Here we report the first demonstration of a biopolymer protonic field-effect transistor with proton-transparent PdH(x) contacts. In maleic-chitosan nanofibres, the. ARTICLE Received 13 Apr | Accepted 22 Aug | Published 20 Sep DOI: /ncomms A polysaccharide bioprotonic field-effect. Prof. Rolandi is presenting a talk “Complementary Polysaccharide Bioprotonic Field Effect Transistors” at the Symposium UU of Spring MRS!.

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In contrast, the development of computing has mainly focused on devices that control electronic currents such as vacuum tubes, solid-state fieldeffect transistors FETand nanoscale molecular structures8— Synthesis, characterization and cytotoxicity of photocrosslinked maleic chitosan-polyethylene glycol diacrylate hybrid hydrogels.

In living systems, electrical signals are communicated and processed by modulating ionic6 and protonic currents7. From these plots, it is clear that, for a negative Vgs, the proton density is drastically increased at the polysaccharide—dielectric interface to form a highly conducting region. This allows for current control in highly concentrated electrolytes at any length scale. Bioelectronic silicon nanowire devices using functional membrane proteins.

By clicking “OK” you acknowledge that you have the right to distribute this file. The maleic—chitosan hydration level was determined with a thermogravimetric analyser TA Instruments, model From these plots, it is also clear fieeld-effect in significantly thinner devices the expected charge modulation will be higher.

Electrical-conduction in hydrated collagen. RoudsariAdnan KapetanovicM. The service is similar in scope to EndNote or RefWorks or any other reference manager like BibTeX, but it is a social bookmarking service for polhsaccharide and humanities researchers.


Ionic-conduction in keratin wool. A small contact barrier neglected in our model may cause charge accumulation or depletion at the maleic—chitosan PdHx interface. Find this article at Save current location: Anomalous ion transport in 2-nm hydrophilic nanochannels.

Chuanhua DuanArun Majumdar Nature nanotechnology Given that this model involves several rield-effect and approximate estimates of the maleic—chitosan channel volume, this data is in good, even fortuitous, agreement. References Publications referenced by this paper. Theory of hydrogen-bonded chains in bioenergetics. A higher level of water absorption creates more proton-conducting hydrogen-bond chains HBC that serve as proton wires2 for Grotthus type transfer to occur Fig. Palladiumbacterial cellulose membranes for fuel cells.

This paper has been referenced on Twitter 15 times over the past 90 days. Measurements using hydrogen-depleted Pd or Au contacts—both proton blocking—record a considerably smaller current Supplementary Fig. Nanomaterials for neural interfaces. To insert individual citation into a bibliography in a word-processor, select your polysaccharid citation style below and drag-and-drop it into the document. In most materials, protons have to overcome activation energy in the range of 0.

AnantramMarco Rolandi. We also estimate Ids as a function of Vds for different Vgs Fig. There are no reviews of this article. When a bias is applied between the contacts, the current increases with relative humidity and polysaccharide hydration level Fig.

Anomalous ion transport in 2-nm hydrophilic nanochannels.

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However, these require microscopic liquid reservoirs, and current control at physiological concentration is limited to difficult-to-fabricate nanometer channels In maleic—chitosan, we propose that the protons responsible for the current as hydronium ions in the HBC originate from the polysaccharide maleic acid groups, some of which are deprotonated Fig. Nipun MisraJulio A.


A voltage applied to the electrostatic gate controls the maleic—chitosan channel proton density and the channel conductivity. We defined a silicon Si based metal—oxide—semiconductor transistor with the same dimensions as the experiment. Measurements performed on a thicker device show a significantly smaller Ids modulation from Vgs, as predicted by our description Supplementary Fig.

A polysaccharide bioprotonic field-effect transistor.

Register and you can start organising your references online. This procedure eliminates any salt and thus potential salt effects on the conductivity. Artificial devices that can control and monitor ionic and protonic currents are thus an ideal bioprotonci for interfacing with biological systems. Always show this tags box this may affect the page loading speed if checked.

A polysaccharide bioprotonic field-effect transistor ARTICLE Chao Zhong , Yingxin Deng

A facile bottom-up route to self-assembled biogenic chitin nanofibers. In maleic-chitosan nanofibres, the flow of protonic current is turned on or off by an electrostatic potential applied to a gate electrode.

Electrostatic control of ions and molecules in nanofluidic transistors.

A proton-injecting technique for the measurement of hydration-dependent protonic conductivity. Recently, fiel-effect polymer ion bipolar junction transistor devices have been demonstrated25, Toward complementary ionic circuits: A facile bottom-up route to self-assembled biogenic chitin nanofibers.

This study introduces a new class of biocompatible solid-state devices, which can control and monitor the flow of protonic current.

Toward complementary ionic circuits: