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Wyniki wyszukiwania dla: CVD
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Improved surface coverage of an optical fibre with nanocrystalline diamond by the application of dip-coating seeding
PublikacjaGrowth processes of diamond thin films on the fused silica optical fibres (10 cm in length) were investigated at various temperatures. Fused silica pre-treatment by dip-coating in a dispersion consisting of detonation nanodiamond (DND) in dimethyl sulfoxide (DMSO) with polyvinyl alcohol (PVA) was applied. Nanocrystalline diamond (NCD) films were deposited on the fibres using the microwave plasma assisted chemical vapour deposition...
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Influence of the boron doping level on the electrochemical oxidation of the azo dyes at Si/BDD thin film electrodes
PublikacjaIn this study the efficiency of electrochemical oxidation of aromatic pollutants, such as reactive dyes, at boron-doped diamond on silicon (Si/BDD) electrodes was investigated. The level of [B]/[C] ratio which is effective for the degradation and mineralization of selected aromatic pollutants, and the impact of [B]/[C] ratio on the crystalline structure, layer conductivity and relative sp3/sp2 coefficient of a BDD electrode were...
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Diamondized carbon nanoarchitectures as electrocatalytic material for sulfate-based oxidizing species electrogeneration
PublikacjaThe introduction of nanotechnology seems to be an imperative factor to intensify the synergic effects of electrocatalytic materials to produce strong oxidant species or to increase the active sites on their surfaces as well as to enhance the conversion yield in a fuel cell, high-added value products, electrolytic treatment for environmental protection or the detection limit in electroanalysis. Recently, a new type of 3D-diamond...
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Electrical characterization of diamond/boron doped diamond nanostructures for use in harsh environment applications
PublikacjaThe polycrystalline boron doped diamond (BDD) shows stable electrical properties and high tolerance for harsh environments (e.g. high temperature or aggressive chemical compounds) comparing to other materials used in semiconductor devices. In this study authors have designed electronic devices fabricated from non-intentionally (NiD) films and highly boron doped diamond structures. Presented semiconductor devices consist of highly...
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Fabrication and characterization of boron-doped nanocrystalline diamond-coated MEMS probes
PublikacjaFabrication processes of thin boron-doped nanocrystalline diamond (B-NCD) films on silicon-based micro- and nano-electromechanical structures have been investigated. Nanocrystalline boron doped -diamond (B-NCD) films were deposited using Microwave Plasma Assisted Chemical Vapour Deposition (MW PA CVD) method. The variation of B-NCD morphology, structure and optical parameters were particularly investigated. The use of truncated...
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Electrochemical oxidation of ionic liquids at highly boron doped diamond electrodes
PublikacjaUtlenianie elektrochemiczne przy zastosowaniu elektrod diamentowych wysoko domieszkowanych borem (BDD) było badane pod względem przydatności do utylizacji roztworów zawierających ciecze jonowe (ILs). Dwustronne elektrody Si/BDD przygotowano metodą chemicznego osadzania z fazy lotnej wspomaganego plazmą (MW PE CVD). Badanie przy użyciu skaningowej mikroskopii elektronowej (SEM) potwierdziło, że wytworzone warstwy były ciągłe i miały...
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Cadmium complex possessing simultaneously silanethiolato- and dithiocarbamato-ligands. A novel single-source precursor of cadmium sulfide
PublikacjaThermal decomposition of suitable coordination compounds may be used as efficient route for fabrication of semiconducting layers. A new potential CdS precursor—a cadmium complex with all-sulfur Cd-coordination sphere [Cd{l-SSi(OBut)3}(S2CNC4H8)]2 (1) —has been prepared and its properties are investigated. The complex was obtained in the reaction between dimeric bis(tri-tert-butoxysilanethiolato) cadmium(II) [Cd{SSi(OBut)3}2]2 and...
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Advancements in Diamond-Like Carbon Coatings
PublikacjaAn essential resource for engineers and scientists in the coatings field, providing an in-depth examination of current and advanced technologies for industrially oriented nanoceramic and nanocomposite coatings
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Functionalization of Parylene During Its Chemical Vapor Deposition
PublikacjaTwo possible mechanisms for the reaction of four halogenated (metha)acrylate-based molecules with Parylene [poly (paraxylylene)] during its chemical vapor deposition were proposed. The chemical reactivity of acrylate double bond with the paraxylylene biradical was calculated for all four (metha)acrylate-based molecules. These calculations allowed the evaluation of the energetically favorable mechanism and indeed a direct correlation...
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Monitoring ramanowski wzrostu cienkich warstw węglowych-studium
PublikacjaPrzedstawiono zagadnienia monitorowania in-situ prózniowego procesu wzrostu cienkich warstw węglowych, a w szczególności diamentowych i diamentopodobnych DLC. Zastosowanie pomiarów ramanowskich umożliwia zbadanie struktury warstwy na poziomie molekularnych (zawartości faz węglowych sp2 i sp3, a także defektów wodorowych). Użycie spektroskopii in-situ podczas procesu syntezy pozwala monotorować poprawność przebiegu procesu i opracować...
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Influence of substituents in vinyl groups on reactivity of parylene during polymerization process
PublikacjaPraca zawiera wyniki obliczeń kwantowych wielokonfiguracyjnych i DFT mechanizmów reakcji parylenu i cząsteczek z wiązaniami podwójnymi w fazie gazowej. Zbadany został i zanalizowany wpływ podstawników w strukturach alkenów na reaktywność parylenu i alkenów.
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Optically transparent boron-doped nanocrystalline diamond films for spectroelectrochemical measurements on different substrates
PublikacjaFabrication process of optically transparent boron nanocrystalline diamond (BNCD) electrode on silicon and quartz substrate was shown. The B-NCD films were deposited on the substrates using Microwave Plasma Assisted Chemical Vapor Deposition (MWPACVD) at glass substrate temperature of 475 ºC. A homogenous, continuous and polycrystalline surface morphology with high sp3 content in B-NCD films and film thickness depending from substrate...
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Optical and electrical properties of boron doped diamond thin conductive films deposited on fused silica glass substrates
PublikacjaThis paper presents boron-doped diamond (BDD) film as a conductive coating for optical and electronic purposes. Seeding and growth processes of thin diamond films on fused silica have been investigated. Growth processes of thin diamond films on fused silica were investigated at various boron doping level and methane admixture. Two step pre-treatment procedure of fused silica substrate was applied to achieve high seeding density....
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Formation of Highly Conductive Boron-Doped Diamond on TiO2 Nanotubes Composite for Supercapacitor or Energy Storage Devices
PublikacjaIn the present paper, we report the phenomena of the formation of the novel composite nanostructures based on TiO2 nanotubes (NTs) over-grown by thin boron-doped diamond (BDD) film produced in Microwave Plasma Enhanced Chemical Vapor Deposition (PE MWCVD). The TiO2 nanotube array overgrown by boron-doped diamond immersed in 0.1 M NaNO3 can deliver high specific capacitance of 7.46 mF cm−2. The composite electrodes were characterized...
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From ashes to porous hierarchical nanocarbon electrode: Upcycling secondary waste materials through self-catalytic chemical vapour deposition
PublikacjaMetal and metal oxide particles are abundant in various ash-based wastes. Utilizing these as catalyst sources for the fabrication of carbon nanomaterials could present a valuable approach to reduce our reliance on non-renewable and costly catalyst sources, thereby facilitating large-scale nanomaterial production. In this context, secondary waste materials (SWMs) are by-products resulting from the (complete or partial) combustion...
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Metal salts reduction during parylenes polymerization
PublikacjaPublikacja o wynikach obliczeń kwantowych o możliwości redukcji niektórych soli metali przy pomocy rodników parylenu w czasie jego polimeryzacji.
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Synteza warstw diamentowych do zastosowań optoelektronicznych
PublikacjaDiamenty stosowane w optoelektronice i sensoryce syntetyzowane są w próżni przy użyciu plazmy niskotemperaturowej. Nanostruktury powstają przez wzrost struktur z molekuł, a nawet atomów. Wytwarzanie nanostruktur wymaga precyzyjnego monitoringu procesu syntezy. Optoelektroniczne metody pomiarowe zapewniają kontrolę wzrostu warstw oraz ocenę in situ parametrów materiałowych. W artykule przedstawiono optoelektroniczne metody badania...
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Carbon nanowalls: A new versatile graphene based interface for laser desorption/ionization-mass spectrometry detection of small compounds in real samples.
PublikacjaCarbon nanowalls, vertically aligned graphene nanosheets, attract attention owing to their tunable band-gap, high conductivity, high mechanical robustness, high optical absorbance and other remarkable properties. In this paper, we report for the first time, the use of hydrophobic boron-doped carbon nanowalls (CNWs) for laser desorption/ionization of small compounds and their subsequent detection by mass spectrometry (LDI-MS). The...
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Diamond Structures for Tuning of the Finesse Coefficient of Photonic Devices
PublikacjaFinesse coefficient is one of the most important parameters describing the properties of a resonant cavity. In this research, a mathematical investigation of the application of diamond structures in a fiber-optic Fabry–Perot measurement head to assess their impact on the finesse coefficient is proposed. We present modeled transmission functions of cavities utilizing a nitrogen-doped diamond, a boron-doped diamond, nanocrystalline...
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Metoda wytwarzania mikroczujników i elektrod elektrochemicznych przez selektywny wzrost polikrystalicznych warstw diamentowych maskowany warstwami dwutlenku krzemu
PublikacjaOpisano wytwarzanie matrycy mikroelektrod wykonanych z diamentu domieszkowanego borem do zastosowań w czujnikach elektrochemicznych. Praca jest podzielona na 8 rozdziałów. W pierwszym rozdziale opisano cele i motywacje do stworzenia diamentowych matryc. Następnie opisano zalety mikroelektrod i przedstawiony aktualny stan wiedzy dotyczący syntezy polikrystalicznych diamentowych elektrod. W trzecim rozdziale przedstawiono krótki...