Results 61 to 70 of about 7,203 (238)

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source

Bioelectrical Interfaces Beyond Excitable Cells: Cancer, Aging, and Gene Expression Modulation

Advanced Materials Interfaces, EarlyView.
ABSTRACT The investigation of biological conductivity has evolved from its classical foundation based on ionic fluxes underpinning cardiac and neuronal excitability to a multifaceted regulator of cellular physiology. Traditional approaches for probing electrical events in living matter focused largely on action potentials recording.
Paolo Cadinu, Matthew K. Burgess, Catarina Franco Jones, Marzia Iarossi, Manuel Schröter, Nako Nakatsuka, Mustafa B. A. Djamgoz, Gil Gonçalves, Sidahmed Abayzeed, Paola Sanjuán‐Alberte, Paula M. Mendes, Frankie J. Rawson, Malavika Nair, Michael Levin, Rosalia Moreddu   +14 more
wiley   +1 more source

Self-Biasing High Precision CMOS Current Subtractor for Current-Mode Circuits

Advances in Electrical and Computer Engineering, 2013
In this study, a novel, differential pair based, high performance and high bandwidth current subtractor is proposed. Very low equivalent impedances are obtained at input ports n and p by using source follower transistors.
ARSLAN, E.
doaj   +1 more source

Low-distortion low-voltage operational transconductance amplifier [PDF]

Electronics Letters, 2008
A new operational transconductance amplifier (OTA) is proposed, which is based on the flipped voltage follower and source degeneration techniques. The OTA is simulated in a standard TSMC 0.18 μm CMOS process with a 1.8 V supply voltage. The simulation results show that the total harmonic distortion of the proposed OTA is less than 1% up to 0.85 Vp-p.
X. Zhu, Y. Sun
openaire   +1 more source

Design of an output-capacitorless low-dropout regulator for power management applications [PDF]

, 2016
This article aims to present the design of a 4.5-V, 450-mA low drop-out (LDO) voltage linear regulator based on a twostage cascoded operational transconductance amplifier (OTA) as error amplifier.
Martínez García, Herminio
core  

Schottky Barrier Engineering in n‐Type Organic Source‐Gated Transistors Enabling High Conductance

Advanced Materials Technologies, EarlyView.
This study introduces a modified source electrode architecture for n‐type organic source‐gated transistors (OSGTs). By integrating Schottky and Ohmic contact regions, the design achieves a thinner depletion envelope, enhancing mobility nearly tenfold and reducing threshold voltage.
Yonghee Kim, Jae Won Lee, Wonbeen Jeong, Eun Kwang Lee, Jiyoul Lee   +4 more
wiley   +1 more source

A 1-nS 1-V Sub-1-µW Linear CMOS OTA with Rail-to-Rail Input for Hz-Band Sensory Interfaces

Sensors, 2020
The paper presents an operational transconductance amplifier (OTA) with low transconductance (0.62–6.28 nS) and low power consumption (28–270 nW) for the low-frequency analog front-ends in biomedical sensor interfaces.
Jacek Jakusz, Waldemar Jendernalik, Grzegorz Blakiewicz, Miron Kłosowski, Stanisław Szczepański   +4 more
doaj   +1 more source

Operational Transconductance Amplifier-Based Electronically Controllable Memcapacitor and Meminductor Emulators

Journal of Circuits, Systems and Computers, 2021
In this paper, two simple circuits are presented to emulate both memcapacitor and meminductor circuit elements. The emulation of these components has crucial importance since obtaining these high-order elements from markets is difficult when compared to resistor, capacitor and inductor.
Eyyup Demir, Abdullah Yesil, Yunus Babacan, Tevhit Karacali   +3 more
openaire   +4 more sources

Output-capacitorless low-dropout regulator for power management applications [PDF]

, 2019
This article aims to present the design of a 4.5-V, 450-mA low drop-out (LDO) voltage linear regulator based on a two-stage cascoded operational transconductance amplifier (OTA) as error amplifier.
Martínez García, Herminio
core  

Printable Conductive Hydrogels for Electrochemical Biosensing and Soft Bioelectronic Interfaces

Advanced Science, EarlyView.
Flexible, conductive hydrogels that integrate printability, mechanical tunability, biocompatibility, and electronic performance remain challenging to achieve. Here, we develop 3D‐printable poly(ethylene glycol)–poly(pyrrole)‐ hydrogels with tissue‐like mechanics, high cytocompatibility, and robust electrochemical function.
Lukas Hein, Renan Colucci, Xin Wei, Tsvetomir Ivanov, Katharina Landfester, Ulrike Kraft, Maria Villiou   +6 more
wiley   +1 more source