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Water-stable perovskite-on-polymer fluorescent microspheres for simultaneous monitoring of pH, urea, and urease

Jia An, Meizhu Chen, Guoyi Liu, Yongqin Hu, Rubing Chen, Ying Lyu, Sanjiv Sharma Orcid Logo, Yufei Liu

Analytical and Bioanalytical Chemistry, Volume: 413, Issue: 6, Pages: 1739 - 1747

Swansea University Authors: Sanjiv Sharma Orcid Logo, Yufei Liu

Abstract

Perovskite materials have attracted attention due to their excellent optical and electrical properties; however, their unsatisfactory stability limits their application in biochemical detection. In this paper, CsPbBr3 perovskite quantum dots were successfully encapsulated in poly(styrene/acrylamide)...

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Published in: Analytical and Bioanalytical Chemistry
ISSN: 1618-2642 1618-2650
Published: Springer Science and Business Media LLC 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56139
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Abstract: Perovskite materials have attracted attention due to their excellent optical and electrical properties; however, their unsatisfactory stability limits their application in biochemical detection. In this paper, CsPbBr3 perovskite quantum dots were successfully encapsulated in poly(styrene/acrylamide) microspheres, using a swelling–shrinking method. The manufactured perovskite microspheres (PDPS composites) not only maintained strong photoluminescence (PL) stability but also demonstrated great water solubility. Additionally, a real-time pH monitoring platform was constructed based on the prepared PDPS composites and dopamine, and the system showed a good linear relationship in a pH range of 4–12. Furthermore, urea could be hydrolyzed to produce hydroxyl groups, thereby increasing the pH of the solution. Therefore, this system was then extended for urea and urease detection. As a result, the detection limits of urea and urease were recorded as 1.67 μM and 2.1 mU/mL, respectively. This development provides an interesting demonstration of the expanding list of applications of perovskite materials.
Keywords: Perovskite quantum dots; PS-PAA microspheres; pH sensing; Urea/urease monitoring
College: College of Engineering
Issue: 6
Start Page: 1739
End Page: 1747