Detection methods of diamond diffraction peaks in ultrananocrystalline diamond/amorphous carbon composite films by X-ray diffraction measurement with semiconductor counter detector

Hara, T.; Nojiri, Y.; Hanada, Kenji; Yoshitake, Tsuyoshi

doi:10.7567/jjap.54.108002

Cited by 7 publications

(4 citation statements)

References 25 publications

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“…In our previous study, we successfully grew NCD/a-C and B-doped NCD/a-C films via CAPD at room temperature under vacuum with a high deposition rate. [6,7] These conditions are unusual for growing NCD via CVD. Furthermore, the deposited films exhibited superior performance as an electrode in the electrolytic reaction to degrade the recalcitrant substances.…”

Section: Introduction and Our Proposalmentioning

confidence: 99%

Electrochemical detection characteristics of the composite films of boron‐doped nanocrystalline diamond and amorphous carbon prepared using the coaxial arc plasma deposition method

Hara

Hashiguchi

Ogishima

et al. 2020

IEEJ Transactions Elec Engng

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In this study, we applied coaxial arc plasma deposition in vacuum and without substrate heating to prepare composite films of boron‐doped nanocrystalline diamond and amorphous carbon (B‐doped NCD/a‐C) exhibiting electrochemical characteristics similar to those exhibited by the conductive polycrystalline diamond electrodes. Furthermore, we confirmed that the deposited films can be used to determine the current density owing to various concentrations of potassium ferricyanide (K3[Fe(CN6)]). Moreover, the concentration of K3[Fe(CN6)] and its current density were strongly correlated. Based on these experimental results, the deposited films were highly valuable as electrodes for electrochemical sensors. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Introduction and Our Proposalmentioning

confidence: 99%

Electrochemical detection characteristics of the composite films of boron‐doped nanocrystalline diamond and amorphous carbon prepared using the coaxial arc plasma deposition method

Hara

Hashiguchi

Ogishima

et al. 2020

IEEJ Transactions Elec Engng

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“…Among the methods of sp 3 characterization, Raman spectroscopy is a popular optical technique used to investigate bonding structures of carbon films. Although, there has been a debate regarding the accuracy of identifying the UNCD crystallites using this method [19,20] and it can't estimate the sp 3 fraction precisely [21]. While the NEXAFS and HEELS techniques are available for analyzing bonding structures, they also show some uncertainty in estimating the sp 3 fraction [22].…”

Section: Introductionmentioning

confidence: 99%

Effects of Air Exposure on Hard and Soft X-ray Photoemission Spectra of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films

et al. 2018

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Hard X-ray photoemission spectroscopy (HAXPES) was employed for the structural evaluation of ultrananocrystalline diamond/amorphous carbon (UNCD/a-C) composite films deposited on cemented carbide substrates, at substrate temperatures up to 550 °C by coaxial arc plasma deposition. The results were compared with those of soft X-ray photoemission spectroscopy (SXPES). Since nanocrystalline diamond grains are easily destroyed by argon ion bombardment, the structural evaluation of UNCD/a-C films, without the argon ion bombardment, is preferable for precise evaluation. For samples that were preserved in a vacuum box after film preparation, the sp3 fraction estimated from HAXPES is in good agreement with that of SXPES. The substrate temperature dependencies also exhibited good correspondence with that of hardness and Young’s modulus of the films. On the other hand, the sp3 fraction estimated from SXPES for samples that were not preserved in the vacuum box had an apparent deviation from those of HAXPES. Since it is possible for HAXPES to precisely estimate the sp3 fraction without the ion bombardment treatment, HAXPES is a feasible method for UNCD/a-C films, comprising nanocrystalline diamond grains.

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“…These are the same issues as the challenges with diamond electrode preparation aforementioned in (i) to (iii). However, in our previous study, we established that the NCD growth by CAPD can be performed in a vacuum without providing the substrate temperature [12]. CAPDprepared B-doped NCD/a-C films can be proposed as highly functional electrochemical electrodes similar to conductive PCD electrodes; moreover, they are significantly less expensive than CVD-prepared conductive PCD electrodes in terms of both equipment and material costs.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a Fundamental Electrochemical Measurement System for an Electrochemical Sensor

Hara¹,

Kinoshita²,

Yamamoto³

et al. 2022

JIIAE

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A fundamental electrochemical measurement system for an electrochemical sensor was built using a microcomputer control. It is crucial that the electrochemical sensor results can be used for both qualitative and quantitative analysis. These fundamental data are estimated by cyclovoltammetry (CV) and chronoamperometry (CA) measurements, which are major measurement methods in the electrochemical engineering field. The CV measurement function has already been built in our previous study and its functionality was confirmed to be nearly identical to that of a commercially available potentiostat. The CA measurement function was implemented in this study to allow our system to perform quantitative analysis of substances. Further, we started fabricating working electrodes. Therefore, we learned how to construct a high-performance and low-cost self-made electrochemical sensor.

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Detection methods of diamond diffraction peaks in ultrananocrystalline diamond/amorphous carbon composite films by X-ray diffraction measurement with semiconductor counter detector

Cited by 7 publications

References 25 publications

Electrochemical detection characteristics of the composite films of boron‐doped nanocrystalline diamond and amorphous carbon prepared using the coaxial arc plasma deposition method

Electrochemical detection characteristics of the composite films of boron‐doped nanocrystalline diamond and amorphous carbon prepared using the coaxial arc plasma deposition method

Effects of Air Exposure on Hard and Soft X-ray Photoemission Spectra of Ultrananocrystalline Diamond/Amorphous Carbon Composite Films

Fabrication of a Fundamental Electrochemical Measurement System for an Electrochemical Sensor

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