tailieunhanh - Báo cáo hóa học: " Translation and manipulation of silicon nanomembranes using holographic optical tweezersc"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Translation and manipulation of silicon nanomembranes using holographic optical tweezers | Oehrlein et al. Nanoscale Research Letters 2011 6 507 http content 6 1 507 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Translation and manipulation of silicon nanomembranes using holographic optical tweezers Stefan M Oehrlein Jose R Sanchez-Perez RB Jacobson Frank S Flack Ryan J Kershner and Max G Lagally Abstract We demonstrate the use of holographic optical tweezers for trapping and manipulating silicon nanomembranes. These macroscopic free-standing sheets of single-crystalline silicon are attractive for use in next-generation flexible electronics. We achieve three-dimensional control by attaching a functionalized silica bead to the silicon surface enabling non-contact trapping and manipulation of planar structures with high aspect ratios high lateral size to thickness . Using as few as one trap and trapping powers as low as several hundred milliwatts silicon nanomembranes can be rotated and translated in a solution over large distances. Keywords optical trapping silicon nanomembrane nanofabrication directed assembly Introduction Silicon nanomembranes are flexible single-crystalline sheets with thicknesses ranging from less than ten up to several hundred nanometers 1 2 . These materials are extremely attractive for use in fast-flexible-electronic optoelectronic and nanophotonic applications. This broad potential derives from the unique properties imparted by the membranes thinness relative to silicon wafers including robustness flexibility and bondability. The structures can also be strain engineered to enhance individual electronic and mechanical properties or to produce unique tubular and helical nanostructures 2-6 . Successful integration of these structures into next-generation devices will require new paradigms for their assembly. The most promising methods for transferring and manipulating silicon nanomembranes to date include wet transfer whereby nanomembranes are moved from the original substrate .

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