2009
DOI: 10.1016/j.mee.2009.05.004
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Development of large area nano imprint technology by step and repeat process and pattern stitching technique

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Cited by 19 publications
(19 citation statements)
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“…However, the reduction in force holding time is an inherent disadvantage (i.e., causing polymer reflows), which can result in a reduction in embossed pattern quality (He et al, 2007; Ahn & Guo, 2008; Cho et al, 2009). This potential disadvantage can be partially compensated by optimizing the embossing parameters.…”
Section: Introductionmentioning
confidence: 99%
“…However, the reduction in force holding time is an inherent disadvantage (i.e., causing polymer reflows), which can result in a reduction in embossed pattern quality (He et al, 2007; Ahn & Guo, 2008; Cho et al, 2009). This potential disadvantage can be partially compensated by optimizing the embossing parameters.…”
Section: Introductionmentioning
confidence: 99%
“…For the proof-of-concept, we designed a hexagonal microwall without a structure gradient (hexawall) and an inverted pyramidal microwall with a structure gradient (ipyrawall), considering the structural requirements described in Figure B. Our interconnected hexawall (α = 90°) and ipyrawall (α = ∼125°) were fabricated through the UV-NIL process (Figure A,B and see the “Materials and Methods” section), , which are highly compatible with the roll-to-roll (R2R) printing for scalable manufacturing of functional surfaces (Figure C). Additionally, the transparency of our microcavity surfaces as shown in Figure D, is compatible with optical sensing technologies (e.g., surface-enhanced Raman spectroscopy-based biosensor) and other in practical applications (e.g., touch screens) …”
Section: Results and Discussionmentioning
confidence: 99%
“…Here, we proposed a robust particle capture surface that allows the directional particle aggregation of microdroplets by controlling the 3D geometry and surface chemistry of the substrate for low contact transfer from the fomites contaminated by respiratory droplets. Although we focused on the low efficacy of transfer from the contaminated microstructured surfaces to other clean surfaces in this study, we expect that the microcavity surfaces will help limit the contact transfer of various pathogens from contaminated objects (i.e., hands) to recipient surfaces due to their small contact area (∼0.21 for hexawall and ∼0.015–0.03 for ipyrawall). , The efficient particle capturing ability of the microcavity structures not only prevents fomite-based transmission but also may be utilized to preconcentrate target analytes, which may be useful for the environmental monitoring or Raman spectroscopy of pathogens, including SARS-CoV-2. In addition to the mechanical and chemical stability of surfaces observed after spray cleaning (Figure S10) and the ability to capture particles even without cleaning (Figures S11–13), our engineered surfaces are highly compatible with large-scale manufacturing techniques. ,, For example, we have applied a R2R imprinting process to achieve scalable high-throughput fabrication of interconnected microcavity surfaces (Figure C). With cost-effective large-scale fabrication, our microstructured surfaces will find a wider range of applications in various fields.…”
Section: Discussionmentioning
confidence: 99%
“…2 High temperature plate type embossing has technical difficulties in temperature uniformity across the work surface, with a difficulty of maintaining the temperature and pressure, so the maximum wafer-level work area is limited to below around 400 mm. 3 Widening the hot embossing equipment is the main issue in the field of hot embossing technology. From the above trends and problems, the roll-to-roll (R2R) hot embossing system has been proposed recently.…”
Section: Introductionmentioning
confidence: 99%