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In Situ Growth of CuWO4 Nanospheres over Graphene Oxide for Photoelectrochemical (PEC) Immunosensing of Clinical Biomarker
Beijing Univ Chem Technol, Peoples R China.
Beijing Univ Chem Technol, Peoples R China; Beijing Univ Chem Technol, Peoples R China.
Shah Abdul Latif Univ Khairpur, Pakistan.
Beijing Univ Chem Technol, Peoples R China.
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2020 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, SENSORS, Vol. 20, no 1, article id 148Article in journal (Refereed) Published
Abstract [en]

Procalcitonin (PCT) protein has recently been identified as a clinical marker for bacterial infections based on its better sepsis sensitivity. Thus, an increased level of PCT could be linked with disease diagnosis and therapeutics. In this study, we describe the construction of the photoelectrochemical (PEC) PCT immunosensing platform based on it situ grown photo-active CuWO4 nanospheres over reduced graphene oxide layers (CuWO4@rGO). The in situ growth strategy enabled the formation of small nanospheres (diameter of 200 nm), primarily composed of tiny self-assembled CuWO4 nanoparticles (2-5 nm). The synergic coupling of CuWO4 with rGO layers constructed an excellent photo-active heterojunction for photoelectrochemical (PEC) sensing. The platform was then considered for electrocatalytic (EC) mechanism-based detection of PCT, where inhibition of the photocatalytic oxidation signal of ascorbic acid (AA), subsequent to the antibody-antigen interaction, was recorded as the primary signal response. This inhibition detection approach enabled sensitive detection of PCT in a concentration range of 10 pgmL(-1) to 50 ng.mL(-1) with signal sensitivity achievable up to 0.15 pgmL(-1). The proposed PEC hybrid (CuWO4@rGO) could further be engineered to detect other clinically important species.

Place, publisher, year, edition, pages
MDPI, 2020. Vol. 20, no 1, article id 148
Keywords [en]
CuWO4 nanostructures; procalcitonin; graphene oxide; immunosensor
National Category
Microbiology in the medical area
Identifiers
URN: urn:nbn:se:liu:diva-163669DOI: 10.3390/s20010148ISI: 000510493100148PubMedID: 31881686Scopus ID: 2-s2.0-85077281268OAI: oai:DiVA.org:liu-163669DiVA, id: diva2:1393947
Note

Funding Agencies|National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China [51572011, 51802012]

Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-03-12Bibliographically approved

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