Article
Chemistry, Multidisciplinary
A. Khatun, A. Yadav, S. Zhang, S. Saha
Summary: By in-situ oxidative polymerization of preloaded redox-active monomers, the intrinsically insulating MOF has been transformed into electrically conducting MOF superset of conducting-polymer composites, which could be potentially applied in various porous MOFs to achieve engineered conductivity properties.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Eva Safarikova, Jiri Ehlich, Stanislav Stritesky, Martin Vala, Martin Weiter, Jiri Pachernik, Lukas Kubala, Jan Vitecek
Summary: Organic semiconductors have great potential in regenerative medicine due to their ability to control stem cell differentiation. A study found that the conductive polymer PEDOT:PSS platform is beneficial for the differentiation of mouse embryonic stem cells and can generate higher electrical current.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Quentin Weinbach, Naoures Hmili, Emma Gottis, Guillaume Fleith, Jerome Combet, Vasiliki Papaefthimiou, Vincent Malesys, Emmanuel Denys, Laurent Simon, Marc Schmutz, Alain Carvalho, Doru Constantin, Laure Biniek
Summary: This study investigated the self-assembly mechanism of PEDOT:PSS in dispersion, gel, and dried states using X-ray scattering, cryo-electron microscopy, and X-ray photoelectron spectroscopy techniques. Unique fibrils were found to form a 3D fibrillar network upon acidification of the dispersion, and the growth of ice crystals transformed the structure into a honeycomb-like material. By controlling the freezing rate and direction, anisotropic porous samples with tunable channel size were produced. The effects of porosity on electrical and thermal transport properties were studied at the macroscale, revealing a highly porous cryogel with low thermal conductivity and apparent electrical conductivity. Preliminary measurements at the mesoscale showed anisotropy of charge transport.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Physics, Condensed Matter
Ze Liao, Anjun Qu, Luxi Yuan, Maohua Gong, Lian Wang, Chunlian Hu, Zhengren Zhang
Summary: This paper proposes an electrically switchable anapole dielectric metasurface, which can achieve rapid dynamic switching of the anapole state and control far-field radiation and near-field enhancement. This is of great importance for potential applications of active micro-/nano-photonic devices like light modulators.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Zhenying Xu, Jingyao Song, Bingrui Liu, Shaoping Lv, Fengxian Gao, Xiliang Luo, Peipei Wang
Summary: The wearable microfluidic-based electrochemical sensor incorporating conducting polymer PEDOT:PSS hydrogel provides an accurate and sensitive detection of uric acid (UA) in human sweat. It shows ultrahigh sensitivity and low limit of detection, allowing real-time monitoring of UA levels in human sweat samples with high correlation to ELISA results.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Inorganic & Nuclear
N. Abhishek, Arunima Verma, Anita Singh, Vandana, Tanuj Kumar
Summary: The combination of conducting polymers with metal nanoparticles, especially noble metal nanoparticles, has significance in electrochemical sensing applications. By introducing metal nanoparticles into conducting polymers, the sensitivity, response times, and stability of electrochemical sensors can be improved. The combination of conductive polymers and metal nanoparticles in the form of thin films or nanowires shows efficiency in chemical and biological sensing of various analytes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Ichiro Imae, Haruka Yamane, Keiichi Imato, Yousuke Ooyama
Summary: A simple method was developed to fabricate a composite film of PEDOT:PSS and SWCNTs with high thermoelectric performance, where the carrier density was controlled using an electrochemical method. The electrical conductivities of the composite films were influenced by the carrier species of PEDOT:PSS, while the Seebeck effect exhibited a unique behavior in response to variations in carrier density.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Biomedical
Mahima Bansal, Brad Raos, Zaid Aqrawe, Zimei Wu, Darren Svirskis
Summary: Recent advancements in drug delivery have enabled the specific release of bioactive agents from neural implants to local tissues. A stable conducting polymer hydrogel (CPH) composed of GelMA and PPy was developed for electrically controlled delivery of glutamate. The CPH showed significantly higher Glu release compared to conventional PPy/Glu films, making it suitable for implantable drug delivery applications.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Analytical
Soroush Shahnia, Heike Ebendorff-Heidepriem, Drew Evans, Shahraam Afshar
Summary: This study developed a new platform for nitrate sensing using a PEDOT-coated fiber optic, demonstrating a linear response and detection limit for nitrate ion uptake. The platform showed optical behavior changes in the PEDOT layer through chemical oxidation and reduction processes.
Article
Engineering, Aerospace
Bradley Gobin, Nicholas Harvey, Charles Arnold, Sean Whalen, Gregory Young
Summary: An experimental study was conducted on electrically controlled gel monopropellants, and it was found that the formation of complexes between ionically conductive polymers and ionic salts allows for accelerated ion flow when voltage is applied, affecting the ignition delay and consumption rate.
JOURNAL OF PROPULSION AND POWER
(2022)
Article
Thermodynamics
Bradley Gobin, Nicholas Harvey, Gregory Young
Summary: An experimental study was conducted to investigate the effect of an applied DC voltage on the combustion characteristics of electrically controlled solid propellants. It was found that solid polymer electrolyte propellants readily decompose and ignite upon the application of voltage. The decomposition initiates at the negatively charged cathode and ignition occurs when the liquid decomposition zone contacts the anode. The voltage potential and propellant compositions significantly affect the decomposition rate and morphology.
COMBUSTION AND FLAME
(2022)
Article
Materials Science, Multidisciplinary
Natalia Pereira Menezes, Tommaso Nicolini, Micah Barker, Andre Augusto Mariano, Cesar Augusto Dartora, Guillaume Wantz, Natalie Stingelin, Mamatimin Abbas, Olivier J. Dautel, Damien Thuau
Summary: Organic electrochemical transistors (OECTs) can track biological events with high sensitivity, but stable long-term electrochemical characteristics are needed for practical biosensing applications. This study demonstrates the stability of OECTs using a low swelling mixed conductor, poly[3-(6-hydroxy)hexylthiophene] (P3HHT), soaked in an electrolyte for up to 40 days, and investigates the influence of electrolyte nature on device performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Rafael del Olmo, Tiago C. Mendes, Maria Forsyth, Nerea Casado
Summary: The performance of solid-state lithium metal batteries relies on the interconnection between ions and electrons in the cathode material. A novel approach of using organic mixed ionic-electronic conductors (OMIECs) as binders is presented, which provides excellent electronic and ionic conductivity. This approach significantly improves the discharge capacity and rate capability of solid-state batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Ryota Maeda, Yoshikazu Shinohara, Hiroshi Kawakami, Yukihiro Isoda, Ikuzo Kanazawa, Masaya Mitsuishi
Summary: Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a practical conducting polymer. The formation of a gel-film produces a PEDOT:PSS organogel, which swells to form a hydrogel with a high water-swelling ratio. The gel is comprised of a 3D fibrillar network essential for conduction of electricity and exhibits anisotropic shrinking behavior, providing effective pathways for electricity conduction.
Article
Chemistry, Analytical
Chao Tan, Neetu Kushwah, Xinyan Tracy Cui
Summary: The study demonstrates a platform capable of loading and releasing drugs with different charges using electrically controlled conducting polymer microelectrode coatings. It also shows how focal drug release can be used to study neural circuitry or the impact of nitric oxide on endothelial cells.
Article
Chemistry, Multidisciplinary
Poppy Oldroyd, Johannes Gurke, George G. Malliaras
Summary: This study examines the stability of thin film electrodes and finds that the PEDOT:PSS coating can slow down the corrosion of Au electrodes. Pristine PEDOT:PSS electrodes show the highest stability, which is promising for long-term in vivo neuromodulation applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Correction
Chemistry, Physical
Michael S. Lowry, Jonas I. Goldsmith, Jason D. Slinker, Robert A. Pascal, George G. Malliaras, Stefan Bernhard, Michael S. Lowry
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sagnik Middya, Alejandro Carnicer-Lombarte, Vincenzo F. F. Curto, Sam Hilton, Andreas Genewsky, Alexandra L. L. Rutz, Damiano G. Barone, Gabriele S. Kaminski S. Schierle, Anton Sirota, George G. G. Malliaras
Summary: Traditionally, silicon probes have limitations in studying the brain due to the mechanical mismatch and resulting chronic damage to neural tissue. To overcome this, a flexible neural probe design that imitates the functionality of silicon arrays is presented, offering a tissue-compatible alternative for recording neural activity. The probe is delivered using a detachable 3D printed implanter through hydrophobic-coated shuttles, allowing for minimal movement. Validation experiments demonstrate the feasibility of long-term chronic monitoring of neural ensembles.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Galyna Sych, Patrice Rannou, Maxime Jullien-Palletier, Said Sadki, Yvan Bonnassieux, Sebastien Sanaur
Summary: This study explores low-dimension organic electrochemical transistors (OECTs) and highlights the importance of optimizing micro-fabrication technologies to improve their performance. By decreasing the contact overlap length, the contact resistance can be reduced, leading to faster switching speed and improved circuit design for OECT-based integrated circuits.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Dongxun Lyu, Yanting Jin, Pieter C. M. M. Magusin, Simone Sturniolo, Evan Wenbo Zhao, Shunsuke Yamamoto, Scott T. Keene, George G. Malliaras, Clare P. Grey
Summary: Operando NMR spectroscopy is used to quantify cation and water movement in organic mixed conductors, providing insights into charge-compensating interactions and ionic dynamics. The study sheds light on the working principles of organic mixed conductors and demonstrates the utility of operando NMR spectroscopy in revealing structure-property relationships in electroactive polymers.
Article
Chemistry, Multidisciplinary
Ruben Ruiz-Mateos Serrano, Santiago Velasco-Bosom, Antonio Dominguez-Alfaro, Matias L. Picchio, Daniele Mantione, David Mecerreyes, George G. Malliaras
Summary: Electrocardiography imaging (ECGi) is a non-invasive procedure that uses body surface potential maps (BSPM) obtained from surface electrode measurements to enhance the resolution and interpretation of conventional electrocardiography (ECG) for diagnosing heart problems. ECGi currently lacks precision, but the use of high-density electrode arrays could improve its accuracy. This study proposes a new manufacturing process for flexible substrates that allows the creation of high-density and easily attachable electrode arrays, enabling the development of ECGi devices suitable for clinical applications.
Article
Multidisciplinary Sciences
Amy E. Rochford, Alejandro Carnicer-Lombarte, Malak Kawan, Amy Jin, Sam Hilton, Vincenzo F. Curto, Alexandra L. Rutz, Thomas Moreau, Mark R. N. Kotter, George G. Malliaras, Damiano G. Barone
Summary: The development of neural interfaces with improved biocompatibility and tissue integration is crucial for restoring neurological functions in the nervous system. To increase the resolution for mapping neuronal inputs onto implants, a new type of neural interface using iPSC-derived myocytes as biological targets has been developed. Long-term survival and functional integration of this biohybrid device have been demonstrated in freely moving rats, showing potential for restorative therapies using regenerative bioelectronics.
Article
Chemistry, Physical
Scott T. Keene, Joonatan E. M. Laulainen, Raj Pandya, Maximilian Moser, Christoph Schnedermann, Paul A. Midgley, Iain McCulloch, Akshay Rao, George G. Malliaras
Summary: Simultaneous transport and coupling of ionic and electronic charges is essential for electrochemical devices. However, the dynamic relationship between ionic and electronic transport is poorly understood, hindering material design. In this study, the authors reveal that electrochemical doping speeds in a polythiophene can be limited by poor hole transport, leading to slower switching speeds. Control of microstructural heterogeneity enables improved electrochemical performance.
Review
Chemistry, Multidisciplinary
Jostin Vinroy Dcosta, Daniel Ochoa, Sebastien Sanaur
Summary: Flexible and wearable biosensors are next-generation healthcare devices that can efficiently monitor human health conditions in day-to-day life. This article provides a clear and systematic overview of the latest progress and updates in flexible and wearable all-organic pulse oximetry sensors.
Article
Multidisciplinary Sciences
Scott T. Keene, Akshay Rao, George G. Malliaras
Summary: In this study, in situ measurements of electrochemical (de)doping of an archetypal OMIEC were used to inform a quasi-field drift-diffusion model, accurately capturing experimentally measured ion transport. The research found that the chemical potential of holes represents a major driving force for mixed charge transport. Numerical simulations showed that the competition between hole drift and diffusion leads to diffuse space charge regions in spite of high charge densities, unique to mixed conducting systems.
Article
Chemistry, Multidisciplinary
Yongwoo Lee, Alejandro Carnicer-Lombarte, Sanggil Han, Ben J. Woodington, Seungjin Chai, Anastasios G. Polyravas, Santiago Velasco-Bosom, Eun-Hee Kim, George G. Malliaras, Sungjune Jung
Summary: Flexible transistor-based active neural probes have great potential in advancing the understanding and treatment of neurological diseases. This study presents inkjet-printed organic voltage amplifiers that integrate organic electrochemical transistors and thin-film polymer resistors for in vivo brain activity recording. This innovative approach enables efficient and reliable signal processing for sensory data at sensor endpoints.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jon Lopez de Lacalle, Matias L. Picchio, Antonio Dominguez-Alfaro, Ruben Ruiz-Mateos Serrano, Bastien Marchiori, Isabel del Agua, Naroa Lopez-Larrea, Miryam Criado-Gonzalez, George G. Malliaras, David Mecerreyes
Summary: This study demonstrates the use of hydrophobic eutectogels as water-resistant electrodes, which possess adjustable mechanical properties and excellent stability for recording electromyography (EMG) signals in both underwater and air environments.
ACS MATERIALS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Jostin Vinroy Dcosta, Daniel Ochoa, Sebastien Sanaur
Summary: This work investigates the optoelectrical, mechanical, and material properties of silver nanowires/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) hybrid electrode for ultraflexible organic photodetector applications. The hybrid electrode exhibits low sheet resistance, high optical transmission, and excellent mechanical characteristics. The ultraflexible photodetector fabricated with this hybrid electrode shows comparable performance to standard ITO-based photodetectors.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Amparo Guemes, Antonio Dominguez-Alfaro, Ryo Mizuta, Santiago Velasco-Bosom, Alejandro Carnicer-Lombarte, Damiano G. Barone, David Mecerreyes, George Malliaras
Summary: Tungsten microwires are widely used in neuroscience due to their strength, flexibility, and cost-effectiveness. However, limitations such as high impedance and foreign body reactions hinder their use in electrophysiology. This study presents a novel method for coating tungsten microwires with PEDOT, which improves their electrical characteristics and enhances signal quality.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Patrik Gubeljak, Tianhui Xu, Lorenzo Pedrazzetti, Oliver J. Burton, Luca Magagnin, Stephan Hofmann, George G. Malliaras, Antonio Lombardo
Summary: This paper presents a novel sensor based on graphene coplanar waveguides and microfluidic channels for the identification of non-amplified DNA sequences and single-base mutations. The sensor demonstrates high sensitivity and the ability to generate multidimensional datasets for advanced data analysis, achieving accurate discrimination between different DNA sequences even in the presence of noise and low signal-to-noise ratios.
