The gold-label-silver-stain method (GLSS) for DNA hybridization detection has been receiving increased interest as a colorimetric detective method, demonstrating the advantages of non-radioactivity, non-quenching effect of fluorescence and simplicity for analytical equipment. A colorimetric detection based on the GLSS method was applied to DNA arrays in situ synthesized on polypropylene (PP) sl...

Colorimetric detection of mercury ions (Hg(2+)) with the naked eye was accomplished within 1 min by a combination of non-crosslinking aggregation of double-stranded DNA-carrying gold nanoparticles and complex formation of thymine-Hg(2+)-thymine.

A novel colorimetric probe for the selective and sensitive detection of NO2 in solution and in air based on a BODIPY core containing an oxime group has been prepared.

Formation of gold nanoparticles in aqueous ethanol in the presence of pyridine-functionalized single-chain nanoparticles allows for the fast and highly sensitive colorimetric detection of zein corn protein.

A controlled assembly of natural beta-cyclodextrin modified Au NPs mediated by dopamine is demonstrated. Furthermore, a simple and sensitive colorimetric detection for dopamine is established by the concentration-dependent assembly.

Colorimetric and fluorescent dual detection of cysteine (Cys) and homocysteine (Hcy) has been realized based on the ionic self-assembly of a cationic polythiophene derivative with aromatic derivatives of Cys and Hcy formed in situ.

We developed a novel colorimetric method for rapid detection of biogenic amines based on arylalkylamine N-acetyltransferase (aaNAT). The proposed method offers distinct advantages including simple handling, high speed, low cost, good sensitivity and selectivity.

The metal-induced intramolecular cyclization reaction of an azo dye was exploited for the colorimetric detection of mercury ions in water. The molecular probe 3 responds selectively to nM-level Hg(II) ions in neutral aqueous solutions.

A novel colorimetric assay was established based on folic acid-conjugated porous Pd@Au nanoparticles possessing peroxidase-like activity as labels for the rapid detection of human chronic myelogenous leukemia cell lines (K-562).

By combining terminal protection of small molecule (folate)-capped DNA probes, exonuclease III signal amplification and gold nanoparticles, we developed a simple and label-free colorimetric assay for highly sensitive detection of folate receptor (FR). A detection limit of 50 fM FR was obtained using UV-vis spectrometry and 10 pM FR could be visualized by the naked eye.