丝素
碳化
光热治疗
材料科学
催化作用
纳米技术
丝绸
化学工程
化学
有机化学
复合材料
扫描电子显微镜
工程类
作者
Xueqing Xiong,Yonghua Tang,Chengjie Xu,Yanyan Huang,Yupeng Wang,Lianlian Fu,Changxu Lin,Dongfang Zhou,Youhui Lin
出处
期刊:Small
[Wiley]
日期:2020-09-17
卷期号:16 (42)
被引量:29
标识
DOI:10.1002/smll.202004129
摘要
Abstract Herein, it is demonstrated that N‐rich carbonized silk fibroin materials (CSFs) can serve as efficient peroxidase, and oxidase mimics. Their enzyme‐like activities are highly dependent on carbonization conditions. CSFs obtained at low temperatures do not exhibit significant catalytic reactivity, while their enzyme‐like catalysis performance is greatly activated after high‐temperature treatment. Such a phenomenon is mainly ascribed to the increase of graphitization degree and graphitic nitrogen and the emergence of disordered graphitic structures during the formation of turbostratic carbon. In addition, inspired by the excellent photothermal conversion efficiency, and temperature‐dependent catalytic behavior of CSFs, near‐infrared light can be used to remotely control their enzyme‐like activities. More importantly, as‐prepared robust silk‐derived nanosheets can be applied to photothermal‐catalytic cancer therapy and sensing. It is believed that such a smart artificial enzyme system will throw up exciting new opportunities for the chemical industry and biotechnology.
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