Fast synthesis of gold nanoparticles by cold atmospheric pressure plasma jet in the presence of Au^(+) ions and a capping agent  

作　　者：Tatiana HABIB José Mauricio A.CAIUT Bruno CAILLIER 

机构地区：[1]Laboratoire Diagnostics des Plasmas Hors Equilibre(DPHE),Universitéde Toulouse,INU Champollion,Albi 81000,France [2]Department of Chemistry,The Nanomaterials and Luminescent Systems Group,Faculty of Philosophy,Science and Letters at Ribeirão Preto,University of São Paulo,Ribeirão Preto-SP 14040-901,Brazil

出　　处：《Plasma Science and Technology》2024年第7期108-115,共8页等离子体科学和技术（英文版）

基　　金：the Brazilian agencies FAPESP(Nos.2018/10172-7 and 2019/18828-1);CAPES(Finance Code 001),CNPq(No.303580/2021-6);the National Institute of Photonics—INFO(INCTs program);the Universidade de Sao Paulo(USP);Ministère de L’Enseignement Supérieur de la Recherche et de l’Innovation(France)for financial support。

摘　　要：Homogeneous gold nanoparticles were synthesized under atmospheric pressure using a nonthermal helium plasma jet in a single-step process.A current power supply was used to generate the plasma discharge rich in diverse reactive species.These species induce rapid chemical reactions responsible for the reduction of the gold salts upon contact with the liquid solution.In this study,spherical and monodispersed gold nanoparticles were obtained within 5 min of plasma exposure using a solution containing gold(Ⅲ)chloride hydrate(HAuCl_(4))as a precursor and polyvinylpyrrolidone(PVP)as a capping agent to inhibit agglomerations.The formation of these metal nanoparticles was initially perceptible through a visible change in the sample's color,transitioning from light yellow to a red/pink color.This was subsequently corroborated by UVvis spectroscopy,which revealed an optical absorption in the 520-550 nm range for Au NPs,corresponding to the surface plasmon resonance(SPR)band.An investigation into the impact of various parameters,including plasma discharge duration,precursor and capping agent concentrations,was carried out to optimize conditions for the formation of well-separated,spherical gold nanoparticles.Dynamic light scattering(DLS)was used to measure the size of these nanoparticles,transmission electron microscopy(TEM)was used to observe their morphology and X-ray diffraction(XRD)was also employed to determine their crystallographic structure.The results confirm that homogeneous spherical gold nanoparticles with an average diameter of 13 nm can be easily synthesized through a rapid,straightforward,and environmentally friendly approach utilizing a helium atmospheric pressure plasma.

关 键 词：gold nanoparticles NON-THERMAL plasma jet HELIUM DBD 

分 类 号：O62[理学—有机化学]