A full-wavelength coverage colorimetric sensor depending on polymer-carbon nanodots from blue to red for visual detection of nitrite via smartphone. (July 2021)

• Record Type: Journal Article
• Authors: Wang, Rui; Ruan, Guotong; Sun, Yujie; Zhao, Duoduo; Yu, Haidong; Zhang, Cheng-Wu; Li, Lin; Liu, Jinhua
• Is Part Of: Dyes and pigments. Volume 191(2021)
• Publication Date: 2021-07
• Subjects: Polymer-carbon nanodots -- Full-wavelength -- Visual detection -- Colorimetric sensor -- Nitrite; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109383
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A key challenge for preparing colorimetric sensor is to achieve full-wavelength color change under visible light. Herein, a full-wavelength coverage visible light-stimulated colorimetric sensor for specific detection of NO2 − is constructed with polymer-carbon nanodots (PCNDs). The developed sensor is based on the principle that the fluorescence of PCNDs can be excited by visible light and visualized with a black background owning to the front and back light being absorbed. The as-achieved sensor exhibits high sensitivity and selectivity for visualization detection of NO2 − in blue (from blue to orange) and red channel (from red to orange), respectively. Furthermore, a ColorAssist with a smartphone is used to obtain ΔRGB values for quantitative analysis of NO2 − based on color intensity. Importantly, the proposed sensor can be applied for on-site NO2 − detection in meat products with satisfied results. The developed strategy is not only portable and accessible for in situ analysis, but also has dual output color signal and full-wavelength coverage. As far as we know, this is the first full-wavelength coverage visible light-stimulated dual-channel colorimetric sensor for visual detection of NO2 − . Therefore, we believe that these studies will broaden the application of colorimetric sensor in on-site environmental monitoring and diseases diagnostic. Graphical abstract: Image 1 Highlights: We construct a full-wavelength coverage visible light-stimulated colorimetric sensor for detection of NO2 - by PCNDs. The fluorescence of PCNDs can be excited by visible light and visualized with a black background. The sensor exhibits high sensitivity and selectivity for visualization detection of NO2 - in blue and red channel. The proposed sensor can be applied in urine and meat products for on-site NO2 - detection with satisfied results.