Li Baoshun, Li Jianjun, Zhao Junwu
The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
J Nanosci Nanotechnol. 2012 Dec;12(12):8879-85. doi: 10.1166/jnn.2012.6725.
Highly fluorescent gold nanoclusters have attracted much attention recently. Here, we reported a "green", facile method for fine-tuning the fluorescence emission wavelength of gold nanoclusters synthesized with bovine serum albumin (BSA). The principle of the experimental work involved the utilization of BSA as the reductant for the synthesis of gold nanoclusters and the addition of small amounts of silver ions in the synthesis process for tuning the fluorescence properties of the synthesized gold nanoclusters. Our results showed that fluorescence emission wavelength of the synthesized gold nanoclusters could be fine-tuned in a fairly wide range (- 90 nm) by addition of different quantities of silver nitrate in the synthesis process. In addition, with increasing silver ions quantity the emission wavelength of the gold nanoclusters varied in a non-monotonic manner. In this way, gold nanoclusters emitting yellow, orange or red fluorescence with decent quantum yields were readily obtained in a single batch.
高荧光金纳米簇最近备受关注。在此，我们报道了一种“绿色”、简便的方法，用于微调用牛血清白蛋白（BSA）合成的金纳米簇的荧光发射波长。实验工作原理包括利用BSA作为合成金纳米簇的还原剂，并在合成过程中添加少量银离子来调节合成的金纳米簇的荧光特性。我们的结果表明，通过在合成过程中添加不同量的硝酸银，合成的金纳米簇的荧光发射波长可以在相当宽的范围内（-90nm）进行微调。此外，随着银离子量的增加，金纳米簇的发射波长呈非单调变化。通过这种方式，在一批实验中很容易获得具有良好量子产率的发出黄色、橙色或红色荧光的金纳米簇。
