题目：

Visible-Light-Induced Effects of Au Nanoparticle on Laccase Catalytic

Activity

作者：

Sijie Guo, Hao Li, Juan Liu, Yanmei Yang, Weiqian Kong, Shi Qiao, Hui Huang, Yang Liu,*and Zhenhui Kang*

单位：

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, 215123, Jiangsu, PR China

摘要：

A deep understanding of the interaction between the nanoparticle and enzyme is important for biocatalyst design. Here, we report the in situ synthesis of laccase−Au NP (laccase−Au) hybrids and its catalytic activity modulation by visible light. In the present hybrid system, the activity of laccase was significantly improved (increased by 91.2% vs free laccase) by Au NPs. With a short time visible light illumination (λ > 420 nm, within 3 min), the activity of laccase−Au hybrids decreased by 8.1% (vs laccase−Au hybrid without light), which can be restored to its initial one when the illumination is removed. However, after a long time illumination (λ > 420 nm, over 10 min), the catalytic activity of laccase−Au hybrids consecutively decreases and is not reversible even after removing the illumination. Our experiments also suggested that the local surface plasma resonance effect of Au NPs causes the structure change of laccase and local high temperature near the Au NPs. Those changes eventually affect the transportation of electrons in laccase, which further results in the declined activity of laccase.

影响因子：

5.900

分区情况：

1区

链接： 

http://pubs.acs.org/doi/abs/10.1021%2Facsami.5b06472