High Carbonization Temperature to Trigger Enzyme Mimicking Activities of Silk-Derived Nanosheets.,Small

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High Carbonization Temperature to Trigger Enzyme Mimicking Activities of Silk-Derived Nanosheets.
Small ( IF 13.0 ) Pub Date : 2020-09-17 , DOI: 10.1002/smll.202004129
Xueqing Xiong ₁ , Yonghua Tang ₁ , Chengjie Xu ₁ , Yanyan Huang ₂ , Yupeng Wang ₃ , Lianlian Fu ₄ , Changxu Lin ₁ , Dongfang Zhou ₃ , Youhui Lin ₁

Affiliation

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.

中文翻译：

高碳化温度可触发丝衍生纳米片的酶模拟活性。

在此证明，富N的碳化丝素蛋白材料（CSF）可以用作有效的过氧化物酶和氧化酶模拟物。它们的酶样活性高度依赖于碳化条件。低温获得的脑脊液没有明显的催化反应活性，而高温处理后其酶样催化性能被大大激活。这种现象主要归因于在层状碳形成过程中石墨化程度和石墨氮的增加以及石墨结构无序的出现。此外，由于出色的光热转换效率和CSF的温度依赖性催化行为，近红外光可用于远程控制其酶样活性。更重要的是，制备的坚固的，来源于丝绸的纳米片可以用于光热催化癌症的治疗和传感。人们相信，这种智能的人造酶系统将为化学工业和生物技术带来令人兴奋的新机遇。

更新日期：2020-10-22

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