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Observation of Assembly of Fluorescent Si Nanoparticles Under the Influence of Electric Current

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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.

Keywords: Electric Current; Fluorescent Silicon Nanoparticles; Spectroscopy.

Document Type: Communications

DOI: http://dx.doi.org/10.1166/jnn.2002.136

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: October 1, 2002

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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