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A label-free non-aggregation colorimetric sensor has been designed for the detection of Cu 2+ , based on Cu 2+ catalyzing etching of gold nanorods (AuNRs) along longitudinal axis induced by dissolve oxygen in the presence of S 2 O 32− , which caused the aspect ratio (length/width) of AuNRs to decrease and the color of the solution to distinctly change. The linear...
Fe 3+ can catalyze H 2 O 2 to oxidize along on the longitudinal axis of gold nanorods (AuNRs), which caused the aspect ratio of AuNRs to decrease, longitudinal plasmon absorption band (LPAB) of AuNRs to blueshift (Δλ) and the color of the solution to change obviously. Thus, a rapid response and highly sensitive non-aggregation colorimetric sensor for the determination of Fe...
The CdS/TiO 2 –fluorescein isothiocyanate (FITC) luminescent nanoparticles (CdS/TiO 2 –FITC) with the particle size of 20nm have been synthesized by sol–gel method. CdS/TiO 2 –FITC could emit the fluorescence of both FITC and CdS/TiO 2 . The fluorescence resonance energy transfer (FRET) occurred between the donor CdS/TiO 2 and the acceptor FITC in the CdS/TiO...
Determination of perfluorinated compounds (PFCs) is very important because of their potential hazards to the environment and human health. In present work, 1,8-bis (tetramethylguanidino)-naphthalene (TMGN), a superbasic proton sponge, was firstly employed as the matrix for quantitative detection of acidic PFCs in environmental water samples by Matrix-assisted Laser Desorption/Ionization-Time of Flight...
A novel on-line coupled HPLC–hydride generation (HG)–ICP/MS system was developed for rapid, direct and sensitive speciation of methyltins in seawater without any pretreatment step. Methyltin compounds were separated by reversed phase HPLC, and then on-line reacted with potassium borohydride and acetic acid to generate volatile hydride products. The volatile derivatization products were separated in...
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