Toward transparent and self-activated graphene harmonic transponder sensors
| Autor: | Mehdi Hajizadegan, Deji Akinwande, Ali Shahini, Haiyu Harry Huang, Pai-Yen Chen, Maryam Sakhdari |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) business.industry Frequency multiplier 010401 analytical chemistry 02 engineering and technology Fundamental frequency 021001 nanoscience & nanotechnology 01 natural sciences Signal Graphene antenna 0104 chemical sciences Harmonic Optoelectronics Antenna (radio) 0210 nano-technology business Frequency modulation Transponder |
| Zdroj: | Applied Physics Letters. 108:173503 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4948254 |
| Popis: | We propose the concept and design of a transparent, flexible, and self-powered wireless sensor comprising a graphene-based sensor/frequency-modulator circuitry and a graphene antenna. In this all-graphene device, the multilayered-graphene antenna receives the fundamental tone at C band and retransmits the frequency-modulated sensed signal (harmonic tone) at X band. The frequency orthogonality between the received/re-transmitted signals may enable high-performance sensing in severe interference/clutter background. Here, a fully passive, quad-ring frequency multiplier is proposed using graphene field-effect transistors, of which the unique ambipolar charge transports render a frequency doubling effect with conversion gain being chemically sensitive to exposed gas/molecular/chemical/infectious agents. This transparent, light-weight, and self-powered system may potentially benefit a number of wireless sensing and diagnosis applications, particularly for smart contact lenses/glasses and microscope slides that ... |
| Databáze: | OpenAIRE |
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