Effect of Morphology on Ultrafast Carrier Dynamics in Asymmetric Gold鈥揑ron Oxide Plasmonic Heterodimers

详细信息    查看全文

• 作者：Kseniya Korobchevskaya ; Chandramohan George ; Liberato Manna ; Alberto Comin
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：December 27, 2012
• 年：2012
• 卷：116
• 期：51
• 页码：26924-26928
• 全文大小：377K
• 年卷期：v.116,no.51(December 27, 2012)
• ISSN：1932-7455

文摘

Understanding how nanoscale interfaces affect electrical and optical properties of multifunctional nanocrystal heterostructures is of paramount importance for their technological application. In this context, we investigated the ultrafast carrier dynamics of rodlike gold鈥搃ron oxide nanocrystal heterodimers, in a spectral region close to the surface plasmon resonance frequency, by means of broad-band transient absorption spectroscopy. We found that the electron鈥損honon relaxation time is independent of the morphology of the iron oxide domain. Moreover, we revealed a transient shift in the surface plasmon resonance frequency, which can be related to charge transfer at the interface between gold and iron oxide.