One Pot Photomediated Formation of Electrically Conductive Hydrogels

ACS Polymers Au, Journal Year: 2023, Volume and Issue: 4(1), P. 34 - 44

Published: Dec. 8, 2023

Electrically conductive hydrogels represent an innovative platform for the development of bioelectronic devices. While photolithography technologies have enabled fabrication complex architectures with high resolution, photoprinting is still a challenging task because polymer absorbs light which can outcompete photopolymerization insulating scaffold. In this study, we introduce approach to synthesizing in one step. Our combines simultaneous photo-cross-linking polymeric scaffold and polymerization 3,4-ethylene dioxythiophene (EDOT), without additional photocatalysts. This process involves copolymerization photo-cross-linkable coumarin-containing monomers sodium styrenesulfonate produce water-soluble poly(styrenesulfonate-co-coumarin acrylate) (P(SS-co-CoumAc)) copolymer. findings reveal that optimizing [SS]:[CoumAc] ratio at 100:5 results strain break up 16%. mechanical resilience coupled electronic conductivity 9.2 S m–1 suitable wearable electronics. Furthermore, be photopatterned achieve micrometer-sized structures resolution. The photo-cross-linked are used as electrodes record stable reliable surface electromyography (sEMG) signals. These novel polymers combined one-pot PEDOT (poly-EDOT) open possibilities rapidly prototyping devices creating custom-designed interfaces between electronics biological systems.

Language: Английский

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Small signal analysis for the characterization of organic electrochemical transistors

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 1, 2024

Abstract A method for the characterization of organic electrochemical transistors (OECTs) based on small signal analysis is presented that allows to determine electronic mobility as a function continuous gate potential using standard two-channel AC potentiostat. Vector in frequency domain exclude parasitic components both ionic and conduction regardless film thickness, thus resulting deviation low 4%. Besides mobility, OECTs also provides information about wide range other parameters including conductance, transconductance, conductivity volumetric capacitance through single measurement. General applicability demonstrated by characterizing devices n-type, p-type, ambipolar materials operating accumulation or depletion modes. Accurate benchmarking mixed ionic-electronic conductors can be anticipated guide development design bioelectronic devices.

Language: Английский

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Integrated Temperature–Humidity Sensors for a Pouch-Type Battery Using 100% Printing Process

Sensors, Journal Year: 2023, Volume and Issue: 24(1), P. 104 - 104

Published: Dec. 25, 2023

The performance, stability, and lifespan of lithium-ion batteries are influenced by variations in the flow lithium ions with temperature. In electric vehicles, coolants generally used to maintain optimal temperature battery, leading an increasing demand for humidity sensors that can prevent leakage short circuits. this study, were fabricated on a pouch film pouch-type battery. IDE electrodes screen-printed humidity- temperature-sensing materials printed using dispenser process. Changes capacitance Ag-CNF sensing, while changes resistance PEDOT:PSS sensing. two integrated into single electrode performance evaluation. sensor exhibited response ΔR ≈ 0.14 from 20 °C 100 20% RH as reference, ΔC 2.8 relative 80% at °C. is expected contribute efficient monitoring applications various batteries.

Language: Английский

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Imidazolium-Based Sulfonating Agent to Control the Degree of Sulfonation of Aromatic Polymers and Enable Plastics-to-Electronics Upgrading

JACS Au, Journal Year: 2024, Volume and Issue: 4(7), P. 2596 - 2605

Published: July 3, 2024

The accumulation of plastic waste in the environment is a growing environmental, economic, and societal challenge. Plastic upgrading, conversion low-value polymers to high-value materials, could address this Among upgrading strategies, sulfonation aromatic powerful approach access materials for range applications, such as ion-exchange resins membranes, electronic pharmaceuticals. While many methods have been reported, achieving high degrees while minimizing side reactions that lead defects polymer chains remains challenging. Additionally, sulfonating agents are most often used large excess, which prevents precise control over degree their functionality. Herein, we these challenges using 1,3-disulfonic acid imidazolium chloride ([Dsim]Cl), sulfonic acid-based ionic liquid, sulfonate upgrade materials. We show stoichiometric [Dsim]Cl can effectively model polystyrene up 92% yields, with minimal regioselectivity

Language: Английский

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Multistep Fabrication of OECTs via Direct Ink Writing, With Performance Analysis Based on a Novel Measurement Protocol

Advanced Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Organic electrochemical transistors (OECTs) have been proven beneficial for bioelectronic applications. However, the demand reliable and fast fabrication methods has not yet fully met. In this work, OECTs are fabricated using direct ink writing (DIW). This method is cleanroom‐free can be done without lithography techniques. These devices characterized benchmarked against spin‐coating drop‐casting deposition approaches. Response time as well product of carrier charge mobility volumetric capacitance found to higher DIW approach compared standard addition, a testing process designed systematically evaluate operational degradation semiconductor channel. test enables identical conditions all tested while providing comparable output. Thicker channels show better stability, thinner proved transistors. Finally, issues instability these discussed.

Language: Английский

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Defect Regulation of Low‐Temperature‐Processed CsPbI₂Br Solar Cells Based on Silane Additives

Solar RRL, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

The development of inverted all‐inorganic perovskite solar cells (PSCs) is limited by the defect‐induced nonradiative recombination. Herein, a strategy to enhance efficiency and stability p‐i‐n type CsPbI 2 Br introducing (3‐glycidyloxypropyl)trimethoxysilane (GOPTS) into precursor solution reported. incorporation GOPTS significantly reduces voids grain boundaries in films fabricated at low temperatures (150 °C). alkoxy, epoxy, ether groups effectively passivate uncoordinated Pb, diminishing recombination centers associated with defects. Density functional theory simulations suggest that increases vacancy formation energies Cs I, leading reduced Furthermore, mitigates photoinduced phase segregation further enhances performance PSCs. This modification results an increase power conversion cells, from 11.83% 13.32%, when self‐assembled monolayers are used as hole transport layer. study underscores potential silane‐based additives defect passivation for perovskites, providing viable route advancement high‐efficiency cells.

Language: Английский

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Reducing delamination of an electron-transporting polymer from a metal oxide for electrochemical applications

Chemical Communications, Journal Year: 2023, Volume and Issue: 60(8), P. 988 - 991

Published: Dec. 20, 2023

Delamination of the electron-transporting polymer N2200 from indium tin oxide (ITO) in aqueous electrolytes is mitigated by modifying ITO with an azide-functionalized phosphonic acid (PA) which, upon UV irradiation, reacts polymer. The optical, electrochemical, and spectroelectrochemical properties thin films are retained non-aqueous media.

Language: Английский

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