scholarly journals Sharpened and mechanically durable carbon fiber electrode arrays for neural recording

2021 ◽  
pp. 1-1
Author(s):  
Elissa J. Welle ◽  
Joshua E. Woods ◽  
Ahmad A. Jiman ◽  
Julianna M. Richie ◽  
Elizabeth C. Bottorff ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Neural Recording ◽  
Electrode Arrays ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

scholarly journals A carbon-fiber electrode array for long-term neural recording

2013 ◽  
Vol 10 (4) ◽  
pp. 046016 ◽  
Author(s):  
Grigori Guitchounts ◽  
Jeffrey E Markowitz ◽  
William A Liberti ◽  
Timothy J Gardner
Keyword(s):  
Carbon Fiber ◽  
Electrode Array ◽  
Neural Recording ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

scholarly journals 64-Channel Carbon Fiber Electrode Arrays for Chronic Electrophysiology

2019 ◽  
Author(s):  
Grigori Guitchounts ◽  
David Cox
Keyword(s):  
Carbon Fiber ◽  
Neuronal Activity ◽  
Electrode Array ◽  
Brain Regions ◽  
Electrode Arrays ◽  
Parylene C ◽  
Practical Tool ◽  
Freely Behaving ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

ABSTRACTA chief goal in neuroscience is to understand how neuronal activity relates to behavior, perception, and cognition. However, monitoring neuronal activity over long periods of time is technically challenging, and limited, in part, by the invasive nature of recording tools. While electrodes allow for recording in freely-behaving animals, they tend to be bulky and stiff, causing damage to the tissue they are implanted in. One solution to this invasiveness problem may be probes that are small enough to fly under the immune system’s radar. Carbon fiber (CF) electrodes are thinner and more flexible than typical metal or silicon electrodes, but the arrays described in previous reports had low channel counts and required time-consuming manual assembly. Here we report the design of an expanded-channel-count carbon fiber electrode array (CFEA) as well as a method for fast preparation of the recording sites using acid etching and electroplating with PEDOT-TFB, and demonstrate the ability of the 64-channel CFEA to record from rat visual cortex. We include designs for interfacing the system with micro-drives or flex-PCB cables for recording from multiple brain regions, as well as a facilitated method for coating CFs with the insulator Parylene-C. High-channel-count CFEAs may thus be an alternative to traditional microwire-based electrodes and a practical tool for exploring the neural code.

scholarly journals Insertion of linear 8.4μm diameter 16 channel carbon fiber electrode arrays for single unit recordings

2015 ◽  
Vol 12 (4) ◽  
pp. 046009 ◽  
Author(s):  
Paras R Patel ◽  
Kyounghwan Na ◽  
Huanan Zhang ◽  
Takashi D Y Kozai ◽  
Nicholas A Kotov ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Single Unit ◽  
Electrode Arrays ◽  
Single Unit Recordings ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

scholarly journals Sharpened and mechanically robust carbon fiber electrode arrays for neural interfacing

2021 ◽  
Author(s):  
Elissa J Welle ◽  
Joshua E Woods ◽  
Ahmad A. Jiman ◽  
Julianna M Richie ◽  
Elizabeth C Bottorff ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Vagus Nerve ◽  
Rat Brain ◽  
Carbon Fibers ◽  
Dorsal Root Ganglia ◽  
Dorsal Root ◽  
Neural Recording ◽  
Bladder Pressure ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

AbstractObjectiveBioelectric medicine offers therapeutic diagnoses and treatments for disorders of the nervous system unresponsive to pharmacological treatments. While current neural interfaces effectively treat many disorders with stimulation, recording specificity is often limited to gross averages across many neurons or axons. Here, we develop and describe a novel, robust carbon fiber electrode array adaptable to many neural structures for precise neural recording.ApproachCarbon fibers were sharpened using a blowtorch method made reproducible by using the reflection of fibers against the surface of a water bath. Arrays of carbon fibers were developed by partially embedding carbon fibers in medical-grade silicone to improve robustness to fracture. Acute spontaneous electrophysiology was recorded from the rat cervical vagus nerve, feline dorsal root ganglia, and rat brain. Acute brushing and bladder pressure electrophysiology was recorded from feline dorsal root ganglia as well.Main resultsBlowtorching resulted in fibers of 72.3 ± 33.5 degree tip angle with 146.8 ± 17.7 μm exposed carbon. Silicone-embedded carbon fiber arrays were robust to bending (87.5% of fibers remained unbroken, 50,000 passes). Observable neural clusters were recorded using sharpened carbon fiber electrodes from rat cervical vagus nerve (41.8 μVpp, N=3 electrodes), feline dorsal root ganglia (101.1 μVpp, N=32 electrodes), and rat brain (80.7 μVpp, N=7 electrodes). Recordings from the feline dorsal root ganglia included physiologically-relevant signals from increased bladder pressure and cutaneous brushing.SignificanceThese results suggest that this carbon fiber array is a uniquely robust and adaptable neural recording device, useful for specific electrophysiology measurements. In the future, this device may be useful as a bioelectric medicine tool for diagnosis and closed-loop neural control of therapeutic treatments and monitoring systems.

scholarly journals Benchtop Carbon Fiber Microelectrode Array Fabrication Toolkit

2021 ◽  
Author(s):  
Julianna M. Richie ◽  
Paras R. Patel ◽  
Elissa J. Welle ◽  
Tianshu Dong ◽  
Lei Chen ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Printed Circuit Boards ◽  
Electrode Array ◽  
Fabrication Process ◽  
Uv Laser ◽  
Electrode Arrays ◽  
Carbon Fiber Microelectrode ◽  
Carbon Fiber Electrode ◽  
Array Fabrication ◽  
Fiber Electrode

AbstractBackgroundConventional neural probes are primarily fabricated in a cleanroom, requiring the use of multiple expensive and highly specialized tools.New methodWe propose a cleanroom “light” fabrication process of carbon fiber neural electrode arrays that can be learned quickly by an inexperienced cleanroom user. This carbon fiber electrode array fabrication process requires just one cleanroom tool, a parylene-c deposition machine, that can be learned quickly or outsourced to a commercial processing facility at marginal cost. Our fabrication process also includes hand-populating printed circuit boards, insulation, and tip optimization.ResultsThe three different tip optimizations explored here (Nd:YAG laser, blowtorch, and UV laser) result in a range of tip geometries and 1kHz impedances, with blowtorched fibers resulting in the lowest impedance. While previous experiments have proven laser and blowtorch electrode efficacy, this paper also shows UV laser cut fibers can record neural signals in vivo.Comparison with existing methodsExisting carbon fiber arrays either do not have individuated electrodes in favor of bundles or require cleanroom fabricated guides for population and insulation. The proposed arrays use only tools that can be used at a benchtop for fiber population.ConclusionsThis carbon fiber electrode array fabrication process allows for quick customization of bulk array fabrication at a reduced price compared to commercially available probes.

Synergistic effect of LiF coating and carbon fiber electrode on enhanced electrochemical performance of Li2MnSiO4

2021 ◽  
Vol 373 ◽  
pp. 137911
Author(s):  
S. Krishna Kumar ◽  
Sourav Ghosh ◽  
Madhushri Bhar ◽  
Ajay K. Kavala ◽  
Sivaraman Patchaiyappan ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Synergistic Effect ◽  
Electrochemical Performance ◽  
Carbon Fiber Electrode ◽  
Enhanced Electrochemical Performance ◽  
Fiber Electrode

Electrochemical sensor for nitric oxide using layered films composed of a polycationic dendrimer and nickel(II) phthalocyaninetetrasulfonate deposited on a carbon fiber electrode

2014 ◽  
Vol 182 (5-6) ◽  
pp. 1079-1087 ◽  
Author(s):  
Juliana Cancino ◽  
Sabine Borgmann ◽  
Sergio A. S. Machado ◽  
Valtencir Zucolotto ◽  
Wolfgang Schuhmann ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Carbon Fiber ◽  
Electrochemical Sensor ◽  
Carbon Fiber Electrode ◽  
Fiber Electrode

scholarly journals CoMnO2-Decorated Polyimide-Based Carbon Fiber Electrodes for Wire-Type Asymmetric Supercapacitor Applications

2020 ◽  
Author(s):  
Young-Hun Cho ◽  
Jae-Gyoung Seong ◽  
Jae-Hyun Noh ◽  
Da-Young Kim ◽  
Yong-Sik Chung ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Rate Capability ◽  
Ammonium Persulfate ◽  
Chemical Oxidation ◽  
Sem Analysis ◽  
Metal Nanostructures ◽  
Carbon Fiber Electrode ◽  
Coated Carbon ◽  
Fiber Electrode

In this work, we report the carbon fiber-based wire-type asymmetric supercapacitors (ASCs). The highly conductive carbon fibers were prepared by the carbonized and graphitized process using the polyimide (PI) as a carbon fiber precursor. To assemble the ASC device, the CoMnO2-coated and Fe2O3-coated carbon fibers were used as the cathode and the anode materials, respectively. FE-SEM analysis confirmed that the CoMnO2-coated carbon fiber electrode exhibited the porous hierarchical interconnected nanosheet structures, depending on the added amounts of ammonium persulfate (APS) as an oxidizing agent, and Fe2O3-coated carbon fiber electrode showed a uniform distribution of porous Fe2O3 nanorods over the surface of carbon fibers. The nanostructured CoMnO2 were directly deposited onto carbon fibers by a chemical oxidation route without high temperature treatments. In particular, the electrochemical properties of the CoMnO2-coated carbon fiber with the concentration of 6 mmol APS presented the enhanced electrochemical activity, probably due to its porous morphologies and good conductivity. Further, to reduce the interfacial contact resistance as well as improve the adhesion between transition metal nanostructures and carbon fibers, the carbon fibers were pre-coated with the Ni layer as a seed layer using an electrochemical deposition method. The fabricated ASC device delivered a specific capacitance of 221 F g-1 at 0.7 A g-1 and good rate capability of 34.8% at 4.9 A g-1. Moreover, the wire-type device displayed the superior energy density of 60.16 Wh kg-1 at a power density of 490 W kg-1 and excellent capacitance retention of 95% up to 3,000 charge/discharge cycles.

Sign in / Sign up

Export Citation Format

Share Document