James R. Siegenthaler

ORCID: 0000-0001-5513-4469
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About
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Research Areas
  • Neuroscience and Neural Engineering
  • Electrochemical sensors and biosensors
  • Analytical Chemistry and Sensors
  • Electrochemical Analysis and Applications
  • Neurological disorders and treatments
  • Dendrimers and Hyperbranched Polymers
  • Advanced X-ray and CT Imaging
  • Conducting polymers and applications
  • Bone Tissue Engineering Materials
  • Photoreceptor and optogenetics research
  • Advanced Chemical Sensor Technologies
  • Orthopaedic implants and arthroplasty
  • Nerve injury and regeneration
  • Parkinson's Disease Mechanisms and Treatments
  • SARS-CoV-2 and COVID-19 Research
  • Porphyrin and Phthalocyanine Chemistry
  • Advanced materials and composites
  • Photochemistry and Electron Transfer Studies
  • Photopolymerization techniques and applications
  • Anesthesia and Neurotoxicity Research
  • Aluminum Alloys Composites Properties
  • MXene and MAX Phase Materials
  • Polymer Surface Interaction Studies
  • Surface Roughness and Optical Measurements
  • Ion channel regulation and function

Fraunhofer USA
2021-2025

Michigan State University
2022-2025

University of Arizona
2020-2023

Abstract With the advantages of superior energy density, lithium‐sulfur batteries (LSBs) have been considered as one promising next‐generation batteries. However, some key issues, such shuttle effect intermediate lithium polysulfides, poor conductivity sulfur, Li 2 S and , huge volume variation during charge/discharge process, hindered its development. In this respect, a variety nanomaterials used to overcome above‐mentioned defects. Among them, two‐dimensional (2D) present unique merits for...

10.1002/eom2.12286 article EN cc-by EcoMat 2022-09-26

Abstract Fast‐scan cyclic voltammetry (FSCV) is a popular approach for real‐time neurochemical sensing. Using carbon‐fiber microelectrode (CFME), sensitive sensing can be achieved in the acute setting with sub‐second resolution monoamine neurotransmitters. However, to study neuropsychiatric conditions and neurological functions, it often of interest perform longitudinal monitoring neurotransmitters over chronic timepoints. Despite notable successes, there remains substantial room improvement...

10.1002/admt.202401808 article EN cc-by Advanced Materials Technologies 2025-01-08

Neurotransmitter release is important to study in order better understand neurological diseases and treatment approaches. Serotonin a neurotransmitter known play key roles the etiology of neuropsychiatric disorders. Fast-scan cyclic voltammetry (FSCV) has enabled detection neurochemicals, including serotonin, on sub-second timescale via well-established carbon fiber microelectrode (CFME). However, poor chronic stability biofouling, i.e., adsorption interferent proteins electrode surface upon...

10.3390/bios13060576 article EN cc-by Biosensors 2023-05-25

3D printed biomaterial implants are revolutionizing personalized medicine for tissue repair, especially in orthopedics. In this study, a radiopaque bismuth oxide (Bi

10.1002/adfm.202404860 article EN Advanced Functional Materials 2024-05-17

Abstract Neuromodulation technologies have gained considerable attention for their clinical potential in treating neurological disorders and advancing cognition research. However, traditional methods like electrical stimulation optogenetics face technical biological challenges that limit therapeutic research applications. A promising alternative, photoelectric neurostimulation, uses near‐infrared light to generate pulses thus enables of neuronal activity without genetic alterations. This...

10.1002/adfm.202403164 article EN cc-by-nc Advanced Functional Materials 2024-07-17

Fast-scan cyclic voltammetry (FSCV) is an electrochemical sensing technique that can be used for neurochemical with high spatiotemporal resolution. Carbon fiber microelectrodes (CFMEs) are traditionally as FSCV sensors. However, CFMEs prone to fouling caused by oxidative byproducts of repeated serotonin (5-HT) exposure, which makes them less suitable chronic 5-HT Our team developing a boron-doped diamond microelectrode (BDDME) has previously been shown relatively resistant protein adsorption...

10.3390/bios14070352 article EN cc-by Biosensors 2024-07-19

Abstract Objective Neuromodulation technologies have gained considerable attention for its clinical potential in treating neurological disorders and their capacity to advance cognition research. Nevertheless, traditional neuromodulation methods such as electrical stimulation optogenetics manipulation currently experience technical biological challenges that hinge therapeutic chronic research applications. Recently, a promising alternative approach based on the photoelectric effect has...

10.1101/2024.02.17.580823 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2024-02-21

Fast-scan cyclic voltammetry (FSCV) is an electrochemical sensing technique that can be used for neurochemical with high spatiotemporal resolution. Carbon fiber microelectrodes (CFMEs) are traditionally as FSCV sensors. However, CFMEs prone to fouling caused by oxidative byproducts of repeated serotonin (5-HT) exposure, which makes them less suitable a chronic 5-HT sensor. Our team developing boron-doped diamond microelectrode (BDDME) has previously been shown relatively resistant protein...

10.20944/preprints202407.0037.v1 preprint EN 2024-07-01

Carbon-fiber microelectrodes allow for high spatial and temporal measurements of electroactive neurotransmitter in vivo using fast-scan cyclic voltammetry (FSCV). However, common instrumentation such systems lack patient safety precautions. To add precautions as well to overcome chemical electrical noise, a two-electrode FSCV headstage was modified introduce an active bandpass filter on the electrode side measurement amplifier. This modification reduced measured noise ac-coupled voltammetric...

10.1021/acssensors.9b02249 article EN ACS Sensors 2020-06-25

Technologies capable of detecting changes in neurochemical signals can be used to understand the underlying mechanisms neurological diseases. They are also important components systems which rely on sensing as a source feedback for closed-loop neuromodulation[1], [2]. Recently, our research team has developed boron-doped diamond microelectrode (BDDME) fiber neurotransmitter detection using fast-scan cyclic voltammetry (FSCV). These electrodes have several potential benefits comparison more...

10.1109/ner52421.2023.10123806 article EN 2023-04-24

ABSTRACT 3D printed biomaterial implants are revolutionizing personalized medicine for tissue repair, especially in orthopedics. In this study, a radiopaque Bi 2 O 3 doped polycaprolactone ( PCL ) composite is developed and implemented to enable the use of diagnostic X-ray technologies, photon counting computed tomography PCCT ), comprehensive vivo device monitoring. filament with homogeneous nanoparticle NP dispersion (0.8 11.7 wt%) first fabricated. Tissue engineered scaffolds TES then...

10.1101/2024.02.26.582070 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2024-03-01

Many requirements and applications in various industrial sectors demand high-quality finishes on parts. These finishes, whether due to tolerances or surface quality, are often challenging achieve through additive manufacturing technologies, necessitating additional post-processing. This study aims investigate the effect of specific treatments parts produced Sintering Based Additive Manufacturing (SBAM), such as Fused Filament Fabrication (FFF). With premise employing affordable...

10.59499/ep246283253 article EN 2024-10-15

Neurochemical sensing with implantable devices has gained remarkable attention over the last few decades. A promising area of this research is progress novel electrodes as electrochemical tools for neurotransmitter detection in brain. The boron-doped diamond (BDD) electrode one such candidate that previously been reported its excellent properties, including a wide working potential, superior chemical inertness and mechanical stability, good biocompatibility resistance to fouling. Meanwhile,...

10.1101/2024.08.07.606919 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2024-08-09

Levels of the opioid peptide dynorphin, an endogenous ligand selective for kappa-opioid receptors (KORs), its mRNA and pro-peptide precursors are differentially dysregulated in Parkinson disease (PD) following development L-DOPA-induced dyskinesia (LID). It remains unclear, whether these alterations contribute to pathophysiological mechanisms underlying PD motor impairment subsequent LID, or they part compensatory mechanisms. We sought investigate nor-BNI, a KOR antagonist, 1) dopamine...

10.1101/2023.07.31.551112 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2023-08-01

Analysis of trace level metals in environmental samples (e.g., soil, water, and plant samples) is important for assessing quality food safety. This paper reports a non-toxic, eco-friendly, cost-effective sensing method, capable in-situ detection microgram per liter (µg/L) levels heavy metal ions soil solutions using carbon fiber electrodes (CFEs) produced without any microfabrication. The electrochemical behaviors the CFEs were characterized by cyclic voltammetry (CV) impedance spectroscopy...

10.2139/ssrn.4647772 preprint EN 2023-01-01
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