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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Silver nanoparticle anchored carbon dots for improved sensing, catalytic and intriguing antimicrobial activity
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Silver nanoparticle anchored carbon dots for improved sensing, catalytic and intriguing antimicrobial activity

机译：银纳米颗粒锚定的碳点，可改善感测，催化和令人感兴趣的抗菌活性

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摘要

Fluorescent carbon dots (NSCDs) with a size of similar to 5 nm (lambda(ex) = 320 nm and lambda(em) = 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 x 10(-5) M admixed in 1 M water. Thus, acetone induced hybrid particles with a sharp plasmon band (lambda(ex) = 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.
机译：在多巴胺和半胱氨酸的碱性混合物回流下合成了大小近似于5 nm（λ（ex）= 320 nm和λ（em）= 386 nm）的荧光碳点（NSCD）。将合成的NSCD与通过在室温下混合AgNO3而获得的原位生成的银纳米颗粒（AgNP）杂交。由于局部表面等离振子共振（LSPR）的作用，NSCDs丰富了AgNPs的等离激元带。取决于丙酮浓度，等离激元能带的进一步富集使丙酮感测低至混合在1 M水中的8 x 10（-5）M。因此，具有尖峰等离激元带（λ（ex）= 410 nm）的丙酮诱导的杂化颗粒成为硫化物传感平台。此外，已证明真空干燥的稳定颗粒（有或没有丙酮）是选择性还原阳离子染料的极佳催化剂，并且它们表现出令人着迷的抗菌活性。这两种类型的干燥颗粒的作用不同，这使我们能够根据催化作用和细菌生长来区分其改变的表面功能。

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