Plastic Deformation in a Molecular Crystal Enables a Piezoresistive Response |
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| Authors: | Avantika Hasija Amy J Thompson Lakhvir Singh Megha S N Kiran S R N Mangalampalli John C McMurtrie Mitradip Bhattacharjee Jack K Clegg Deepak Chopra |
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| Affiliation: | 1. Crystallography and Crystal Chemistry Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-Pass Road, Bhopal, MP, 462066 India;2. School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, 4072 Australia;3. i-lab, Electrical Engineering and Computer Science, Indian Institute of Science Education and Research Bhopal, Bhopal, MP, 462066 India;4. Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chennai, Kanchipuram, 603203 India;5. School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, 4000 Australia |
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| Abstract: | Organic materials are promising candidates for the development of efficient sensors for many medicinal and materials science applications. Single crystals of a small molecule, 4-trifluoromethyl phenyl isothiocyanate (4CFNCS), exhibit plastic deformation when bent, twisted, or coiled. Synchrotron micro-focus X-ray diffraction mapping of the bent region of the crystal confirms the mechanism of deformation. The crystals are incorporated into a flexible piezoresistive sensor using a composite constituting PEDOT: PSS/4CFNCS, which shows an impressive performance at high-pressure ranges (sensitivity 0.08 kPa−1 above 44 kPa). |
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| Keywords: | crystals devices piezoresistance plastic flexibility supramolecular |
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