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Abstract
A method for fabricating scalable antireflective nanostructures on polymer surfaces (polycarbonate) is demonstrated. The
transition from small scale fabrication of nanostructures to a scalable replication technique can be quite challenging. In
this work, an area per print corresponding to a 2-inch-wafer, is presented. The initial nanopatterning is performed on SiC
in a 2-step process. Depending on the nanostructures the transmission of the SiC surface can be increased or suppressed
(average height of nanostructures ~300nm and ~600nm, respectively) while the reflectance is decreased, when compared
to a bare surface. The reflectance of SiC can be reduced down to 0.5% when the ~600nm nanostructures are applied on
the surface (bare surface reflectance 25%). The texture of the green SiC color is changed when the different
nanostructures are apparent.
The ~600nm SiC nanostructures are replicated on polymer through a process flow that involved hot embossing and
galvanization. The resulted polymer structures have similar average height and exhibit more rounded edges than the
initial SiC nanostructures. The polymer surface becomes antireflective and hydrophobic after nanostructuring. The
contact angle changes from 68 (bare) to 123 (nanostructured) degrees. The optical effect on the polymer surface can be
maximized by applying a thin aluminum (Al) layer coating on the nanostructures (bare polymer reflectance 11%,
nanostructured polymer reflectance 5%, Al coated nanostructured polymer reflectance 3%).
The optical measurements were performed with an integrating sphere and a spectrometer. The contact angles were
measured with a drop shape analyzer. The nanostructures were characterized with scanning electron microscopy.
Original language | English |
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Title of host publication | Proceedings of SPIE |
Editors | Eva M. Campo, Elizabeth A. Dobisz, Louay A. Eldada |
Number of pages | 6 |
Volume | 9556 |
Publisher | SPIE - International Society for Optical Engineering |
Publication date | 2015 |
Article number | 955607 |
DOIs | |
Publication status | Published - 2015 |
Event | Nanoengineering: Fabrication, Properties, Optics, and Devices XII - San Diego Convention Center, San Diego, United States Duration: 9 Aug 2015 → 13 Aug 2015 |
Conference
Conference | Nanoengineering: Fabrication, Properties, Optics, and Devices XII |
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Location | San Diego Convention Center |
Country/Territory | United States |
City | San Diego |
Period | 09/08/2015 → 13/08/2015 |
Series | Proceedings of SPIE - The International Society for Optical Engineering |
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ISSN | 0277-786X |
Bibliographical note
Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.Keywords
- Scalable polymer nanostructuring
- Optical effects
- Wetting effects
- Hot embossing
- Galvanization
- SiC
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Dive into the research topics of 'Scalable nanostructuring on polymer by a SiC stamp: Optical and wetting effects'. Together they form a unique fingerprint.Activities
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SPIE Optics and Photonics 2015
Argyraki, A. (Speaker)
11 Aug 2015Activity: Talks and presentations › Conference presentations
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