Graphene quantum dots interfaced with single bacterial spore for bio-electromechanical devices: a graphene cytobot

Scientific Reports
T S SreeprasadVikas Berry

Abstract

The nanoarchitecture and micromachinery of a cell can be leveraged to fabricate sophisticated cell-driven devices. This requires a coherent strategy to derive cell's mechanistic abilities, microconstruct, and chemical-texture towards such microtechnologies. For example, a microorganism's hydrophobic membrane encapsulating hygroscopic constituents allows it to sustainably withhold a high aquatic pressure. Further, it provides a rich surface chemistry available for nano-interfacing and a strong mechanical response to humidity. Here we demonstrate a route to incorporate a complex cellular structure into microelectromechanics by interfacing compatible graphene quantum dots (GQDs) with a highly responsive single spore microstructure. A sensitive and reproducible electron-tunneling width modulation of 1.63 nm within a network of GQDs chemically-secured on a spore was achieved via sporal hydraulics with a driving force of 299.75 Torrs (21.7% water at GQD junctions). The electron-transport activation energy and the Coulomb blockade threshold for the GQD network were 35 meV and 31 meV, respectively; while the inter-GQD capacitance increased by 1.12 folds at maximum hydraulic force. This is the first example of nano/bio interfacing with ...Continue Reading

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Apr 19, 2012·The Journal of Physical Chemistry Letters·Phong Nguyen, Vikas Berry

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Citations

Jul 6, 2017·Chemical Society Reviews·Guoke ZhaoHongwei Zhu
Aug 16, 2017·Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie·Paul L PlenerKatja Becker
Jul 11, 2020·Scientific Reports·Deisy C Carvalho FernandesVikas Berry
Nov 24, 2018·ACS Applied Materials & Interfaces·Bijentimala KeishamAnkit I Mehta

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