Thermal and radiation process for nano-/micro-fabrication of crosslinked PTFE

Kobayashi, Akinobu; Oshima, Akira; Okubo, Susumu; Tsubokura, Hidehiro; Takahashi, Tomohiro; Oyama, Tomoko Gowa; Tagawa, Seiichi; Washio, Masakazu

doi:10.1016/j.nimb.2012.11.002

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…However, micro- and nanopatterning of Teflon AF poses a considerable challenge. Currently available techniques for micropatterning of Teflon AF are mostly based on focused ion beam etching, synchrotron radiation, and laser light exposure, which are limited to micrometer resolution. − Common photolithography has also been reported as an alternative, allowing for micropatterning of Teflon AF surfaces with the smallest feature size of ∼1 μm …”

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confidence: 99%

Nanopatterning of Mobile Lipid Monolayers on Electron-Beam-Sculpted Teflon AF Surfaces

Shaali¹,

Lara‐Avila²,

Dommersnes

et al. 2015

ACS Nano

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Direct electron-beam lithography is used to fabricate nanostructured Teflon AF surfaces, which are utilized to pattern surface-supported monolayer phospholipid films with 50 nm lateral feature size. In comparison with unexposed Teflon AF coatings, e-beam-irradiated areas show reduced surface tension and surface potential. For phospholipid monolayer spreading experiments, these areas can be designed to function as barriers that enclose unexposed areas of nanometer dimensions and confine the lipid film within. We show that the effectiveness of the barrier is defined by pattern geometry and radiation dose. This surface preparation technique represents an efficient, yet simple, nanopatterning strategy supporting studies of lipid monolayer behavior in ultraconfined spaces. The generated structures are useful for imaging studies of biomimetic membranes and other specialized surface applications requiring spatially controlled formation of self-assembled, molecularly thin films on optically transparent patterned polymer surfaces with very low autofluorescence.

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confidence: 99%

Nanopatterning of Mobile Lipid Monolayers on Electron-Beam-Sculpted Teflon AF Surfaces

Shaali¹,

Lara‐Avila²,

Dommersnes

et al. 2015

ACS Nano

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“…In this study, electron beam-nanoimprint lithography (EB-NIL), which enables cross-linking and device fabrication at the same time, 8,9) was proposed as a novel method for fabricating micro-/nanostructures of RX-PLLA. The fabrication accuracy was evaluated by estimating the line edge roughness (LER), and the thermal resistance of these structures was evaluated by measuring the deformation after heating in order to apply bio-MEMS/NEMS.…”

mentioning

confidence: 99%

Micro-/Nanofabrication of Cross-linked Poly(L-lactic acid) Using Electron Beam Nanoimprint Lithography

Okubo

Nagasawa

Kobayashi

et al. 2012

Appl. Phys. Express

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Electron beam nanoimprint lithography was proposed for fabricating the micro-/nanostructures of cross-linked poly(L-lactic acid) (RX-PLLA). PLLA with triallyl isocyanurate (TAIC) solutions were dropped on the Si-molds fabricated by the conventional EB lithography technique. PLLA/TAIC on Si-molds were imprinted and cross-linked with doses from 10 to 500 kGy at room temperature under vacuum. The micro-/nanostructures of RX-PLLA were successfully obtained with high accuracy. Hence, it was found that the imprinted structures of RX-PLLA (100 kGy irradiation) show low line edge roughness and high thermal durability at 120 °C.

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“…Furthermore, heat-shrinkable Quantum Beam Sci. 2020, 4, 14 2 of 13 tube, foamed polyethylene [7,8], high-purity ceramic fiber [9], fluorine polymer materials [10,11], and others [12][13][14] have been developed for practical use.…”

Section: Introductionmentioning

confidence: 99%

Development of Advanced Biodevices Using Quantum Beam Microfabrication Technology

Oyama

Kimura

Nagasawa

et al. 2020

QuBS

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Biodevices with engineered micro- and nanostructures are strongly needed for advancements in medical technology such as regenerative medicine, drug discovery, diagnostic reagents, and drug delivery to secure high quality of life. The authors produced functional biocompatible plastics and hydrogels with physical and chemical properties and surface microscopic shapes that can be freely controlled in three dimensions during the production process using the superior properties of quantum beams. Nanostructures on a biocompatible poly(L-lactic acid) surface were fabricated using a focused ion beam. Soft hydrogels based on polysaccharides were micro-fabricated using a focused proton beam. Gelatin hydrogels were fabricated using γ-rays and electron beam, and their microstructures and stiffnesses were controlled for biological applications. HeLa cells proliferated three-dimensionally on the radiation-crosslinked gelatin hydrogels and, furthermore, their shapes can be controlled by the micro-fabricated surface of the hydrogel. Long-lasting hydrophilic concave structures were fabricated on the surface of silicone by radiation-induced crosslinking and oxidation. The demonstrated advanced biodevices have potential applications in three-dimensional cell culture, gene expression control, stem cell differentiation induction/suppression, cell aggregation into arbitrary shapes, tissue culture, and individual diagnosis in the medical field.

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Thermal and radiation process for nano-/micro-fabrication of crosslinked PTFE

Cited by 5 publications

References 25 publications

Nanopatterning of Mobile Lipid Monolayers on Electron-Beam-Sculpted Teflon AF Surfaces

Nanopatterning of Mobile Lipid Monolayers on Electron-Beam-Sculpted Teflon AF Surfaces

Micro-/Nanofabrication of Cross-linked Poly(L-lactic acid) Using Electron Beam Nanoimprint Lithography

Development of Advanced Biodevices Using Quantum Beam Microfabrication Technology

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