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Investigation of the Thermal Stability of 2-D Patterns of Au Nanoparticles

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Nanoparticles can serve as useful components or sub-assemblies, i.e., building blocks, in the design and fabrication of more complex structures needed for rapid prototyping using layered nanofabrication (LNF) or for use in nanoelectromechanical systems (NEMS). This paper describes investigations of the thermal stability of simple 2-D patterns of thiol-coated, 5-nm gold nanoparticles deposited on the native oxide surface of a Si(100) single crystal substrate. The changes in the particle structure and location on the surface were probed by using atomic force microscopy (AFM) before and after heating in ambient air. Experiments were carried out on the as-deposited nanoparticles and on patterns of nanoparticles that had been pretreated (prior to heating) by a 10-min exposure in a UV-ozone ashing chamber. All individual particles and 2-D patterns were stable up to 550 °C. Higher temperatures caused first a reduction in particle height and eventually a loss of the particle from the field of view (presumably by rather long-range diffusion).
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Document Type: Research Article

Publication date: 2007-08-01

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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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