Thematische Bibliographien / Interstitial doping of C and N

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Auswahl der wissenschaftlichen Literatur zum Thema „Interstitial doping of C and N“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 2. Februar 2022

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Zeitschriftenartikel zum Thema "Interstitial doping of C and N"

Piątkowska, Aleksandra, Magdalena Janus, Kacper Szymański und Sylwia Mozia. „C-,N- and S-Doped TiO2 Photocatalysts: A Review“. Catalysts 11, Nr. 1 (19.01.2021): 144. http://dx.doi.org/10.3390/catal11010144.

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This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the non-metal doping are also discussed. Moreover, selected applications of the non-metal doped TiO2 photocatalysts are shown, including the removal of organic compounds from water/wastewater, air purification, production of hydrogen, lithium storage, inactivation of bacteria, or carbon dioxide reduction.

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Kosaka, Hisashi, Yasuyuki Kaneno und Takayuki Takasugi. „Ductilization of a Ni₃(Si,Ti) Intermetallic Alloy by Addition of Interstitial Type Elements“. Advanced Materials Research 409 (November 2011): 321–26. http://dx.doi.org/10.4028/www.scientific.net/amr.409.321.

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The effect of a concomitant doping of interstitial type elements boron (B) and carbon (C), and boron (B) and nitrogen (N) on tensile properties of a Ni3(Si,Ti) intermetallic alloy was investigated in the temperature range between room temperature and 973 K. It was found that the concomitant doping of (C/B) and (N/B) remarkably improved the intermediate-temperature tensile elongation of the Ni3(Si,Ti) alloy compared with the simple doping of B or C. It was also shown that the fracture surface of the alloy doped with (C/B) and (N/B) exhibited the ductile transgranular fracture mode while that of the alloy doped with only B showed a brittle intergranular fracture mode at 773 K. These results clearly indicate that the concomitant doping of the interstitial type elements are useful for improving the intermediate-temperature tensile ductility of the Ni3(Si,Ti) alloy.

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Xiao, Qi, und Chi Yao. „Visible Light Photocatalytic Activity of C, N, S-Tridoped Anatase TiO₂ Nanosheets“. Advanced Materials Research 391-392 (Dezember 2011): 1117–22. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1117.

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The C, N, S-tridoped TiO2nanosheets are synthesized via hydrothermal synthesis and post-treatment, and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and UV–vis diffuse reflectance spectroscopy. The UV-diffuse reflectance spectra of all the C, N, S-tridoped TiO2nanosheets greatly extends the absorption edge into the visible light region, which can be attributed to C, N, S-tridoping in the form of cation C-doping, interstitial N-doping, anionic S-doping, and adsorbed SO42-ions states. The C, N, S-tridoped TiO2nanosheets exhibits high visible light photocatalytic activity, and the xanthate concentration reduce as much as 100% in 120 min. All these indicate that C, N, S-tridoped TiO2nanosheets photocatalysts are promising visible light photocatalyst for the practical application.

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Kurokawa, Mao, Takao Shimizu, Mutsuo Uehara, Atsuo Katagiri, Kensuke Akiyama, Masaaki Matsushima, Hiroshi Uchida, Yoshisato Kimura und Hiroshi Funakubo. „Control ofp- andn-type Conduction in Thermoelectric Non-doped Mg2Si Thin Films Prepared by Sputtering Method“. MRS Advances 3, Nr. 24 (2018): 1355–59. http://dx.doi.org/10.1557/adv.2018.150.

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ABSTRACTA method for controlling the conduction-type in Mg2Si films without doping is investigated. Mg2Si films exhibit p-type conduction after a post-heat treatment up to 500 °C in atmospheric He. However, covering the films with Mg ribbon during a subsequent heat treatment at 500 °C converts the conduction to n-type, demonstrating that the heat treatment atmosphere can control the conduction type. Based on the reported first principles calculations suggesting that interstitial Mg and Mg vacancies in Mg2Si are the origins of n-type and p-type conduction, respectively, the post-heat treatment in He induces Mg vacancies due to the evaporation of Mg from the film, resulting in p-type conduction. The subsequent heat treatment when the film is covered with Mg ribbon fills the Mg vacancies and the additional interstitial Mg is incorporated, resulting in n-type conduction. These observations differ from the reported data for heat treatment of stable n-type conduction in non-doped Mg2Si-sintered bodies and may realize a novel control method for the conduction type in Mg2Si films.

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Böhm, Michael C., Thomas Schedel-Niedrig, Hartmut Werner, Robert Schlögl, Joachim Schulte und Johannes Schütt. „Electronic Structure of the C60 Fragment in Alkali- and Alkaline-earth-doped Fullerides“. Zeitschrift für Naturforschung A 51, Nr. 4 (01.04.1996): 283–98. http://dx.doi.org/10.1515/zna-1996-0408.

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Abstract The electronic structure of the C50 fragment in alkali-and alkaline-earth-doped fullerides is studied theoretically. With increasing metal-to-C 60 charge transfer (CT) the n electronic properties of the soccerball are changed. In the undoped solid and for not too high a concentration of doping atoms the hexagon-hexagon (6-6) bonds show sizeable double bond character while the hexagon-pentagon (6-5) bonds are essentially of single bond type. In systems with a high concentration of doping atoms this relative ordering is changed. Now the 6-5 bonds have partial double bond character and the 6-6 bonds are essentially single bonds. The high ability of the C 60 unit to accomodate excess electrons prevents any sizeable weakening of the overall n bonding in systems with up to 12 excess electrons on the soccerball. A crystal orbital (CO) formalism on the basis of an INDO (intermediate neglect of differential overlap) Hamiltonian has been employed to derive solid state results for potassium-and barium-doped C 60 fullerides. For both types of doping atoms an incomplete metal-to-C 60 CT is predicted. In the potassium-doped fullerides the magnitude of the CT depends on the interstitial site of the dopant. The solid state data have been supplemented by INDO and ab initio calculations on molecular C 60 , and C^, 2 , -. The calculated bondlength alternation in the neutral molecule is changed in C 6 ö~ where the length of the 6-6 bonds exceeds the length of the 6-5 bonds. The geometries of the three molecular species have been optimized with a 3-21 G* basis. The theoretically derived modification of the C 60 (7r) electronic structure as a function of the electron count is explained microscopically in the framework of two quantum statistics accessible for n electronic ensembles. In the 7r ensemble of the C W) fragment so-called hard core bosonic properties are maximized where the Pauli antisymmetry principle has the character of a hidden variable only. Here the electronic degrees of freedom are attenuated only by the Pauli exclusion principle. This behaviour leads to the changes in the ir electronic structure mentioned above.

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Lin, Licheng, Deen Gu, Yonghai Ma, Yatao Li und Kai Yuan. „Facile Preparation of N/F Co-Doped Mesoporous TiO2 vis-Photocatalyst based on a Bi-Functional Template“. Nano 15, Nr. 11 (November 2020): 2050144. http://dx.doi.org/10.1142/s1793292020501441.

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Developing nonmetal-doped mesoporous TiO2 is highly attractive for preparing semiconductor visible photocatalyst with high activities. Here, we prepare N/F co-doped mesoporous TiO2 with high vis-photocatalytic activities by a simple liquid phase deposition process followed by annealing in air using C[Formula: see text]TAB as a bi-functional template (forming mesoporous and providing dopants). N2 adsorption isotherms, low-angle X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicate the formation of wormhole-like mesoporous structure. Wide-angle XRD and high-resolution TEM demonstrate the presence of anatase TiO2 mesopore wall. XPS analyses reveal that N is doped into TiO2 lattice in the forms of substitutional and interstitial N species, and that F is doped into the TiO2 lattice in the form of interstitial F. The mesopore-forming and doping mechanisms are thoroughly discussed based on the bi-function of C[Formula: see text]TAB template. Mesoporous structure results in a high BET surface area of TiO2. High-concentration nitrogen species in anatase lattice and mesoporous structure remarkably increase the visible absorption of TiO2. As a result, the reaction rate constant of MB degradation catalyzed by N/F co-doped mesoporous TiO2 photocatalysts is about 7 times that by P25.

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Lin, Yu-Hao, Chih-Huang Weng, Arun Lal Srivastav, Yao-Tung Lin und Jing-Hua Tzeng. „Facile Synthesis and Characterization of N-Doped TiO2Photocatalyst and Its Visible-Light Activity for Photo-Oxidation of Ethylene“. Journal of Nanomaterials 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/807394.

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A facile wet chemical method was adopted for preparing highly photoactive nitrogen doped TiO2(N-TiO2) powders with visible responsive capability, which could be achieved by the hydrolysis of titanium isopropoxide (TTIP) in the ammonium hydroxide precursor solution in various concentrations and then calcined at different temperatures. The N-TiO2powders were characterized, and the photocatalytic activity was evaluated for the photocatalytic oxidation of ethylene gas under visible light irradiation to optimize the synthesizing conditions of N-TiO2catalyst. The N-TiO2photocatalytic powders were calcined in a range of temperatures from 300 to 600°C and obviously found to have greater photocatalytic activities than commercial TiO2P25. The strong absorption in the visible light region could be ascribed to good crystallization and adapted sinter temperature of as prepared sample. XPS test demonstrated that the N was doped into TiO2lattice and made an interstitial formation (Ti-O-N), and N doping also retarded the phase transformation from anatase to rutile as well. The N-TiO2catalyst prepared with 150 mL ammonium hydroxide added and calcined at 500°C showed the best photocatalytic activity. The experimental results also proved the enhanced photoactivity of N-TiO2material depends on the synthesizing conditions.

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Shi, Jingming, Yu Lei, Naoyuki Hashimoto und Shigehito Isobe. „Doping of Interstitials (H, He, C, N) in CrCoFeNi High Entropy Alloy: A DFT Study“. MATERIALS TRANSACTIONS 61, Nr. 4 (01.04.2020): 616–21. http://dx.doi.org/10.2320/matertrans.mt-mk2019009.

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Lin, Yao-Tung, Chih-Huang Weng, Hui-Jan Hsu, Yu-Hao Lin und Ching-Chang Shiesh. „The Synergistic Effect of Nitrogen Dopant and Calcination Temperature on the Visible-Light-Induced Photoactivity of N-Doped TiO2“. International Journal of Photoenergy 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/268723.

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The synergistic effect of nitrogen content and calcinations temperature on the N-doped TiO2catalysts prepared by sol-gel method was investigated. The phase and structure, chemical state, optical properties, and surface area/pore distribution of N-doped TiO2were characterized using X-ray diffraction spectrometer, high-resolution transmission electron microscope, X-ray photoelectron spectroscopy, UV-vis diffusion reflectance spectroscopy, and Brunauer-Emmett-Teller specific surface area. Finding showed that the photocatalytic activity of N-doped TiO2was greatly enhanced compared to pure TiO2under visible irradiation. N dopants could retard the transformation from anatase to rutile phase. Namely, N-doping effect is attributed to the anatase phase stabilization. The results showed nitrogen atoms were incorporated into the interstitial positions of the TiO2lattice. Ethylene was used to evaluate the photocatalytic activity of samples under visible-light illumination. The results suggested good anatase crystallization, smaller particle size, and larger surface are beneficial for photocatalytic activity of N-doped TiO2. The N-doped TiO2catalyst prepared with ammonia to titanium isopropoxide molar ratio of 2.0 and calcinated at 400°C showed the best photocatalytic ability.

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Gertsriken, D. S., V. F. Mazanko, D. V. Mironov und S. Ye Bogdanov. „Formation of introduction solid solutions and phases under the conditions of ion bombardment of metals in the glow discharge“. Metaloznavstvo ta obrobka metalìv 98, Nr. 2 (07.06.2021): 3–13. http://dx.doi.org/10.15407/mom2021.02.003.

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Regularities of interaction of iron, steels, nickel, copper, titanium with light elements and inert gases in the plasma of the glow discharge studied by methods based on the use of radioactive indicators 55Fe, 44Ti, 14C, 13N, 85Kr, 41Ar (layer-by-layer radiometric analysis of residual integrated activity, macro- and microautoradiography, activation autoradiography), as well as metallography, X-ray analysis and spectral analysis. Processing was carried out according to the diode circuit with parameters of 1 - 55 hours, 0.2 - 2 kV, ~ 500 K. Neutral (argon, krypton) and saturating (nitrogen, ammonia, methane) media were used for processing in the discharge, and further processing of metals previously saturated with nitrogen or carbon was carried out in a neutral medium. It is established that in the process of introduction into metals (Fe, Ti) under the action of a glow discharge burning in a saturating medium, atoms soluble under equilibrium conditions of elements (N, C), there are interstitial solutions and phases that differ from those formed in isothermal annealing, only the presence of supersaturated solid solutions and some violation of the stoichiometry of carbides and nitrides, as well as a steeper decrease in the concentration of the alloying impurity with increasing distance from the surface. The shape of the concentration profiles outside the layer of the interstitial phase is described by an exponential dependence on the square of the penetration depth. As for the penetration into copper of nitrogen, carbon, argon or krypton atoms, insoluble under equilibrium conditions, in ion bombardment in appropriate media from the treated surface to the end of the diffusion zone there is only a solid solution with a concentration that decreases by the exponent. It turned out that further treatment of nickel, iron and steel saturated with light elements by argon and krypton ion bombardment leads to redistribution of alloying impurities, separation of interstitial phases mainly at grain boundaries, surface or at some distance from the surface, which contributes to some disturbance of concentration profile. When processing pre-saturated copper interstitial phases do not occur, but the type of profile changes dramatically, but from the maximum to the end of the diffusion zone is described by the exponent. It is shown that the use of saturating and neutral media, as well as their sequential application for processing in the glow discharge makes it possible to create predetermined doping profiles and enter the required amount of doping impurity. Keywords: glow discharge, radioactive isotopes, light elements, inert gases, diffusion, formation of phases and solid solutions.

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Mehr Quellen

Dissertationen zum Thema "Interstitial doping of C and N"

Papež, Pavel. „Počítačové modelování slitin s vysokou entropií“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442746.

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This Master’s thesis is focused on theoretical study of the high entropy alloy CoCrNi using ab initio calculations. The focus was on the effect of short range order on the relative stability of FCC and HCP structures and the value of stacking fault energy.The results show increase of stability in both types of structures wtih decreasing number of Cr-Cr nearest neighbours. The effect of the number of Cr-Cr nearest neighbours on the stacking fault energy previously shown in literature was not observed. However the strong dependency was found on the change of short range order caused by the shift of (1 1 1) planes after the transformation from the FCC to HCP structure. The effect of interstitial atoms C a N was also studied. Both these interstitials stabilise FCC structure and thus cause the increase of stacking fault energy. Both interstitials prefer octahedral positions with higher amount of Cr in their nearest neighbour shell.

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HINOJOSA, PAOLA ALEXANDRA AYALA. „IMPLICATIONS OF THE C/N FEEDSTOCK ON CONTROLLING THE NITROGEN DOPING AND BONDING ENVIRONMENT IN CARBON NANOTUBES“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10399@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Os tópicos mais importantes a ser tratados nesta tese de doutorado são os vários problemas envolvidos na síntese de nanotubos contendo nitrogênio. Isto é principalmente motivado pelas possíveis aplicações que podem ser dadas a este tipo de estruturas. A motivação central está relacionada ao fato da possibilidade de fazer dopagens tipo -p e -n em nanotubos de carbono, incorporando átomos como boro ou nitrogênio. Isto está muito longe de ser uma trivialidade devido a que devemos levar em conta que se os nanotubos de carbono forem pensados como bases estruturais para nanocompósitos e dispositivos nanoeletronicos, é necessário controlar cuidadosamente a reatividade das paredes, sua dureza mecânica e o gap eletrônico por meio de um controle da quantidade de átomos inseridos nas paredes ou entre elas. Portanto, do ponto de vista de diferentes aplicações, é importante ter a possibilidade de dopar controladamente os nanotubos. Neste trabalho apresentam-se o quadro descritivo da dependência dos parâmetros de síntese, assim como uma investigação detalhada da formação de outras estruturas co-produto do processo de formação de nanotubos. Como uma idéia pioneira proposta neste trabalho, é enfatizado o uso de fontes puras de C/N em processos de síntese baseados em deposição química na fase de vapor. Desta maneira foi possivel determinar os efeitos da atmosfera de reação e o pretratamento do catalizador como agentes favoráveis ou desfavoráveis para a síntese efetiva de nanotubos de carbono.
The main topic of this thesis is the study of various issues related to the synthesis of nitrogen containing nanotubes. This is mainly inspired in the possible applications such structures can have. The practical background lies in the fact that defined n- and p-doping of carbon nanotubes can be achieved by substituting carbon atoms from the tube walls by heteroatoms such as boron or nitrogen (N). This is far from been a triviality because we must keep in mind that if carbon nanotubes are to be used as future building blocks in nanocomposites and nanoelectronic devices, it is imperative to fine tune their wall reactivity, mechanical strength and electronic band gap by controlling the amount of foreign atoms inserted into the tube lattices. Therefore, from an applications standpoint, it is important to be able to carefully control the insertion of different dopants into nanotubes. In this work, a complete picture of the dependence on the combined synthesis parameters is established and a fundamental insight into the formation of N doped nanotubes and other structures (co- products) is provided. As a pioneering idea of this whole work, the use of pure C/N feedstocks in chemical vapor deposition methods is emphasized. With this, it was possible to determine the effects of the reaction atmosphere and the catalyst pretreatment as either favoring or disfavoring agents towards the synthesis of N-doped nanotubes.

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Shen, Jingyi. „Density functional theory study on the interstitial chemical shifts of main-group-element centered hexazirconium halide clusters; synthetic control of speciation in [(Zr6ZCl12)] (Z = B, C)-based mixed ligand complexes“. Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/2444.

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The correlation between NMR chemical shifts of interstitial atoms and electronic structures of boron- and carbon-centered hexazirconium halide clusters was investigated by density functional theory (DFT) calculation. The influences of bridging halide and terminal ligand variations on electronic structure were examined respectively. Inverse proportionality was found between the chemical shifts and the calculated energy gaps between two Kohn-Sham orbitals of t1u symmetry, which arose from the bonding and antibonding interaction between the zirconium cage bonding orbitals and the interstitial 2p orbitals. Chemical shielding properties of the interstitial atoms were calculated with Gauge Including Atomic Orbital (GIAO) method. Stepwise ligand substitution of terminal chlorides on [(Zr6CCl12)Cl6]4-cluster by tri(n-butyl)-phosphine oxide (Bu3PO) was conducted with the aid of TlPF6. Composition of the reaction mixtures was analyzed by use of both 13C and 31P NMR. A preliminary scheme for synthesis and separation of [(Zr6CCl12)Cl6-x(Bu3PO)x]x-4 (x = 3 ?? 5) mixture based on solubility difference was reevaluated. Three 1,10-phenanthroline based bidentate ligands, namely, 2,9-Bis(diphenyl-phosphinyl)-1,10-phenanthroline, 2,9-Bis(diethoxyphosphoryl)-1,10-phenanthroline, and 2,9-Bis(di-n-butoxyphosphoryl)-1,10-phenantholine, were synthesized for bridge-chelating the hexazirconium clusters. Coordination chemistry of these ligands with the [Zr6BCl12] and [Zr6CCl12] clusters was subject to preliminary investigation.

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Tomey, Lopez Estanislao Pablo. „Contribution à l'étude des propriétés structurales et magnétiques des composés intermétalliques de terre rare RFe10,5Mo1,5 : effets des éléments interstitiels H, C et N“. Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10245.

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La stabilisation de la structure cristalline thmn#1#2 dans les alliages r(fe-m')#1#2 exige une reduction de la densite d'electrons de valence par rapport a celle apportee par 12 atomes de fer. Ceci est fait en substituant le fer par le molybdene. L'insertion des atomes interstitiels tels que z=h, c et n dans les alliages rfe#1#0#,#5mo#1#,#5 provoque des modifications importantes de leurs proprietes physiques. Si pour les alliages, la taille de l'element r se manifeste dans l'evolution du parametre a de la maille elementaire, au fur et a mesure du remplissage du site interstitiel c'est le parametre c qui traduit la variation de taille de l'element r. La temperature d'ordre des alliages et le moment magntique moyen du fer augmentent apres l'insertion de z. Les contributions a l'anisotropie magnetocristalline de l'element r et du fer sont fortement modifiees par la presence de z. En particulier, avec l'azote ou le carbone les deux contributions sont completement changees en signe et amplitude. L'etude par diffraction neutronique sur poudre a permis d'une part, de localiser l'hydrogene et d'autre part, de suivre l'evolution de la hierarchie des moments magnetiques pour les differents sous-reseaux de fer. Des effets magnetoelastiques notables accompagnent la reorientation de spin dans l'alliage ou r=dy. La justification d'une configuration ferro ou ferrimagnetique oblique, requiert une reduction de symetrie selon l'analyse des representations. Une methode numerique a ete mise au point afin de reproduire les courbes d'aimantation mesures sur poudre orientee tout en tenant compte du degre de desorientation des cristallites, pour une bonne determination des constantes d'anisotropie k#1 et k#2. Les courbes d'aimantation mesurees sur monocristal de dyfe#1#0#,#5mo#1#,#5 ont ete reproduites par un calcul auto-coherent selon un modele d'interaction d'echange et de champ cristallin. On en deduit un ensemble de parametres de champ cristallin a#m#1 qui permettent de reproduire de facon raisonnable les phases magnetiques stables a basse temperature pour la serie des alliages

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Buchteile zum Thema "Interstitial doping of C and N"

Kapusta, Cz, und P. C. Riedi. „NMR Studies of Intermetallics and Interstitial Solutions Containing H, C and N“. In Interstitial Intermetallic Alloys, 497–520. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0295-7_20.

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Rubio, Angel. „Electronic and Doping Properties of B x C y N z Nanotubes“. In Nanowires, 133–42. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-015-8837-9_9.

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Desimoni, J. „Arrangements of Interstitial Atoms in fcc Fe—C and Fe—N Solid Solutions“. In ICAME 2003, 505–21. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2852-6_75.

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Aziz, A., O. Bonnaud, H. Lhermite, Y. Colin und A. Leglaunec. „Lateral Polysilicon n+p Diodes: Effect of the Grain Boundaries and of the p-Implanted Doping Level on the I-V and C-V Characteristics“. In Springer Proceedings in Physics, 318–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76385-4_45.

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Pivac, B., A. Sassella und A. Borghesi. „Non-doping light impurities in silicon for solar cells“. In C,H,N and O in Si and Characterization and Simulation of Materials and Processes, 55–62. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82413-4.50018-4.

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Gorelkinskii, Yu V., und N. N. Nevinnyi. „EPR of interstitial hydrogen in silicon: Uniaxial stress experiments“. In C,H,N and O in Si and Characterization and Simulation of Materials and Processes, 133–37. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82413-4.50035-4.

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Tomm, Y., L. Ivaneko, K. Irmscher, St Brehme, W. Henrion, I. Sieber und H. Lange. „Effects of doping on the electronic properties of semiconducting iron disilicide“. In C,H,N and O in Si and Characterization and Simulation of Materials and Processes, 215–18. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82413-4.50112-8.

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Simoen, E., J. P. Dubuc, J. Vanhellemont und C. Claeys. „Impact of the starting interstitial oxygen concentration on the electrical characteristics of electron irradiated Si junction diodes“. In C,H,N and O in Si and Characterization and Simulation of Materials and Processes, 179–82. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82413-4.50046-9.

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Konferenzberichte zum Thema "Interstitial doping of C and N"

Harashima, Y., K. Terakura, H. Kino, S. Ishibashi und T. Miyake. „Electron theory of interstitial dopant dependence of magnetic properties in NdFe11TiX (X= B, C, N, O, F)“. In 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7157023.

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Rani, Priti, Jyoti Thakur, Ankur Taya und Manish K. Kashyap. „Effect of tetragonal distortion induced by interstitial C-doping in L10-FeNi“. In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113336.

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O’Hayre, Ryan, Yingke Zhou, Robert Pasquarelli, Joe Berry und David Ginley. „Enhancement of Pt-Based Catalysts via N-Doped Carbon Supports“. In ASME 2008 3rd Energy Nanotechnology International Conference collocated with the Heat Transfer, Fluids Engineering, and Energy Sustainability Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/enic2008-53078.

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This study experimentally examines the enhancement of carbon supported Pt-based catalysts systems via nitrogen doping. It has been reported that nitrogen-containing carbons promote significant enhancement in Pt/C catalyst activity and durability with respect to the methanol oxidation and oxygen reduction reactions. In order to systematically investigate the effect of N-doping, in this work we have developed geometrically well-defined model catalytic systems consisting of tunable assemblies of Pt catalyst nanoparticles deposited onto both N-doped and undoped highly-oriented pyrolytic graphite (HOPG) substrates. N-doping was achieved via ion beam implantation, and Pt was electrodeposited from solutions of H2PtCl6 in aqueous HClO4. Morphology from scanning electron microscopy (SEM) and catalytic activity measurement from aqueous electrochemical analysis were utilized to examine the N-doping effects. The results strongly support the theory that doping nitrogen into a graphite support significantly affects both the morphology and behavior of the overlying Pt nanoparticles. In particular, nitrogen-doping was observed to cause a significant decrease in the average Pt nanoparticle size, an increase in the Pt nanoparticle dispersion, and a significant increase in catalytic activity for both methanol oxidation and oxygen reduction.

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Mizutani, N., S. Sakiyama und K. Fujita. „Controllable n- to p-type Doping of MEH-PPV Films by Evaporative Spray Deposition using Ultra-Dilute Solution Method“. In 2015 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2015. http://dx.doi.org/10.7567/ssdm.2015.c-4-2.

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Kuznetsov, Mikhail G., Alexander A. Kokin und Sergey A. Kokin. „C-V model of the MOS structures with a shallow p-n junction for the electro-physical parameters and profile of the doping determination“. In Microelectronic Manufacturing '95, herausgegeben von Ih-Chin Chen, Girish A. Dixit, Trung T. Doan und Nobuo Sasaki. SPIE, 1995. http://dx.doi.org/10.1117/12.221124.

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Zhou, Yingke, Robert Pasquarelli, Joe Berry, David Ginley und Ryan O’Hayre. „Improving PEM Fuel Cell Catalysts Using Nitrogen-Doped Carbon Supports“. In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65172.

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This study experimentally examines the effect of nitrogen doping on the activity of Pt/C catalyst systems. The investigation was accomplished through the development of geometrically well-defined model catalytic systems consisting of tunable assemblies of Pt catalyst nanoparticles deposited onto both N-doped and undoped highly-oriented pyrolytic graphite (HOPG) substrates. N-doping was achieved via ion beam implantation, and Pt was electrodeposited from solutions of H2PtCl6 in aqueous HClO4. Morphology from scanning electron microscopy (SEM) and catalytic activity measurement from aqueous electrochemical analysis were utilized to examine the N-doping effects. The results strongly support the theory that doping nitrogen into a graphite support significantly affects both the morphology and behavior of the overlying Pt nanoparticles. In particular, nitrogen-doping was observed to cause a significant decrease in the average Pt nanoparticle size, an increase in the Pt nanoparticle dispersion, and a significant increase in catalytic activity for both methanol oxidation and oxygen reduction.

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Ding, Cong, Yufei Zhang, Chen Chuan und Yanhua Liu. „Preparation and Photocatalysis of a Glass Coated With Nanometer TiO2 Codoped With N, F and Fe Elements“. In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6424.

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Indoor air pollution seriously threats the life and health of human beings. The improvement of indoor air quality has become a focus that people pay more and more attentions to. The photocatalytic of pollutants based on TiO2 is a promising air purification technology. In order to overcome the disadvantages of nanometer powder TiO2 catalyst and to enhance the photocatalytic activity of TiO2, series of glass plates covered with doped-TiO2 were prepared and the photocatalysis them were studied. The glass plates covered with TiO2 which was doped in advance with N, F, or/and Fe were prepared by a sol-gel method. The doping content of N, F, Fe and heat treatment temperature were determined using the orthogonal array of the Taguchi quality design. The prepared gel was coated on the glass by spin-coating method. The effects of doping level of N, F and Fe and heat treatment temperature on the photocatalytic capabilities were investigated. The photocatalytic capabilities of prepared glass plates were investigated by degrading the solution of methylene blue (MB,C16H18ClN3S). The results show that appropriate addition of N, F and Fe and temperaturae are effective for improving the photocatalytic activities of TiO2 under visible light. The optimal TiO2 was prepared under the condition that the doping amount of F element was 9at %, that of N is 7at %, and none of Fe under 400 °C calcination temperature. The degradation rate of the sample for methylene blue solution reaches 23.49% under visible light irradiation for 5 hours. The influence order of the factors was the calcination temperature > F > N > Fe.

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Iyer, D., A. Messinger, R. Crowder, Y. Zhang, O. Amster, S. Friedman, Y. Yang und F. Stanke. „Measurement of Dielectric Constant and Doping Concentration of a Cross-Sectioned Device by Quantitative Scanning Microwave Impedance Microscopy“. In ISTFA 2017. ASM International, 2017. http://dx.doi.org/10.31399/asm.cp.istfa2017p0613.

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Abstract Scanning microwave impedance microscopy (sMIM) is an emerging technique that can provide detailed information beyond that of conventional scanning capacitance microscopy (SCM), and other electrical scanning probe microscopy (SPM) techniques, for the investigation and failure analysis (FA) of semiconductor devices. Integration of new dielectric materials at lower levels of the device structure with the need for quantification of dielectric and dopants in semiconductor devices with sub-micron spatial resolution pushes the practical boundaries of typical atomic force microscopy (AFM) electrical modes. sMIM can measure both linear and non-linear materials (insulators and doped semiconductors, respectively) simultaneously. sMIM has a linear response to log k (dielectric number) and log N (doping concentration) making it an ideal method for providing quantitative measurements of semiconductor devices over a large range of values. This work demonstrates an example of a practical application of sMIM for quantitative measurement of the dopant concentration profile in production semiconductor devices. A planar dopant calibration sample is used to calibrate the sMIM prior to performing the measurements on an “unknown” production device. We utilize nanoscale C-V data to establish a calibration curve for both n- and p-type carriers and apply the calibration curve to an “unknown” device, presenting the measurements in units of doping concentration.

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Lin, Hsiu-Li, Chih-Ren Hu, Po-Hao Su, Yu-Cheng Chou und Che-Yu Lin. „Proton Exchange Membranes Based on Blends of Poly(Benzimidazole) and Butylsulfonated Poly(Beznimidazole) for High Temperature PEMFC“. In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33031.

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Phosphoric acid doped poly(benzimidazole) (PBI) is one of excellent candidates of proton exchange membranes for high temperature (150–180°C) proton exchange membrane fuel cells (PEMFCs). However, the strong inter-polymer hydrogen bonds cause low elongation and brittleness of PBI membranes. In this work, we synthesize poly(benzimidazole) (PBI) and butylsulfonated poly(benzimidazole) (PBI-BS), in which around 22 mole% of imidazole –NH groups of PBI are grafted with sulfonated butyl groups. We show the elongation, phosphoric acid doping level, and proton conductivity of PBI can be improved by blending ∼ 20 wt% of PBI-BS in the PBI membrane, and the membrane electrode assembly prepared from PBI/PBI-BS (8/2 by wt) blend membrane has a better PEMFC performance at 140°C ∼ 180°C than that prepared from PBI membrane. It is believed that the crosslink interactions of imidazole -NH and -N=C-groups with side chain –C4H8−SO3H groups of PBI-BS reduces the inter-PBI hydrogen bonds and increases the free volume of polymers, which leads to the enhancements of the membrane toughness and phosphoric acid doping level and the PEMFC performance.

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Chen, Guanying, Tianyu Zhao, Deyang Li und Yiyan Zhang. „CsPbBr₃ perovskite nanocrystal/S doping g-C₃N₄ ultra-thin nanosheet heterojunction with enhanced interfacial charge transfer for photocatalytic CO₂ reduction“. In 2nd International Online-Conference on Nanomaterials. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/iocn2020-07930.

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