An Electronic and Optically Controlled Bifunctional Transistor Based on a Bio–Nano Hybrid Complex
| Autor: | E. Senthil Prasad, Harsh Chaturvedi, Brijesh Meena, Vikram Bakaraju |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | ACS Omega, Vol 5, Iss 17, Pp 9702-9706 (2020) ACS Omega |
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.9b03904 |
| Popis: | We report an electronically and optically controlled bioelectronic field-effect transistor (FET) based on the hybrid film of photoactive bacteriorhodopsin and electronically conducting single-walled carbon nanotubes (SWNTs). Two-dimensional (2D) crystals of bacteriorhodopsin form the photoactive center of the bio-nano complex, whereas one-dimensional (1D) pure SWNTs provide the required electronic support. The redshift in the Raman spectra indicates the electronic doping with an estimated charge density of 3 X 10(6) cm(-2). The hybrid structure shows a conductivity of 19 mu S/m and semiconducting characteristics due to preferential binding with selective diameters of semiconducting SWNTs. The bioelectronic transistor fabricated using direct laser lithography shows both optical and electronic gating with a significant on/off switch ratio of 8.5 and a photoconductivity of 13.15 mu S/m. An n-type FET shows complementary p- type characteristics under light due to optically controlled, electronic doping by the "proton-pumping" bacteriorhodopsin. The fabricated bioelectronic transistor exhibits both electronically and optically well-controlled bifunctionality based on the functionalized hybrid electronic material. |
| Databáze: | OpenAIRE |
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