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Horseradish Peroxidase-Encapsulated Fluorescent Bio-Nanoparticle for Ultra-Sensitive and Easy Detection of Hydrogen Peroxide.
- Source :
- Biosensors (2079-6374); Feb2023, Vol. 13 Issue 2, p289, 13p
- Publication Year :
- 2023
-
Abstract
- Hydrogen peroxide (H<subscript>2</subscript>O<subscript>2</subscript>) has been a fascinating target in various chemical, biological, clinical, and industrial fields. Several types of fluorescent protein-stabilized gold nanoclusters (protein-AuNCs) have been developed for sensitive and easy detection of H<subscript>2</subscript>O<subscript>2</subscript>. However, its low sensitivity makes is difficult to measure negligible concentrations of H<subscript>2</subscript>O<subscript>2</subscript>. Therefore, to overcome this limitation, we developed a horseradish peroxidase-encapsulated fluorescent bio-nanoparticle (HEFBNP), comprising bovine serum albumin-stabilized gold nanoclusters (BSA-AuNCs) and horseradish peroxidase-stabilized gold nanoclusters (HRP-AuNCs). The fabricated HEFBNP can sensitively detect H<subscript>2</subscript>O<subscript>2</subscript> owing to its two properties. The first is that HEFBNPs have a continuous two-step fluorescence quenching mechanism, which comes from the heterogenous fluorescence quenching mechanism of HRP-AuNCs and BSA-AuNCs. Second, the proximity of two protein-AuNCs in a single HEFBNP allows a reaction intermediate (•OH) to rapidly reach the adjacent protein-AuNCs. As a result, HEFBNP can improve the overall reaction event and decrease the loss of intermediate in the solution. Due to the continuous quenching mechanism and effective reaction event, a HEFBNP-based sensing system can measure very low concentrations of H<subscript>2</subscript>O<subscript>2</subscript> up to 0.5 nM and show good selectivity. Furthermore, we design a glass-based microfluidic device to make it easier use HEFBNP, which allowed us to detect H<subscript>2</subscript>O<subscript>2</subscript> with the naked eye. Overall, the proposed H<subscript>2</subscript>O<subscript>2</subscript> sensing system is expected to be an easy and highly sensitive on-site detection tool in chemistry, biology, clinics, and industry fields. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20796374
- Volume :
- 13
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Biosensors (2079-6374)
- Publication Type :
- Academic Journal
- Accession number :
- 162084054
- Full Text :
- https://doi.org/10.3390/bios13020289