Carbon electrodes have gained wide popularity in biosensing applications in recent years. In this paper, we discuss carbon nanospikes fabricated using plasma enhanced chemical vapor deposition on a silicon wafer. Carbon nanospikes are preferred over other carbon nanostructures due to their batch reproducibility. Scanning electron microscope and Raman spectroscopy demonstrate spike-like and defectrich structure of the electrodes. Hydrogen peroxide has been chosen as the sensing analyte since it plays a vital role in various neurological disease states and is a byproduct of various electrochemical reactions.
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http://dx.doi.org/10.1109/EMBC.2018.8513401 | DOI Listing |
Anal Bioanal Chem
October 2023
Department of Chemistry, University of Virginia, Charlottesville, VA, 22901, USA.
Carbon nanospikes (CNSs) are a new nanomaterial that has enhanced surface roughness and surface oxide concentration, increasing the sensitivity for dopamine detection. However, CNS-modified electrodes (CNSMEs) have not been characterized for other neurochemicals, particularly those with higher oxidation potentials. The purpose of this study was to evaluate CNSMEs for the detection of adenosine, hydrogen peroxide (HO), and histamine.
View Article and Find Full Text PDFACS Appl Mater Interfaces
July 2023
Institute of Materials Chemistry, Chungnam National University, Daejeon 34134, South Korea.
The rational synthesis and tailoring of metal-organic frameworks (MOFs) with multifunctional micro/nanoarchitectures have emerged as a subject of significant academic interest owing to their promising potential for utilization in advanced energy storage devices. Herein, we explored a category of three-dimensional (3D) NiCoS nanospikes that have been integrated into a 1D FeC microarchitecture using a chemical surface transformation process. The resulting electrode materials, , FeC@NiCoS nanospikes, exhibit immense potential for utilization in high-performance hybrid supercapacitors.
View Article and Find Full Text PDFACS Omega
May 2023
Electrochemical Energy Storage Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Chennai, Tamil Nadu 603203, India.
A systematic synthetic method involving the anion exchange process was designed and developed to fabricate the superior functioning three-dimensional (3-D) urchin-architectured copper cobalt oxide (CuCoO; CCO) and copper cobalt sulfide (CuCoS; CCS) electrode materials from copper-cobalt carbonate double hydroxide [(CuCo)(CO)(OH); CCH]. The effective tuning of chemical, crystalline, and morphological properties was achieved during the derivatization process of CCH, based on the anion exchange effect and phase transformation without altering the 3-D spatial assembly. Benefiting from morphological and structural advantages, CCO and CCS exhibited superior electrochemical activity with capacity values of 1508 and 2502 C g at 10 A g to CCH (1182 C g at 10 A g).
View Article and Find Full Text PDFNanoscale
June 2023
Department of Chemistry, Duke University, Durham, North Carolina 27708, USA.
For the conversion of CO into fuels and chemical feedstocks, hybrid gas/liquid-fed electrochemical flow reactors provide advantages in selectivity and production rates over traditional liquid phase reactors. However, fundamental questions remain about how to optimize conditions to produce desired products. Using an alkaline electrolyte to suppress hydrogen formation and a gas diffusion electrode catalyst composed of copper nanoparticles on carbon nanospikes, we investigate how hydrocarbon product selectivity in the CO reduction reaction in hybrid reactors depends on three experimentally controllable parameters: (1) supply of dry or humidified CO gas, (2) applied potential, and (3) electrolyte temperature.
View Article and Find Full Text PDFMolecules
December 2022
Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA.
In this study, we electroplated Co and Cu on nano-spiked silicon substrates that were treated with femtosecond laser irradiations. With energy-dispersive X-ray (EDX) analysis by a scanning electron microscope (SEM), it was found that both Co and Cu are primarily coated on the spike surfaces without changing the morphology of the nanospikes. We also found that nanoscale bridges were formed, connecting the Co-coated silicon spikes.
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