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| Naji, M. |
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| Ertürk, Emre |
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| Azam, Siraj |
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| Azevedo, Nuno Monteiro |
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Dushaq, Ghada
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Publications (7/7 displayed)
- 2022Exceptionally high work density of a ferroelectric dynamic organic crystal around room temperaturecitations
- 2020Strong enhancement of direct transition photoluminescence at room temperature for highly tensile-strained Ge decorated using 5 nm gold nanoparticlescitations
- 2020Tuning the photoluminescence of few-layer MoS2nanosheets by mechanical nanostamping for broadband optoelectronic applicationscitations
- 2019Hexagonal germanium formation at room temperature using controlled penetration depth nano-indentationcitations
- 2019Integration of metal- GaAs -Metal photodetectors on si using thin ge buffer layers for applications in visible photonics
- 2018Passivation of Ge/high-κ interface using RF Plasma nitridationcitations
- 2017Germanium MOS capacitors grown on Silicon using low temperature RF-PECVDcitations
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article
Exceptionally high work density of a ferroelectric dynamic organic crystal around room temperature
Abstract
<p>Dynamic organic crystals are rapidly gaining traction as a new class of smart materials for energy conversion, however, they are only capable of very small strokes (<12%) and most of them operate through energetically cost-prohibitive processes at high temperatures. We report on the exceptional performance of an organic actuating material with exceedingly large stroke that can reversibly convert energy into work around room temperature. When transitioning at 295–305 K on heating and at 265–275 K on cooling the ferroelectric crystals of guanidinium nitrate exert a linear stroke of 51%, the highest value observed with a reversible operation of an organic single crystal actuator. Their maximum force density is higher than electric cylinders, ceramic piezoactuators, and electrostatic actuators, and their work capacity is close to that of thermal actuators. This work demonstrates the hitherto untapped potential of ionic organic crystals for applications such as light-weight capacitors, dielectrics, ferroelectric tunnel junctions, and thermistors.</p>