Ultrathin, Soft, Bioresorbable Organic Electrochemical Transistors for Transient Spatiotemporal Mapping of Brain Activity (Adv. Sci. 14/2023)

Abstract

Organic Electrochemical Transistors This cover demonstrates a bio‐tissue compatible and biodegradable electronics neural interface for efficient monitoring and recording of brain activities. The neural interface features with the formats of ultra‐thin, soft, and conformal mounting on brain, which allows high‐fidelity recording ability. Besides, the biodegradable property appears in the cover as these scattered points around the device, referring to the tiny fragments of the device, as well as the water and carbon dioxide produced during degradation. This biodegradable electronics‐based neural interface suggests an intuitive, facile and efficient methods to a broad audience of researchers in the fields of materials science, microfabrication engineering, mechanical engineering, biomedical engineering, etc. More details can be found in article number 2300504 by Enming Song, Junsheng Yu, Xinge Yu, and co‐workers.

Biofluid‐Activated Biofuel Cells, Batteries, and Supercapacitors: A Comprehensive Review

“…Mg oxidation reaction occurred at the anode while oxygen was reduced at the graphene-based cathode. Anode half-cell re-action was described by Equation ( 11) and the several cathodic pathways were described by Equations ( 13)- (15).…”

“…Tissue-integrated devices are an important class of biomedical instruments that aid in optimizing performance of the human body. [1][2][3][4][5][6][7][8] These devices include wearable and implantable biochemical and biophysical sensors, [9][10][11][12][13][14][15][16] drug delivery platforms, [17][18][19] and organ function optimizing devices, such as pacemakers [20,21] and implantable cardiac defibrillators. [22][23][24] DOI: 10.1002/adma.202303197 Tissue-integrated sensors enable close monitoring of various metabolic, electrolytic, proteomic, electrical, kinematic, thermal, and vascular dynamics parameters which provide unprecedented insights into the biological processes occurring within the body.…”

Healthcare Monitoring Sensors Based on Organic Transistors: Surface/Interface Strategy and Performance

“…These approaches can be extended to the detection of other electrophysiological signals, enabling the development of high‐performance and stable bioelectronics. [ 33,275,278,282,286–290 ]…”

High‐Performance Organic Electrochemical Transistors Achieved by Optimizing Structural and Energetic Ordering of Diketopyrrolopyrrole‐Based Polymers

“…Organic electrochemical transistors (OECTs) have drawn great attention as biocompatible electronics due to their diverse DOI: 10.1002/adma.202307402 applications such as transduction/amplification of ionic-electronic signals and the detection of ions and molecules. [1][2][3][4] The operation principles of OECTs involve ion injection into the active channel by the gate bias and the electrochemical doping of the active channel by electrolyte ions for charge compensation. [5][6][7][8][9][10][11] To this end, active semiconductors in OECTs need to ensure both ion and electron transport capabilities, and these materials are classified as organic mixed ionic-electronic conductors (OMIECs).…”