Velgosova Oksana, Mačák Livia, Lisnichuk Maksym, Vojtko Marek
Institute of Materials and Quality Engineering, Faculty of Materials Metallurgy and Recycling, Technical University of Kosice, Letná 9/A, 042 00 Kosice, Slovakia.
Faculty of Science, Institute of Physics, Pavol Jozef Šafárik University in Kosice, Park Angelinum 9, 040 01 Kosice, Slovakia.
Polymers (Basel). 2022 Jun 30;14(13):2666. doi: 10.3390/polym14132666.
A chemical method was successfully used to synthesize silver nanoparticles (AgNPs) with various shapes. The shape of the nanoparticles affects the color of the colloid (spherical-yellow solution, triangular-blue, a mixture of spherical and triangular-green). The NaBH, which acts as the main reducing agent and HO have a significant impact on the shape of AgNPs. It has also been shown that the ratio between precursor, reducing, and the stabilizing agent is crucial for the formation of the required nanoparticles. The light sensitivity of AgNPs and the presence of HO lead to a significant change in AgNPs' shape and size with time and to the formation of the dichroic effect. UV-vis spectrophotometry, TEM, SEM/FIB, and EDX methods were used to analyze the shape, size, and composition of the nanoparticles. Polymer matrix composite with AgNPs was prepared by the "ex-situ" method.
一种化学方法被成功用于合成各种形状的银纳米颗粒（AgNPs）。纳米颗粒的形状会影响胶体的颜色（球形——黄色溶液、三角形——蓝色、球形和三角形混合——绿色）。作为主要还原剂的硼氢化钠（NaBH₄）和过氧化氢（H₂O₂）对AgNPs的形状有显著影响。研究还表明，前驱体、还原剂和稳定剂之间的比例对于所需纳米颗粒的形成至关重要。AgNPs的光敏感性和过氧化氢的存在会导致AgNPs的形状和大小随时间发生显著变化，并产生二向色效应。采用紫外可见分光光度法、透射电子显微镜（TEM）、扫描电子显微镜/聚焦离子束（SEM/FIB）和能谱仪（EDX）方法分析纳米颗粒的形状、大小和组成。通过“非原位”方法制备了含有AgNPs的聚合物基复合材料。
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