Thiourea functionalized hydrogel photonic crystal sensor for Cd2+ detection

Silole‐Infiltrated Photonic Crystal Films as Effective Fluorescence Sensor for Fe3+ and Hg2+

“…In this work, the Fe 3+ /Hg 2+ can efficiently quench the FL of the HPS‐PC film with a detection limit as low as 5 n M , which is much lower than that reported in the literature 8d. 11b, 15a, 16c–d, 17b This approach gives excellent sensitivity toward Fe 3+ and Hg 2+ ions. Therefore, the HPS‐PC sensor would be sensitive for monitoring Fe 3+ and Hg 2+ ions in foodstuffs and environmental samples according to the maximum level of Fe 3+ (5.4 μ M ) and Hg 2+ (10 n M ) in drinking water permitted by the U.S. Environmental Protection Agency.…”

Highly sensitive ‘naked-eye’ colorimetric detection of thiourea using gold nanoparticles

“…As an important material, thiourea (TU) and its derivatives have been widely applied in various elds, including industry, medicine, agriculture and chemistry. [1][2][3][4][5][6][7][8][9][10][11] For instance, thiourea is usually used for electrodeposition of metals, rubber vulcanization, cleaning, detection, and leaching of gold in industry. [1][2][3][4][5][6] In agriculture, thiourea and its derivatives are also employed as a fertilizer, fungicide for some fruits, and inhibiter for the dormancy of seeds and tubers.…”

Nanoparticle-Hydrogel Composites: From Molecular Interactions to Macroscopic Behavior

“…The application of hydrogel-integrated CCA for the determination of analyte concentration through its effect on the swelling state, and determined based on diffraction from the CCA part, can be grouped into the size of the analyte, e.g., ions, molecules, and macromolecules. CCA embedded in hydrogels for the detection of ions includes, e.g., Pb 2+ [ 140 , 141 , 142 ], Hg 2+ [ 142 , 143 ], and Cd 2+ [ 144 ], which are all examples motivated by the need for the detection of toxic concentrations of heavy metal ions. In addition to the CCA part facilitating the readout process, the hydrogel constructs also need to include recognition moieties with high selectivity and sensitivity to support detection in an interesting analyte concentration range.…”