Graduate School of Environmental Studies, Nagoya University , Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan.
ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3226-32. doi: 10.1021/am5008886. Epub 2014 Feb 26.
DNA cross-linked hydrogel was used as a matrix for synthesis of gold nanoparticles. DNA possesses a strong affinity to transition metals such as gold, which allows for the concentration of Au precursor inside a hydrogel. Further reduction of HAuCl4 inside DNA hydrogel yields well dispersed, non-aggregated spherical Au nanoparticles of 2-3 nm size. The average size of these Au nanoparticles synthesized in DNA hydrogel is the smallest reported so far for in-gel metal nanoparticles synthesis. DNA hybrid hydrogel containing gold nanoparticles showed high catalytic activity in the hydrogenation reaction of nitrophenol to aminophenol. The proposed soft hybrid material is promising as environmentally friendly and sustainable material for catalytic applications.
DNA 交联水凝胶被用作合成金纳米粒子的基质。DNA 对金等过渡金属具有很强的亲和力，这使得 Au 前体能够在水凝胶内浓缩。进一步在 DNA 水凝胶内还原 HAuCl4 可以得到分散性良好、不聚集的 2-3nm 尺寸的球形 Au 纳米粒子。在 DNA 水凝胶中合成的这些 Au 纳米粒子的平均尺寸是迄今为止报道的在凝胶内合成金属纳米粒子中最小的。含有金纳米粒子的 DNA 杂化水凝胶在硝基苯酚加氢还原为氨基酚的反应中表现出很高的催化活性。这种新型软杂化材料有望成为用于催化应用的环保、可持续材料。
