Center for Materials Chemistry, Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China.
Langmuir. 2013 Aug 20;29(33):10559-65. doi: 10.1021/la402147f. Epub 2013 Aug 8.
This paper describes a simple and convenient procedure to synthesize monodisperse silver (Ag) quasi-nanospheres with size tunable in a range of 19-140 nm through a one-step seeded growth strategy. Acetonitrile was employed as a coordinating ligand of a Ag(I) salt in order to achieve a low concentration of elemental Ag after reduction and thus suppression of new nucleation events. Since the addition of the seeds significantly accelerates the reduction reaction of Ag(I) by ascorbic acid, the reaction kinetics was further delicately balanced by tuning the reaction temperature, which proved to be critical in producing Ag quasi-nanospheres with uniform size and shape. This synthesis is highly scalable, so that it provides a simple yet very robust process for producing Ag quasi-nanospheres for many biological, analytical, and catalytic applications which often demand samples in large quantity and widely tunable particle sizes.
本文描述了一种简便的方法，通过一步种子生长策略合成尺寸在 19-140nm 范围内可调的单分散银（Ag）准纳米球。乙腈被用作 Ag（I）盐的配位配体，以在还原后实现低浓度的元素 Ag，从而抑制新的成核事件。由于种子的加入显著加速了抗坏血酸对 Ag（I）的还原反应，因此通过调节反应温度进一步精细平衡了反应动力学，这对于制备具有均匀尺寸和形状的 Ag 准纳米球至关重要。该合成方法具有高度的可扩展性，为许多生物、分析和催化应用提供了一种简单而非常稳健的生产 Ag 准纳米球的方法，这些应用通常需要大量且粒径可调范围广泛的样品。
