Two-dimensional nanoarchitectonics based on self-assembly
Two-dimensional nanoarchitectonics based on self-assembly
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DOI：
10.1016/j.cis.2010.01.005
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发表时间：
2010-02-26
影响因子：
15.6
通讯作者：
Hill, Jonathan P.
中科院分区：
文献类型：
--
作者：
Ariga, Katsuhiko;Lee, Michael V.;Hill, Jonathan P.
自上而下的纳米加工技术，特别是光刻技术，已经将纳米技术推进到了一个点，现在需要将系统工艺与自下而上的自组装集成。由于大多数光刻技术被限制在二维平面，集成自组装系统的调查应集中在二维组织。本文根据界面类型对二维纳米构造的研究进行了分类和总结。在超高真空下使用扫描探针显微镜可以以高结构精度分析蒸发分子沉积到固体表面上之后的图案形成。讨论了吸附相的转变和吸附分子构象变化对图案失配的调节，以及约束图案形成的力，即，二维氢键网络、货车范德华力和分子-表面相互作用。在液-固界面上的分子沉积拓宽了可以研究的分子范围。在这项工作中讨论的更复杂的分子是C-60-富勒烯衍生物和设计师DNA链。气-液界面，例如空气和水之间的界面，允许动态形成，其可以适应分子构象变化。在这种情况下，任何产生的图案都可以通过宏观地改变条件来调制。在流体空气-水界面处使用柔性分子还允许通过宏观机械运动来动态操作分子机器，从而实现手动操作的纳米技术。(C)2010爱思唯尔有限公司版权所有。
Top-down nanofabrication techniques, especially photolithography, have advanced nanotechnology to a point where system-process integration with bottom-up self-assembly is now required. Because most lithographic techniques are constrained to two-dimensional planes, investigation of integrated self-assembly systems should focus on two-dimensional organization. In this review, research on two-dimensional nanoartchitectonics is classified and summarized according to the type of interface used. Pattern formation following deposition of vaporized molecules onto a solid surface can be analyzed with high structural precision using scanning probe microscopy under ultra high vacuum. Transitions of adsorbed phases and adjustment of pattern mismatch by conformational changes of adsorbed molecules are discussed, in addition to the forces constraining pattern formation, i.e., two-dimensional hydrogen bond networks, van der Waals forces, and molecule-surface interactions. Molecular deposition at a liquid-solid interface broadens the range of molecules that can be investigated. The more complex molecules discussed in this work are C-60-fullerene derivatives and designer DNA strands. Gas-liquid interfaces, e.g. between air and water, allow dynamic formations that can adjust to molecular conformational changes. In this case, any resulting patterns can be modulated by varying conditions macroscopically. Using flexible molecules at the fluid air-water interface also permits dynamic operation of molecular machines by macroscopic mechanical motion, thus enabling, hand-operated nanotechnology. (C) 2010 Elsevier B.V. All rights reserved.