Porous Au@Pt nanoparticles with superior peroxidase-like activity for colorimetric detection of spike protein of SARS-CoV-2

Zhao Fu; Weilun Zeng; Shuangfei Cai; Haolin Li; Jianwei Ding; Chen Wang; Yunfa Chen; Ning Han; Rong Yang

doi:10.1016/j.jcis.2021.06.170

Porous Au@Pt nanoparticles with superior peroxidase-like activity for colorimetric detection of spike protein of SARS-CoV-2

J Colloid Interface Sci. 2021 Dec 15:604:113-121. doi: 10.1016/j.jcis.2021.06.170. Epub 2021 Jul 5.

Authors

Zhao Fu¹, Weilun Zeng², Shuangfei Cai³, Haolin Li², Jianwei Ding¹, Chen Wang¹, Yunfa Chen⁴, Ning Han⁴, Rong Yang⁵

Affiliations

¹ CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Center of Materials Science and Optoelectronics Engineering, CAS center for Excellence in Nanoscience, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China.
² CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Center of Materials Science and Optoelectronics Engineering, CAS center for Excellence in Nanoscience, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China; Sino-Danish College, Sino-Danish Center for Education and Research, University of Chinese Academy of Sciences, Beijing, China.
³ CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Center of Materials Science and Optoelectronics Engineering, CAS center for Excellence in Nanoscience, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China. Electronic address: caisf@nanoctr.cn.
⁴ State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China.
⁵ CAS Key Lab for Biomedical Effects of Nanomaterials and Nanosafety, Center of Materials Science and Optoelectronics Engineering, CAS center for Excellence in Nanoscience, National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China; Sino-Danish College, Sino-Danish Center for Education and Research, University of Chinese Academy of Sciences, Beijing, China. Electronic address: yangr@nanoctr.cn.

Abstract

The development of colorimetric assays for rapid and accurate diagnosis of coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is of practical importance for point-of-care (POC) testing. Here we report the colorimetric detection of spike (S1) protein of SARS-CoV-2 based on excellent peroxidase-like activity of Au@Pt nanoparticles, with merits of rapidness, easy operation, and high sensitivity. The Au@Pt NPs were fabricated by a facile seed-mediated growth approach, in which spherical Au NPs were premade as seeds, followed by the Pt growth on Au seeds, producing uniform, monodispersed and porous Au@Pt core-shell NPs. The as-obtained Au@Pt NPs showed a remarkable enhancement in the peroxidase-mimic catalysis, which well abided by the typical Michaelis-Menten theory. The enhanced catalysis of Au@Pt NPs was ascribed to the porous nanostructure and formed electron-rich Pt shells, which enabled the catalytic pathway to switch from hydroxyl radical generation to electron transfer process. On a basis of these findings, a colorimetric assay of spike (S1) protein of SARS-CoV-2 was established, with a linear detection range of 10-100 ng mL^-1 of protein concentration and a low limit of detection (LOD) of 11 ng mL^-1. The work presents a novel strategy for diagnosis of COVID-19 based on metallic nanozyme-catalysis.

Keywords: Catalysis; Colorimetric Detection; Mechanism; Nanozyme; SARS-CoV-2 spike protein.

MeSH terms

Colorimetry*
Gold*
Metal Nanoparticles*
Peroxidases
Porosity
SARS-CoV-2
Spike Glycoprotein, Coronavirus / isolation & purification*

Substances

Spike Glycoprotein, Coronavirus
spike protein, SARS-CoV-2
Gold
Peroxidases