Self-Assembly of Large-Scale Micropatterns on Aligned Carbon Nanotube FilmsThe fabrication of well-defined structures with nanoscalematerials is a key technology,[1] and self-assembly is anefficient and often preferred process to build micro- andnanoparticles into ordered macroscopic structures.[2] Ascarbon nanotubes are attractive materials for nanotechnologybecause of their interesting physicochemical properties andmolecular symmetries,[3–6] it is necessary to control thearchitecture of carbon nanotubes on the substrates. Mostpatterned carbon nanotubes are formed on prepatternedsubstrates or prepatterned catalysts during the fabricationprocess.[7–9] Herein we report the first use of a long-rangeforce (capillary force) in the self-assembly of three-dimensional(3D) micropatterns on aligned carbon nanotube filmsthrough a water-spreading method after the growth of thecarbon nanotube. It is considered that low-density regions orvacancies of carbon nanotube films play an important role inthe formation of the pattern. Therefore different kinds ofhighly ordered micropatterned structures have been built in acontrolled fashion by introducing vacancies artificially.(请下载全文欣赏)
中科院物理所纳米实验室 N10 组提出了一种非接触式应变直写技术。该技术可以在二维材料中准确写入纳米到微米尺度设计图案的应变。这项全新应变技术,具备高度的灵活性以及半导体工艺兼容性,有望进一步推进二维材料在纳米机电系统、高性能传感和非传统光伏到量子信息科学等广泛领域的潜在应用。相关成果 "Strain lithography for two-dimensional materials by electron irradiation."已在Applied Physics Letters 上发表。