Results 271 to 280 of about 2,750,300 (344)

Light-Controlled Configurable Colorimetric Sensing Array

Analytical Chemistry, 2019
Colorimetry is a popular gas-sensing platform, but it is typically limited to one-time use only. Here, we introduce a light-controlled configurable colorimetric sensing array to overcome this limitation. It features a photoactivated reaction between an analyte and a sensing material, such that sensing of an array element can be turned on and off with ...
Jingjing Yu, Xingcai Qin, Di Wang, Chenwen Lin, Xiaojun Xian, Nongjian Tao   +5 more
openaire   +2 more sources

Monitoring the withering condition of leaves during black tea processing via the fusion of electronic eye (E-eye), colorimetric sensing array (CSA), and micro-near-infrared spectroscopy (NIRS)

Journal of Food Engineering, 2021
Withering of leaves is an important step in the processing of black tea and determines the taste and aroma of the tea. Currently, the withering degree of the leaves is mainly determined via sensory evaluation by the tea maker, and this is time-consuming ...
Yujie Wang, Ying Liu, Qingqing Cui, Luqing Li, Jingming Ning, Zhengzhu Zhang   +5 more
semanticscholar   +1 more source

Stretchable and Superwettable Colorimetric Sensing Patch for Epidermal Collection and Analysis of Sweat.

ACS Sensors, 2021
Stretchable and wearable sensors allow intimate integration with the human body for health and fitness monitoring. In addition to the acquisition of various physical parameters, quantitative analysis of chemical biomarkers present in sweat may provide ...
Kuikui Zhang, Jiaxue Zhang, Fenfang Wang, Desheng Kong   +3 more
semanticscholar   +1 more source

Target-induced gold nanoparticles colorimetric sensing coupled with aptamer for rapid and high-sensitivity detecting kanamycin.

Analytica Chimica Acta, 2022
Herein we report a novel colorimetric sensing strategy for the detection of kanamycin (kana) based on target-induced gold nanoparticles (AuNPs) coupled with aptamers.
Ranran Xu, Yongqiang Cheng, Xiaoxiao Qi, Xiaotong Li, Ziwei Zhang, Long Chen, Ting Sun, Zhenhui Gao, Meijia Zhu   +8 more
semanticscholar   +1 more source

Polyoxometalate functionalizing CeO2 hollow nanospheres as enhanced oxidase mimics for ascorbic acid colorimetric sensing.

Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2022
Phosphotungstic acid covered with CeO2 hollow nanospheres (CeO2@PTA HNSs) has been successfully prepared by a simple method, serving as highly efficient nanozymes for ascorbic acid (AA) colorimetric sensing. In virtue of the unique hollow nanostructures,
Tao Zhou, Tonglei Zhang, Yan Wang, Danhua Ge, Xiaojun Chen   +4 more
semanticscholar   +1 more source

Engineering porous Co-Mn oxide nanosheets with abundant oxygen vacancy as an efficient oxidase-like mimic for heparin colorimetric sensing.

Analytica Chimica Acta, 2022
Defects engineering as an effective strategy was widely utilized to modulate catalytic performance for heterogeneous catalysts through tuning surface electronic surface and creating more active sites.
Xue Wang, F. Wen, Liu-Liu He, Jia-Min Su, P. Jiang, D. He   +5 more
semanticscholar   +1 more source

Bioinspired angle-independent photonic crystal colorimetric sensing

Chemical Communications, 2013
An angle-independent photonic crystal (PhC) colorimetric sensor was developed by using a stimuli-response hydrogel to replicate the template arrays of isotropic photonic crystal beads (PCBs) for the detection of Hg(2+).
Baofen, Ye, Fei, Rong, Hongcheng, Gu, Zhuoying, Xie, Yao, Cheng, Yuanjin, Zhao, Zhongze, Gu   +6 more
openaire   +2 more sources

Colorimetric sensing of selenocystine using gold nanoparticles

Analytical Biochemistry, 2017
We present a highly selective and sensitive colorimetric method for the detection of selenocystine (SeCys) coexisting with other amino acids, especially cysteine (Cys) using the gold nanoparticles (AuNPs). Firstly, Cys was oxidized to cystine (Cys-Cys) by dissolved oxygen under Cu2+ catalysis in the pre-reaction, which eliminated the interference of ...
Liyang, Liu, Xia, Wang, Juan, Yang, Yan, Bai   +3 more
openaire   +2 more sources

Towards scalable plasmonic Fano-resonant metasurfaces for colorimetric sensing

Nanotechnology, 2022
Transitioning plasmonic metasurfaces into practical, low-cost applications requires meta-atom designs that focus on ease of manufacturability and a robustness with respect to structural imperfections and nonideal substrates.
Benjamin Cerjan, Burak Gerislioglu, S. Link, P. Nordlander, N. Halas, M. Griep   +5 more
semanticscholar   +1 more source

Plasmonic MoO3-x nanosheets by anodic oxidation of molybdenum for colorimetric sensing of hydrogen peroxide.

Analytica Chimica Acta, 2022
Hydrogen peroxide sensing is crucial for various medical diagnostics and industrial monitoring. On the other hand, doped metal oxides have recently emerged as cost-effective materials with localized surface plasmon resonance (LSPR) for colorimetric ...
Z. Ahmadzadeh, M. Ranjbar
semanticscholar   +1 more source