We have developed a selective upconversion switching method for the ratiometric
fluorescence detection of nitrite using upconversion nanoparticles (UCNPs) and an efficient …

For the widely used gold nanoparticles (AuNPs)-based colorimetric probes, AuNPs
generally change from dispersion to aggregation state accompanying with corresponding …

We synthesize Au@ Ag core/shell nanoparticles (NPs) using a Au NP assisted Tollens
reaction. The as-synthesized NPs are used for the colorimetric cyanide sensing with a …

Gold nanoparticles are popularly used in biological and chemical sensors and their
applications owing to their fascinating chemical, optical, and catalytic properties. Particularly …

A simple colorimetric method with high sensitivity and selectivity was developed for sensing
of nitrite as low as 4.0 μM by naked eyes, which is based on etching of gold nanorods …

We report here a facile colorimetric sensor based on the N-acetyl-l-cysteine (NALC)-
stabilized Ag nanoparticles (NALC–Ag NPs) for detection of Fe 3+ ions in aqueous solution …

The discovery of the DNA-mediated assembly of gold nanoparticles was a great moment in
the history of science; this understanding and chemical control enabled the rational design …

We report the visual detection of Al3+ using unlabeled gold nanoparticles (AuNPs) based on
the complexation of Al3+ with citric acid, resulting in the aggregation of AuNPs. The …

The design of nanostructures with controlled surface chemistry for sensing, catalytic, and
electronic applications is an important research challenge. Sensing platforms based on the …

Plasmonic metal nanoparticles (NPs) exhibit size, shape, and composition-dependent
optical properties and have been studied extensively in the field of biosensing, but wide …