Title: Interfacial Polar-Bonding-Induced Multifunctionality of Nano-Silicon in Mesoporous Silica
Authors: Huang, Jung Y.
Shieh, Jia M.
Kuo, Hao C.
Pan, Ci L.
光電工程學系
Department of Photonics
Issue Date: 10-Jul-2009
Abstract: The optoelectronic response of a material governs its suitability for a wide range of applications, from photon detection to photovoltaic conversion. To conquer the material limitations and achieve improved optoelectronic responses, nanotechnology has been employed to arranges subunits with specific size-dependent quantum mechanical properties in a hierarchically organized structure. However, building a functional optoelectronic system from nano-objects remains a formidable challenge. In this paper, the fabrication of a new artificially engineered optoelectronic material by the preferential growth of silicon nanocrystals on the bottom of the pore-channels of mesoporous silica is reported. The nanocrystals form highly stable interface structures bonded on one side; these structure show strong electron-phonon coupling and a ferroelectric-like hysteretic switching property. A new class of multifunctional materials is realized by invoking a concept that employs semiconductor nanocrystals for optical sensing and utilizes interfacial polar layers to facilitate carrier transport and emulate ferroelectric-like switching.
URI: http://dx.doi.org/10.1002/adfm.200801336
http://hdl.handle.net/11536/6969
ISSN: 1616-301X
DOI: 10.1002/adfm.200801336
Journal: ADVANCED FUNCTIONAL MATERIALS
Volume: 19
Issue: 13
Begin Page: 2089
End Page: 2094
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