Fabrication of sub-5 nm nanochannels in insulating substrates using focused ion beam milling.

Fabrication of sub-5 nm nanochannels in insulating substrates using focused ion beam milling.
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DOI:
10.1021/nl103369g
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发表时间:
2011-02-09
期刊:
影响因子:
10.8
通讯作者:
Ramsey JM
Ramsey JM
中科院分区:
材料科学1区
文献类型:
--
作者:
Menard LD;Ramsey JM

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描述了使用聚焦离子束(FIB)铣削来制造具有延伸到5nm以下的临界尺寸的纳米通道。FIB铣削线随着它们被铣削到衬底中更深处而具有变窄的宽度。这种聚焦特性与由沉积在衬底上的相对厚(>100 nm)的金属膜组成的双层结构相结合。通过金属层铣削通道,直到其穿透到基底材料中的规定深度。然后去除金属,留下具有光滑表面和小至5 nm的横向尺寸的纳米通道。这些开放的纳米通道可以用盖板密封,所得的装置非常适合单分子DNA转运研究。这种方法用于石英,单晶硅,和聚二甲基硅氧烷基板,以证明其通用性。
The use of focused ion beam (FIB) milling to fabricate nanochannels with critical dimensions extending below 5 nm is described. FIB milled lines have narrowing widths as they are milled deeper into a substrate. This focusing characteristic is coupled with a two-layered architecture consisting of a relatively thick (>100 nm) metal film deposited onto a substrate. A channel is milled through the metal layer until it penetrates a prescribed depth into the substrate material. The metal is then removed, leaving a nanochannel with smooth surfaces and lateral dimensions as small as sub-5 nm. These open nanochannels can be sealed with a cover plate and the resulting devices are well-suited for single-molecule DNA transport studies. This methodology is used with quartz, single-crystal silicon, and polydimethylsiloxane substrates to demonstrate its general utility.
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