A5005891623- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Radio Frequency Integrated Circuit Design
- Analytical Chemistry and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Advanced Power Amplifier Design
- Analog and Mixed-Signal Circuit Design
- Perovskite Materials and Applications
- Advanced Memory and Neural Computing
- Ionic liquids properties and applications
- Fuel Cells and Related Materials
- Microwave Engineering and Waveguides
- Building Energy and Comfort Optimization
- Advanced MIMO Systems Optimization
- Sensor Technology and Measurement Systems
- Wireless Communication Networks Research
- Environmental Education and Sustainability
- Antenna Design and Analysis
- RFID technology advancements
- Advanced Wireless Communication Techniques
- Advancements in Semiconductor Devices and Circuit Design
- Electric Motor Design and Analysis
- Organic Light-Emitting Diodes Research
- Indoor and Outdoor Localization Technologies
- Wireless Body Area Networks
Brunel University of London
2020-2025
Suzhou Institute of Nano-tech and Nano-bionics
2024
Northwestern University
2020-2024
University of Konstanz
2022-2024
Northwestern University
2024
Chinese Academy of Sciences
2024
Zhejiang University
2020
Birmingham City University
2018-2019
University of Greenwich
2008-2018
Oxford Brookes University
2004
Abstract Associative learning, a critical learning principle to improve an individual’s adaptability, has been emulated by few organic electrochemical devices. However, complicated bias schemes, high write voltages, as well process irreversibility hinder the further development of associative circuits. Here, adopting poly(3,4-ethylenedioxythiophene):tosylate/Polytetrahydrofuran composite active channel, we present non-volatile transistor that shows less than 0.8 V and retention time longer...
Abstract Organic electrochemical transistors (OECTs) are the building blocks of biosensors, neuromorphic devices, and complementary circuits. One rule in materials design for OECTs is inclusion a hydrophilic component chemical structure to enable ion transport film. Here, it shown that ladder‐type, side‐chain free polymer poly(benzimidazobenzophenanthroline) (BBL) performs significantly better than donor–acceptor type copolymer bearing ethylene glycol side chains (P‐90). A combination...
A series of fully fused n-type mixed conduction lactam polymers p(g7NCnN), systematically increasing the alkyl side chain content, are synthesized via an inexpensive, nontoxic, precious-metal-free aldol polycondensation. Employing these as channel materials in organic electrochemical transistors (OECTs) affords state-of-the-art performance with p(g7NC10N) recording OECT electron mobility 1.20 × 10-2 cm2 V-1 s-1 and a μC* figure merit 1.83 F cm-1 s-1. In parallel to high performance, upon...
Abstract N‐type conjugated polymers as the semiconducting component of organic electrochemical transistors (OECTs) are still undeveloped with respect to their p‐type counterparts. Herein, we report two rigid n‐type bearing oligo(ethylene glycol) (OEG) side chains, PgNaN and PgNgN, which demonstrated an essentially torsion‐free π‐conjugated backbone. The planarity electron‐deficient structures enable resulting achieve high electron mobility in OECT device up 10 −3 cm 2 V −1 s range, a...
Abstract Conjugated polymers with mixed ionic and electronic transport are essential for developing the complexity function of electrochemical devices. Current n‐type materials have a narrow scope low performance compared their p‐type counterparts, requiring new molecular design strategies. This work presents two naphthalene diimide‐bithiophene (NDI‐T2) copolymers functionalized hybrid alkyl‐glycol side chains, where diimide unit is segregated from ethylene glycol (EG) units within chain by...
The structure and packing of organic mixed ionic-electronic conductors have an especially significant effect on transport properties. In operating devices, this is not fixed but responsive to changes in electrochemical potential, ion intercalation, solvent swelling. Toward end, the steady-state transient model conductor, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), characterized using multimodal time-resolved operando techniques. Steady-state X-ray scattering reveals a...
The commercially available polyelectrolyte complex poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is ubiquitous in organic and hybrid electronics. As such, it has often been used as a benchmark material for fundamental studies the development of new electronic devices. Yet, most on PEDOT:PSS have focused its conductivity dry environments, with less consideration given to ion transport, coupled ionic-electronic charge storage properties aqueous environments. These are...
Abstract Operational stability is essential for the success of organic electrochemical transistors (OECTs) in bioelectronics. The oxygen reduction reaction (ORR) a common side that can compromise OECTs, but relationship between ORR and materials degradation poorly understood. In this study, impact on mechanisms thiophene‐based OECTs investigated. findings show an increase pH during leads to polymer backbone. By using protective glue layer semiconductor channel aqueous electrolyte,...
Introduction Scalp electroencephalography (EEG) is commonly used to assist in epilepsy detection. Even automated detection algorithms are already available clinicians reviewing EEG data, many for seizure fail account the contributions of different channels. The Fully Convolutional Network (FCN) can provide model’s interpretability but has not been applied Methods To address these challenges, a novel convolutional neural network (CNN) model, combining SE (Squeeze-and-Excitation) modules, was...
Developing material design guidelines for organic mixed ionic–electronic conductors (OMIECs) is critical to enable high efficacy transport within bioelectronics. One important feature which has yet be thoroughly explored the role of molecular weight on OMIEC performance. In this work, we examined a series prototypical glycolated polythiophene materials (P3MEEET) with systematically increasing weights electrochemical transistors (OECTs)─a common testbed investigating transport. We find that...
Heteroatom substitution is a powerful tool to tune the intra- and intermolecular structure of conjugated polymers as well their resulting optoelectronic electrochemical properties. A series oligoethylene glycol bithiophene chalcogenophene (p(g3T2-X)) with systematically varied furan, thiophene, selenophene, tellurophene comonomers have been synthesized for mixed ionic-electronic conducting applications. Their microstructures thoroughly characterized ex situ in X-ray scattering, properties...
We investigate in detail the optical, electrochemical, structural and electrical properties of polythiophenes with increasing content polar side chains.
Achieving high stability is critical for the implementation of organic electrochemical transistors (OECTs) in more diverse and demanding applications. However, sources mechanisms OECT degradation have not been rigorously explored. Here, we employ a variety biasing schemes to separate relative effects oxidative bias stress, reductive current stress on thiophene-based, p-type OECTs. We find that accelerated arises from compounding simultaneous common across several thiophene-based channel...
Ion transport in organic mixed ionic-electronic conductors (OMIECs) is crucial due to its direct impact on device response time and operating mechanisms but often assessed indirectly or necessitates extra assumptions. Operando x-ray fluorescence (XRF) a powerful, probe for elemental characterization of bulk OMIECs was used directly quantify ion composition mobility model OMIEC, poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS), during operation. The first cycle revealed...
Abstract N‐type conjugated polymers as the semiconducting component of organic electrochemical transistors (OECTs) are still undeveloped with respect to their p‐type counterparts. Herein, we report two rigid n‐type bearing oligo(ethylene glycol) (OEG) side chains, PgNaN and PgNgN, which demonstrated an essentially torsion‐free π‐conjugated backbone. The planarity electron‐deficient structures enable resulting achieve high electron mobility in OECT device up 10 −3 cm 2 V −1 s range, a...
Electroactive polymer thin films undergo repeated reversible structural change during operation in electrochemical applications. While synchrotron X-ray scattering is powerful for the characterization of stand-alone and ex situ organic films, situ/operando has been underutilized-in large part due to complications arising from supporting electrolyte scattering. This greatly hampered development application relevant structure property relationships. Therefore, a new methodology that separates...
Understanding the mass uptake, morphological changes, and charge transport in organic mixed ionic–electronic conductors (OMIECs) during device operation is crucial for applications energy, actuators, bioelectronics. In this work, we quantify chemical composition rheological properties of a model OMIEC material, acid-treated poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT/PSS), electrochemical cycling using quartz crystal microbalance (EQCM) elemental analysis techniques. We...
Mobility limitations due to congenital disabilities, accidents, or illnesses pose significant challenges the daily lives of individuals with disabilities. This study presents a novel design for multifunctional intelligent vehicle, integrating head recognition, eye-tracking, Bluetooth control, and ultrasonic obstacle avoidance offer an innovative mobility solution. The smart vehicle supports three driving modes: (1) nostril-based control system using MediaPipe track displacement movement...
Polythiophenes bearing glycolated side chains have rapidly surged as the highest performing materials for organic electrochemical transistors (OECTs) because of their ability to conjugate volumetric ion penetration with high hole mobility and charge density. Among them, p(g2T-TT) has one figures merit. Our work provides an atomistic picture p(g2T-TT)–electrolyte interface in “off” state OECT, expected be dominated by cation–polymer interactions. Using a combination molecular dynamics...
The field of bioelectronics leverages the optoelectronic properties synthetic materials to interface with living systems. These applications require that are conductive, aqueous-processible, biocompatible, and can be chemically modified for biofunctionalization. While conjugated polymers polyelectrolytes have been reported demonstrate several these features, offer each simultaneously rare. Here, we develop copolymers anionic polyelectrolyte poly(4-(2,3-dihydrothieno...
Understanding the ionic composition and distribution in organic mixed ionic-electronic conductors (OMIECs) is crucial for understanding their structure-property relationships. Despite this, direct measurements of OMIEC are not common. In this work, we investigated mesoscopic structure three typical p-type materials: an ethylene glycol-treated crosslinked with a large excess fixed anionic charge (EG/GOPS-PEDOT:PSS), acid-treated tunable (crys-PEDOT:PSS), single-component without any...
Non-ionic polar side chains are leveraged in the molecular design of conjugated polymers to create stable surfactant-free polymer nanoparticle dispersions. An organic electronic device is prepared by processing nanoparticles directly from water.