Volume 61, Issue 2 e202112453
Research Article

Cascaded Nanozyme System with High Reaction Selectivity by Substrate Screening and Channeling in a Microfluidic Device**

Dr. Qing Zhou

Dr. Qing Zhou

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

College of Chemistry and Material Science, Shandong Agricultural University, Taian, 271018 Shandong, China

Search for more papers by this author
Hong Yang

Hong Yang

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Xinghua Chen

Xinghua Chen

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Yuan Xu

Yuan Xu

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Dan Han

Dan Han

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Dr. Sisi Zhou

Dr. Sisi Zhou

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Prof. Songqin Liu

Prof. Songqin Liu

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Prof. Yanfei Shen

Prof. Yanfei Shen

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
Prof. Yuanjian Zhang

Corresponding Author

Prof. Yuanjian Zhang

Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Medical School, Southeast University, Nanjing, 211189 China

Search for more papers by this author
First published: 08 November 2021
Citations: 53
**

A previous version of this manuscript has been deposited on a preprint server (https://doi.org/10.26434/chemrxiv.12279947).

Graphical Abstract

The reaction selectivity of a nanozyme system was enhanced by screening and channeling of substrates. A catalytic cascade incorporating N-doped carbon nanocages with oxidase-like activity, and Prussian blue nanoparticles with peroxidase-like activity, improved reaction selectivity by more than 2000 times.

Abstract

Surpassing natural enzymes in cost, stability and mass production, nanozymes have attracted wide attention in fields from disease diagnosis to tumor therapy. However, nanozymes intrinsically have low reaction selectivity, which significantly restricts their applications. A general method is reported to address this challenge by following a biomimetic operation principle of substrates channeling and screening. Two oxidase- and peroxidase-like nanozymes (i.e., emerging N-doped carbon nanocages and Prussian blue nanoparticles), were cascaded as a proof of concept to improve the reaction selectivity in transforming the substrate into the targeted product by more than 2000 times. The cascaded nanozymes were also adopted to a spatially confined microfluidic device, leading to more than 100-fold enhancement of the reaction efficiency due to signal amplification.

Conflict of interest

The authors declare no conflict of interest.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.