Paper
15 October 2012 Nano-microstructured, superhydrophobic, and near-infrared antireflective thin films on glass
Kelly C. Camargo, Fabiano S. Rodembusch, Alexandre Fassini Michels, Flavio Horowitz
Author Affiliations +
Abstract
Superhydrophobic surfaces were produced on glass with self-cleaning and wide-angle anti-reflection in the near-infrared (1.0-2.1μm). These properties resulted from a combination of surface energy and nano/micro-structured topology based on silica nanoparticles (NPs), index grading and interference. In a two-layer approach (glass/silica NPs/PTFE), a water contact angle (WCA) of 169°±2°was attained with very low hysteresis (≤ 2°), as well as high transmittance (93-94% at normal incidence). In a three-layer approach (glass/silica NPs/silica aerogel/PTFE), surfaces were produced with WCA of 158°±2°, also very low hysteresis (< 5°), and significant antireflection. This allowed for a normal transmittance of 99.5% or higher, which decreased less than 2% at +20° incidence. These results show that pronounced wide-angle antireflection and self-cleaning properties can be simultaneously attained by proper glass coating. Present advantages and limitations for potential applications are discussed.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kelly C. Camargo, Fabiano S. Rodembusch, Alexandre Fassini Michels, and Flavio Horowitz "Nano-microstructured, superhydrophobic, and near-infrared antireflective thin films on glass", Proc. SPIE 8465, Nanostructured Thin Films V, 84650K (15 October 2012); https://doi.org/10.1117/12.931312
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KEYWORDS
Nanoparticles

Silica

Glasses

Antireflective coatings

Transmittance

Coating

Liquids

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