Log in

Relevant bibliographies by topics / Titanium atoms

Contents

Journal articles
Dissertations / Theses
Book chapters
Conference papers
Reports

Academic literature on the topic 'Titanium atoms'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Titanium atoms.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Titanium atoms"

1

Schwarze, Bernd, Wolfgang Milius, and Wolfgang Schnick. "Synthese und Kristallstruktur von [(Cl3Si)2N]2TiCl2 -ein perchloriertes N-Silyl-titanamid /Synthesis and Crystal Structure of [(Cl3Si)2N]2TiCl2 -a Fully Chlorinated N-Silyl Titanium Amide." Zeitschrift für Naturforschung B 52, no. 7 (July 1, 1997): 819–22. http://dx.doi.org/10.1515/znb-1997-0710.

Full text

Abstract:

Abstract The chlorinated titanium amides [(Cl3Si)2N]2TiCl2 (1) and (Cl3Si)2NTiCl3 have been synthesized selectively from hexachlorodisilazane lithium and TiCl4. The crystal structure of 1 was determined by single crystal X-ray methods at room temperature (P212121, a = 1232.4(2), b = 1265.5(2), c -1469.1(2) pm, Z = 4). The central titanium atom of 1 is bound to two nitrogen atoms and two Cl atoms and is weakly coordinated further by two Cl atoms of the trichlorosilyl groups.

APA, Harvard, Vancouver, ISO, and other styles

2

Neumüller, Bernhard, Felora Heshmatpou, and Kurt Dehnicke. "Die Kristallstruktur von [(THF)2Li(μ2-Cl)2TiCl2(THF)2] / Crystal Structure of [(THF)2Li(μ2-Cl)2TiCl2(THF)2]." Zeitschrift für Naturforschung B 51, no. 4 (April 1, 1996): 602–4. http://dx.doi.org/10.1515/znb-1996-0427.

Full text

Abstract:

Abstract The crystal structure of the title com pound has been determined by X-ray methods. Space group C2/c, Z = 4, lattice dimensions at -80 °C: a = 1343.8(2), b = 1031.6(1), c = 1669.4(1) pm, β = 96.47(1)°. The compound forms an ion pair in which the lithium atom is coordinated in a distorted tetrahedral geometry by two THF molecules and by two chlorine atoms. The halide atoms have a μ2-bridging function, coordinating the lithium and the titanium center. The titanium atom possesses a distorted octahedral environment with two THF ligands in trans-position.

APA, Harvard, Vancouver, ISO, and other styles

3

Malič, Barbara, Iztok Arčon, Marija Kosec, and Alojz Kodre. "A structural study of amorphous alkoxide-derived lead titanium complexes." Journal of Materials Research 12, no. 10 (October 1997): 2602–11. http://dx.doi.org/10.1557/jmr.1997.0346.

Full text

Abstract:

We studied amorphous lead titanium alkoxide-derived heterometallic complexes, prepared from lead acetate and titanium n-propoxide or n-butoxide in parent alcohol medium. According to gas-liquid chromatography (GLC) and thermogravimetric analysis with mass spectrometry of evolved species (TGA/EGA) analyses, the type of alkoxide group influences oxo or acetate bridging, as well as the amounts of hydroxyl and organic groups bound to the metal network. From XANES and EXAFS analysis, local environments of lead and titanium atoms were determined within the analyzed range of 3.4 Å. Local environments depend weakly on the type of alkoxide used. Titanium atoms are pentacoordinated. A Pb–Ti correlation is established with lead atoms bound to titanium atoms by oxygen linkages.

APA, Harvard, Vancouver, ISO, and other styles

4

Lv, Yanan, and Dong Chen. "A molecular dynamics study of nanoscale titanium nitrides formation in ferrite." Modern Physics Letters B 34, no. 10 (January 31, 2020): 2050099. http://dx.doi.org/10.1142/s0217984920500992.

Full text

Abstract:

Molecular dynamics simulation was adopted to investigate the nanoscale titanium nitride formation at the early formation stage in high-strength low-alloy steel. During the cluster formation process, the nitride clusters were formed through the atom aggregation. The atomic interactions of titanium and nitride atoms were revealed and the cluster property was discussed. The nanoscale titanium nitride clusters own a wide composition, and the cluster formation mechanism was concluded.

APA, Harvard, Vancouver, ISO, and other styles

5

Willke, Philip, Yujeong Bae, Kai Yang, Jose L. Lado, Alejandro Ferrón, Taeyoung Choi, Arzhang Ardavan, Joaquín Fernández-Rossier, Andreas J. Heinrich, and Christopher P. Lutz. "Hyperfine interaction of individual atoms on a surface." Science 362, no. 6412 (October 18, 2018): 336–39. http://dx.doi.org/10.1126/science.aat7047.

Full text

Abstract:

Taking advantage of nuclear spins for electronic structure analysis, magnetic resonance imaging, and quantum devices hinges on knowledge and control of the surrounding atomic-scale environment. We measured and manipulated the hyperfine interaction of individual iron and titanium atoms placed on a magnesium oxide surface by using spin-polarized scanning tunneling microscopy in combination with single-atom electron spin resonance. Using atom manipulation to move single atoms, we found that the hyperfine interaction strongly depended on the binding configuration of the atom. We could extract atom- and position-dependent information about the electronic ground state, the state mixing with neighboring atoms, and properties of the nuclear spin. Thus, the hyperfine spectrum becomes a powerful probe of the chemical environment of individual atoms and nanostructures.

APA, Harvard, Vancouver, ISO, and other styles

6

Wollert, René, Sigrid Wocadlo, Kurt Dehnicke, Helmut Goesmann, and Dieter Fenske. "Die Kristallstrukturen von (PPh4)2[TiCl3(NSiMe3)]2 • CH3CN und (PPh4)2[TiCl4(OSPCl2)]2 / The Crystal Structures of (PPh4)2[TiCl3(NSiMe3)]2 · CH3CN and (PPh4)2[TiCl4(OSPCl2)]2." Zeitschrift für Naturforschung B 47, no. 10 (October 1, 1992): 1386–92. http://dx.doi.org/10.1515/znb-1992-1008.

Full text

Abstract:

(PPh4)2[TiCl3(NSiMe3)]2 · CH3CN has been prepared from [TiCl2NSiMe3)]∞ with PPh4Cl in acetonitrile solution as yellow crystals. The compound crystallizes in the triclinic space group P T with one formula unit per unit cell, 3447 observed unique reflections, R = 0.053. Lattice dimensions at 200 K: a = 1030(1), b = 1253(1), c = 1374(1) pm, α = 77.46(8)°, β = 73.93(8)°, γ = 69.99(9)°. The structure consists of PPh4+ ions and centrosymmetric dimeric anions [TiCl3(NSiMe3)]22-, in which pentacoordinate titanium atoms are associated via the nitrogen atoms of the silylimido groups.(PPh4)2[TiCl4(OSPCl2)]2 has been prepared by the reaction of PPh [OSPCl2] with titanium tetrachloride in CH2C12 solution as orange crystals. (Space group P1̄, Ζ = 1, 3242 observed unique reflections, R = 0.033). Lattice dimensions at 193 K: a = 1114.8(2), b = 1190.6(2), c = 1218.7(2) pm, α = 72.18(1)°, β = 85.45(1)°, γ = 69.19(1)°. The structure consists of PPh4+ ions and centrosymmetric dimeric anions [TiCl4(OSPCl2)]22-, in which hexacoordinate titanium atoms are associated via two chlorine atoms. The OSPCl2- group is coordinated via the oxygen atom.

APA, Harvard, Vancouver, ISO, and other styles

7

Marashdeh, Ali, Roar A. Olsen, Ole Martin Løvvik, and Geert-Jan Kroes. "NaAlH4Clusters with Two Titanium Atoms Added." Journal of Physical Chemistry C 111, no. 23 (June 2007): 8206–13. http://dx.doi.org/10.1021/jp067083b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Zhmurin, P. N., A. N. Letuchii, and D. A. Shono. "Velocity distribution of sputtered titanium atoms." Journal of Applied Spectroscopy 54, no. 2 (February 1991): 141–44. http://dx.doi.org/10.1007/bf00664753.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sung, Si Young, Myoung Gyun Kim, and Young Jig Kim. "Titanium and Titanium Alloy Castings for Biomedical Application." Key Engineering Materials 342-343 (July 2007): 617–20. http://dx.doi.org/10.4028/www.scientific.net/kem.342-343.617.

Full text

Abstract:

The aim of this study is to optimize the economic net-shape forming of titanium and titanium alloys for the biomedical application. The alpha-case formation reaction between titanium, and Al2O3, ZrO2, CaO stabilized ZrO2 and ZrSiO4 mold were examined in a plasma arc melting furnace. Regardless of the thermodynamic approach, α-case formation reactions still remain to be eliminated with the complex chemical milling processes. The reason why the α-case generated cannot be explained by the conventional α-case formation mechanism. However, from the experimental results and thermodynamic consideration, it can be confirmed that the α-case is formed not only by interstitial oxygen atoms but also by substitutional metal atoms dissolved from mold materials. Based on the interstitial and substitutional α-case formation mechanism, α-case controlled net-shape forming of titanium and titanium alloys can be possible for the biomedical application.

APA, Harvard, Vancouver, ISO, and other styles

10

Mguig, Basma, Monica Calatayud, and Christian Minot. "Theoretical Investigation of NO Oxidation over TiO2-Anatase." Surface Review and Letters 10, no. 02n03 (April 2003): 175–82. http://dx.doi.org/10.1142/s0218625x03005281.

Full text

Abstract:

We present periodic DFT calculations to study the NO adsorption on stoichiometric (100) and (001) TiO2-anatase surfaces. The adsorption on the Ti atoms, involving an oxidation of the substrate, is very weak. The adsorption on the O atoms, involving a reduction of the substrate, is possible when these atoms are in terminal position. Then, nitrite and nitrates can be formed. The adsorption energy for their formation on an oxygen-terminated slab model is ten times larger than the molecular NO adsorption on a titanium atom.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Titanium atoms"

1

Guan, Xingsheng. "Anelastic Effects Associated with Solute Atoms in Aluminum and Titanium Alloys." Kyoto University, 1998. http://hdl.handle.net/2433/182334.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Vural, Kivilcim Basak. "Adsorption Of Gold Atoms On Anatase Tio2 (100)-1x1 Surface." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610962/index.pdf.

Full text

Abstract:

In this work the electronic and structural properties of anatase TiO2 (100) surface and gold adsorption have been investigated by using the first-principles calculations based on density functional theory (DFT). TiO2 is a wide band-gap material and to this effects it finds numerous applications in technology such as, cleaning of water, self-cleaning, coating, solar cells and so on. Primarily, the relation between the surface energy of the anatase (100)-1x1 phase and the TiO2-layers is examined. After an appropriate atomic layer has been chosen according to the stationary state of the TiO2 slab, the adsorption behavior of the Au atom and in the different combinations are searched for both the surface and the surface which is supported by a single Au atom/atoms. It has been observed that a single Au atom tends to adsorb to the surface which has an impurity of Au atom or atoms. Although, the high metal concentration on the surface have increased the strength of the adsorption, it is indicated that the system gains a metallic property which is believed to cause problems in the applications. In addition, the gold clusters of the dimer (Au2) and the trimer (Au3) have been adsorbed on the surface and their behavior on the surface is investigate. It is observed that the interaction between Au atoms in the atomic cluster each other is stronger than that of gold clusters and the surface.

APA, Harvard, Vancouver, ISO, and other styles

3

Paget, Timothy John. "Bis(cyclopentadienyl)titanium(IV) derivatives of carboxylic acids containing additional donor atoms and their use as building blocks for heterobimetallic complexes." Thesis, University of Bath, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Grant, Ann W. "Surface studies of model catalysts using metal atoms and particles on ZnO(0001)-Zn and -O and TiO₂(110) /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8499.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Quichaud, Viviane. "Etude des processus elementaires : de synthese de la molecule no, en post-decharge en ecoulement, de collisions titane-gaz rares, titane-molecules, par perturbation laser resolue en temps." Paris 6, 1987. http://www.theses.fr/1987PA066135.

Full text

Abstract:

I. Etude de la preparation des etats excites de no dans un dispositif de post-decharge en ecoulement a partir de n::(2) excite (prepare par transfert d'excitation a partir d'atomes ar metastables dans une decharge basse pression) et de o (obtenu par dissociation de o::(2) dans une decharge de he). Observation d'une emission intense des bandes gamma de no, qui implique un etat a courte duree de vie (b) de n::(2) et le premier etat metastable de o. Ii. Analyse des processus d'extinction et de transfert d'excitation a partir d'etats a courte duree de vie de ti (crees dans un dispositif a cathode creuse) lors de collisions avec des gaz rares (ar, ne, he) et des molecules (n::(2),h::(2)). Ces experiences permettent l'etude de cinetiques de reactions elementaires au sein d'un plasma basse pression ensemence de vapeurs metalliques, a l'aide du dispositif de post-decharge en ecoulement

APA, Harvard, Vancouver, ISO, and other styles

6

Andersson, Kent. "Preparation and Characterisation of Sputtered Titanium- and Zirconium Nitride Optical Films." Licentiate thesis, Solid State Physics Group, Department of Technology, Uppsala University, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-4530.

Full text

Abstract:

Multilayered interference coatings based on titanium- and zirconium nitride and designed for solar control have been prepared using reactive d c magnetron sputtering. Preparation effects and degradation mechanisms were investigated. It was shown that the quality of the nitride strongly depends on the degree of crystallinity in the underlying oxide. It has been shown that the nitride layer partly oxidizes as the top oxide layer is deposited. The degradation is enhanced with temperature. A thin sacrificial layer of aluminium deposited between successive depositions of nitride and oxide is shown to improve the optical performance of the coating as preparedm as well as after accelerated ageing tests. The optical properties of opaque and semitransparent films of zirconium nitride have been studied. A thorough investigation of the influence of composition, deposition rate, substrate temperature and film thickness on the optical response of the film was performed. Both photometric and ellipsometric methods were used to determine thicknesses and the optical constants at wavelengths ranging from 0.23 to 25 μm. The resulting values of n and k, in the wavelength intervals where these independent methods are applicable, have been shown to agree extremely well. The results so far indicate an even larger potential for zirconium nitride based solar control coatings as compared to the titanium nitride based. Access to optical constants derived from films of zirconium nitride of variable quality made multilayer modelling a powerful tool in the design and analysis of solar control coatings.

APA, Harvard, Vancouver, ISO, and other styles

7

Cheerkapally, Raghavender P. "Surface-induced structural transformations in titanium nanowires." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384869599.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Samimi, Peyman. "Combinatorial Assessment of the Influence of Composition and Exposure Time on the Oxidation Behavior and Concurrent Oxygen-induced Phase Transformations of Binary Ti-x Systems." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801898/.

Full text

Abstract:

The relatively low oxidation resistance and subsequent surface embrittlement have often limited the use of titanium alloys in elevated temperature structural applications. Although extensive effort is spent to investigate the high temperature oxidation performance of titanium alloys, the studies are often constrained to complex technical titanium alloys and neither the mechanisms associated with evolution of the oxide scale nor the effect of oxygen ingress on the microstructure of the base metal are well-understood. In addition lack of systematic oxidation studies across a wider domain of the alloy composition has complicated the determination of composition-mechanism-property relationships. Clearly, it would be ideal to assess the influence of composition and exposure time on the oxidation resistance, independent of experimental variabilities regarding time, temperature and atmosphere as the potential source of error. Such studies might also provide a series of metrics (e.g., hardness, scale, etc) that could be interpreted together and related to the alloy composition. In this thesis a novel combinatorial approach was adopted whereby a series of compositionally graded specimens, (Ti-xMo, Ti-xCr, Ti-xAl and Ti-xW) were prepared using Laser Engineered Net Shaping (LENS™) technology and exposed to still-air at 650 °C. A suite of the state-of-the-art characterization techniques were employed to assess several aspects of the oxidation reaction as a function of local average composition including: the operating oxidation mechanisms; the structure and composition of the oxides; the oxide adherence and porosity; the thickness of the oxide layers; the depth of oxygen ingress; and microstructural evolution of the base material just below the surface but within the oxygen-enriched region. The results showed that for the Ti-Mo, Ti-Al and Ti-W systems a parabolic oxidation rate law is obeyed in the studied composition-time domain while Ti-Cr system experiences a rapid breakaway oxidation regime at low solute concentrations. The only titanium oxide phase present in the scale for all the binary systems was identified as rutile (TiO2) and formation of multiphase oxide scales TiO2+Al2O3 in Ti-Al system and TiO2+TiCr2 in Ti-Cr system was observed. A thermodynamic framework has been used to rationalize the oxygen-induced subsurface microstructural transformations including: homogeneous precipitation of nano-scaled β particles and discontinuous precipitation of +β phases in Ti-Mo and Ti-W system, evolution of TiCr2 intermetallic phase in Ti-Cr system and ordering phase transformation in Ti-Al system.

APA, Harvard, Vancouver, ISO, and other styles

9

Nguyen, Sorenson Anh Hoang Tu. "Immobilization of Copper Nanoparticles onto Various Supports Applications in Catalysis." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8892.

Full text

Abstract:

Copper-based materials are one of the most promising catalysts for performing transformations of important organic compounds in both academic and industrial operations. However, it is challenging to consistently synthesize highly active and stable copper species as heterogeneous catalysts due to their relatively high surface energy. As a result, agglomeration usually occurs, which limits the catalytic activities of the copper species. The work presented in this dissertation shows different synthetic strategies for obtaining active and stable copper-based materials by modifying chemical/physical properties of copper nanoparticles (NPs). Emphasis is placed on discussing specific catalytic systems, including carbon-supported catalysts (monometallic and bimetallic copper-based heterogeneous catalysts) and titania-supported catalysts, and their advantages in terms of catalytic performance. In recent years, there has been increasing interest in using metal-organic frameworks (MOFs) as a sacrificial template to obtain carbon-supported NPs via a thermolysis process. The advantages of using MOFs to prepare carbon supported nanomaterials are a fine distribution of active particles on carbon matrix without post-synthesis treatments and corresponding increased catalytic activity and stability in many reaction conditions. To better understand the potential of this synthetic approach, MOF pyrolyzed products have been characterized. Then, they were applied as heterogeneous catalysts for several chemical reactions. In particular, the high energy copper-based MOF, CuNbO-1, was decomposed to obtain an amorphous copper species supported on carbon (a-Cu@C). This catalyst was found to be highly active for reduction, oxidation, and N-arylation reactions without further tuning or optimization. Higher catalyst turnover numbers for each of these transformations were obtained when comparing a-Cu@C activity to that of similar Cu-based materials. To improve catalyst performance, a secondary metal can be introduced to create synergistic effects with the parent copper species. In order to gain insights into the role of the second metal, a well-known Cu-MOF, HKUST-1, was doped with nickel, cobalt, and silver solutions, followed by a decomposition process with 2,4,6-trinitrotoluene (TNT) as additive. This additive was used to enhance the rapid thermolysis of the bimetallic MOFs. In these bimetallic systems, the addition of a second metal was found to help in dispersing both metals over the carbon composite support and in influencing the particle size and oxidation state of the metals. Catalytic performance showed that even <1% of a secondary metal increased the rate for nitrophenol reduction. Optimal catalytic performance was achieved using a Ni-CuO@C bimetallic catalyst. Another synthetic strategy for Cu-catalyst preparation involves using the deposition-precipitation method, in which a copper catalyst anchored on a titania support was synthesized at low weight % in order to obtain a single atom catalyst (1-Cu/TiO2). The higher copper loading catalyst, 5-Cu/TiO2, was synthesized as a benchmark catalyst for comparison. The copper structure in the synthesized catalysts was investigated by powder X-ray diffraction (PXRD), Raman, scanning transmission electron microscopy-energy dispersive X-ray spectroscopy (STEM-EDX), X-ray photoelectron spectroscopy (XPS), N2 physisorption and inductively coupled plasma mass spectrometry (ICP-MS) in order to characterize physical and chemical properties. STEM-EDX observations showed single atom copper species less than 0.75 nm in size, as well as nanoparticles with an average diameter of ~1.31 nm. This catalyst was highly active in the reduction of nitro-aromatic compounds with NaBH4 at room temperature. The small to atomic level sizes of the Cu species and multiple oxidation states of Ti species were found to play a crucial role in the catalytic activity.

APA, Harvard, Vancouver, ISO, and other styles

10

Sjögren, Adam. "The impact of metallic cranial implants on proton-beam radiotherapy treatment plans for near implant located tumours : A phantom study on the physical effects and agreement between simulated treatment plans and the resulting treatment for near implant located cranial tumours." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149530.

Full text

Abstract:

Within the field of radiotherapy treatments of tumour diseases, the hunt for more accurate and effective treatment methods is a continuous process. For some years ion-beam based radiotherapy, especially the proton-beam based applications, has increased in popularity and availability. The main reason behind this is the fact that ion-beam based applications make it possible to modulate the dose after the planning target volume (PTV) defined by the radiation oncologist. This means that it becomes possible to spare tissue in another way, which might result in more effective treatments, especially in the vicinity of radio sensitive organs. Ion-beam based treatments are however more sensitive to uncertainties in PTV position and beam range as ion-beams have a fixed range depending on target media and initial energy, as opposed to the conventional x-ray beams that do not really have a defined range. Instead their intensity decreases exponentially at a rate dependent of the initial energy and target media. Therefore density heterogeneities result in uncertainties in the planned treatments. As the plans normally are created using a CT-images, for which metallic implants can yield increased heterogeneities both from the implants themselves and so called metal artifacts (distortions in the images caused by different processes as the X-rays used in image acquisition goes through metals). Metallic implants affects the accuracy of a treatment, and therefore also the related risks, so it is important to have an idea of the magnitude of the impact. Therefore the aim of this study is to estimate the impact on a proton-beam based treatment plan for six cranial implants. These were one Ti-mesh implant, one temporal plate implant, one burr-hole cover implant and three craniofix implants of different sizes, which all are commonly seen at the Skandion clinic. Also the ability of the treatment planning system (TPS), used at the clinic, to simulate the effects on the plans caused by the implants is to be studied. From this result it should be estimated if the margins and practices in place at the clinic, for when it is required to aim the beam through the implant, are sufficient or if they should be changed. This study consisted of one test on the range shift effects and one test on the lateral dose distribution changes, with one preparational test in the form of a calibration of Gafchromic EBT3 films. The range shift test was performed on three of the implants, excluding the three craniofix implants using a water phantom and a treatment plan created to represent a standard treatment in the cranial area. The lateral dose distribution change test was performed as a solid phantom study using radiochromic film, for two treatment plans (one where the PTV was located \SI{2}{\centi\metre} below surface, for all implants, and one where it was located at the surface, only for the Ti-mesh and the temporal plate). The results of both tests were compared to simulations performed in the Eclipse treatment planing system (TPS) available at Skandion. The result of the range shift test showed a maximum range shift of \SI{-1.03 +- 0.01}{\milli\metre}, for the burr-hole cover implant, and as the related Eclipse simulations showed a maximal shift of \SI{-0.17 +- 0.01}{\milli\metre} there was a clear problem with the simulation. However, this might not be because of the TPS but due to errors in the CT-image reconstruction, such as, for example, geometrical errors in the representation of the implants. As the margin applied for a similar situation at the Skandion clinic (in order to correct for several uncertainty factors) is \SI{4.2}{\milli\metre} there might be a need to increase this margin depending on the situation. For the lateral distribution effects no definite results were found as the change varied in magnitude, even if it tended to manifest as a decreasing dose for the first plan and a increasing dose for the second. It was therefore concluded that further studies are needed before anything clear can be said.

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Titanium atoms"

1

Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "103 Cl4Ti Titanium tetrachloride." In Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms, 134. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-540-70614-4_104.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "196 O2Ti Titanium dioxide." In Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms, 227. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-540-70614-4_197.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Konieczny, Robert, Rafał Idczak, and Jan Chojcan. "Mössbauer studies of interactions between titanium atoms dissolved in iron." In ISIAME 2012, 439–45. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-6491-0_64.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Atkins, Peter. "A Preliminary Remark: Water and Friends." In Reactions. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199695126.003.0004.

Full text

Abstract:

Water is the most miraculous of fluids. As well as being ubiquitous on Earth and essential for life as we know it, it has remarkable properties which at first sight don’t seem to be consistent with its almost laughably simple chemical composition. Each molecule of water consists of a single oxygen atom (O) and two hydrogen atoms (H); its chemical formula is therefore, as just about everyone already knows, H2O. Here is one odd but hugely important anomalous property. A water molecule is only slightly heavier than a methane molecule (CH4; C denotes a carbon atom) and an ammonia molecule (NH3, N denotes a nitrogen atom). However, whereas methane and ammonia are gases, water is a liquid at room temperature. Water is also nearly unique in so far as its solid form, ice, is less dense than its liquid form, so ice floats on water. Icebergs float in water; methanebergs and ammoniabergs would both sink in their respective liquids in an extraterrestrial alien world, rendering their Titanics but not their Nautiluses safer than ours. Another very important property is that water is an excellent solvent, being able to dissolve gases and many solids. One consequence of this ability is that water is a common medium for chemical reactions. Once substances are dissolved in it, their molecules can move reasonably freely, meet other dissolved substances, and react with them. As a result, water will figure large in this book and this preliminary comment is important for understanding what is to come. You need to get to know the H2O molecule intimately, for from it spring all the properties that make water so miraculous and, more prosaically, so useful. The molecule also figures frequently in the illustrations, usually looking like 1, where the red sphere denotes an O atom and the pale grey spheres represent H atoms. Actual molecules are not coloured and are not made up of discrete spheres; maybe 2 is a better depiction, but it is less informative. I shall use the latter representation only when I want to draw your attention to the way that electrons spread over the atoms and bind them together.

APA, Harvard, Vancouver, ISO, and other styles

5

Le Noc, L., C. Cartier dit Moulin, S. Solomykina, D. Trong On, C. Lortie, S. Lessard, and L. Bonneviot. "Determination of the environment of titanium atoms in TS-1 silicalite by Ti K-edge X-ray absorption spectroscopy, 29Si and 1H nuclear magnetic resonance." In Zeolites: A Refined Tool for Designing Catalytic Sites, Proceedings of the International Zeolite Symposium, 19–25. Elsevier, 1995. http://dx.doi.org/10.1016/s0167-2991(06)81868-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Ogawa, Kouji, and Masao Doyama. "Simulation of surface diffusion and binding of titanium ad-atom and their clusters on (0001) plane of titanium." In Advanced Materials '93, 435–38. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-444-81993-2.50106-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

lvarez, M., and J. A. Joule. "Pomeranz–Fritsch Synthesis Using Ethyl Chloroformate/Trialkyl Phosphite Followed by Titanium(IV) Chloride." In Six-Membered Hetarenes with One Nitrogen or Phosphorus Atom, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-015-01227.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Titanium atoms"

1

Kaur, Harpreet, Aman Mahajan, and Bindiya Arora. "Determination of van der Waals C3 coefficients for titanium carbide MXenes with alkali atoms." In ADVANCED MATERIALS AND RADIATION PHYSICS (AMRP-2020): 5th National e-Conference on Advanced Materials and Radiation Physics. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0052418.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Luo, Zhi-Yong, Dong-Chuan Mo, and Shu-Shen Lyu. "Fluorine-Induced Superhydrophilic TiO2 Nanotube Arrays." 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/mnhmt2016-6328.

Full text

Abstract:

Continuous water film formed on a hydrophilic or superhydrophilic surface can delay the formation of a vapor film in boiling and thus improve critical heat flux (CHF), therefore, the fabrication of hydrophilic or superhydrophilic surface is an efficient approach to enhance boiling heat transfer. In the present work, superhydrophilic TiO2 nanotube arrays (TiNAs) interfaces are fabricated by anodization in fluoride contained electrolyte, and the fluorine is found out to be the key factor affecting the wettability of TiNAs interfaces. After anodization, a stable oxy-fluoride layer was formed at the interface as form of -O-Ti-F, the fluorine atoms are linked to the interface as terminal groups. Due to the strong polarity of titanium oxy-fluorides, superhrophilic TiO2 nanotube arrays interface is obtained. Furthermore, we characterize the stability of titanium oxy-fluorides by storing. After store for 2 months, the inner titanium fluorides (TiF4) are lost due to its strong volatility. Fortunately, the content of titanium oxy-fluorides remains the same, and retain its remarkable superhydrophilic properties. It is potential to design energy-efficient devices ranging from boiling heat transfer to self-cleaning.

APA, Harvard, Vancouver, ISO, and other styles

3

Miura, Hideo, Ken Suzuki, Yamato Sasaki, Tomohiro Sano, and Naokazu Murata. "High Temperature Damage of Ni-Base Superalloy Caused by the Change of Microtexture due to the Strain-Induced Anisotropic Diffusion of Component Elements." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62411.

Full text

Abstract:

In order to assure the reliability of advanced gas turbine systems, it is very important to evaluate the damage of high temperature materials such as Ni-base superalloys under creep and fatigue conditions quantitatively. Since the micro texture of the gamma-prime (γ′) phase was found to vary during the creep damage process, it is possible, therefore, to evaluate the creep damage of this material quantitatively by measuring the change of the micro texture. The mechanism of the directional coarsening of γ′ phasesof Ni-base superalloy under uni-axial strain at high temperatures, which is called rafting, was analyzed by using molecular dynamics (MD) analysis. The stress-induced anisotropic diffusion of Al atoms perpendicular to the finely dispersed γ/γ′ interface in the superalloy was observed clearly in a Ni(001)/Ni3Al(001) interface structure. The stress-induced anisotropic diffusion was validated by experiment using the stacked thin films structures which consisted of the (001) face-centered cubic (FCC) interface. The reduction of the diffusion of Al atoms perpendicular to the interface is thus, effective for improving the creep and fatigue resistance of the alloy. It was also found by MD analysis that the dopant elements in the superalloy also affected the strain-induced diffusion of Al atoms. Both palladium and tantalum were effective elements which restrain Al atoms from moving around the interface under the applied stress, while titanium and tungsten accelerated the strain-induced anisotropic diffusion, and thus, the rafting phenomenon.

APA, Harvard, Vancouver, ISO, and other styles

4

Qi, Jianbo, Hong Guo, Guangxin Wu, Jieyu Zhang, and Kuochih Chou. "First-Principles Study of Mechanical Property and Electronic Structure of Quenching and Aging U-Ti Alloy." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15440.

Full text

Abstract:

We use the first principles plane wave pseudopotential method calculated the mechanical property with respect to the quenching and aging process of uranium-1.3 wt.% titanium alloy, including the elastic modulus, bulk modulus, Young’s shear modulus and the ideal tensile strength, meanwhile deeply research on the mechanical property mechanism changes through t-he electronic structure. The results show that t-he elastic modulus and ideal tensile strength of quenching state are 198GP and 21.2GP, respectively, and slightly improving through aging treatment. The variation of energy and electronic structure of uranium-titanium solid solution in process of quenching indicate the phase transition from γ phase (cubic structure) to α′ phase (orthorhombic structure) lead to improve to the mechanical property. In process of aging, at the beginning the metastable supersaturated solid solution appears Guinier-Preston (G.P) zones, which are aggregate of solute atoms in the uranium matrix, further improving the tensile strength. Then U2Ti (hexagonal structure) precipitates present in over-aged process as a result of decomposition of metastable α′ phase and reduce the tensile strength. The result shows that the G.P/matrix and precipitate/matrix interfaces have ideal work of adhesion are 15.2eV and 12.5eV, respectively. Our results demonstrate theoretically quenching and aging heat treatment strengthening effect of uranium-titanium alloy.

APA, Harvard, Vancouver, ISO, and other styles

5

Chen, Min. "Characteristics of Helium Diffusion Trajectory: A Molecular Dynamics Study." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16466.

Full text

Abstract:

Molecular dynamics (MD) are employed to explore the features of Helium atom and He clusters diffusion in titanium at the temperatures between room temperature and 667k. The results demonstrate that the frequency for Helium atom jumping from site to site increases with the increasing temperature. Another important feature is that the diffusion of a He atom and a He trimer is a layered structure. The difference is that the trajectory of a He atom is between two Ti atom layers of (001) planes, and the trajectory of a He trimer is overlapped with the Ti atom layers of (001) plane. Meanwhile, it is observed that the layered structured diffusion becomes ambiguous for a He atom and a He trimer when the temperature is increased. The conclusion emphasizes different migration features for He clusters of various sizes.

APA, Harvard, Vancouver, ISO, and other styles

6

Lawrence, D. F., R. M. Ulfig, D. J. Larson, D. P. Olson, D. A. Reinhard, I. Y. Martin, S. Strennen, and P. H. Clifton. "Routine Device-Level Atom Probe Analysis." In ISTFA 2014. ASM International, 2014. http://dx.doi.org/10.31399/asm.cp.istfa2014p0019.

Full text

Abstract:

Abstract Continuing advances in Atom Probe Tomography and Focused Ion Beam Scanning Electron Microscope technologies along with the development of new specimen preparation approaches have resulted in reliable methods for acquiring 3D subnanometer compositional data from device structures. The routine procedure is demonstrated here by the analysis of the silicon-germanium source-drain region of a field effect transistor from a de-packaged off-the-shelf 28 nm design rule graphics chip. The center of the silicon-germanium sourcedrain region was found to have approximately 180 ppm of boron and the silicide contact was found to contain both titanium and platinum.

APA, Harvard, Vancouver, ISO, and other styles

7

Kelman, Vladimir A., Yurij V. Zhmenyak, Andrij S. Rybak, and Yuriy O. Shpenik. "Difficulties associated with stimulated emission on a titanium atom self-terminating transitions." In Symposium on High-Power Lasers and Applications, edited by Santanu Basu, Steven J. Davis, and Ernest A. Dorko. SPIE, 2000. http://dx.doi.org/10.1117/12.384299.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

James, Erik, Jamil Grant, Michael Alberter, Nastassja Dasque, Cynthia Price, and William J. Craft. "Nickel-Titanium Shape Memory Alloy Motors and Electromechanical Devices." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15119.

Full text

Abstract:

Shape memory alloys (SMA) have been an extensively used material for actuators in micro-electromechanical systems (MEMS) because actuation force and displacement are greatest in SMA amongst many actuator materials [1]. Of the alloys currently available for SMA actuators, the most popular system is Nitinol (or NiTi) due to its good oxidation resistance, reversible martensitic transformation, broad range of transformation temperatures (from -100 - 100 °C), and specific power density [2]. Current commercially available SMA wire has easily achieved no-load strain of 5% with medium gage SMA wires demonstrating an axial force capacity of 2 Newtons or more. While the potential use of SMA materials in a thermal-electric motor has been documented beginning in the 1980's, there are a number of new allows and fatigue-resistant materials that may lead to more general designs with a wide range of motions and applications. Shape memory alloys are a special type of material that exhibit two unique properties, pseudo-elasticity and shape memory effect (SME). SMA undergoes SME because of martensitic or diffusionless transformation where each atom has a slight displacement, creating observable changes throughout the structure as the allow changes states. This alloy has the ability, once heated, to return to its parent austenite phase where it exists at higher symmetry. Upon cooling, the material returns to one of many lower symmetry martensitic phases. This thermal cycle is shown in Figure 1. [3,4]. It is even possible for many variants of martensite to be present in the same material. Pseudo-elasticity is a rubber-like flexibility that allows the SMA to be contorted for a variety of purposes. Once contorted, the application of heat will cause the alloy to undergo martensitic transformation. Upon completion of the cycle, the alloy will have returned to its original shape. The development of SMA-based electromechanical devices delivers traditional mechanical motion with non-traditional methods. Rather than electromagnetic components rotating about a central axis to produce power, the rotary SMA motor utilizes contracting elements, and mush as spark ignition rotary engine, it can be designed to produce angular motion. Motion is accomplished with sequenced electrical signals sent across each element mounted between an eccentric crank. Rotary motion is produced during the power portion of the cycle for specific SMA elements under the application of an electrical signal. Based on this concept, our team developed a demonstration model with four active elements. We have demonstrated rotary motion of the device for an extended period of time, and we believe that macro-scale models can reduce the concept substantially and perhaps to the MEMS level.

APA, Harvard, Vancouver, ISO, and other styles

9

Jeon, Sanghyeon, Taehong Ha, Youngwoo Kim, Hyuckchai Jung, Taewoo Lee, Kyupil Lee, and Insoo Cho. "A Reduction of Off-Leakage Current of SWD (Sub-WordLine Driver) pMOSFET for NWL-Based Mobile DRAM." In ISTFA 2013. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.istfa2013p0407.

Full text

Abstract:

Abstract We demonstrate an effective way of reducing off-leakage current in sub-wordline driver pMOSFETs with lightly-doped source/drain, where gate-induced drain leakage current is much relaxed, compared with those of asymmetric source/drain. In mobile DRAM, one of key parameters is to achieve an extremely low level of standby current in power consumption. What has been found is that an increase of offleakage current in the pMOSFET is related closely to a contact-formation process, in particular, TiSi2 in p+/n junction. When a direct contact becomes close to a source/drain region, a titanium atom in TiSi2 tends not only to diffuse into a depletion region of p+/n junction but to play a critical role in leakage current. Maximizing a distance between p+ gate and its direct contact should be emphasized in order to control offleakage current in such a pMOSFET.

APA, Harvard, Vancouver, ISO, and other styles

10

Tahara, H., T. Shibata, K. Mitsuo, T. Yoshikawa, and Japan Y. Ando. "Diagnostic Measurement of Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jets for Nitriding Under a Low Pressure Environment." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p0021.

Full text

Abstract:

Abstract Spectroscopic and electrostatic probe measurements were carried out to understand the plasma feature inside and outside a 10-kW-class direct-current arc plasma jet generator with a supersonic expansion nozzle. Ammonia and a mixture of nitrogen and hydrogen were used as the working gas. The NH3 and N2+3H2 plasmas in the throat were expected to be nearly in a temperature-equilibrium condition, although the plasmas in the expansion nozzle and in the downstream plume without substrate plates were in thermodynamical nonequilibrium states. As a result, the H-atom excitation temperature and the N2 rotational excitation temperature decreased from 7000-11000 K in the throat to about 4000 K and to 1000-1500 K, respectively, on the nozzle exit at 0.1-0.2 g/s, although the NH rotational temperature did not show an axial decrease even in the nozzle. On the other hand, each temperature was almost kept a small range in the downstream plume without substrate plates under an ambient pressure of 130 Pa except for the NH rotational temperature for NH, working gas, although in the case with a titanium plate the nonequilibrium plasma came to a temperature-equilibrium one as approaching the plate.

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Titanium atoms"

1

Larson, D. J., and M. K. Miller. Atom probe field ion microscopy of titanium aluminides. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/650364.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Hays, James Allen. The coordination and atom transfer chemistry of titanium porphyrin complexes. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10194736.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Larson, D. L., M. K. Miller, H. Inui, and M. Yamaguchi. Atom probe field ion microscopy of polysynthetically twinned titanium aluminide. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/650359.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!