Efficient Water Evaporation Using Black Silicon
The black silicon (b-Si)─plasma-etched nanostructured surface of crystalline Si─was used as a light absorber due to its extremely low reflectivity (<1%) at the visible-to-near-IR spectral range. Flat Fresnel lenses of 1.47 and 0.36 m2 were used to focus light onto b-Si, which was a photothermal absorber. Experiments to distill water were carried out from October 2021 to April 2022 in Obihiro (42°55′N 143°12′E), Hokkaido, Northern Japan. The same b-Si has biocidal properties (antibactericidal, antiviral, and antifungal) due to mechanical nanoscale needles, which complement the water purification when gray water sources are used in applications.
Authors
- Saulius Juodkazis (ORCID: https://orcid.org/0000-0003-3542-3874)
- Masayuki Ohashi (ORCID: https://orcid.org/0000-0002-9295-2580)
- Tomas A. Katkus (ORCID: https://orcid.org/0000-0001-5496-046X)
- Hiroyoshi Nishijima
- Yoshiaki Nishijima (ORCID: https://orcid.org/0000-0003-0650-4536)
Institutions
- Tokyo Institute of Technology (JP)
- Vilnius University (LT)
- Yokohama National University (JP)
- Hokkaido University (JP)
- Japan Science and Technology Agency (JP)
- Optical Sciences (United States) (US)
- Laser Research Institute (CN)
- Swinburne University of Technology (AU)
Publication Details
- Journal
- ACS Sustainable Resource Management
- Published
- 2025-02-04
- DOI
- https://doi.org/10.1021/acssusresmgt.4c00418
- Citations
- 3
- Primary Topic
- Solar-Powered Water Purification Methods
- Type
- article
- Field-Weighted Citation Impact
- 1.09
Funders
- Japan Society for the Promotion of Science
- Precursory Research for Embryonic Science and Technology