, 7, 7781-7798.

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