Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance

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 pr...

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Detalles Bibliográficos
Autores principales: Hedden, Morgan, Francis, Nick, Haraldsen, Jason T, Ahmed, Towfiq, Constantin, Costel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4501329/
https://www.ncbi.nlm.nih.gov/pubmed/26168867
http://dx.doi.org/10.1186/s11671-015-1000-6
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author Hedden, Morgan
Francis, Nick
Haraldsen, Jason T
Ahmed, Towfiq
Constantin, Costel
author_facet Hedden, Morgan
Francis, Nick
Haraldsen, Jason T
Ahmed, Towfiq
Constantin, Costel
author_sort Hedden, Morgan
collection PubMed
description 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 - 80Ω 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.
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spelling pubmed-45013292015-07-17 Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance Hedden, Morgan Francis, Nick Haraldsen, Jason T Ahmed, Towfiq Constantin, Costel Nanoscale Res Lett Nano Express 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 - 80Ω 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. Springer US 2015-07-15 /pmc/articles/PMC4501329/ /pubmed/26168867 http://dx.doi.org/10.1186/s11671-015-1000-6 Text en © Hedden et al. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Hedden, Morgan
Francis, Nick
Haraldsen, Jason T
Ahmed, Towfiq
Constantin, Costel
Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title_full Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title_fullStr Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title_full_unstemmed Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title_short Thermoelectric Properties of Nano-Meso-Micro β-MnO(2) Powders as a Function of Electrical Resistance
title_sort thermoelectric properties of nano-meso-micro β-mno(2) powders as a function of electrical resistance
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4501329/
https://www.ncbi.nlm.nih.gov/pubmed/26168867
http://dx.doi.org/10.1186/s11671-015-1000-6
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