Stephen J. K. O’Neill

ORCID: 0000-0003-0981-5161
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About
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Research Areas
  • Conducting polymers and applications
  • Advanced Sensor and Energy Harvesting Materials
  • Advanced Battery Technologies Research
  • Advancements in Battery Materials
  • Advanced Battery Materials and Technologies
  • Supramolecular Self-Assembly in Materials
  • 3D Printing in Biomedical Research
  • Carbon Dioxide Capture Technologies
  • Cyclone Separators and Fluid Dynamics
  • Tactile and Sensory Interactions
  • Nanomaterials and Printing Technologies
  • Oil, Gas, and Environmental Issues
  • Advanced biosensing and bioanalysis techniques
  • Irish and British Studies
  • Silicone and Siloxane Chemistry
  • Polydiacetylene-based materials and applications
  • Analytical Chemistry and Chromatography
  • Asian Geopolitics and Ethnography
  • Oil and Gas Production Techniques
  • Spacecraft and Cryogenic Technologies
  • Neuroscience and Neural Engineering
  • Bone Tissue Engineering Materials
  • Polymer composites and self-healing
  • Hydrogels: synthesis, properties, applications
  • Methane Hydrates and Related Phenomena

University of Cambridge
2021-2024

Trinity College Dublin
2020-2022

Stanford University
2020-2021

University of Edinburgh
2020

Marine Scotland
2001

While it is well-known that the electronic conductivity of electrodes has a critical impact on rate performance in batteries, this relationship been quantified only by computer simulations. Here we investigate between electrode and model cathode system lithium–nickel–manganese–cobalt–oxide (NMC) filled with various quantities carbon black, single-walled nanotubes, graphene. We find extreme anisotropy significant differences dependence mass fraction among different fillers. Fitting capacity...

10.1021/acsaem.0c00034 article EN ACS Applied Energy Materials 2020-01-30

Recent progress in the development of synthetic polymer networks has enabled next generation hydrogel-based machines and devices. The ability to mimic mechanical electrical properties human tissue gives great potential toward fields bioelectronics soft robotics. However, fabricating hydrogel devices that display high ionic conductivity while maintaining stretchability softness remains unmet. Here, we synthesize supramolecular poly(ionic) networks, which (>1500%), compressibility (>90%),...

10.1126/sciadv.adn5142 article EN cc-by-nc Science Advances 2024-07-17

Addressing the mechanical mismatch between biological tissue and traditional electronic materials remains a major challenge in bioelectronics. While rigidity of such limits biocompatibility, supramolecular polymer networks can harmoniously interface with tissues as they are soft, wet, stretchable. Here, an electrically conductive network that simultaneously exhibits both ionic conductivity while maintaining tissue-mimetic properties, providing ideal human body, is introduced. Rational design...

10.1002/adma.202207634 article EN cc-by Advanced Materials 2022-10-31

Abstract Flexible pressure sensors are an essential part of robotic skin for human–machine interfaces, wearables, and implantable biomedical devices. However, the desirable characteristics high sensitivity, conformability, good scalability often mutually exclusive. Here, a highly sensitive flexible sensor that can be easily fabricated by coating carbon flower elastomer composite is presented. The made from uniform‐sized particles exhibits contact‐based mechanism sensing, as opposed to...

10.1002/admi.202000875 article EN Advanced Materials Interfaces 2020-07-30

Journal Article Integrated Intelligent Instruments: Supercritical Fluid Extraction, Desorption, Reaction, and Chromatography Get access S.A. Liebman, Liebman Geo-Centers, Inc., c/o U.S. Army Chemical Research, Development, Engineering Center, Proving Ground, Maryland 21010-5423 Search for other works by this author on: Oxford Academic PubMed Google Scholar E.J. Levy, Levy Computer Systems, P.O. Box 683, Avondale, Pennsylvania 19311 S. Lurcott, Lurcott O'Neill, O'Neill J. Guthrie, Guthrie T....

10.1093/chromsci/27.3.118 article EN Journal of Chromatographic Science 1989-03-01

Implantable electronic medical devices are used in functional mapping of the brain before surgery and to deliver neuromodulation for treatment neurological neuropsychiatric disorders. Their electrode arrays assembled by hand, this leads bulky form factors with limited flexibility low counts. Thin film implants, made using microfabrication techniques, emerging as an attractive alternative, they offer dramatically improved conformability enable high density recording stimulation. A major...

10.1002/adhm.202200739 article EN cc-by Advanced Healthcare Materials 2022-07-24

While it is well-known that electrode conductivity has a critical impact on rate-performance in battery electrodes, this relationship been quantified only by computer simulations. Here we investigate the between and Lithium-Nickel-Manganese-Cobalt-Oxide (NMC) cathodes filled with various quantities of carbon black, single-walled nanotubes graphene. The always extremely anisotropic out-of-plane conductivity, which most relevant to rate-performance, roughly 1000 smaller than in-plane...

10.48550/arxiv.1912.02485 preprint EN other-oa arXiv (Cornell University) 2019-01-01

Abstract The objective of this paper is to describe a deterioration that was observed in the performance molecular sieve type Gas Driers, summarize work done identify root cause, modifications were implemented resolve problem, and explain extent which these effective resolving problem. During early 2012 pressure drop across Driers two trains within onshore gas processing facility Ras Laffan began increasing at faster rate than usual. This change correlated with an increase CO2 content...

10.2523/iptc-18313-ms article EN 2015-12-02

Abstract Objectives/Scope During 2015 a marked increase in the concentration of heat stable salts (HSS) within amine circulating around this unit was observed. This paper will present how root cause HSS accumulation identified and addressed also provide feedback from analyses indicating individual components that were to have been main contributors accelerated corrosion instance. Methods, Procedures, Processes An Acid Gas Removal Unit (AGRU) installed Dolphin Energy onshore gas plant remove...

10.2118/183351-ms article EN Day 3 Wed, November 17, 2021 2016-11-07
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