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Pitchimani R, Burnham AK, Weeks BL. Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope. J Phys Chem B. 2007;111(31):9182-5doi: 10.1021/jp073516e.
Pitchimani, R., Burnham, A. K., & Weeks, B. L. (2007). Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope. The journal of physical chemistry. B, 111(31), 9182-5. https://doi.org/10.1021/jp073516e
Pitchimani, Rajasekar, et al. "Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope." The journal of physical chemistry. B vol. 111,31 (2007): 9182-5. doi: https://doi.org/10.1021/jp073516e
Pitchimani R, Burnham AK, Weeks BL. Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope. J Phys Chem B. 2007 Aug 09;111(31):9182-5. doi: 10.1021/jp073516e. Epub 2007 Jul 14. PMID: 17630792.
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J Phys Chem B. 2007 Aug 09;111(31):9182-5. doi: 10.1021/jp073516e. Epub 2007 Jul 14.

Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope.

The journal of physical chemistry. B

Rajasekar Pitchimani, Alan K Burnham, Brandon L Weeks

Affiliations

  1. Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, USA. [email protected]

PMID: 17630792 DOI: 10.1021/jp073516e

Abstract

Atomic force microscopy (AFM) has been successfully used to study the activation energy for evaporation of pentaerythritol tetranitrate (PETN) nanoislands formed by spin coating. These islands are annealed isothermally in the temperature range of 30-70 degrees C for a given time and are scanned with AFM in contact mode at room temperature. The volume of these islands does not change significantly up to about 35-40 degrees C indicating that sublimation is not significant below 40 degrees C. Above 40 degrees C, the islands start shrinking, and the rate of weight loss is analyzed as a function of temperature. The activation energy of evaporation using AFM was found to be similar to that for bulk PETN crystals using thermogravimetric analysis (TGA) at higher temperatures (110-135 degrees C). These results demonstrate that AFM is a useful tool to measure thermodynamic properties with a nanoscale probe.

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