The lack of large-area single-crystal diamond wafers has led us to downscale diamond electronic devices. Here, we design and fabricate a hydrogenated diamond (H-diamond) triple-gate metal-oxide-semiconductor field-effect transistor (MOSFET) to extend device downscaling and increase device output current. The device's electrical properties are compared with those of planar-type MOSFETs, which are fabricated simultaneously on the same substrate. The triple-gate MOSFET's output current (174.2 mA mm) is much higher than that of the planar-type device (45.2 mA mm), and the on/off ratio and subthreshold swing are more than 10 and as low as 110 mV dec, respectively. The fabrication of these H-diamond triple-gate MOSFETs will drive diamond electronic device development forward towards practical applications.
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http://dx.doi.org/10.1038/srep34757 | DOI Listing |
Adv Sci (Weinh)
December 2024
Institute of Materials Science, Technische Universität Darmstadt, Peter-Grünberg-Str. 2, D-64287, Darmstadt, Germany.
The design of cathode/electrolyte interfaces in high-energy density Li-ion batteries is critical to protect the surface against undesirable oxygen release from the cathodes when batteries are charged to high voltage. However, the involvement of the engineered interface in the cationic and anionic redox reactions associated with (de-)lithiation is often ignored, mostly due to the difficulty to separate these processes from chemical/catalytic reactions at the cathode/electrolyte interface. Here, a new electron energy band diagrams concept is developed that includes the examination of the electrochemical- and ionization- potentials evolution upon batteries cycling.
View Article and Find Full Text PDFActas Dermosifiliogr
December 2024
Servicio de Dermatología, Hospital Clínic de Barcelona, Universitat de Barcelona, España; Servicio de Dermatología, Hospital de Figueres, Fundació Salut Empordà, España. Electronic address:
Wood's light (WL) is a useful, economical and easy-to-learn diagnostic tool. Despite its advantages, the use of LW among dermatologists is limited. In porokeratosis, the "diamond necklace" sign has been described, corresponding to the white fluorescence of the hyperkeratotic scale.
View Article and Find Full Text PDFChemosphere
December 2024
Comenius University in Bratislava, Faculty of Natural Sciences, Department of Analytical Chemistry, Ilkovičova 6, SK-842 15 Bratislava, Slovak Republic; University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zátiší 728/II, CZ-389 25 Vodňany, Czech Republic. Electronic address:
The highly efficient degradation of persistent organic substances by electrochemical advanced oxidation processes (EAOPs), which don't result in the formation of potentially harmful by-products, is crucial for the future of water management. In this study, boron-doped diamond electrodes (BDDE) with three morphologies (planar 2D, microstructured 2D, and macroporous 3D) were employed for the anodic oxidation of diclofenac (DCF) in two working electrolytes (NaCl and NaSO). In total, 11 by-products formed during the electrochemical oxidation of DCF were identified via HPLC-HRMS.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Department of Materials Science and Engineering, and State Key Laboratory of Marine Pollution, and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong S.A.R. 999077, China.
Metallic 1T phase molybdenum disulfide (MoS) is among the most promising electrode materials for supercapacitors, but its capacitance and cyclability remain to be improved to meet the constantly increasing energy storage needs in portable electronics. In this study, we present a strategy, covalent functionalization, which achieves the improvement of capacitance of metallic 1T phase MoS. Covalently functionalized by the modifier 4-bromobenzenediazonium tetrafluoroborate, the metallic MoS membrane exhibits increased interlayer spacing, slightly curled layered architecture, enhanced charge transfer, and improved adsorption capabilities toward electrolyte molecules and ions.
View Article and Find Full Text PDFMicrob Pathog
December 2024
Diamond Harbour Women's University, Department of Zoology, Sarisha, West Bengal, 743368, India. Electronic address:
Naegleria fowleri, is the causative agent of Primary Amoebic Meningoencephalitis (PAM), a lethal acute brain inflammation with high mortality. The virulent and reproductively active trophozoite stage of N. fowleri migrates to central nervous system (CNS) by entering through nasal passage and causes severe neural infection, brain disease and inflammation with high mortality.
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