Issue 66, 2016, Issue in Progress

Photothermal conversion upon near-infrared irradiation of fluorescent carbon nanoparticles formed from carbonized polydopamine

Abstract

Fluorescence and photothermal conversion mediated by near-infrared radiation (NIR) is reported for carbonized polydopamine nanoparticles. Carbonized polydopamine demonstrated excitation-dependent fluorescence emission, together with NIR-responsive photothermal conversion properties. The concentration-dependent photothermal heating from carbonized fluorescent carbon nanoparticles-polydopamine (FNP-pDA) induces hyperthermal killing of both cancer cell lines and bacteria in vitro. Although most of the dopamine moieties of polydopamine become dehydrated upon carbonization, the remaining dopamine-hydroxyl groups can confer adhesive properties. These fluorescent coatings are compatible with many substrates, and the surface passivation of FNP-pDA with polyethylene glycol improves quantum yield and extends fluorescence lifetimes. The novel infrared-responsive photothermal and fluorescent carbon nanoparticles reported here show promise for a range of potential biomedical and research applications.

Graphical abstract: Photothermal conversion upon near-infrared irradiation of fluorescent carbon nanoparticles formed from carbonized polydopamine

Supplementary files

Article information

Article type
Paper
Submitted
30 Mar 2016
Accepted
19 Jun 2016
First published
22 Jun 2016

RSC Adv., 2016,6, 61482-61491

Photothermal conversion upon near-infrared irradiation of fluorescent carbon nanoparticles formed from carbonized polydopamine

S. H. Kim, S. Md. Sharker, H. Lee, I. In, K. D. Lee and S. Y. Park, RSC Adv., 2016, 6, 61482 DOI: 10.1039/C6RA08196G

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