Electrochemical characterization of doped diamond-coated carbon fibers at different boron concentrations

Almeida, E.C.; Diniz, A.V.; Trava-Airoldi, V.J.; Ferreira, N.G.

doi:10.1016/j.tsf.2005.03.053

Cited by 23 publications

(10 citation statements)

References 22 publications

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“…The specific capacity equals 2.6 mF cm −2 for the CF produced at 1300 K. Similar works were performed also in the case when the gas mixture was enriched with the boron source, resulting in BDD coverage over the carbon fiber with a doping level of 1.5×10 21 cm −3 . The electrochemical performance revealed the strengthened capacitive behavior owing to the increased surface area.…”

Section: Diamond‐based Compositessupporting

confidence: 58%

Nano‐engineered Diamond‐based Materials for Supercapacitor Electrodes: A Review

Siuzdak

Bogdanowicz

2017

Energy Tech

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Owing to the popularity of carbon‐based supercapacitors, diamond has been examined as a potential candidate for such devices with unique advantages such as a wide electrochemical potential window and stable capacitive behavior in both aqueous and non‐aqueous electrolytes. Moreover, its chemical stability in harsh environments at extreme applied potentials and currents provides unique opportunities for designing new supercapacitors. Owing to the intrinsic low surface area of diamond, it is necessary to increase the electrochemically active surface area or to produce diamond‐based composites, thereby ensuring capacitance improvement for the practical applications. According to previous literature reports, nano‐engineered diamond structures can achieve a specific capacitance values as high as 10 mF cm−2 with a specific energy of 10–100 Wh kg−1 in aqueous electrolyte. The present manuscript reviews the recent advances in this topic of research by highlighting the potentials and challenges of diamond‐based supercapacitors. Special attention is paid to the fabrication methods and electrochemical performance of particular material combinations in view of further application for supercapacitor construction.

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Section: Diamond‐based Compositessupporting

confidence: 58%

Nano‐engineered Diamond‐based Materials for Supercapacitor Electrodes: A Review

Siuzdak

Bogdanowicz

2017

Energy Tech

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“…Complementary analysis of CFs by confocal Raman microscopy is also presented in Figure 4a–e. A well-established characterization method in studying carbon-based materials, Raman technique has traditionally played an important role in providing information on sp 2 or sp 3 hybridization in materials, existence of chemical impurities, defects, and other crystal disorders, such as induced strain [4,6,7,8,9,15,19,32,33,34,35,41,42,43]. As compared with the previous images of conventional SEM, the surface and cross-sectional confocal Raman mapping images presented in Figure 4a–d show regions that do not lie within the focal plane of the optics and that are therefore not well defined.…”

Section: Resultsmentioning

confidence: 99%

“…To meet the requirements of efficient electrochemical detection, the quality of BDD microelectrodes depends not only on the boron doping level, but also on the choice of the substrate used, as the lattice mismatch between the substrate and the BDD thin film can induce an unwanted strained structure on the latter [32,33]. Thus, deposition of BDD on carbon fibers has been proposed to reduce CF surface degradation [34,35]. This approach can also reduce the number of defects in the BDD thin film, as an unstrained structure is anticipated; no lattice mismatch occurs, because both the substrate and the thin film are carbon-based materials.…”

Section: Introductionmentioning

confidence: 99%

“…This approach can also reduce the number of defects in the BDD thin film, as an unstrained structure is anticipated; no lattice mismatch occurs, because both the substrate and the thin film are carbon-based materials. On the other hand, difficulty in such deposition has also been reported [34,35], as the atomic hydrogen needed for diamond growth will etch the carbon substrate.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Carbon-Based Microelectrodes for Neurochemical Sensing

Manciu

Barath

et al. 2019

Materials

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The comprehensive microscopic, spectroscopic, and in vitro voltammetric analysis presented in this work, which builds on the well-studied properties of carbon-based materials, facilitates potential ways for improvement of carbon fiber microelectrodes (CFMs) for neuroscience applications. Investigations by both, scanning electron microscopy (SEM) and confocal Raman spectroscopy, confirm a higher degree of structural ordering for the fibers exposed to carbonization temperatures. An evident correlation is also identified between the extent of structural defects observed from SEM and Raman results with the CFM electrochemical performance for dopamine detection. To improve CFM physico-chemical surface stability and increase its mechanical resistance to the induced compressive stress during anticipated in vivo tissue penetration, successful coating of the carbon fiber with boron-doped diamond (BDD) is also performed and microspectroscopically analyzed here. The absence of spectral shifts of the diamond Raman vibrational signature verifies that the growth of an unstrained BDD thin film was achieved. Although more work needs to be done to identify optimal parameter values for improved BDD deposition, this study serves as a demonstration of foundational technology for the development of more sensitive electrochemical sensors, that may have been impractical previously for clinical applications, due to limitations in either safety or performance.

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“…Similarly, the DWNT electrode is much better than previously studied diamond electrodes, since these electrodes have slower electrontransfer rates and sometimes need chemical modification or acid treatment in order to improve their electrochemical properties. [29][30][31][32][33][34] A comparison between the various parameters characterizing the electrochemical properties of other carbon-based electrode materials is presented in Table I.…”

Section: F14mentioning

confidence: 99%

Double-Walled Carbon Nanotube Electrodes for Electrochemical Sensing

Punbusayakul

Talapatra

et al. 2007

Electrochem. Solid-State Lett.

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We report on the electrochemical properties of electrodes fabricated using spun fibers of purified double-walled nanotubes ͑DWNTs͒. These electrodes show reversible and faster electron-transfer kinetics in electrochemical reactions compared to multiwalled nanotubes ͑MWNTs͒ and standard glassy carbon electrodes ͑GCE͒. The detection capabilities of the DWNT electrodes for chemical species such as hydrogen peroxide, ascorbic acid ͑AA͒, and electroactive neurotransmitters such as dopamine are presented and compared with the detection abilities for these species using GCE and MWNT. These electrodes also show excellent selective sensing properties ͑with observed detection limits as low as 20 M of DA in 1 mM of AA͒ and can be developed for active components in electrochemical sensors.Carbon nanotubes ͑CNTs͒ have gained considerable attention due to their exceptional electronic, mechanical, and chemical properties. 1-6 They also possess several unique features such as the ability to carry large current densities, and they have fast electrontransfer kinetics when used as electrodes 7-9 for electrochemical sensing applications. This has led to the investigations of the electrochemical properties of various types of CNTs structures. 10-17 Further, electrodes fabricated using CNTs for electrochemical sensing have the added advantage of reduced reaction potential and minimum surface fouling effects 9-12 and therefore offer superior performance when used as an electrochemical sensors. As a result of the ease of production of aligned multiwalled nanotube ͑MWNT͒ bundles, initially the electrochemical properties of macroarchitecture MWNT electrodes were extensively studied. 18-21 Very recently the electrochemical properties of an individual single-walled nanotube ͑SWNT͒ electrodes fabricated using nanolithography and their possible use as nanoelectrodes for electrochemical applications were demonstrated. 22 Typically electrode fabrication using SWNTs is complicated and therefore puts limitations for developing them for viable devices for electrochemical sensing applications. Electrodes fabricated with large ensembles of MWNTs, although showing promising electrochemical properties, are unable to provide good selectivity. With the development of techniques for bulk production of double-walled nanotubes ͑DWNTs͒, 23,24 having physical properties similar to those of SWNTs, the possibility of developing these for various applications is envisioned. In this article we report on the electrochemical properties and sensing capabilities of DWNT ropes. The DWNT electrodes show a very wide window of operating potential without significant water hydrolysis. The superior ability of these electrodes for detection of frequently used electrochemical species like hydrogen peroxide ͑HP͒, L-ascorbic acid ͑AA͒, and dopamine ͑DA͒ is demonstrated. The DWNT electrodes are also able to distinguish extremely low concentrations of DA in the premixed solution of AA and DA, indicating excellent selective sensing capabilities. ExperimentalThe DWNTs used in thi...

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Electrochemical characterization of doped diamond-coated carbon fibers at different boron concentrations

Cited by 23 publications

References 22 publications

Nano‐engineered Diamond‐based Materials for Supercapacitor Electrodes: A Review

Nano‐engineered Diamond‐based Materials for Supercapacitor Electrodes: A Review

Analysis of Carbon-Based Microelectrodes for Neurochemical Sensing

Double-Walled Carbon Nanotube Electrodes for Electrochemical Sensing

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