Microchannel refill: a new method for fabricating 2D nanochannels in polymer substrates

In this paper, we present a new approach that is capable of fabricating nanochannels in a poly(methyl methacrylate) (PMMA) substrate. This method, which we call microchannel refill (MR), utilizes the refilling of glassy thermoplastics under thermal compression to reduce a microscopic channel to a na...

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Bibliographic Details
Published in:Lab on a chip 2012-10, Vol.12 (20), p.4059-4062
Main Authors: Li, Jing-min, Liu, Chong, Ke, Xue, Xu, Zheng, Duan, Ya-jie, Fan, Yan, Li, Meng, Zhang, Kai-ping, Wang, Li-ding
Format: Article
Language:English
Subjects:
Channels
Compressed
Compressing
Microchannels
Nanostructure
Polymethyl methacrylates
Refilling
Two dimensional
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Summary:In this paper, we present a new approach that is capable of fabricating nanochannels in a poly(methyl methacrylate) (PMMA) substrate. This method, which we call microchannel refill (MR), utilizes the refilling of glassy thermoplastics under thermal compression to reduce a microscopic channel to a nanochannel. It only has two main steps. First, a microchannel is fabricated in a PMMA substrate using normal hot embossing. Second, the microchannel is compressed under a certain temperature and pressure to obtain a nanochannel. We show that a nanochannel with a width as small as 132 nm (with a depth of 85 nm) can be easily produced by choosing the appropriate compression temperature, compression pressure, original microchannel width and original microchannel aspect ratio. Compared with most current nanochannel fabrication methods, MR is a quick, simple and cost-effective way to produce nanochannels in polymer substrates.
ISSN:1473-0197
1473-0189
DOI:10.1039/c2lc40078b