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Pyrolytic carbon resonators for micromechanical thermal analysis
Thermal analysis is essential for the characterization of polymers and drugs. However, the currently established methods require a large amount of sample. Here, we present pyrolytic carbon resonators as promising tools for micromechanical thermal analysis (MTA) of nanograms of polymers. Doubly clamp...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803650/ https://www.ncbi.nlm.nih.gov/pubmed/31646000 http://dx.doi.org/10.1038/s41378-019-0094-x |
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author | Nguyen, Long Quang Larsen, Peter Emil Larsen, Tom Goswami, Sanjukta Bose Villanueva, Luis Guillermo Boisen, Anja Keller, Stephan Sylvest |
author_facet | Nguyen, Long Quang Larsen, Peter Emil Larsen, Tom Goswami, Sanjukta Bose Villanueva, Luis Guillermo Boisen, Anja Keller, Stephan Sylvest |
author_sort | Nguyen, Long Quang |
collection | PubMed |
description | Thermal analysis is essential for the characterization of polymers and drugs. However, the currently established methods require a large amount of sample. Here, we present pyrolytic carbon resonators as promising tools for micromechanical thermal analysis (MTA) of nanograms of polymers. Doubly clamped pre-stressed beams with a resonance frequency of 233 ± 4 kHz and a quality factor (Q factor) of 800 ± 200 were fabricated. Optimization of the electrical conductivity of the pyrolytic carbon allowed us to explore resistive heating for integrated temperature control. MTA was achieved by monitoring the resonance frequency and quality factor of the carbon resonators with and without a deposited sample as a function of temperature. To prove the potential of pyrolytic carbon resonators as thermal analysis tools, the glass transition temperature (T(g)) of semicrystalline poly(L-lactic acid) (PLLA) and the melting temperature (T(m)) of poly(caprolactone) (PCL) were determined. The results show that the T(g) of PLLA and T(m) of PCL are 61.0 ± 0.8 °C and 60.0 ± 1.0 °C, respectively, which are in excellent agreement with the values measured by differential scanning calorimetry (DSC). |
format | Online Article Text |
id | pubmed-6803650 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-68036502019-10-23 Pyrolytic carbon resonators for micromechanical thermal analysis Nguyen, Long Quang Larsen, Peter Emil Larsen, Tom Goswami, Sanjukta Bose Villanueva, Luis Guillermo Boisen, Anja Keller, Stephan Sylvest Microsyst Nanoeng Article Thermal analysis is essential for the characterization of polymers and drugs. However, the currently established methods require a large amount of sample. Here, we present pyrolytic carbon resonators as promising tools for micromechanical thermal analysis (MTA) of nanograms of polymers. Doubly clamped pre-stressed beams with a resonance frequency of 233 ± 4 kHz and a quality factor (Q factor) of 800 ± 200 were fabricated. Optimization of the electrical conductivity of the pyrolytic carbon allowed us to explore resistive heating for integrated temperature control. MTA was achieved by monitoring the resonance frequency and quality factor of the carbon resonators with and without a deposited sample as a function of temperature. To prove the potential of pyrolytic carbon resonators as thermal analysis tools, the glass transition temperature (T(g)) of semicrystalline poly(L-lactic acid) (PLLA) and the melting temperature (T(m)) of poly(caprolactone) (PCL) were determined. The results show that the T(g) of PLLA and T(m) of PCL are 61.0 ± 0.8 °C and 60.0 ± 1.0 °C, respectively, which are in excellent agreement with the values measured by differential scanning calorimetry (DSC). Nature Publishing Group UK 2019-10-21 /pmc/articles/PMC6803650/ /pubmed/31646000 http://dx.doi.org/10.1038/s41378-019-0094-x Text en © The Author(s) 2019 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Nguyen, Long Quang Larsen, Peter Emil Larsen, Tom Goswami, Sanjukta Bose Villanueva, Luis Guillermo Boisen, Anja Keller, Stephan Sylvest Pyrolytic carbon resonators for micromechanical thermal analysis |
title | Pyrolytic carbon resonators for micromechanical thermal analysis |
title_full | Pyrolytic carbon resonators for micromechanical thermal analysis |
title_fullStr | Pyrolytic carbon resonators for micromechanical thermal analysis |
title_full_unstemmed | Pyrolytic carbon resonators for micromechanical thermal analysis |
title_short | Pyrolytic carbon resonators for micromechanical thermal analysis |
title_sort | pyrolytic carbon resonators for micromechanical thermal analysis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803650/ https://www.ncbi.nlm.nih.gov/pubmed/31646000 http://dx.doi.org/10.1038/s41378-019-0094-x |
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