Korea Institute of Science and Technology

Yunsik Nam

Kangbong Lee

Inhwan Oh

Sujin Lee

Yeonhee Lee

Kwonchul Noh

Disclosed are a selective colorimetric detection sensor and a colorimetric detection method for Cions using size controlled label-free gold nanoparticles, which may be useful for the detection of toxic materials such as heavy metal ions in the environmental sector and the industry. Selective colorimetric sensor solution used therein is selectively reacted with only Crions in trivalent chromium ions (Cr) and hexavalent chromium ions (Cr), and there is no interference effect resulting from other metal ions, and it is possible to very rapidly and precisely detect Crions compared to the related art.

Selective colorimetric detection sensor and selective colorimetric detection method for detecting hexavalent chromium ions using size controlled label-free gold nanoparticles

Disclosed are a colorimetric detection sensor and colorimetric detection method of a cyanide anion (CN) by etching of gold nanorods. The colorimetric detection sensor and colorimetric detection method use label-free nanorods having no modifier attached to a surface of gold nanorods (AuNRs), wherein the aspect ratio of nanorods, pH condition and/or amount of a surfactant are controlled to carry out selective etching and to cause a change in color only by CNso that CNcontained or dissolved in poison, water-contaminated environmental samples and legal evidence samples may be detected with ease, and show excellent selectivity, sensitivity and quantitative analyzability to CNto provide high usefulness.

Growing community of inventors

Seoul, South Korea

Yunsik Nam