skip to main content

SciTech ConnectSciTech Connect

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

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.
 [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:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nanoscale Research Letters
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 1931-7573
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE thermoelectric properties; transition metal oxides; manganese oxide; seebeck coefficient; figure of merit; particle size versus electrical resistance