Work

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

Year: 2015

Type: article

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.

Source: Nanoscale Research Letters

DOI: 10.1186/s11671-015-1000-6

Authors: Morgan Hedden, Nick Francis, Jason T Haraldsen, Towfiq Ahmed, Costel Constantin

Institutions: James Madison University, Los Alamos National Laboratory

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,790

Funders: U.S. Department of Energy, James Madison University, National Nuclear Security Administration, Los Alamos National Laboratory