Semiconductor/Carbon Quantum Dot‐based Hue Recognition Strategy for Point of Need Testing: A Review

• Published in: ChemistryOpen (Weinheim) Vol. 12; no. 4; pp. e202200165 - n/a
• Main Authors: Li, Daquan, Wang, Jing
• Format: Journal Article
• Language: English
• Published: Germany John Wiley & Sons, Inc 01.04.2023; John Wiley and Sons Inc; Wiley-VCH
• Subjects: Analytical chemistry; Carbon; Carbon dots; Color; Economic analysis; Evolution; Fluorescence; hue; Nanomaterials; Optics; Photoreceptors; point-of-need testing; quantum dot; Quantum dots; ratiometric fluorescence; Recognition; Reproducibility; Retina; Review; Reviews; Sensors; Smartphones; Substrates; test paper; quantum dot; hue; test paper; ratiometric fluorescence; point-of-need testing
• ISSN: 2191-1363; 2191-1363
• DOI: 10.1002/open.202200165

The requirement to establish novel methods for visual detection is attracting attention in many application fields of analytical chemistry, such as, healthcare, environment, agriculture, and food. The research around subjects like “point‐of‐need”, “hue recognition”, “paper‐based sensor”, “fluorescent sensor”, etc. has been always aimed at the opportunity to manufacture convenient and fast‐response devices to be used by non‐specialists. It is possible to achieve economic rationality and technical simplicity for optical sensing toward target analytes through introduction of fluorescent semiconductor/carbon quantum dot (QD) and paper‐based substrates. In this Review, the mechanisms of anthropic visual recognition and fluorescent visual assays, characteristics of semiconductor/carbon QDs and ratiometric fluorescence test paper, and strategies of semiconductor/carbon QD‐based hue recognition are described. We cover latest progress in the development and application of point‐of‐need sensors for visual detection, which is based on a semiconductor/carbon quantum dot‐based hue recognition strategy generated by ratiometric fluorescence technology. The construction strategies and application fields including cations, anions, small molecules, biomarkers and pH sensing of semiconductor/carbon quantum dot‐based hue recognition for point of need testing. And the mentioned hue is generated by ratiometric fluorescence technique using two or more fluorescent signals with different amounts of reference signal and response signal.