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Title: Pore architecture of nanoporous gold and titania by hydrogen thermoporometry

Abstract

Nanoporous gold (NPG) and materials derived from it by templating have complex pore architecture that determines their technologically relevant physical properties. Here, we apply high-resolution hydrogen thermoporometry to study the pore structure of NPG and NPG-derived titania nanofoam (TNF). Results reveal complex multimodal pore size distributions for NPG and TNF. The freezing–melting hysteresis is pronounced, with freezing and melting scans having entirely different shapes. Experiments involving partial freeze–melt cycles reveal the lack of direct correlation between individual freezing and melting peaks, pointing to phenomena that are beyond the Gibbs-Thomson formalism. The depression of the average freezing temperature scales linearly with the ratio of the internal surface area (measured by gas sorption) and the total pore volume derived from the density of monoliths. In conclusion, thermoporometry yields total pore volumes in good agreement with those derived from monolith densities for both NPG and TNF.

Authors:
 [1];  [1];  [1];  [1];  [1]
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1410045
Alternate Identifier(s):
OSTI ID: 1228662
Report Number(s):
LLNL-JRNL-666741
Journal ID: ISSN 0021-8979
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 2; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Johnston, L. T., Biener, M. M., Ye, J. C., Baumann, T. F., and Kucheyev, S. O. Pore architecture of nanoporous gold and titania by hydrogen thermoporometry. United States: N. p., 2015. Web. doi:10.1063/1.4926738.
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Johnston, L. T., Biener, M. M., Ye, J. C., Baumann, T. F., & Kucheyev, S. O. Pore architecture of nanoporous gold and titania by hydrogen thermoporometry. United States. https://doi.org/10.1063/1.4926738
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Johnston, L. T., Biener, M. M., Ye, J. C., Baumann, T. F., and Kucheyev, S. O. Fri . "Pore architecture of nanoporous gold and titania by hydrogen thermoporometry". United States. https://doi.org/10.1063/1.4926738. https://www.osti.gov/servlets/purl/1410045.
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@article{osti_1410045,
title = {Pore architecture of nanoporous gold and titania by hydrogen thermoporometry},
author = {Johnston, L. T. and Biener, M. M. and Ye, J. C. and Baumann, T. F. and Kucheyev, S. O.},
abstractNote = {Nanoporous gold (NPG) and materials derived from it by templating have complex pore architecture that determines their technologically relevant physical properties. Here, we apply high-resolution hydrogen thermoporometry to study the pore structure of NPG and NPG-derived titania nanofoam (TNF). Results reveal complex multimodal pore size distributions for NPG and TNF. The freezing–melting hysteresis is pronounced, with freezing and melting scans having entirely different shapes. Experiments involving partial freeze–melt cycles reveal the lack of direct correlation between individual freezing and melting peaks, pointing to phenomena that are beyond the Gibbs-Thomson formalism. The depression of the average freezing temperature scales linearly with the ratio of the internal surface area (measured by gas sorption) and the total pore volume derived from the density of monoliths. In conclusion, thermoporometry yields total pore volumes in good agreement with those derived from monolith densities for both NPG and TNF.},
doi = {10.1063/1.4926738},
journal = {Journal of Applied Physics},
number = 2,
volume = 118,
place = {United States},
year = {Fri Jul 10 00:00:00 EDT 2015},
month = {Fri Jul 10 00:00:00 EDT 2015}
}
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https://doi.org/10.1063/1.4926738
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    Works referencing / citing this record:

    Carbon Nanofoam by Pulsed Electric Arc Discharges
    journal, August 2018

    • Saucedo-Jimenez, David; Medina-Sanchez, Isaac; Couder Castañeda, Carlos
    • Advances in Materials Science and Engineering, Vol. 2018
    • DOI: 10.1155/2018/7608543

    Fundamental properties of high-quality carbon nanofoam: from low to high density
    journal, January 2016

    • Frese, Natalie; Taylor Mitchell, Shelby; Neumann, Christof
    • Beilstein Journal of Nanotechnology, Vol. 7
    • DOI: 10.3762/bjnano.7.197

    Fundamental properties of high-quality carbon nanofoam: from low to high density
    journal, January 2016

    • Frese, Natalie; Taylor Mitchell, Shelby; Neumann, Christof
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