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Issue 5, 2009
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Nanofabrication in cellulose acetate

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We have demonstrated nanofabrication with commercialized cellulose acetate. Cellulose acetate is used for bulk nanofabrication and surface nanofabrication. In bulk nanofabrication, cellulose acetate reacts with an e-beam and permanent patterns are formed in it instead of being transferred to other substrates. We have studied the nano relief modulation performance of cellulose acetate before and after development. The depth of the nanopatterns is magnified after development, and is varied by exposing dosage and line width of the pattern. The thinnest 65 nm wide line is achieved in the bulk fabrication. We also demonstrate a binary phase Fresnel lens array which is directly patterned in a cellulose acetate sheet. Because of its unique mechanical and optical properties, cellulose is a good candidate for a template material for soft imprinting lithography. In the surface nanofabrication, cellulose acetate thin film spin-coated on silicon wafers is employed as a new resist for e-beam lithography. We achieved 50 nm lines with 100 nm pitches, dots 50 nm in diameter, and single lines with the smallest width of 20 nm. As a new resist of e-beam lithography, cellulose acetate has high resolution comparable with conventional resists, while having several advantages such as low cost, long stock time and less harmfulness to human health.

Graphical abstract: Nanofabrication in cellulose acetate

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Publication details

The article was received on 16 Jul 2008, accepted on 03 Nov 2008 and first published on 26 Nov 2008

Article type: Paper
DOI: 10.1039/B812141A
Citation: Lab Chip, 2009,9, 699-703
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    Nanofabrication in cellulose acetate

    H. Zeng, R. Lajos, V. Metlushko, E. Elzy, S. Y. An and J. Sautner, Lab Chip, 2009, 9, 699
    DOI: 10.1039/B812141A

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