Ding Shaohua, Qian Weiping, Tan Yong, Wang Yi
State Key Laboratory of Bioelectronics, Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China.
Langmuir. 2006 Aug 15;22(17):7105-8. doi: 10.1021/la060273t.
We present here a facile route to the incorporation of gold nanoparticles (GNPs) with desired sizes into three-dimensionally ordered macroporous (3DOM) matrixes. Our route combined the first attachment of small GNPs to the silica colloidal crystal templates as precursors and their subsequent controlled growth by the in-situ chemical reduction method. The desired enlargement of GNPs was acquired via their alternating and repeated exposure to solutions of auric salts and reducing agent NH(3)OH. Such gold-decorated silica templates were also converted into self-sustained polystyrene (PS) macroporous films with GNPs embedded in their wall structures. The growth of gold seeds can be easily followed by their UV-vis absorbance spectra. The route provides an alternative way to incorporate GNPs with predetermined sizes into 3DOM matrixes without destroying their ordered structures. A highlight of our approach is that it obviates the need for the preformation of various-sized GNPs, which is an indispensable step in many other approaches.
我们在此展示了一种简便的方法，可将具有所需尺寸的金纳米颗粒（GNP）掺入三维有序大孔（3DOM）基质中。我们的方法是先将小的GNP作为前体附着到二氧化硅胶体晶体模板上，然后通过原位化学还原法对其进行可控生长。通过使GNP交替且重复地暴露于金盐溶液和还原剂NH₃OH中，实现了GNP所需的尺寸增大。这种装饰有金的二氧化硅模板还可转化为自持的聚苯乙烯（PS）大孔薄膜，GNP嵌入其壁结构中。通过紫外可见吸收光谱可以轻松跟踪金种子的生长。该方法提供了一种将具有预定尺寸的GNP掺入3DOM基质而不破坏其有序结构的替代方法。我们方法的一个亮点是无需预先制备各种尺寸的GNP，而这在许多其他方法中是必不可少的步骤。
