Prof. George G. Malliaras Profile

Prof. George G. Malliaras

Professor at Univ of Cambridge

SPIE Involvement:

Conference Program Committee | Conference Chair | Conference Co-Chair | Author | Editor

Publications (24)

PROCEEDINGS ARTICLE | September 19, 2017

Organic neuromorphic devices based on electrochemical concepts (Conference Presentation)

Proc. SPIE. 10366, Hybrid Memory Devices and Printed Circuits 2017

KEYWORDS: Interfaces, Data processing, Microelectronics, Transistors, Liquids, Neurons, Synaptic plasticity

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PROCEEDINGS ARTICLE | November 7, 2016

Conducting polymer scaffolds for electrical control of cellular functions (Conference Presentation)

Proc. SPIE. 9944, Organic Sensors and Bioelectronics IX

KEYWORDS: Switching, Tissues, Polymers, Chemistry, Diagnostics, Mining, Transistors, Network architectures, Smart materials, In vitro testing

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Considering the limited physiological relevance of 2D cell culture experiments, significant effort was devoted to the development of materials that could more accurately recreate the in vivo cellular microenvironment, and support 3D cell cultures in vitro. (1) One such class of materials is conducting polymers, which are promising due to their compliant mechanical properties, compatibility with biological systems, mixed electrical and ionic conductivity, and ability to form porous structures. (2) In this work, we report the fabrication of a single component, macroporous scaffold made from poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) via an ice-templating method. (3) PEDOT:PSS scaffolds offer tunable pore size, morphology and shape through facile changes in preparation conditions, and are capable of supporting 3D cell cultures due to their biocompatibility and tissue-like elasticity. Moreover, these materials are functional: they exhibit excellent electrochemical switching behavior and significantly lower impedance compared to films. Their electrochemical activity enables their use in the active channel of a state of the art diagnostic tool in the field of bioelectronics, i.e., the organic electrochemical transistor (OECT). The inclusion of cells within the porous architecture affects the impedance of the electrically-conducting polymer network and, thus, may be used as a method to quantify cell growth. The adhesion and pro-angiogenic secretions of mouse fibroblasts cultured within the scaffolds can be controlled by switching the electrochemical state of the polymer prior to cell-seeding. In summary, these smart materials hold promise not only as extracellular matrix-mimicking structures for cell culture, but also as high-performance bioelectronic tools for diagnostic and signaling applications. References [1] M. Holzwarth, P. X. Ma, Journal of Materials Chemistry, 21, 10243‐10251 (2011). [2] L. H. Jimison, J. Rivnay, R. M. Owens, in Organic Electronics, Wiley‐VCH Verlag GmbH and Co. KGaA, 27‐6 (2013). [3] A. M.-D. Wan, S. Inal, T. Williams et al. Journal of Materials Chemistry B, DOI: 10.1039/C5TB00390C (2015).

PROCEEDINGS ARTICLE | October 5, 2015

Interfacing with the brain using organic electronics (Presentation Recording)

Proc. SPIE. 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII

KEYWORDS: Electrodes, Pathology, Diagnostics, Mining, Transistors, Brain-machine interfaces, Physiology, Therapeutics, Organic electronics, Brain

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PROCEEDINGS ARTICLE | October 5, 2015

A better understanding of organic electrochemical transistors for biosensing applications (Presentation Recording)

Proc. SPIE. 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII

KEYWORDS: Biosensing, Glucose, Sensors, Video, Physics, Biosensors, Mining, Transistors, Signal detection, Brain

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PROCEEDINGS ARTICLE | August 31, 2015

Fully printed metabolite sensor using organic electrochemical transistor

Proc. SPIE. 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII

KEYWORDS: Fabrication, Biosensing, Glucose, Sensors, Electrodes, Polymers, Interfaces, Platinum, Printing, Transistors

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PROCEEDINGS ARTICLE | September 8, 2011

Electrochemical transistors with ionic liquids for enzymatic sensing

Proc. SPIE. 8118, Organic Semiconductors in Sensors and Bioelectronics IV

KEYWORDS: Biosensing, Glucose, Sensors, Electrodes, Polymers, Ions, Chemistry, Transistors, Sodium, Liquids

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PROCEEDINGS ARTICLE | September 8, 2011

Wearable electrochemical sensors for monitoring performance athletes

Proc. SPIE. 8118, Organic Semiconductors in Sensors and Bioelectronics IV

KEYWORDS: Proteins, Glucose, Sensors, Polymers, Biosensors, Transistors, Sodium, Single sideband modulation, Liquids, Chemical fiber sensors

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PROCEEDINGS ARTICLE | March 30, 2010

Orthogonal lithography for organic electronics

Proc. SPIE. 7639, Advances in Resist Materials and Processing Technology XXVII

KEYWORDS: Lithography, Electron beam lithography, Optical lithography, Organic light emitting diodes, Polymers, Silicon, Organic materials, Photoresist materials, Fluorine, Organic electronics

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PROCEEDINGS ARTICLE | August 21, 2009

Structure vs. property relationships in high mobility fused thiophene polymers

Proc. SPIE. 7417, Organic Field-Effect Transistors VIII

KEYWORDS: Semiconductors, Silica, Scattering, Polymers, Annealing, Molecules, Crystals, Transistors, Field effect transistors, Head-mounted displays

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SPIE Conference Volume | August 20, 2009

Organic Semiconductors in Sensors and Bioelectronics II

SPIE Conference Volume | August 25, 2008

Organic Field-Effect Transistors VII and Organic Semiconductors in Sensors and Bioelectronics

SPIE Conference Volume | September 13, 2007

Organic-based Chemical and Biological Sensors

PROCEEDINGS ARTICLE | February 2, 2001

Hole injection from indium tin oxide into triphenyl diamine

Proc. SPIE. 4105, Organic Light-Emitting Materials and Devices IV

KEYWORDS: Oxides, Data modeling, Interfaces, Indium, Solids, Aluminum, Thin film devices, Organic semiconductors, Telescopic pixel displays, Tin

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PROCEEDINGS ARTICLE | December 17, 1999

Light-emitting diodes based on a liquid-crystalline oxadiazole derivative

Proc. SPIE. 3797, Organic Light-Emitting Materials and Devices III

KEYWORDS: Multilayers, Light emitting diodes, Organic light emitting diodes, Molecules, Crystals, Liquid crystals, Diodes, Crystallography, Information operations, Liquids

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PROCEEDINGS ARTICLE | December 16, 1998

Injection, transport, and recombination in organic light-emitting diodes

Proc. SPIE. 3476, Organic Light-Emitting Materials and Devices II

KEYWORDS: Electrodes, Organic light emitting diodes, Polymers, Electrons, Interfaces, Diffusion, Quantum efficiency, Numerical simulations, Diodes, Excitons

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PROCEEDINGS ARTICLE | November 1, 1996

Preparation of photovoltaic cells from sexithiophene-C60 blends

Proc. SPIE. 2852, Nonlinear Optical Properties of Organic Materials IX

KEYWORDS: Photovoltaics, Polymers, Solar cells, Luminescence, Crystals, Electrons, Diffusion, Transmission electron microscopy, Excitons, Heterojunctions

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PROCEEDINGS ARTICLE | October 15, 1996

Control of charge trapping in a novel photorefractive composite consisting of a bifunctional molecule based on TPD

Proc. SPIE. 2850, Organic Photorefractive Materials and Xerographic Photoreceptors

KEYWORDS: Refractive index, Modulation, Polymers, Molecules, Composites, Electro optics, Photorefractive polymers, Telescopic pixel displays, Phase shifts, Oxidation

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PROCEEDINGS ARTICLE | October 15, 1996

Space-charge field formation in poly(N-vinylcarbazole)-based photorefractive composites

Proc. SPIE. 2850, Organic Photorefractive Materials and Xerographic Photoreceptors

KEYWORDS: Diffraction, Modulation, Polymers, Molecules, Composites, Diffusion, Nonlinear optics, Electro optical modeling, Photorefractive polymers, Phase shifts

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PROCEEDINGS ARTICLE | October 5, 1995

Transient photorefractive gratings in polymers

Proc. SPIE. 2527, Nonlinear Optical Properties of Organic Materials VIII

KEYWORDS: Diffraction, Polymers, Image processing, Molecules, Crystals, Composites, Electro optics, Photorefractive polymers, Temperature metrology, Diffraction gratings

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PROCEEDINGS ARTICLE | August 23, 1995

Charge trapping in photorefractive polymers

Proc. SPIE. 2526, Xerographic Photoreceptors and Photorefractive Polymers

KEYWORDS: Diffraction, Holography, Polymers, Molecules, Composites, Ionization, Electro optics, Photorefractive polymers, Phase shifts, Diffraction gratings

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PROCEEDINGS ARTICLE | August 23, 1995

Photorefractive host-guest systems and fully functionalized polymers

Proc. SPIE. 2526, Xerographic Photoreceptors and Photorefractive Polymers

KEYWORDS: Transparency, Polymers, Glasses, Molecules, Photorefraction, Electro optics, Photorefractive polymers, Telescopic pixel displays, Electro optic polymers, Absorption

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PROCEEDINGS ARTICLE | December 16, 1993

Silicon-based donor-acceptor compounds: synthesis and nonlinear optical characterization

Proc. SPIE. 2025, Nonlinear Optical Properties of Organic Materials VI

KEYWORDS: Visible radiation, Transparency, Chemical species, Polymers, Spectroscopy, Molecules, Crystals, Silicon, Bromine, Absorption

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PROCEEDINGS ARTICLE | December 16, 1993

Color tuning of poly[(silanylene)thiophene] block copolymers

Proc. SPIE. 2025, Nonlinear Optical Properties of Organic Materials VI

KEYWORDS: Thin films, Optical properties, Electrodes, Polymers, Luminescence, Electrons, Indium, Silver, Electroluminescence, Absorption

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PROCEEDINGS ARTICLE | December 16, 1993

Photorefractive polymer materials

Proc. SPIE. 2025, Nonlinear Optical Properties of Organic Materials VI

KEYWORDS: Refractive index, Polyurethane, Polymers, Molecules, Crystals, Photorefraction, Electro optics, Polymer thin films, Photorefractive polymers, Electro optic polymers

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