SURFACE-MEDIATED FORMATION OF GOLD PARTICLES IN BASIC METHANOL
SURFACE-MEDIATED FORMATION OF GOLD PARTICLES IN BASIC METHANOL
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DOI：
10.1021/j100090a018
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发表时间：
1994-09-29
影响因子：
--
通讯作者：
MILLS, G
中科院分区：
文献类型：
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作者：
QUINN, M;MILLS, G
金属颗粒是通过aucl -离子在碱性、空气饱和的甲醇溶液中自发还原而产生的。稳定的金胶体是在几种稳定剂的存在下形成的。金属粒子的等离子体带在反应的初始阶段发生了相当大的位移，并且在这些位移期间检测到光散射。动力学结果表明，还原过程受到与溶液接触的表面性质的强烈影响。提出小金属颗粒的生成主要发生在含有离子化表面OH基团的表面上，小金属颗粒从表面解吸时形成胶体颗粒。
Metal particles are generated via the spontaneous reduction of AuCl4- ions in basic, air-saturated methanolic solutions. Stable Au colloids are formed in the presence of several stabilizers. The plasmon band of the metal particles is shifted considerably at the initial stages of the reaction, and light scattering is detected during these shifts. Kinetic results indicate that the reduction process is strongly influenced by the nature of the surface that is in contact with the solutions. It is proposed that generation of small metal particles occurs mainly on surfaces that contain ionized surface OH groups and that colloidal particles are formed when small metal particles desorb from the surfaces.