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The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire
In order to study the thermoelectric properties of individual nanowires, a thermoelectric nanowire characterization platform (TNCP) has been previously developed and used in our chair. Here, we report on a redesigned platform aiming to optimize performance, mechanical stability and usability. We com...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5923549/ https://www.ncbi.nlm.nih.gov/pubmed/29621147 http://dx.doi.org/10.3390/nano8040219 |
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author | Moosavi, S. Hoda Kojda, Danny Kockert, Maximilian Fischer, Saskia F. Kroener, Michael Woias, Peter |
author_facet | Moosavi, S. Hoda Kojda, Danny Kockert, Maximilian Fischer, Saskia F. Kroener, Michael Woias, Peter |
author_sort | Moosavi, S. Hoda |
collection | PubMed |
description | In order to study the thermoelectric properties of individual nanowires, a thermoelectric nanowire characterization platform (TNCP) has been previously developed and used in our chair. Here, we report on a redesigned platform aiming to optimize performance, mechanical stability and usability. We compare both platforms for electrical conductivity and the Seebeck coefficient for an individual Ag nanowire of the previously-used batch and for comparable measurement conditions. By this, the measurement performance of both designs can be investigated. As a result, whereas the electrical conductivity is comparable, the Seebeck coefficient shows a 50% deviation with respect to the previous studies. We discuss the possible effects of the platform design on the thermoelectric measurements. One reason for the deviation of the Seebeck coefficient is the design of the platform leading to temperature gradients along the bond pads. We further analyze the effect of bonding materials Au and Pt, as well as the effect of temperature distributions along the bond pads used for the thermovoltage acquisition. Another major reason for the variation of the measurement results is the non-homogeneous temperature distribution along the thermometer. We conclude that for the measurement of small Seebeck coefficients, an isothermal positioning of voltage-probing bond pads, as well as a constant temperature profile at the measurement zone are essential. |
format | Online Article Text |
id | pubmed-5923549 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-59235492018-05-03 The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire Moosavi, S. Hoda Kojda, Danny Kockert, Maximilian Fischer, Saskia F. Kroener, Michael Woias, Peter Nanomaterials (Basel) Article In order to study the thermoelectric properties of individual nanowires, a thermoelectric nanowire characterization platform (TNCP) has been previously developed and used in our chair. Here, we report on a redesigned platform aiming to optimize performance, mechanical stability and usability. We compare both platforms for electrical conductivity and the Seebeck coefficient for an individual Ag nanowire of the previously-used batch and for comparable measurement conditions. By this, the measurement performance of both designs can be investigated. As a result, whereas the electrical conductivity is comparable, the Seebeck coefficient shows a 50% deviation with respect to the previous studies. We discuss the possible effects of the platform design on the thermoelectric measurements. One reason for the deviation of the Seebeck coefficient is the design of the platform leading to temperature gradients along the bond pads. We further analyze the effect of bonding materials Au and Pt, as well as the effect of temperature distributions along the bond pads used for the thermovoltage acquisition. Another major reason for the variation of the measurement results is the non-homogeneous temperature distribution along the thermometer. We conclude that for the measurement of small Seebeck coefficients, an isothermal positioning of voltage-probing bond pads, as well as a constant temperature profile at the measurement zone are essential. MDPI 2018-04-05 /pmc/articles/PMC5923549/ /pubmed/29621147 http://dx.doi.org/10.3390/nano8040219 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Moosavi, S. Hoda Kojda, Danny Kockert, Maximilian Fischer, Saskia F. Kroener, Michael Woias, Peter The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title | The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title_full | The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title_fullStr | The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title_full_unstemmed | The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title_short | The Effect of the MEMS Measurement Platform Design on the Seebeck Coefficient Measurement of a Single Nanowire |
title_sort | effect of the mems measurement platform design on the seebeck coefficient measurement of a single nanowire |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5923549/ https://www.ncbi.nlm.nih.gov/pubmed/29621147 http://dx.doi.org/10.3390/nano8040219 |
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