Electronic and Optically controlled Bi-functional Transistor based on Bio-Nano Hybrid Complex

Vikram Bakaraju; Senthil Prasad; Brijesh Meena; Harsh Chaturvedi

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arXiv · 1910.06254

Electronic and Optically controlled Bi-functional Transistor based on Bio-Nano Hybrid Complex

Vikram Bakaraju·Senthil Prasad·Brijesh Meena·Harsh Chaturvedi

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Abstract

We report optically as well as electronically controlled, bio-electronic field-effect transistor (FET) based on the hybrid film of a photo-active purple membrane and electronically conducting single-walled carbon nanotubes (SWNTs). Two dimensional (2D) crystal of bacteriorhodopsin forms the photoactive center of the bio-nano complex, whereas one dimensional (1D) pure SWNTs provides the required electronic support. The hybrid structure shows a conductivity of 19 microS/m and semiconducting characteristics due to preferential binding with selective diameters of semiconducting SWNTs only. The bio-electronic transistor fabricated using direct laser lithography shows photoconductivity of 13.15 microS/m and well-controlled optical and electronic gating with a significant On/Off switch ratio of 8.5. The device demonstrates well-synchronized electronic and optical gating wherein, n-type FET shows complementary p-type characteristics due to optically controlled proton-pumping by bacteriorhodopsin. Fabricated bio-electronic transistor displays both electronically and optically well-controlled, bi-functionality.

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Vikram Bakaraju, Senthil Prasad, Brijesh Meena, Harsh Chaturvedi. 2019-10-11. Electronic and Optically controlled Bi-functional Transistor based on Bio-Nano Hybrid Complex. https://arxiv.org/abs/1910.06254

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