UV photoactivation for size and shape controlled synthesis and coalescence of gold nanoparticles in micelles
UV photoactivation for size and shape controlled synthesis and coalescence of gold nanoparticles in micelles
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作者：
Mandal, M;Ghosh, SK;Pal, T
不同尺寸和形状的稳定的金纳米颗粒的形成已被报道通过UV光活化的HAuCl 4在不同浓度的TX-100。它已被证明，较小的颗粒的金优先溶解的氰化物在空气中以更快的速度相比，较大的颗粒，因为更高的流动性，可能是因为较低的氧化还原电位的较小的颗粒。据观察，较小的金纳米粒子优先聚结在一起，在较高的温度胶束。温度引起的胶束形状的变化提供了金纳米粒子线性生长所需的模板/封端条件。
Formation of stable gold nano-particles of different size and shape has been reported via UV photoactivation of HAuCl4 in variable concentrations of TX-100. It has been shown that smaller particles of gold preferentially dissolved by cyanide at a faster rate in air in comparison to that for the larger particles because of higher mobility and possibly because of lower redox potentials of the smaller particles. It is observed that smaller gold nanoparticles preferentially coalesce together at higher temperature in micelles. Temperature induced changes in the shape of the micelle provide the required template/capping condition for linear growth of gold nanoparticles.