Abstract
This work presents a superhydrophobic antireflective (AR) coating on glass. The coating consists of a grass-like alumina layer capped with plasma-deposited fluoropolymer. The grass-like alumina is formed by hot water treatment of atomic layer-deposited alumina on glass, and the fluoropolymer is plasma-deposited from CHF3. Excellent broadband AR performance is observed in the visible spectrum with an average transmission of 94.9% for single-sided coated glass, which is close to the maximum 95.3% possible for this glass. Extremely desirable contact angles are obtained with 5-7 min-long fluoropolymer treatments on grass-like alumina with 173° advancing and 160° receding contact angles. This type of multifunctional coating can be beneficial in a multitude of applications like self-cleaning AR coating for solar panels, windows in high-rise buildings, sensors, and aerospace applications as well as just utilizing the excellent water repellent behavior in applications where only superhydrophobicity is required.
| Original language | English |
|---|---|
| Pages (from-to) | 49957-49962 |
| Number of pages | 6 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 12 |
| Issue number | 44 |
| DOIs | |
| Publication status | Published - 4 Nov 2020 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors thank Business Finland (project: NANOGRA 6615/31/2019) for financial support and Academy of Finland (project: PREIN Flagship 320187). The authors recognize Micronova Nanofabrication Center and Nanomicroscopy Center at OtaNano, Aalto University for provision of facilities and technical support. The authors especially acknowledge Dr. Ville Jokinen for the advice on tensiometry.
Keywords
- antireflective coating
- atomic layer deposition
- nanostructures
- optical coating
- self-cleaning
- superhydrophobic
