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Title: Effect of Interface Structure on the Hydrophobicity, Mechanical and Optical Properties of HfO2/Mo/HfO2 Multilayer Films

Abstract

We report on the super-hydrophobicity and tunable and optical and mechanical properties of transparent HfO2(50 nm)/Mo(20 nm)/HfO2(50 nm) multilayer films facilitated by engineering the ceramic-metal interface microstructure. A comparative study of nano-columnar and glassy (dense) structured HfO2/Mo/HfO2 multilayer films demonstrate the remarkable effect of interface structure on their hydrophobicity and mechanical properties. The nano-columnar structured multilayer films exhibit the dominance over the glassy structured stack in terms of their enhanced characteristics, namely the mechanical characteristics, anti-reflection behavior, visible transmittance, and hydrophobicity. While hydrophobicity is derived from the combined effect of hierarchical surface roughness and nano-columnar structure of the top and bottom Hf-oxide ceramic layers, the enhanced mechanical response is derived from the columnar structure of Mo metallic interlayer vertically aligned with overall multilayer stack. The combination of super-hydrophobicity and enhanced mechanical properties of optically transparent HfO2/Mo/HfO2 multilayer films through HfO2-Mo interface structure control as demonstrated in this work may provide a pathway to further tune the efficiency and in the optimization of architectures for energy-saving applications.

Authors:
 [1];  [2]; ORCiD logo [2];  [1]
  1. University of Texas at El Paso
  2. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1577842
Report Number(s):
PNNL-SA-149699
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
JOM. The Journal of the Minerals, Metals and Materials Society
Additional Journal Information:
Journal Volume: 71; Journal Issue: 10
Country of Publication:
United States
Language:
English
Subject:
EFFICIENT GLASS WINDOWS, ELECTRICAL-PROPERTIES, THIN-FILMS, MICROSTRUCTURE, TEMPERATURE, DEPENDENCE

Citation Formats

Dubey, P, Battu, Anil Krishna, Shutthanandan, Vaithiyalingam, and Ramana, C.V. Effect of Interface Structure on the Hydrophobicity, Mechanical and Optical Properties of HfO2/Mo/HfO2 Multilayer Films. United States: N. p., 2019. Web. doi:10.1007/s11837-019-03614-5.
Dubey, P, Battu, Anil Krishna, Shutthanandan, Vaithiyalingam, & Ramana, C.V. Effect of Interface Structure on the Hydrophobicity, Mechanical and Optical Properties of HfO2/Mo/HfO2 Multilayer Films. United States. doi:10.1007/s11837-019-03614-5.
Dubey, P, Battu, Anil Krishna, Shutthanandan, Vaithiyalingam, and Ramana, C.V. Tue . "Effect of Interface Structure on the Hydrophobicity, Mechanical and Optical Properties of HfO2/Mo/HfO2 Multilayer Films". United States. doi:10.1007/s11837-019-03614-5.
@article{osti_1577842,
title = {Effect of Interface Structure on the Hydrophobicity, Mechanical and Optical Properties of HfO2/Mo/HfO2 Multilayer Films},
author = {Dubey, P and Battu, Anil Krishna and Shutthanandan, Vaithiyalingam and Ramana, C.V.},
abstractNote = {We report on the super-hydrophobicity and tunable and optical and mechanical properties of transparent HfO2(50 nm)/Mo(20 nm)/HfO2(50 nm) multilayer films facilitated by engineering the ceramic-metal interface microstructure. A comparative study of nano-columnar and glassy (dense) structured HfO2/Mo/HfO2 multilayer films demonstrate the remarkable effect of interface structure on their hydrophobicity and mechanical properties. The nano-columnar structured multilayer films exhibit the dominance over the glassy structured stack in terms of their enhanced characteristics, namely the mechanical characteristics, anti-reflection behavior, visible transmittance, and hydrophobicity. While hydrophobicity is derived from the combined effect of hierarchical surface roughness and nano-columnar structure of the top and bottom Hf-oxide ceramic layers, the enhanced mechanical response is derived from the columnar structure of Mo metallic interlayer vertically aligned with overall multilayer stack. The combination of super-hydrophobicity and enhanced mechanical properties of optically transparent HfO2/Mo/HfO2 multilayer films through HfO2-Mo interface structure control as demonstrated in this work may provide a pathway to further tune the efficiency and in the optimization of architectures for energy-saving applications.},
doi = {10.1007/s11837-019-03614-5},
journal = {JOM. The Journal of the Minerals, Metals and Materials Society},
number = 10,
volume = 71,
place = {United States},
year = {2019},
month = {10}
}

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