Department of Polymer Engineering, Pukyong National University, 365 Sinseon-ro, Nam-gu, Busan 48547, Republic of Korea.
Nanoscale. 2017 Aug 17;9(32):11705-11712. doi: 10.1039/c7nr03077k.
While there has been remarkable success in generating silver (Ag) nanoplates, and they have considerable potential applications, their degradation behavior in certain environments remains poorly understood. In the current work, we investigated the chemical stability of triangular Ag nanoplates. A one-step water-based synthesis method regulated by the coordination of ligands to Ag cations was successfully employed to produce triangular Ag nanoplates with a high yield. The Ag nanoplates were irreversibly degraded when they were aged with poly(styrene-4-sulfonate) (PSS) at room temperature, and the corresponding localized surface plasmon resonances (LSPR) of the Ag nanoplates changed as well. In contrast, when the Ag nanoplates were aged with potassium persulfate (KPS), the shape evolution of Ag nanoplates was found to depend on the external temperature, and the Ag nanoplate solutions showed different final colors when different external temperatures were applied. These results exhibit important implications for the behavior of triangular Ag nanoplates in a wide variety of plasmonic applications and can be applied to the colorimetric sensing of the temperature history.
虽然在生成银（Ag）纳米板方面已经取得了显著的成功，并且它们具有相当大的潜在应用，但它们在某些环境中的降解行为仍了解甚少。在目前的工作中，我们研究了三角形 Ag 纳米板的化学稳定性。我们成功地采用了一种由配体与 Ag 阳离子配位调控的一步水基合成方法，以高产率制备了三角形 Ag 纳米板。Ag 纳米板在室温下与聚苯乙烯-4-磺酸钠（PSS）老化时会发生不可逆降解，并且 Ag 纳米板的相应局域表面等离子体共振（LSPR）也会发生变化。相比之下，当 Ag 纳米板与过硫酸钾（KPS）老化时，发现 Ag 纳米板的形状演变取决于外部温度，并且当施加不同的外部温度时，Ag 纳米板溶液会呈现出不同的最终颜色。这些结果对三角形 Ag 纳米板在各种等离子体应用中的行为具有重要意义，并可应用于温度历史的比色传感。
