Ultra-compact dual-band smart NEMS magnetoelectric antennas for simultaneous wireless energy harvesting and magnetic field sensing
| Autor: | Adam Khalifa, Xianfeng Liang, Hwaider Lin, Nikita Mirchandani, Isabel Martos-Repath, Gaurav Jha, Ankit Mittal, Sydney S. Cash, Nian X. Sun, Mehdi Nasrollahpour, Marvin Onabajo, Neville Sun, Aatmesh Shrivastava, Alexei Matyushov, Mohsen Zaeimbashi, Huaihao Chen, Anthony Romano, Cunzheng Dong, Ziyue Xu, Diptashree Das |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Science General Physics and Astronomy General Biochemistry Genetics and Molecular Biology Article Mice Electronic and spintronic devices Electronic devices Wireless Animals Nanotechnology Electronics Wireless power transfer Nanoelectromechanical systems Multidisciplinary business.industry Electrical engineering Specific absorption rate Sense (electronics) General Chemistry Equipment Design Electrical and electronic engineering Sensors and biosensors Magnetic field Electrodes Implanted Rats Magnetic Fields Smart Materials Models Animal Multi-band device Antenna (radio) business Wireless Technology Voltage |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Ultra-compact wireless implantable medical devices are in great demand for healthcare applications, in particular for neural recording and stimulation. Current implantable technologies based on miniaturized micro-coils suffer from low wireless power transfer efficiency (PTE) and are not always compliant with the specific absorption rate imposed by the Federal Communications Commission. Moreover, current implantable devices are reliant on differential recording of voltage or current across space and require direct contact between electrode and tissue. Here, we show an ultra-compact dual-band smart nanoelectromechanical systems magnetoelectric (ME) antenna with a size of 250 × 174 µm2 that can efficiently perform wireless energy harvesting and sense ultra-small magnetic fields. The proposed ME antenna has a wireless PTE 1–2 orders of magnitude higher than any other reported miniaturized micro-coil, allowing the wireless IMDs to be compliant with the SAR limit. Furthermore, the antenna’s magnetic field detectivity of 300–500 pT allows the IMDs to record neural magnetic fields. Wireless implantable medical devices (IMDs) are hamstrung by both size and efficiency required for wireless power transfer. Here, Zaeimbashi et al. present a magnetoelectric nano-electromechanical systems that can harvest energy and sense weak magnetic fields like those arising from neural activity. |
| Databáze: | OpenAIRE |
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