In:
Nanoscale Research Letters, Springer Science and Business Media LLC, Vol. 17, No. 1 ( 2022-10-31)
Abstract:
Highly sensitive, simple and reliable colorimetric probe for Cu 2+ -ion detection was visualized with the L-cysteine functionalized gold nanoparticle (LS-AuNP) probes. The pronounced sensing of Cu 2+ with high selectivity was rapidly featured with obvious colour change that enabled to visually sense Cu 2+ ions by naked eyes. By employing systemic investigations on crystallinities, elemental compositions, microstructures, surface features, light absorbance, zeta potentials and chemical states of LS-AuNP probes, the oxidation-triggered aggregation effect of LS-AuNP probes was envisioned. The results indicated that the mediation of Cu 2+ oxidation coordinately caused the formation of disulfide cystine, rendering the removal of thiol group at AuNPs surfaces. These features reflected the visual colour change for the employment of tracing Cu 2+ ions in a quantitative way.
Type of Medium:
Online Resource
ISSN:
1556-276X
DOI:
10.1186/s11671-022-03742-z
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
2253244-4
detail.hit.zdb_id:
3149496-1
