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

机译：在绿色LED辐照下温度对等离子介导方法对银纳米颗粒生长的影响

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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.
机译：在绿色LED（520±20 nm，35 mw / cm 2 ）的各种温度下（60、40， 20、10、5和0°C）在此研究中进行。发现反应中使用的浴温会影响反应速率，即在60、40、20、10， 5和0°C。另外，浴温还可以改变最终产品的形态。主要产品是60、40和20°C的银纳米板。但是，它们在5和0°C时变成了十面体银NP。在60、40、20、10、5和0°C下合成的十面体银NP的百分比分别为0％，1％，5％，45％，73％和89％。在存在KBr的情况下测量探针分子R6G的表面增强拉曼光谱（SERS）光谱表明，在60°C合成的银纳米板胶体和在0°C且无PVP的合成的十面体银NP胶体均具有良好的SERS活动。

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