Observation of Assembly of Fluorescent Si Nanoparticles Under the Influence of Electric Current
Abstract:A silicon substrate patterned by an oxide is immersed in an alcohol solution of low-doped 1-nm Si nanoparticles. Reverse biasing draws particles to the substrate, mostly along the conducting current paths. Scanning electron and fluorescence microscopy show a tree-like network on the substrate. Avoidance of closed loops and preference for an angle of branching of 90°–120° are observed. The building block of the tree network is not individual particles but spherical particle aggregates ~150 nm in diameter.
Document Type: Communications
Affiliations: 1: Department of Physics, KSU, Riyadh, Saudi Arabia. 2: Department of Physics and Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
Publication date: 2002-10-01
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