<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dhenadhayalan, N.</style></author><author><style face="normal" font="default" size="100%">Lin, K.-C.</style></author><author><style face="normal" font="default" size="100%">Suresh, R.</style></author><author><style face="normal" font="default" size="100%">Ramamurthy, P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Unravelling the Multiple Emissive States in Citric-Acid-Derived Carbon Dots</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Physical Chemistry C</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Citric acid</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron transfer</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron transitions</style></keyword><keyword><style  face="normal" font="default" size="100%">Emission spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Emission spectrums</style></keyword><keyword><style  face="normal" font="default" size="100%">Excitation wavelength</style></keyword><keyword><style  face="normal" font="default" size="100%">Fluorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">Fluorescence spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Shorter wavelength</style></keyword><keyword><style  face="normal" font="default" size="100%">Surface domains</style></keyword><keyword><style  face="normal" font="default" size="100%">Surface functional groups</style></keyword><keyword><style  face="normal" font="default" size="100%">Time-resolved emission spectra</style></keyword><keyword><style  face="normal" font="default" size="100%">Time-resolved fluorescence spectroscopy</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2016</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955516013&amp;doi=10.1021%2facs.jpcc.5b08516&amp;partnerID=40&amp;md5=0421e5d1020ec6d0e669d6cb6760a6f6</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><volume><style face="normal" font="default" size="100%">120</style></volume><pages><style face="normal" font="default" size="100%">1252-1261</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Steady-state and time-resolved fluorescence spectroscopy techniques were used to probe multifluorescence resulting from citric-acid-derived carbon dots (C-dots). Commonly, both carboxyl-/amine-functionalized C-dots exhibit three distinct emissive states corresponding to the carbon-core and surface domain. The shorter-wavelength fluorescence (below 400 nm) originates from the carbon-core absorption band at ∼290 nm, whereas the fluorescence (above 400 nm) is caused by two surface states at ∼350 and 385 nm. In addition to three emissive states, a molecular state was also found in amine-functionalized C-dots. Time-resolved emission spectra (TRES) and time-resolved area normalized emission spectra (TRANES) were analyzed to confirm the origin of excitation wavelength-dependent fluorescence of C-dots. The surface functional groups on the C-dots are capable of regulating the electron transfer to affect the multifluorescence behavior. The electron transfer takes place from the carbon-core to surface domain by the presence of -COOH on the surface and vice versa for the case of -NH2 present on the surface. To the best of our knowledge, this is the first report that the multiemissive states are probed in C-dots systems using TRES and TRANES analyses, and related fluorescence mechanisms are verified clearly. © 2015 American Chemical Society.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;cited By 78&lt;/p&gt;
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