Abstract
We report solvent dependent spectroscopic study of unique non-functionalized fluorescent carbon nanoparticles (NCNPs) dispersed in 15 organic solvents: aromatic (three), hydrogen bonded (five) and aprotic (seven). Absorption spectra were found to be independent of the solvent nature, with absorption bands located around 430, 405 and 385nm whereas photoluminescence (PL) spectra exhibited considerable solvent dependence with PL emission peaks lying in the region 405 to 500nm. Emission life time measured by time resolved fluorescence spectroscopy revealed that in aromatic solvents the average lifetime (τav), did not change significantly with solvent polarity, which was, typically 4–5ns under the excitation of 405nm. In hydrogen bonded solvents, τav was observed to decrease with solvent polarity, but in case of aprotic solvents, τav was observed to increase with solvent polarity for a particular excitation. Emission data in hand revealed possible quantum confinement of these nanoparticles inside the cavity of rings of THF, p-xylene, benzene and toluene molecules.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
