Shell thickness matters! Energy transfer and rectification study of Au/ZnO core/shell nanoparticles

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dc.contributor.authorHaldar, Krishna Kanta
dc.contributor.authorSen, Tapasi
dc.date.accessioned2018-02-01T10:10:37Z
dc.date.accessioned2024-08-13T11:16:41Z
dc.date.available2018-02-01T10:10:37Z
dc.date.available2024-08-13T11:16:41Z
dc.date.issued2016
dc.description.abstractIn the present study we report the influence of shell thickness on fluorescence resonance energy transfer between Au/ZnO core-shell nanoparticles and Rhodamine 6G dye by steady-state and time-resolved spectroscopy and rectification behaviours. Au/ZnO core-shell nanoparticles with different shell thickness were synthesized in aqueous solution by chemically depositing zinc oxide on gold nanoparticles surface. A pronounced effect on the photoluminescence (PL) intensity and shortening of the decay time of the dye in presence of Au/ZnO core-shell nanoparticles is observed. The calculated energy transfer efficiencies from dye to Au/ZnO are 62.5%, 79.2%, 53.6% and 46.7% for 1.5 nm, 3 nm, 5 nm and 8 nm thickness of shell, respectively. Using FRET process, the calculated distances (r) are 117.8, 113.2 ? 129.9 ? and 136.7 ? for 1.5 nm, 3 nm, 5 nm and 8 nm thick Au/ZnO core-shell nanoparticles, respectively. The distances (d) between the donor and acceptor are 71.0, 57.8, 76.2 and 81.6 ? for 1.5 nm, 3 nm, 5 nm and 8 nm thick core-shell Au/ZnO nanoparticles, respectively, using the efficiency of surface energy transfer (SET). The current-voltage (I-V) curve of hybrid Au/ZnO clearly exhibits a rectifying nature and represents the n-type Schottky diode characteristics with a typical turn-on voltage of between 0.6 and 1.3 V. It was found that the rectifying ratio increases from 20 to 90 with decreasing the thickness of the shell from 5 nm to 3 nm and with shell thickness of 8 nm, electrical transport through the core-shell is similar to what is observed with pure ZnO samples nanoparticles. The results indicated that the Au/ZnO core-shell nanoparticles with an average shell thickness of 3 nm exhibited the maximum energy transfer efficiencies (79.2%) and rectification (rectifying ratio 90). ? 2016en_US
dc.identifier.citationHaldar, K. K., & Sen, T. (2016). Shell thickness matters! Energy transfer and rectification study of Au/ZnO core/shell nanoparticles. Journal of Colloid and Interface Science, 484, 263-269. doi: 10.1016/j.jcis.2016.09.006en_US
dc.identifier.doi10.1016/j.jcis.2016.09.006
dc.identifier.issn219797
dc.identifier.urihttp://10.2.3.109/handle/32116/563
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0021979716306610?via%3Dihub
dc.language.isoen_USen_US
dc.publisherAcademic Press Inc.en_US
dc.subjectDyeingen_US
dc.subjectEnergy transferen_US
dc.subjectFluorescenceen_US
dc.subjectGolden_US
dc.subjectLaser spectroscopyen_US
dc.subjectNanoparticlesen_US
dc.subjectSchottky barrier diodesen_US
dc.subjectSolutionsen_US
dc.subjectSpectroscopyen_US
dc.subjectSynthesis (chemical)en_US
dc.subjectZinc oxideen_US
dc.subjectCore-shell nanoparticlesen_US
dc.subjectEnergy transfer efficiencyen_US
dc.subjectFluorescence resonance energy transferen_US
dc.subjectFRETen_US
dc.subjectPhotoluminescence intensitiesen_US
dc.subjectRectificationen_US
dc.subjectShell nanoparticlesen_US
dc.subjectTime-resolved spectroscopyen_US
dc.subjectShells (structures)en_US
dc.subjectgold nanoparticleen_US
dc.subjectnanoshellen_US
dc.subjectrhodamine 6Gen_US
dc.subjectzinc oxide nanoparticleen_US
dc.subjectaqueous solution diodeen_US
dc.subjectelectric potentiaen_US
dc.titleShell thickness matters! Energy transfer and rectification study of Au/ZnO core/shell nanoparticlesen_US
dc.title.journalJournal of Colloid and Interface Science
dc.typeArticleen_US

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