Publication detail

Superhydrophobic-Oleophobic Visible-Transparent Antireflective Nanostructured Anodic HfO2 Multifunctional Coatings for Potential Solar Panel Applications

SEPÚLVEDA SEPÚLVEDA, L. KAMNEV, K. PYTLÍČEK, Z. PRÁŠEK, J. MOZALEV, A.

Original Title

Superhydrophobic-Oleophobic Visible-Transparent Antireflective Nanostructured Anodic HfO2 Multifunctional Coatings for Potential Solar Panel Applications

Type

journal article in Web of Science

Language

English

Original Abstract

The fabrication of superhydrophobic-oleophobic HfO2 coatings presents a challenge. Here, we synthesize via the self-organized anodizing of aluminum-on-hafnium layers sputter-deposited onto SiO2 and glass substrate arrays of highly aligned HfO2 nanostructures of dissimilar shapes, sizes, spacings, and population densities termed as nanorods, nanopillars, nanohoodoos, and nanopillars-in-domains, which were then modified with various self-assembled monolayers. The treatment in fluoroalkyl-trimethoxysilane (FAS-17) appeared to be the most effective in making the hafnium-oxide nanoarrays superhydrophobic, with water contact angles of 153 degrees (nanopillars), 155 degrees (nanorods), 160 degrees (nanohoodoos), and 174 degrees (nanopillars-in-domains), the latter revealing the smallest roll-off angle of <1 degrees. The FAS-17-modified HfO2 nanorods and pillars-in-domains demonstrated the best oleophobic properties with a contact angle for ethylene glycol of 140 degrees and for rapeseed oil of 121 degrees. In addition, the HfO2 nanorod films were highly transparent and antireflective in the visible spectral range and substantially less transparent and increasingly reflective in the near infrared. An outstanding combination of robust superhydrophobic-oleophobic properties with the specific optical behavior of the HfO2 nanoarrays makes them attractive for application as self-cleaning visible-transparent heat-repelling dielectric coatings for solar cell coverglass and concentrator photovoltaics.

Keywords

anodizing; porous anodic alumina; HfO2; water contact angle; superhydrophobic; oleophobic; antireflective; solar cell

Authors

SEPÚLVEDA SEPÚLVEDA, L.; KAMNEV, K.; PYTLÍČEK, Z.; PRÁŠEK, J.; MOZALEV, A.

Released

4. 2. 2021

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

2574-0970

Periodical

ACS Applied Nano Materials

Year of study

4

Number

2

State

United States of America

Pages from

1754

Pages to

1765

Pages count

12

URL

https://pubs.acs.org/doi/10.1021/acsanm.0c03202

BibTex

@article{BUT173171,
  author="Lina Marcela {Sepúlveda Sepúlveda} and Kirill {Kamnev} and Zdeněk {Pytlíček} and Jan {Prášek} and Alexander {Mozalev}",
  title="Superhydrophobic-Oleophobic Visible-Transparent Antireflective Nanostructured Anodic HfO2 Multifunctional Coatings for Potential Solar Panel Applications",
  journal="ACS Applied Nano Materials",
  year="2021",
  volume="4",
  number="2",
  pages="1754--1765",
  doi="10.1021/acsanm.0c03202",
  issn="2574-0970",
  url="https://pubs.acs.org/doi/10.1021/acsanm.0c03202"
}