Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/139073
Title: EXCITATION AND RELAXATION MECHANISM OF GOLD NANORODS STUDIED BY POLARIZATION RESOLVED ULTRAFAST LASER SPECTROSCOPY
Authors: ZHU HAI
ORCID iD:   orcid.org/0000-0003-3015-7183
Keywords: Ultrafast spectroscopy, Surface plasmon resonance, Gold Nanorods, Two-photon excitation, Charge transfer, Photoluminescence
Issue Date: 31-Jul-2017
Citation: ZHU HAI (2017-07-31). EXCITATION AND RELAXATION MECHANISM OF GOLD NANORODS STUDIED BY POLARIZATION RESOLVED ULTRAFAST LASER SPECTROSCOPY. ScholarBank@NUS Repository.
Abstract: Noble metal nanoparticles display localized surface plasmon resonance (SPR), originating from the collective oscillation of conduction band electrons. Gold nanorods (Au NRs) possess two orthogonal SPR modes, leading to interesting anisotropic optical properties and strong two photon absorption at near infrared. However, the excitation and relaxation mechanism of gold nanorods associated with SPR are unclear and under debate. In this thesis, we performed polarization resolved ultrafast spectroscopic measurements such as transient absorption spectroscopy, two-pulse emission modulation spectroscopy to investigate the two photon excitation (2PE) and one photon excitation (1PE) process as well as the subsequent relaxation process in Au NRs. We also demonstrate an extremely fast solvent to Au NRs electron transfer process, significantly interrupting the two photon excitation efficiency. Then 2PE and 1PE emission nature of Au NRs was unraveled by emission anisotropy study. This thesis understands physical underpinnings of Au NRs by ultrafast spectroscopy.
URI: http://scholarbank.nus.edu.sg/handle/10635/139073
Appears in Collections:Ph.D Theses (Restricted)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
ZhuHai.pdf3.91 MBAdobe PDF

RESTRICTED

NoneLog In

Page view(s)

27
checked on Sep 13, 2018

Download(s)

4
checked on Sep 13, 2018

Google ScholarTM

Check


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