Silver nanoparticles (Ag NPs) are prepared using two different techniques namely hydrothermal and laser ablation methods. The purpose of this study is to find a more suitable method to prepare Ag NPs through comparison that can give stable and size-controlled silver nanoparticles. Techniques used for observations are X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Comparison of results exhibited that hydrothermal process is a more suitable method to prepare silver nanoparticles with smaller uniform size and better yield as compared to laser ablation method. Also, at low temperature, NPs obtained using hydrothermal process provide better control on morphology, high purity and narrow size distribution.

中文翻译：

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水热和激光烧蚀技术合成的银纳米粒子 (Ag NPs) 的形态

银纳米粒子 (Ag NPs) 使用两种不同的技术制备，即水热法和激光烧蚀法。本研究的目的是通过比较找到一种更合适的方法来制备银纳米粒子，从而得到稳定且尺寸可控的银纳米粒子。用于观察的技术是 X 射线衍射 (XRD)、透射电子显微镜 (TEM)、扫描电子显微镜 (SEM) 和能量色散 X 射线光谱 (EDX)。结果比较表明，与激光烧蚀法相比，水热法是一种更适合制备尺寸更小均匀、产率更高的银纳米粒子的方法。此外，在低温下，使用水热法获得的纳米颗粒可以更好地控制形态、高纯度和窄尺寸分布。