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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Preparation of Gold Nanoparticles in a Layer of Gelatin Film Using Photographic Materials. VII. Acceleration of Gold Deposition by Using Ascorbic Acid
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Preparation of Gold Nanoparticles in a Layer of Gelatin Film Using Photographic Materials. VII. Acceleration of Gold Deposition by Using Ascorbic Acid

机译：光学材料制备聚明胶膜层中的金纳米粒子。 VII。 使用抗坏血酸加速金沉积

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摘要

The preparation of gold nanoparticles using silver-salt photographic materials and a method of gold-deposition development are investigated. Although gold rapidly precipitated in the gold-deposition developer when ascorbic acid was added, gold atoms were deposited only on the exposed areas of the photographic plate when the plate was immersed in the solution. While the deposition proceeds slowly via the disproportionation reaction of gold(I) ions in the absence of ascorbic acid, the addition of ascorbic acid accelerates the deposition rate significantly and increases the photosensitivity of the photographic plate. The gold deposition is catalyzed by photolytic silver specks, called latent image specks, on silver halide grains. Absorption spectra and TEM observations suggest a broadening of the particle size distribution, and this indicates that the difference in the catalytic activities of the photolytic silver specks between the two reactions is due to the difference in the critical size of the silver specks for triggering the deposition. Because the catalysts were prepared using light, light-based control of the catalytic properties may be possible.
机译：研究了使用银盐照相材料制备金纳米颗粒和金沉积发育方法。虽然当加入抗坏血酸时，黄金在金沉积显影剂中迅速沉淀，但是当将板浸入溶液中时，仅在照相板的暴露区域上沉积金原子。虽然沉积在没有抗坏血酸的情况下通过金（I）离子的歧化反应缓慢进行，但是加入抗坏血酸显着加速沉积速率并增加了照相板的光敏性。在卤化银晶粒上被称为潜像斑点的光解银滴催化金沉积。吸收光谱和TEM观察表明粒度分布的扩大，这表明两种反应之间的光解银块的催化活性的差异是由于银片的临界大小的差异来引发沉积。因为使用光制备催化剂，所以可以进行催化性能的光基对照。

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