Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/118670
Title: ULTRAFAST DYNAMICS AND NONLINEAR OPTICAL PROPERTIES OF GRAPHENE OXIDES AND NOBLE METAL NANOPARTICLES
Authors: JIANG XIAOFANG
Keywords: Ultrafast dynamics, nonlinear absorption, two-photon photoluminescence, graphene oxides, noble metal nanoparticles, femtosecond laser spectroscopy
Issue Date: 19-Aug-2014
Citation: JIANG XIAOFANG (2014-08-19). ULTRAFAST DYNAMICS AND NONLINEAR OPTICAL PROPERTIES OF GRAPHENE OXIDES AND NOBLE METAL NANOPARTICLES. ScholarBank@NUS Repository.
Abstract: BY EMPLOYING SEVERAL ULTRAFAST LASER SPECTROSCOPIC TECHNIQUES, SOME INTRIGUING OPTICAL PROPERTIES OF GRAPHENE OXIDES (GO) AND GOLD NANOPARTICLES (AU NPS) HAVE BEEN EXPLORED IN THIS THESIS, INCLUDING NONLINEAR OPTICAL PROPERTIES SUCH AS NONLINEAR ABSORPTION, TWO-PHOTON PHOTOLUMINESCENCE (TPPL) AS WELL AS THE ELECTRONIC RELAXATION DYNAMICS. GOLD NANORODS (AU NRS) AND COUPLED AU NPS ARE KNOWN TO DISPLAY STRONG TPPL. TO FIGURE OUT THE UNDERLYING MECHANISMS, WE DEVELOPED AND PREFORMED TWO-PULSE EMISSION MODULATION AND PUMP-PROBE MEASUREMENTS TO INVESTIGATE THEIR EXCITATION DYNAMICS. OUR RESULTS CLARIFIED THE TPPL EXCITATION NATURE OF AU NPS AND ITS ASSOCIATED QUENCHING MECHANISMS OF AU NRS IN DIFFERENT ORGANIC SOLVENTS COMPARED TO WATER. GO NANOSTRUCTURES WERE ALSO SYSTEMATICALLY STUDIED BY UTILIZING THE TRANSIENT ABSORPTION SPECTROSCOPY AND Z-SCAN TECHNIQUES. THE OBSERVED ULTRAFAST CARRIER RELAXATION DYNAMICS OF GO AND REDUCED GO SHOWED TOTALLY DIFFERENT BEHAVIORS, WHICH INSPIRED US TO INV
URI: http://scholarbank.nus.edu.sg/handle/10635/118670
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
JiangXF.pdf3.93 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

127
checked on Nov 2, 2018

Download(s)

53
checked on Nov 2, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.