Broad-band antireflection coating at near-infrared wavelengths by a breath figure
SCIE
SCOPUS
- Title
- Broad-band antireflection coating at near-infrared wavelengths by a breath figure
- Authors
- Park, MS; Kim, JK
- Date Issued
- 2005-11-22
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We prepared a porous thin film by spin-coating of a cellulose acetate butyrate (CAB) solution in tetrahydrofuran under a humid environment. Due to evaporative cooling during spin-coating, condensed water droplets were formed by a breath figure on the CAB solution, and these developed a porous structure after complete drying. By varying the solution concentration and rotating speeds, two distinct morphologies were generated: top and bottom layers with higher and lower porosities, respectively. We found that the two-layer porous film coated on glass exhibited low reflectance of less than 1% in the near-infrared (NIR) regime corresponding to wavelengths between 900 and 2200 nm. Since the porous structure was very uniform over a large area, the film could be easily, employed for broad-band antireflection coating at NIR wavelengths.
- Keywords
- SELF-ORGANIZED HONEYCOMB; POLYMER-FILMS; FLUID SURFACES; BUBBLE ARRAYS; FABRICATION; MORPHOLOGY; PATTERNS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24306
- DOI
- 10.1021/LA051273G
- ISSN
- 0743-7463
- Article Type
- Article
- Citation
- LANGMUIR, vol. 21, no. 24, page. 11404 - 11408, 2005-11-22
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