NANO-motheye antireflection pattern by plasma treatment of polymers

Kaless, Antje; Schulz, Ulrike; Munzert, Peter; Kaiser, Norbert

doi:10.1016/j.surfcoat.2005.01.067

Cited by 135 publications

(75 citation statements)

References 9 publications

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“…[27][28][29][30] In order to produce polymer nanostructures, hot embossing through a mold is applied in the pre-mentioned fabrication techniques. During the hot embossing procedure, the system is heated above the glass transition temperature of the polymer and a desired pressure is applied.…”

Section: -11mentioning

confidence: 99%

Soft biomimetic tapered nanostructures for large-area antireflective surfaces and SERS sensing

et al. 2013

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We report a facile fabrication method for the fabrication of functional large area nanostructured polymer films using a drop casting technique. Reusable and tapered silicon molds were utilized in the production of functional polymers providing rapid fabrication of the paraboloid nanostructures at the desired structural heights without the requirement of any complex production conditions, such as high temperature or pressure. The fabricated polymer films demonstrate promising qualities in terms of antireflective, hydrophobic and surface enhanced Raman spectroscopy (SERS) features. We achieved up to 92% transmission from the single-side nanostructured polymer films by implementing optimized nanostructure parameters which were determined using a finite difference time domain (FDTD) method prior to production. Large-area nanostructured films were observed to enhance the Raman signal with an enhancement factor of 4.9 Â 10 6 compared to bare film, making them potentially suitable as freestanding SERS substrates. The utilized fabrication method with its demonstrated performances and reliable material properties, paves the way for further possibilities in biological, optical, and electronic applications.

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Section: -11mentioning

confidence: 99%

Soft biomimetic tapered nanostructures for large-area antireflective surfaces and SERS sensing

et al. 2013

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“…For example, if such a rough surface is coated with a low-surface-energy-film an increase in hydrophobicity will be observed leading to dramatic increases of the contact angle of water and oils (1) (2), (3), and eventually to a surface on which liquids roll, thus permitting self-cleaning action (4), (5) (6) of the surface. Another example where nanotexture is beneficial is when antireflectivity is desired: Etch-induced nanoroughness is known to reduce reflectivity for both Si (the "black Silicon" being a well known example (7)) and polymers for which the so called "nanomotheye" plasma roughening has been proposed (8). In fact for polymers plasma nanotexturing can simultaneously achieve optical transparency, antireflectivity and superhydrophobicity (1,9) .…”

Section: Introductionmentioning

confidence: 99%

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Gogolides¹,

Constantoudis²,

Kokkoris³

et al. 2011

J. Phys. D: Appl. Phys.

119

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We describe how plasma-wall interactions in etching plasmas lead to either random roughening / nanotexturing of polymeric and Silicon surfaces, or formation of organized nanostructures on such surfaces. We conduct carefully designed experiments of plasma-wall interactions to understand the causes of both phenomena, and present Monte-Carlo simulation results confirming the experiments. We discuss emerging applications in wetting and optical property control, protein adsorption, microfluidics and lab-on-a-chip fabrication and modification, and cost-effective silicon mold fabrication. We conclude with an outlook on the plasma reactor future designs to take advantage of the observed phenomena for new micro and nanomanufacturing processes.

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“…Early reports on motheye structures deal with periodic profi les [51] . More recent investigations have shown that stochastic motheye structures on polymer surfaces can be prepared by a plasma etching process in high vacuum [52] .…”

Section: Motheye Structures As Low Effective Index Fi Lms For Antirefmentioning

confidence: 99%

“…Measured transmittance of a PMMA sheet with motheye structures designed for maximum antirefl ection effect in the VIS on both sides, at different angles of incidence [52] . Polarization is average.…”

Section: Figure 10mentioning

confidence: 99%

Tailoring optical and non-optical properties of interference coating materials through the explicit use of small-scale optical inhomogeneities

Stenzel

Schulz

Kaiser

2012

Advanced Optical Technologies

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Although optical coating deposition techniques have been perfected over decades to prepare optically homogeneous dense coatings with smallest surface roughness, nanostructuring of optical coatings has proven as an effective mechanism to further enhance their performance while reducing their thickness in special cases. Therefore, nanostructure effects can be tackled as additional degrees of freedom for coating design, and can even lead to useful property combinations that are inaccessible to ' classical ' coatings prepared on the basis of the traditionally available coating materials. Examples include metal island fi lms as building blocks for spectrally selective absorber coatings for color management or solar energy conversion purposes, as well as motheye structures for antirefl ection coatings and the combined optimization of optical and non-optical coating properties.

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NANO-motheye antireflection pattern by plasma treatment of polymers

Cited by 135 publications

References 9 publications

Soft biomimetic tapered nanostructures for large-area antireflective surfaces and SERS sensing

Soft biomimetic tapered nanostructures for large-area antireflective surfaces and SERS sensing

Controlling roughness: from etching to nanotexturing and plasma-directed organization on organic and inorganic materials

Tailoring optical and non-optical properties of interference coating materials through the explicit use of small-scale optical inhomogeneities

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