Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/70260
標題: Formation Mechanism, Patterning, and Physical Properties of Gold-Nanoparticle Films Assembled by an Interaction-Controlled Centrifugal Method
作者: Ni, I.C.
Yang, S.C.
Jiang, C.W.
Luo, C.S.
Kuo, W.
Lin, K.J.
Tzeng, S.D.
關鍵字: vapor-sensing properties
thin-films
nanocrystal superlattices
electronic-properties
metal nanoparticles
optical-properties
plasmon
resonance
monolayers
deposition
surface
期刊/報告no:: Journal of Physical Chemistry C, Volume 116, Issue 14, Page(s) 8095-8101.
摘要: Gold nanoparticle (AuNP) films Stacked with individual AuNPs have been shown to exhibit novel electric, plasmonic, and photoelectric properties for wide applications. Here, we developed an efficient centrifugal method to assemble desirable large area monolayer, multilayer, and three-dimensional (3D) patterned AuNP films. The formation mechanism of AuNP films under different colloidal interactions was studied. The optimal energy barrier is about 10 k(B)T for assembling high quality monolayer AuNP films. The shift of localized surface plasmon resonance bands of the films follows a near-exponential distance decay with interparticle spacing s. A red-shift of about 190 nm reveals the strong near-field coupling at s similar to 0.9 nm. The electrical resistance exponentially increases with s, and exhibits Coulomb charging behavior at low temperature. Furthermore, patterning of AuNP films based on the lift-off technique was achieved and yielded 2D/3D complex structures with submicrometer critical dimension. This assembly method provides a feasible approach in developing future nanodevices and functional nanostructures.
URI: http://hdl.handle.net/11455/70260
ISSN: 1932-7447
文章連結: http://dx.doi.org/10.1021/jp211126v
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