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Title: Solution-derived monolithic thin films with low adhesion surface

Abstract

Nanostructured thin films were synthesized using a silica-based sol-gel method. The morphology of the films was tailored by controlling the hydrolysis and crosslinking mechanisms of the tetraethyl orthosilicate precursor. Silica nanoparticle self-assembled structures and linear silica chains were crosslinked and formed monolithic nanostructured films. The self-assembly mechanism was investigated using coarse-grained molecular dynamic simulation. Three nanostructured configurations were synthesized and studied to optimize the surface features of the films and minimize the adhesion of sand particles. Surface microscopy imaging and adhesion force measurements using atomic force microscopy with an attached silica particle on the cantilever tip were performed to correlate the adhesion force and the surface structure. The solar specular reflectance of coated solar mirror samples was measured across the solar spectrum before and after the soiling test of the samples. The mechanical properties of the thin films were evaluated using nanoindentation measurements on coated substrates. Here, the solution-derived thin film coatings can provide anti-soiling protection of solar glass in desert environments and increase the efficiency of photovoltaic and concentrated solar power installations.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [3]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Dong-Eui Univ., Busan (South Korea)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1607096
Alternate Identifier(s):
OSTI ID: 1600575
Grant/Contract Number:  
AC05-00OR22725; AC02-05CH11231; BT0304020
Resource Type:
Accepted Manuscript
Journal Name:
Solar Energy Materials and Solar Cells
Additional Journal Information:
Journal Volume: 206; Journal Issue: C; Journal ID: ISSN 0927-0248
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; anti-soiling; nanostructured thin film; adhesion force; solar specular reflectance; molecular dynamics

Citation Formats

Park, Jaehyeung, Sharma, Jaswinder, Goswami, Monojoy, Voylov, Dmitry, Jang, Gyoung Gug, Lassiter, Matthew G., Marquez-Rossy, Andres, and Polizos, Georgios. Solution-derived monolithic thin films with low adhesion surface. United States: N. p., 2019. Web. https://doi.org/10.1016/j.solmat.2019.110302.
Park, Jaehyeung, Sharma, Jaswinder, Goswami, Monojoy, Voylov, Dmitry, Jang, Gyoung Gug, Lassiter, Matthew G., Marquez-Rossy, Andres, & Polizos, Georgios. Solution-derived monolithic thin films with low adhesion surface. United States. https://doi.org/10.1016/j.solmat.2019.110302
Park, Jaehyeung, Sharma, Jaswinder, Goswami, Monojoy, Voylov, Dmitry, Jang, Gyoung Gug, Lassiter, Matthew G., Marquez-Rossy, Andres, and Polizos, Georgios. Fri . "Solution-derived monolithic thin films with low adhesion surface". United States. https://doi.org/10.1016/j.solmat.2019.110302. https://www.osti.gov/servlets/purl/1607096.
@article{osti_1607096,
title = {Solution-derived monolithic thin films with low adhesion surface},
author = {Park, Jaehyeung and Sharma, Jaswinder and Goswami, Monojoy and Voylov, Dmitry and Jang, Gyoung Gug and Lassiter, Matthew G. and Marquez-Rossy, Andres and Polizos, Georgios},
abstractNote = {Nanostructured thin films were synthesized using a silica-based sol-gel method. The morphology of the films was tailored by controlling the hydrolysis and crosslinking mechanisms of the tetraethyl orthosilicate precursor. Silica nanoparticle self-assembled structures and linear silica chains were crosslinked and formed monolithic nanostructured films. The self-assembly mechanism was investigated using coarse-grained molecular dynamic simulation. Three nanostructured configurations were synthesized and studied to optimize the surface features of the films and minimize the adhesion of sand particles. Surface microscopy imaging and adhesion force measurements using atomic force microscopy with an attached silica particle on the cantilever tip were performed to correlate the adhesion force and the surface structure. The solar specular reflectance of coated solar mirror samples was measured across the solar spectrum before and after the soiling test of the samples. The mechanical properties of the thin films were evaluated using nanoindentation measurements on coated substrates. Here, the solution-derived thin film coatings can provide anti-soiling protection of solar glass in desert environments and increase the efficiency of photovoltaic and concentrated solar power installations.},
doi = {10.1016/j.solmat.2019.110302},
journal = {Solar Energy Materials and Solar Cells},
number = C,
volume = 206,
place = {United States},
year = {2019},
month = {11}
}