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Issue 47, 2015
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Silver nanoparticle anchored carbon dots for improved sensing, catalytic and intriguing antimicrobial activity

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Abstract

Fluorescent carbon dots (NSCDs) with a size of ∼5 nm (λex = 320 nm and λem = 386 nm) have been synthesized under reflux from an alkaline mixture of dopamine and cysteine. The synthesized NSCDs are hybridized with in situ generated silver nanoparticles (AgNPs) obtained by mixing AgNO3 at room temperature. NSCDs enrich the plasmonic bands of AgNPs due to the localized surface plasmon resonance (LSPR) effect. Further enrichment of plasmon band, depending on the acetone concentration, enables acetone sensing down to 8 × 10−5 M admixed in 1 M water. Thus, acetone induced hybrid particles with a sharp plasmon band (λex = 410 nm) become a sulfide sensing platform. Furthermore, vacuum dried stable particles (with or without acetone) have been proven to be an excellent catalyst for selective reduction of cationic dyes and they exhibit intriguing antimicrobial activity. These two types of dry particle act differently, which enables us to distinguish their altered surface functionalization in terms of catalysis and bacterial growth.

Graphical abstract: Silver nanoparticle anchored carbon dots for improved sensing, catalytic and intriguing antimicrobial activity

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Publication details

The article was received on 02 Oct 2015, accepted on 27 Oct 2015 and first published on 27 Oct 2015


Article type: Paper
DOI: 10.1039/C5DT03858H
Citation: Dalton Trans., 2015,44, 20692-20707
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    Silver nanoparticle anchored carbon dots for improved sensing, catalytic and intriguing antimicrobial activity

    J. Jana, S. S. Gauri, M. Ganguly, S. Dey and T. Pal, Dalton Trans., 2015, 44, 20692
    DOI: 10.1039/C5DT03858H

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