Issue 47, 2023

Progress in the design of portable colorimetric chemical sensing devices

Abstract

The need for precise determination of heavy metals, anions, biomolecules, pesticides, drugs, and other substances is vital across clinical, environmental, and food safety domains. Recent years have seen significant progress in portable colorimetric chemical sensing devices, revolutionizing on-the-spot analysis. This review offers a comprehensive overview of these advancements, covering handheld colorimetry, RGB-based colorimetry, paper-based colorimetry, and wearable colorimetry devices. It explores the underlying principles, functional materials (chromophoric reagents/dyes and nanoparticles), detection mechanisms, and their applications in environmental monitoring, clinical care, and food safety. Noble metal nanoparticles (NPs) have arisen as promising substitutes in the realm of sensing materials. They display notable advantages, including heightened sensitivity, the ability to fine-tune their plasmonic characteristics for improved selectivity, and the capacity to induce visible color changes, and simplifying detection. Integration of NPs fabricated paper device with smartphones and wearables facilitates reagent-free, cost-effective, and portable colorimetric sensing, enabling real-time analysis and remote monitoring.

Graphical abstract: Progress in the design of portable colorimetric chemical sensing devices

Article information

Article type
Review Article
Submitted
31 Jul 2023
Accepted
27 Oct 2023
First published
22 Nov 2023

Nanoscale, 2023,15, 19016-19038

Progress in the design of portable colorimetric chemical sensing devices

T. Kant, K. Shrivas, A. Tejwani, K. Tandey, A. Sharma and S. Gupta, Nanoscale, 2023, 15, 19016 DOI: 10.1039/D3NR03803C

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