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Title: Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance

Abstract

Particle sizes of manganese oxide (β-MnO₂) powders were modified by using a mortar and pestle ground method for period of times that varied between 15–60 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of β-MnO₂ powders as a function of electrical resistance in the range of R P = 10 - 80Ω were measured. Based on the data presented, we propose a model for the β-MnO₂ system in which nanometer-scale MnO₂ crystallites bond together through weak van der Waals forces to form larger conglomerates that span in size from nanometer to micrometer scale.

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. James Madison Univ., Harrisonburg, VA (United States). Dept. of Physics and Astronomy
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Div.
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1212700
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale Research Letters
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 1931-7573
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; thermoelectric properties; transition metal oxides; manganese oxide; seebeck coefficient; figure of merit; particle size versus electrical resistance

Citation Formats

Hedden, Morgan, Francis, Nick, Haraldsen, Jason T., Ahmed, Towfiq, and Constantin, Costel. Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance. United States: N. p., 2015. Web. doi:10.1186/s11671-015-1000-6.
Hedden, Morgan, Francis, Nick, Haraldsen, Jason T., Ahmed, Towfiq, & Constantin, Costel. Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance. United States. doi:10.1186/s11671-015-1000-6.
Hedden, Morgan, Francis, Nick, Haraldsen, Jason T., Ahmed, Towfiq, and Constantin, Costel. Wed . "Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance". United States. doi:10.1186/s11671-015-1000-6. https://www.osti.gov/servlets/purl/1212700.
@article{osti_1212700,
title = {Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance},
author = {Hedden, Morgan and Francis, Nick and Haraldsen, Jason T. and Ahmed, Towfiq and Constantin, Costel},
abstractNote = {Particle sizes of manganese oxide (β-MnO₂) powders were modified by using a mortar and pestle ground method for period of times that varied between 15–60 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of β-MnO₂ powders as a function of electrical resistance in the range of RP = 10 - 80Ω were measured. Based on the data presented, we propose a model for the β-MnO₂ system in which nanometer-scale MnO₂ crystallites bond together through weak van der Waals forces to form larger conglomerates that span in size from nanometer to micrometer scale.},
doi = {10.1186/s11671-015-1000-6},
journal = {Nanoscale Research Letters},
number = 1,
volume = 10,
place = {United States},
year = {2015},
month = {7}
}

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