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Peptide self‐assembly as a strategy for facile immobilization of redox enzymes on carbon electrodes

Carbon Energy 2023年第11期5卷 15-30页

作者： Itzhak Grinberg Oren Ben‐Zvi Lihi Adler‐Abramovich iftach yacoby Department of Oral Biology The Goldschleger School of Dental MedicineFaculty of MedicineTel Aviv UniversityTel AvivIsrael The Center for Nanoscience and Nanotechnology Tel Aviv UniversityTel AvivIsrael The Center for the Physics and Chemistry of Living Systems Tel Aviv UniversityTel AvivIsrael School of Plant Sciences and Food Security The George S.Wise Faculty of Life SciencesTel Aviv UniversityTel AvivIsrael

Redox-enzyme‐mediated electrochemical processes such as hydrogen production,nitrogen fixation,and CO_(2) reduction are at the forefront of the green chemistry *** scale up,the inefficient two‐dimensional(2D)immobilization of redox enzymes on working electrodes must be replaced by an efficient dense 3D *** of 3D electrodes was demonstrated by embedding enzymes in polymer ***,several requirements,such as simple immobilization,prolonged stability,and resistance to enzyme leakage,still need to be *** study presented here aims to overcome these gaps by immobilizing enzymes in a supramolecular hydrogel formed by the self‐assembly of the peptide hydrogelator *** the self‐assembly process avoids the need for tedious and potentially harmful chemistry,allowing the rapid loading of enzymes on a 3D electrode under mild *** the[FeFe]hydrogenase enzyme,high enzyme loads,prolonged resistance against electrophoresis,and highly efficient hydrogen production are ***,this enzyme retention is shown to arise from its interaction with the peptide ***,this method is successfully used to retain other redox enzymes,paving the way for a variety of enzyme‐mediated electrochemical applications.

关键词： 3D electrode enzymes encapsulation H2 production hydrogenase peptide hydrogel

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The development of microfabricated solenoids with magnetic cores for micromagnetic neural stimulation

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Microsystems & Nanoengineering 2021年第6期7卷 97-106页

作者： Adam Khalifa Mohsen Zaeimbashi Tony X.Zhou Seyed Mahdi Abrishami Neville Sun Seunghyun Park TamaraŠumarac Jason Qu Inbar Zohar Amir yacoby Sydney Cash Nian X.Sun Department of Neurology Massachusetts General HospitalHarvard Medical SchoolBostonMAUSA Department of Electrical and Computer Engineering Northeastern UniversityBostonMAUSA Research Laboratory of Electronics Massachusetts Institute of TechnologyCambridgeMAUSA Department of Physics Harvard UniversityCambridgeMAUSA Department of Chemical and Biological Physics Weizmann Institute of ScienceRehovotIsrael

Electrical stimulation via invasive microelectrodes is commonly used to treat a wide range of neurological and psychiatric *** its remarkable success,the stimulation performance is not sustainable since the electrodes become encapsulated by gliosis due to foreign body *** stimulation overcomes these limitations by eliminating the need for a metal-electrode ***,we demonstrate a novel microfabricated solenoid inductor(80µm×40µm)with a magnetic core that can activate neuronal *** characterization and proof-of-concept of the device raise the possibility that micromagnetic stimulation solenoids that are small enough to be implanted within the brain may prove to be an effective alternative to existing electrode-based stimulation devices for chronic neural interfacing applications.

关键词： magnetic neural overcome

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