Results 211 to 220 of about 22,772 (255)
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Reversible Colorimetric Probes for Mercury Sensing
Journal of the American Chemical Society, 2005The selectivity and sensitivity of two colorimetric sensors based on the ruthenium complexes N719 [bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) bis(tetrabutylammonium) bis(thiocyanate)] and N749 [(2,2':6',2' '-terpyridine-4,4',4' '-tricarboxylate)ruthenium(II) tris(tetrabutylammonium) tris(isothiocyanate)] are described.
Coronado, Eugenio +7 more
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Functionalized silver nanoparticles as colorimetric probes for sensing tricyclazole
Food Chemistry, 2021A colorimetric assay for highly selective and sensitive detection of tricyclazole using fluorescein-functionalized silver nanoparticles (F-AgNPs) as sensing probes was investigated. As the addition of tricyclazole to F-AgNPs, a drastic decrease in the absorbance at 394 nm was detected, which was accompanied with a noticeable color change from yellow to
Yen-Chang, Su +3 more
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Light-Controlled Configurable Colorimetric Sensing Array
Analytical Chemistry, 2019Colorimetry 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 +5 more
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Colorimetric sensing of selenocystine using gold nanoparticles
Analytical Biochemistry, 2017We 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 +3 more
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Biomolecular Sensing with Colorimetric Vesicles
2007This chapter summarizes recent studies employing colorimetric vesicle-based systems for biomolecular sensing. Vesicular aggregates exhibit an important advantage as a biological sensing platform in that they mimic the cell membrane—the site of molecular docking, ligand–receptor binding, and other important processes that can be exploited as a means of ...
Raz Jelinek, Sofiya Kolusheva
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Physical amplification of chemical colorimetric sensing
Advanced Environmental, Chemical, and Biological Sensing Technologies XV, 2019Rapid and sensitive detection of hazardous chemicals is essential for worker safety in industrial environments and for soldier safety in the field. In this work, we propose a physical coloration platform to passively amplify existing colorimetric sensing mechanisms.
Rachel Odessey +6 more
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Progress in the design of portable colorimetric chemical sensing devices
Nanoscale, 2023Developement of portable colorimetric devices for detection of heavy metals, anions, biomolecules, pesticides, drugs, and other substances is vital across clinical, environmental, and food safety domains.
Tushar Kant +5 more
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Plasmonic platforms for colorimetric sensing of cysteine
Applied Spectroscopy Reviews, 2015AbstractCysteine plays a crucial role in physiological processes, as well as in the food, pharmaceutical, and even personal care industries, which is of great significance to control its concentration. Plasmonic nanomaterials have attracted increasing interest in colorimetric sensing, due to their outstanding optical, chemical, and catalytic properties.
Rong Sheng Li +4 more
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Colorimetric sensing ensemble for citrate in water
Sensors and Actuators B: Chemical, 2014Abstract A copper(II)-assisted guanidiniocarbonyl pyrrole receptor 1-Cu 2+ was synthesized, and its binding properties toward some organic acids were determined in aqueous solution. This receptor exhibited high selectivity and affinity for citrate over other similar analytes, the association constant reached 10 5 M −1 in protic media at ...
Yimin Sun +4 more
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Fiber-based chemical sensing and sensing platforms with colorimetric dyes
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIX, 2018Chemical warfare agents (CWAs) such as nerve and blister agents are expected to pose continuing and growing dangers for the Warfighter in the future. We investigate a novel chemical detection modality, based on a new platform for colorimetric detection of chemical threats incorporated in hollow fibers, which are miniature in two dimensions and ...
Rachel Odessey +12 more
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