Functional Diamond最新文献_第4页

Morphology-dependent antibacterial properties of diamond coatings 形貌依赖性金刚石涂层的抗菌性能

Functional Diamond Pub Date : 2022-12-31 DOI: 10.1080/26941112.2022.2157225

Ruoying Zhang, Yuting Zheng, Jinlong Liu, Chengming Li, Chengke Chen, Xiaojun Hu, Jinlong Li, Ran Liu, H. Ye

{"title":"Morphology-dependent antibacterial properties of diamond coatings","authors":"Ruoying Zhang, Yuting Zheng, Jinlong Liu, Chengming Li, Chengke Chen, Xiaojun Hu, Jinlong Li, Ran Liu, H. Ye","doi":"10.1080/26941112.2022.2157225","DOIUrl":"https://doi.org/10.1080/26941112.2022.2157225","url":null,"abstract":"Abstract Microorganisms promoted corrosion has caused significant loss to marine engineering and the antibacterial coatings have served as a solution that has gained attention. In this study, the chemical vapour deposition technique has been employed to grow three different types of diamond coatings, namely, ultrananocrystalline diamond (UNCD), nanocrystalline diamond (NCD), and microcrystalline diamond (MCD) coatings. The evolution of associated surface morphology and the surface functional groups of the grown coatings have demonstrated antibacterial activity in seawater environments. It is found that different ratio of sp3/sp2 carbon bonds on the diamond coatings influences their surface property (hydrophobic/hydrophilic), which changes the anti-adhesion behaviour of diamond coatings against bacteria. This plays a critical role in determining the antibacterial property of the developed coatings. The results show that the diamond coatings arising from the deposition process kill the bacteria via a combination of the mechanical effects and the functional groups on the surface of UNCD, NCD, and MCD coatings, respectively. These antibacterial coatings are effective to both Gram-negative bacteria (E. coli) and Gram-positive bacteria (B. subtilis) for 1–6 h of incubation time. When the contact duration is prolonged to 6 h or over, the MCD coatings begin to reduce the bacteria colonies drastically and enhance the bacteriostatic rate for both E. coli and B. subtilis.","PeriodicalId":367894,"journal":{"name":"Functional Diamond","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127048986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Germanium gate hydrogen-terminated diamond field effect transistor with Al2O3 dielectric layer Al2O3介电层锗栅氢端金刚石场效应晶体管

Functional Diamond Pub Date : 2022-12-31 DOI: 10.1080/26941112.2022.2159775

Zhang Minghui, Wang Wei, Wen Feng, Lin Fang, Chen Genqiang, Wang Fei, He Shi, Wang Yanfeng, Fan Shuwei, Bu Renan, Min Tai, Yu Cui, Wang Hongxing

引用次数: 0

Research progress of spectra and properties of ultrahard carbon materials at high pressure and high temperature 超硬碳材料在高压高温下的光谱与性能研究进展

Functional Diamond Pub Date : 2022-12-31 DOI: 10.1080/26941112.2022.2163857

Zhiqiang Hou, Haikuo Wang, Yao Tang, Jiakun Wu, Chao Wang, Zhicai Zhang, X. Ouyang

{"title":"Research progress of spectra and properties of ultrahard carbon materials at high pressure and high temperature","authors":"Zhiqiang Hou, Haikuo Wang, Yao Tang, Jiakun Wu, Chao Wang, Zhicai Zhang, X. Ouyang","doi":"10.1080/26941112.2022.2163857","DOIUrl":"https://doi.org/10.1080/26941112.2022.2163857","url":null,"abstract":"Abstract Carbon, the fourth most abundant element in the Universe, possesses numerous allotropes with diverse bonding character (sp 1-, sp 2- and sp 3-hybridized bonds) and structural motif of the constituting atoms. In particular, the carbon materials with a fully or nearly 100% sp 3-hybridized strong C-C bonds often lead to excellent mechanical properties, chemical stability, thermal and optical properties, such as crystalline diamond and diamond-like amorphous carbon (DLC). In this review, we systematically summarize the synthesis, microstructure, mechanical properties, thermal and optical properties of ultrahard carbon materials with current experimental results on nano-polycrystalline diamond (NPD), nanotwinned diamond (NTD), micro-grained polycrystalline diamond (MPD), and amorphous diamond/carbon. In addition, we discuss the difference of spectra of XRD, Raman and EELS between various nanocrystalline diamond powder and ultrahard carbon materials. Finally, we provide our insights into the future development and applications in the research of ultrahard carbon bulk materials by high-pressure and high-temperature techniques according to the current advantages, limitations and challenges in the experiment.","PeriodicalId":367894,"journal":{"name":"Functional Diamond","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129199421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation effect of X-ray with 100 kGy dose on the electrical properties of MESFET based on hydrogen-terminated diamond surface conductivity 100 kGy剂量x射线辐射对端氢金刚石表面电导率MESFET电性能的影响

Functional Diamond Pub Date : 2022-12-31 DOI: 10.1080/26941112.2022.2066481

Mingchao Yang, T. Shimaoka, L. Sang, J. Kaneko, S. Koizumi, M. Liao

{"title":"Radiation effect of X-ray with 100 kGy dose on the electrical properties of MESFET based on hydrogen-terminated diamond surface conductivity","authors":"Mingchao Yang, T. Shimaoka, L. Sang, J. Kaneko, S. Koizumi, M. Liao","doi":"10.1080/26941112.2022.2066481","DOIUrl":"https://doi.org/10.1080/26941112.2022.2066481","url":null,"abstract":"Abstract The irradiation effect of X-ray on the electrical properties of Schottky-barrier diode (SBD) and metal-semiconductor field-effect transistors (MESFET) based on the surface conductivity of hydrogen-terminated single-crystal diamond (SCD) epilayers was investigated. The Ohmic contact was formed by a Pd/Ti/Au multilayer and the Schottky metal was Al thin film for the fabrication of the diamond SBDs and MESFETs. The X-ray irradiation was performed with a dose of 100 kGy. It was observed that both the forward current of the SBDs and the drain current of the MESFETs experienced a reduction after the X-ray irradiation. The type of the single-crystal diamond substrate had an obvious effect on the radiation properties. For the MESFETs on the type-Ib SCD substrate, the variation of the drain currents as the irradiation was inhomogeneous across the devices. For the MESFETs on the type-IIa SCD substrate, the reduction of the drain currents is more uniform and the threshold voltage changed little upon X-ray irradiation. The partial oxidation in the air of the exposure area in the device and the edge of the Al gate may be responsible for the degradation of the device performance under X-ray irradiation. The passivation technique with radiation-robustness is needed for diamond devices based on the surface conductivity of diamond.","PeriodicalId":367894,"journal":{"name":"Functional Diamond","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121695660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent applications of fluorescent nanodiamonds containing nitrogen-vacancy centers in biosensing 含氮空位中心荧光纳米金刚石在生物传感中的最新应用

Functional Diamond Pub Date : 2022-12-10 DOI: 10.1080/26941112.2022.2153233

Yuchen Feng, Qi Zhao, Yuxi Shi, Guanyue Gao, Jinfang Zhi

引用次数: 2

Diamond dislocations analysis by X-ray topography 金刚石位错的x射线形貌分析

Functional Diamond Pub Date : 2022-12-08 DOI: 10.1080/26941112.2022.2149279

S. Shikata

{"title":"Diamond dislocations analysis by X-ray topography","authors":"S. Shikata","doi":"10.1080/26941112.2022.2149279","DOIUrl":"https://doi.org/10.1080/26941112.2022.2149279","url":null,"abstract":"Abstract The dislocation identification method using X-ray topography by reflection mode geometry was applied to characterize IIa, Ib and highly B doped high pressure high temperature (HPHT) grown crystals. In both IIa and Ib crystals, dislocations are found to propagate in the <111> grown direction, with dominant vectors of [110] and [1-10], neither of which has no c-axis segment. For Ib crystal, many dislocations are also generated in the <112> and <121> directions, which are slightly tilted to <111>. It was confirmed that the dislocations in the same direction have the same Burgers vectors, but the dislocations are spread in broad area. A total of up to 20 HPHT crystals were measured and found to exhibit different dislocation distributions. This indicates an immature growth technique in terms of dislocation. Measurements of four chemical vapor deposition (CVD) substrates showed numerous dislocation bundles, making individual dislocation directions analysis impossible. CVD substrates suffer from an increase in dislocations due to CVD growth, resulting in poor diamond quality in terms of dislocation. XRT analysis on dislocations of epitaxial growth will be very important prior to CVD substrates analysis.","PeriodicalId":367894,"journal":{"name":"Functional Diamond","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123936207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Tuning diamond electronic properties for functional device applications 用于功能器件应用的金刚石电子特性调谐

Functional Diamond Pub Date : 2022-12-05 DOI: 10.1080/26941112.2022.2151322

Anliang Lu, Limin Yang, C. Dang, Heyi Wang, Yang Zhang, Xiaocui Li, Hongti Zhang, Yang Lu

引用次数: 1

Room-temperature bonding of GaN and diamond via a SiC layer 氮化镓和金刚石通过SiC层的室温键合

Functional Diamond Pub Date : 2022-12-01 DOI: 10.1080/26941112.2022.2145508

Ayaka Kobayashi, Hazuki Tomiyama, Y. Ohno, Y. Shimizu, Y. Nagai, N. Shigekawa, Jianbo Liang

引用次数: 2

Past, present, and the future of the research and commercialization of CVD diamond in China 中国CVD金刚石研究和商业化的过去、现在和未来

Functional Diamond Pub Date : 2022-11-21 DOI: 10.1080/26941112.2022.2144769

F. Lu

引用次数: 5

Viability and proliferation of A549 cell line on the surface of micro-, nano- and ultrananocrystalline diamond films grown by HFCVD with tailored gases HFCVD在微、纳米和超晶金刚石膜表面生长A549细胞系的活力和增殖

Functional Diamond Pub Date : 2022-10-03 DOI: 10.1080/26941112.2022.2126950

J. Montes-Gutierrez, A. A. Gil-Salido, J. Alcantar-Peña, E. de Obaldía, R. García-Gutiérrez, O. Contreras-López, O. Auciello

{"title":"Viability and proliferation of A549 cell line on the surface of micro-, nano- and ultrananocrystalline diamond films grown by HFCVD with tailored gases","authors":"J. Montes-Gutierrez, A. A. Gil-Salido, J. Alcantar-Peña, E. de Obaldía, R. García-Gutiérrez, O. Contreras-López, O. Auciello","doi":"10.1080/26941112.2022.2126950","DOIUrl":"https://doi.org/10.1080/26941112.2022.2126950","url":null,"abstract":"Abstract This article describes key material science/technology issues to implement polycrystalline diamond scaffolds to enable processes for biological cells growth relevant for using cells grown in the laboratory for the treatment of human biological conditions. Issues investigated include 1. Synthesis/characterization of microcrystalline diamond (MCD), nanocrystalline diamond (NCD) and transformational ultrananocrystalline diamond (UNCD) coating-based scaffolds. Diamond films were grown on silicon substrates using the hot filament chemical vapor deposition (HFCVD) technique, by which filaments heated to ∼2,300 °C induce cracking of CH4 molecules into C atoms/CHx (x = 1, 2, 3) radicals, growing diamond films via chemical reaction on the substrates’ surface. MCD and NCD + films were grown flowing the H2/CH4 gas mixture. NCD- and UNCD films were grown using the Ar/CH4 gas mixture plus H2 flux (73.5%, 49%, and 9.8%), which for high fluxes, induced increased the concentration of H-containing trans-polyacetylene (T-PA) molecules in UNCD films’ grain boundaries, impacting biological performance. 2. Studies of viability and proliferation of human lung carcinoma cell line (A549) grown on surfaces of MCD, NCD, and UNCD films, using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay, which showed no significant difference in cell proliferation among the MCD, NCD, and UNCD films.","PeriodicalId":367894,"journal":{"name":"Functional Diamond","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126064548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1