Fluorescent Carbon Dots Capped with PEG(200) and Mercaptosuccinic Acid

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Helena Goncalves (Author) Other; Joaquim C G Esteves da Silva (Author) FCUP

Journal

Title: Journal of Fluorescence

Vol. 20

Pages: 1023-1028

ISSN: 1053-0509

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 74 Citations

Scopus - 79 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Physical sciences > Chemistry > Inorganic chemistry ; Physical sciences > Chemistry > Analytical chemistry > Spectrochemistry

Other information

Authenticus ID: P-003-3KJ

DOI: 10.1007/s10895-010-0652-y

Abstract (EN): The synthesis and functionalization of carbon nanoparticles with PEG(200) and mercaptosuccinic acid, rendering fluorescent carbon dots, is described. Fluorescent carbon dots (maximum excitation and emission at 320 and 430 nm, respectively) with average dimension 267 nm were obtained. The lifetime decay of the functionalized carbon dots is complex and a three component decay time model originated a good fit with the following lifetimes: tau (1) = 2.71 ns; tau (2) = 7.36 ns; tau (3) = 0.38 ns. The fluorescence intensity of the carbon dots is affected by the solvent, pH (apparent pK (a) of 7.4 +/- 0.2) and iodide (Stern-Volmer constant of 78 +/- 2 M-1).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6