Hexagonally Close Packed Langmuir-Blodgett Films from Monodispersed Silica Nanoparticles

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Abstract:

This report demonstrates a novel procedure to produce hexagonally close packed nanoparticle film using the Langmuir-Blodgett (LB) technique. The LB technique has advantages over previously reported techniques, such as high reproducibility, formation of large area films with low-cost capable of producing a large number of hexagonally close packed nanoparticle films at a single process. In this method, a monolayer of mono-dispersed silica nanoparticles was spread on the surface of water and then transferred it onto a gold sputtered glass substrate or silicon wafer. The silica particles used for fabrication of LB films were synthesized by the modified Stöber method. In present work, we synthesized 300±5 nm sized silica particles. A large area of hexagonally close packed nanoparticle films fabricated by the LB technique was confirmed by AFM and FE-SEM. Furthermore, we demonstrate fabrication of over 34 hexagonally close packed nanoparticle LB films on glass substrates with area of 18 × 18 mm2 from a single process.
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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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