Format:
Online-Ressource
ISSN:
1521-3935
Content:
Anti‐reflection (AR) coatings designed for glass and other rigid, inorganic substrates are commercially available; however, these inorganic AR coatings tend to crack or delaminate on flexible substrates. A polymeric film with a gradient refractive index (GRIN) profile would make an ideal AR coating for flexible substrates, but such coatings are challenging to fabricate using traditional, solution‐based techniques. Emulsion‐based resonant infrared, matrix‐assisted pulsed laser evaporation (RIR‐MAPLE) offers a straightforward approach to enabling the desired GRIN profile in polymeric materials. Two homopolymers (polystyrene (PS) and poly (methyl methacrylate) (PMMA)) are deposited as a blend and one component (PMMA) is dissolved, leaving behind a porous PS film. The porosity and refractive index (RI) are controlled by the volume ratio of the two homopolymers in the film. Structural and optical characterizations, as well as comparison to modeled optical properties, confirm that porous films fabricated from polymer blends deposited by RIR‐MAPLE behave as effective media over most of the visible spectrum. While evidence for the partial collapse of the porous polymer networks is observed, the RI of the porous films is reduced from that of the bulk material. Importantly, these studies demonstrate that RIR‐MAPLE should enable broadband, omnidirectional, polymeric AR coatings appropriate for flexible substrates.
In:
volume:214
In:
number:23
In:
year:2013
In:
pages:2643-2650
In:
extent:8
In:
Macromolecular chemistry and physics, Weinheim : Wiley-VCH, 1947-, 214, Heft 23 (2013), 2643-2650 (gesamt 8), 1521-3935
Language:
English
DOI:
10.1002/macp.201300465
URN:
urn:nbn:de:101:1-2023020208011725600663
URL:
https://doi.org/10.1002/macp.201300465
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2023020208011725600663
URL:
https://d-nb.info/1279825901/34
URL:
https://doi.org/10.1002/macp.201300465
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