UV nano embossing for polymer nano structures with non-transparent mold insert

Lee, Hyun Sup; Kim, Dong Sung; Kwon, Tai Hun

doi:10.1007/s00542-006-0172-5

Cited by 20 publications

(8 citation statements)

References 9 publications

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“…From the parametric study for the processing conditions in the UV nano embossing process, the appropriate processing condition for the replication of the nanopillar array was found to be curing time of 12 min and applied embossing pressure of 0.2 MPa at room temperature in this particular case (Lee et al 2005b). Figure 4 shows successfully replicated high-aspect-ratio nanopillar arrays on a polymer film from the AAO mold III as a gecko foot-hair prototype.…”

Section: Replication Of Nanopillar Arraysmentioning

confidence: 98%

Replication of high-aspect-ratio nanopillar array for biomimetic gecko foot-hair prototype by UV nano embossing with anodic aluminum oxide mold

Kim

Lee

et al. 2006

Microsyst Technol

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In this paper, we present a simple and costeffective replication method of high-aspect-ratio polymer nanopillar array as a biomimetic gecko's foot hair prototype. A UV nano embossing process was applied for the replication of polymer nanopillar arrays. Highly ordered straight nanoporous AAO (anodic aluminum oxide) templates were utilized as reusable master molds. Densely arranged high-aspect-ratio nanopillar arrays have been successfully fabricated by means of the UV nano embossing process with the AAO mold. Pull-off force measurements were carried out to characterize the adhesive force of the replicated nanopillar arrays on the polymer substrates based on the force-distance curves obtained from the atomic force microscope (AFM) with a modified AFM cantilever. The force measurement results showed that the larger diameter and the taller height of the nanopillars result in the larger adhesive force.

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Section: Replication Of Nanopillar Arraysmentioning

confidence: 98%

Replication of high-aspect-ratio nanopillar array for biomimetic gecko foot-hair prototype by UV nano embossing with anodic aluminum oxide mold

Kim

Lee

et al. 2006

Microsyst Technol

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“…(II) Nano-embossing is a promising method of nanostructure preparation, enabling inexpensive and high throughput nanofabrication. It uses a nanostructured stamp to transfer the pattern to the substrate surface via an embossing process [34]. (III) Etching is a subtractive method that selectively removes materials from the substrate.…”

Section: Nanostructure Preparation Techniquesmentioning

confidence: 99%

Nanostructured substrates for isolation of circulating tumor cells

et al. 2013

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Summary Circulating tumor cells (CTCs) originate from the primary tumor mass and enter into the peripheral bloodstream. CTCs hold the key to understanding the biology of metastasis and also play a vital role in cancer diagnosis, prognosis, disease monitoring, and personalized therapy. However, CTCs are rare in blood and hard to isolate. Additionally, the viability of CTCs can easily be compromised under high shear stress while releasing them from a surface. The heterogeneity of CTCs in biomarker expression makes their isolation quite challenging; the isolation efficiency and specificity of current approaches need to be improved. Nanostructured substrates have emerged as a promising biosensing platform since they provide better isolation sensitivity at the cost of specificity for CTC isolation. This review discusses major challenges faced by CTC isolation techniques and focuses on nanostructured substrates as a platform for CTC isolation.

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“…And it does not need any precise alignment steps. The fabricated two-level polymeric microstructure can be used as a mother structure of a nickel electroforming process, resulting in a robust metallic mold insert for mass replication techniques such as micro injection molding (Lee et al 2004), hot embossing (Heckele et al 1998), and/or UV embossing (Lee et al 2007). As an example of the proposed fabrication method, a polymeric high aspect ratio microstructure with smaller square microstructures (200 9 200 9 90 lm) on its top surface was firstly fabricated.…”

Section: Introductionmentioning

confidence: 99%

Fabrication method of two-level polymeric microstructure with the help of deep X-ray lithography

Lee

Kwon

2008

Microsyst Technol

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Two-or multi-level microstructures are getting more important in several applications such as multicomponent micro optical elements and various microfluidic systems. In the present study, a simple and efficient method is newly proposed for a fabrication of the two-level polymeric microstructures. Making a mother two-level microstructure consists of two processes: (1) the hot embossing process for a fabrication of microstructures on a PMMA substrate, and (2) the deep X-ray lithography using the hot embossed substrate for a high aspect ratio microstructure fabrication, resulting in a high aspect ratio microstructure containing smaller microstructures on its surface. Making use of so fabricated two-level microstructures as a mother structure, one could achieve a mass replication of the same microstructures via injection molding process with a metallic mold insert obtained by a nickel electroforming onto the mother microstructure. In order to demonstrate the proposed method, a polymeric high aspect ratio microstructure having smaller square microstructures on its top surface was fabricated. The fabricated two-level microstructure shows fine vertical sidewalls, which is a characteristic feature of the deep Xray lithography. In addition, a metallic mold insert for a mass replication was fabricated by a nickel electroforming process.

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UV nano embossing for polymer nano structures with non-transparent mold insert

Cited by 20 publications

References 9 publications

Replication of high-aspect-ratio nanopillar array for biomimetic gecko foot-hair prototype by UV nano embossing with anodic aluminum oxide mold

Replication of high-aspect-ratio nanopillar array for biomimetic gecko foot-hair prototype by UV nano embossing with anodic aluminum oxide mold

Nanostructured substrates for isolation of circulating tumor cells

Fabrication method of two-level polymeric microstructure with the help of deep X-ray lithography

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