Highly sensitive and selective liquid crystal optical sensor for detection of ammonia.
TLDR
A highly sensitive and selective optical sensor for detection of ammonia (NH3) based on liquid crystals (LCs) that can be a sensitive detection platform for other molecule monitors such as proteins, DNAs and other heavy metal ions by modifying sensing molecules.Abstract:
Ammonia detection technologies are very important in environment monitoring. However, most existing technologies are complex and expensive, which limit the useful range of real-time application. Here, we propose a highly sensitive and selective optical sensor for detection of ammonia (NH3) based on liquid crystals (LCs). This optical sensor is realized through the competitive binding between ammonia and liquid crystals on chitosan-Cu2+ that decorated on glass substrate. We achieve a broad detection range of ammonia from 50 ppm to 1250 ppm, with a low detection limit of 16.6 ppm. This sensor is low-cost, simple, fast, and highly sensitive and selective for detection of ammonia. The proposal LC sensing method can be a sensitive detection platform for other molecule monitors such as proteins, DNAs and other heavy metal ions by modifying sensing molecules.read more
Citations
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Thermotropic Liquid Crystal-Assisted Chemical and Biological Sensors
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Seeing the Unseen: The Role of Liquid Crystals in Gas-Sensing Technologies.
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Dye-liquid-crystal-based biosensing for quantitative protein assay
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