Aminopyrazole-based ligand induces gold nanoparticle formation and remains available for heavy metal ions sensing. A simple "Mix and Detect" approach

Gemma Aragay, Josefina Pons, Josep Ros, Arben Merkoci

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)

Abstract

A novel way to synthesize gold nanoparticles based on the use of N-alkylaminopyrazole is shown. This ligand has a triple functionality: induces AuNPs formation, stabilizes the formed nanoparticles, and even remains available for an external coordination with heavy metal ions. The availability of N-alkylaminopyrazole ligands onto the AuNPs surface is studied using UV-vis and NMR techniques. The mechanism of formation of AuNPs along with the synthesis optimization and characterization are studied using voltammetry and UV-vis, and the results are discussed in detail. The application of N-alkylaminopyrazole- derived gold nanoparticles in the heavy metal ions sensing is also tested showing a high sensitivity for mercury detection at low concentration level. The functionalization of metal nanoparticles with these receptors followed by heavy metal ions detection represents a simple "mix and detect" approach with interest for several other sensing applications. © 2010 American Chemical Society.
Original languageEnglish
Pages (from-to)10165-10170
JournalLangmuir
Volume26
Issue number12
DOIs
Publication statusPublished - 15 Jun 2010

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