Generalized Synthesis of Hybrid Metal鈥揝emiconductor Nanostructures Tunable from the Visible to the Infrared
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- 作者：Bishnu P. Khanal ; Anshu Pandey ; Liang Li ; Qianglu Lin ; Wan Ki Bae ; Hongmei Luo ; Victor I. Klimov ; Jeffrey M. Pietryga
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：May 22, 2012
- 年：2012
- 卷：6
- 期：5
- 页码：3832-3840
- 全文大小：521K
- 年卷期：v.6,no.5(May 22, 2012)
- ISSN：1936-086X
文摘
Hybrid superstructures allow a convenient route to the development of materials with multiple functionalities (e.g., sensor, marker, conductor) out of monofunctional (e.g., excitonic, plasmonic) building blocks. This work describes a general synthetic route to the preparation of metal|dielectric|quantum dot hybrid superstructures that have excitonic and plasmonic resonances independently tunable from the ultraviolet to the mid-infrared spectral region. We demonstrate that structural tuning can be used to control intercomponent coupling leading to the emergence of unique optical properties. We illustrate this capability by demonstrating single- and multicolor emission from coupled systems, and a significant enhancement of two-photon absorption cross sections of quantum dots. Such properties in a robust yet dispersible particle can be useful in a number of applications including bioimaging and microscopy, and in optoelectronic devices, as well as serve as a platform for fundamental studies of metal鈥搒emiconductor interactions.