Abstract
This study presents a sensitive colorimetric probe for sensing Co2+ ions based on surface amine-modified iron oxide–silica core–shell nanoparticles (APTES–Fe@SiO2 NPs) and the appearance of an additional plasmonic peak in the UV–vis spectra due to NP aggregation. This colorimetric strategy based on the component dependence of core–shell NPs offered a highly sensitive and selective detection method for Co2+ ions. This cost-effective colorimetric probe afforded rapid, naked-eye detection of trace Co2+ ions at concentrations as low as 0.08mM. The amine moiety of APTES–Fe@SiO2 NPs readily formed the metal–amine configuration complex (λ980 peak) and induced the formation of Co NPs by self-seed generation (λ520, λ590, and λ630 peaks). Preliminary study data supported the promising practical applicability of the current method for the colorimetric detection of Co2+ ions in aqueous phase.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
