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Title: Thermoelectric Properties of Nano-Meso-Micro β-MnO2 Powders as a Function of Electrical Resistance

Journal Article · · Nanoscale Research Letters
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Abstract Particle sizes of manganese oxide (β-MnO 2 ) 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-MnO 2 powders as a function of electrical resistance in the range of R P  = 10 - 80 Ω were measured. Based on the data presented, we propose a model for the β-MnO 2 system in which nanometer-scale MnO 2 crystallites bond together through weak van der Waals forces to form larger conglomerates that span in size from nanometer to micrometer scale.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
Grant code:DE-AC52-06NA25396; AC52-06NA25396
OSTI ID:
1618932
Alternate ID(s):
OSTI ID: 1212700
Journal Information:
Nanoscale Research Letters, Journal Name: Nanoscale Research Letters Vol. 10 Journal Issue: 1; ISSN 1931-7573
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (10)

Porous Manganese Oxide Octahedral Molecular Sieves and Octahedral Layered Materials journal April 2008
Giant Seebeck coefficient thermoelectric device of MnO 2 powder journal February 2012
Bulk nanostructured thermoelectric materials: current research and future prospects journal January 2009
Transition metal oxides – Thermoelectric properties journal October 2013
Fabrication and properties of four-leg oxide thermoelectric modules journal September 2005
Facile Controlled Synthesis of MnO 2 Nanostructures of Novel Shapes and Their Application in Batteries journal March 2006
Influence of Microstucture on the Charge Storage Properties of Chemically Synthesized Manganese Dioxide journal September 2002
X-ray analysis of ZnO nanoparticles by Williamson–Hall and size–strain plot methods journal January 2011
The Study of Semiconduction Properties of γ-MnO[sub 2] with Different Degrees of Reduction journal January 1989
MnO 2 -Based Thermopower Wave Sources with Exceptionally Large Output Voltages journal April 2013

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Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
36 MATERIALS SCIENCE
thermoelectric properties
transition metal oxides
manganese oxide
seebeck coefficient
figure of merit
particle size versus electrical resistance