Strain Effect in Palladium Nanostructures as Nanozymes
Abstract
While various effects of physicochemical parameters (e.g., size, facet, composition, and internal structure) on the catalytic efficiency of nanozymes (i.e., nanoscale enzyme mimics) have been studied, the strain effect has never been reported and understood before. Herein, we demonstrate the strain effect in nanozymes by using Pd octahedra and icosahedra with peroxidase-like activities as a model system. Strained Pd icosahedra were found to display 2-fold higher peroxidase-like catalytic efficiency than unstrained Pd octahedra. Theoretical analysis suggests that tensile strain is more beneficial to OH radical (a key intermediate for the catalysis) generation than compressive strain. Pd icosahedra are more active than Pd octahedra because icosahedra amplify the surface strain field. As a proof-of-concept demonstration, the strained Pd icosahedra were applied to an immunoassay of biomarkers, outperforming both unstrained Pd octahedra and natural peroxidases. The findings in this research may serve as a strong foundation to guide the design of high-performance nanozymes.
- Authors:
-
[1];
[1];
[1];
[1];
[3];
[2];
[1]
- Univ. of Central Florida, Orlando, FL (United States)
- Louisiana State Univ., Baton Rouge, LA (United States)
- Brown Univ., Providence, RI (United States)
- Publication Date:
- Research Org.:
- Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1594049
- Alternate Identifier(s):
- OSTI ID: 1656777
- Grant/Contract Number:
- SC0018408
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: 1; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Palladium nanostructures; strain effect; enzyme mimic; catalysis; immunoassay
Citation Formats
Xi, Zheng, Cheng, Xun, Gao, Zhuangqiang, Wang, Mengjing, Cai, Tong, Muzzio, Michelle, Davidson, Edwin, Chen, Ou, Jung, Yeonwoong, Sun, Shouheng, Xu, Ye, and Xia, Xiaohu. Strain Effect in Palladium Nanostructures as Nanozymes. United States: N. p., 2019.
Web. doi:10.1021/acs.nanolett.9b03782.
Xi, Zheng, Cheng, Xun, Gao, Zhuangqiang, Wang, Mengjing, Cai, Tong, Muzzio, Michelle, Davidson, Edwin, Chen, Ou, Jung, Yeonwoong, Sun, Shouheng, Xu, Ye, & Xia, Xiaohu. Strain Effect in Palladium Nanostructures as Nanozymes. United States. https://doi.org/10.1021/acs.nanolett.9b03782
Xi, Zheng, Cheng, Xun, Gao, Zhuangqiang, Wang, Mengjing, Cai, Tong, Muzzio, Michelle, Davidson, Edwin, Chen, Ou, Jung, Yeonwoong, Sun, Shouheng, Xu, Ye, and Xia, Xiaohu. Tue .
"Strain Effect in Palladium Nanostructures as Nanozymes". United States. https://doi.org/10.1021/acs.nanolett.9b03782. https://www.osti.gov/servlets/purl/1594049.
@article{osti_1594049,
title = {Strain Effect in Palladium Nanostructures as Nanozymes},
author = {Xi, Zheng and Cheng, Xun and Gao, Zhuangqiang and Wang, Mengjing and Cai, Tong and Muzzio, Michelle and Davidson, Edwin and Chen, Ou and Jung, Yeonwoong and Sun, Shouheng and Xu, Ye and Xia, Xiaohu},
abstractNote = {While various effects of physicochemical parameters (e.g., size, facet, composition, and internal structure) on the catalytic efficiency of nanozymes (i.e., nanoscale enzyme mimics) have been studied, the strain effect has never been reported and understood before. Herein, we demonstrate the strain effect in nanozymes by using Pd octahedra and icosahedra with peroxidase-like activities as a model system. Strained Pd icosahedra were found to display 2-fold higher peroxidase-like catalytic efficiency than unstrained Pd octahedra. Theoretical analysis suggests that tensile strain is more beneficial to OH radical (a key intermediate for the catalysis) generation than compressive strain. Pd icosahedra are more active than Pd octahedra because icosahedra amplify the surface strain field. As a proof-of-concept demonstration, the strained Pd icosahedra were applied to an immunoassay of biomarkers, outperforming both unstrained Pd octahedra and natural peroxidases. The findings in this research may serve as a strong foundation to guide the design of high-performance nanozymes.},
doi = {10.1021/acs.nanolett.9b03782},
journal = {Nano Letters},
number = 1,
volume = 20,
place = {United States},
year = {Tue Dec 10 00:00:00 EST 2019},
month = {Tue Dec 10 00:00:00 EST 2019}
}
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