Habib Tatiana, Caiut José Mauricio A, Caillier Bruno
Laboratoire Diagnostics des Plasmas Hors Equilibre (DPHE), Université de Toulouse, INU Champollion, Albi, France.
Department of Chemistry-FFCLRP, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
Nanotechnology. 2022 May 17;33(32). doi: 10.1088/1361-6528/ac6528.
Silver nanoparticles are one of the most extensively used metallic nanomaterials due to their unusual physical and chemical properties as well as their promising applications in a wide range of different fields. In this study, a non-thermal atmospheric pressure helium plasma jet was used to successfully synthesize silver nanoparticles with silver nitrate as a precursor and trisodium citrate as a capping agent. The browning of the solution after only 5 min of plasma irradiation is a result of the surface plasmon resonance (SPR) from the obtained silver nanoparticles. The SPR was confirmed by the presence of an absorption band in the visible range between 400 and 450 nm demonstrated in the UV-vis spectra. The effect of different chemical parameters such as the concentration of silver nitrate and the concentration of citrate on the silver nanoparticles have been studied. These nanoparticles were further characterized using transmission electron microscopy and dynamic light scattering. Therefore, the plasma jet was advantageous to fast produce silver nanoparticles in friendly conditions. In addition, the used experimental setup allows further studies in different solvents conditions and with different capping agents. So, this methodology could be useful for the preparation of silver nanoparticles required for numerous applications such as bioactivity, catalysis, surface enhanced Raman scattering, and photonic.
由于其独特的物理和化学性质以及在广泛不同领域的潜在应用，银纳米颗粒是使用最广泛的金属纳米材料之一。在本研究中，使用非热大气压氦等离子体射流，以硝酸银为前驱体、柠檬酸钠为封端剂成功合成了银纳米颗粒。等离子体辐照仅5分钟后溶液的褐变是所得银纳米颗粒表面等离子体共振（SPR）的结果。紫外可见光谱中在400至450nm可见光范围内出现的吸收带证实了SPR。研究了硝酸银浓度和柠檬酸盐浓度等不同化学参数对银纳米颗粒的影响。使用透射电子显微镜和动态光散射对这些纳米颗粒进行了进一步表征。因此，等离子体射流有利于在友好条件下快速制备银纳米颗粒。此外，所使用的实验装置允许在不同溶剂条件下和使用不同封端剂进行进一步研究。所以，这种方法对于制备生物活性、催化、表面增强拉曼散射和光子学等众多应用所需的银纳米颗粒可能是有用的。
