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Online since: July 2022
Authors: Allal Challioui, Larbi El Farh, Siham Malki, Ibtissam Guesmi, Zakariae Darhi
Figure 1: The unit cell of 1T-ZrX2 structure (right) and its Brillouin zone (left).
Band Structure and Density of States Figure 2: Band structure and total DOS along with the partial density of states (states/eV unit cell). 1T-ZrS2 (a), 1T-ZrSe2 (b) and 1T-ZrTe2 (c).
Pauling, THE CRYSTAL STRUCTURE OF MOLYBDENITE, J.
Krusius, Band structure of group IVA transition-metal dichalcogenides, J.
Yoffe, The band structures of some transition metal dichalcogenides.
Band Structure and Density of States Figure 2: Band structure and total DOS along with the partial density of states (states/eV unit cell). 1T-ZrS2 (a), 1T-ZrSe2 (b) and 1T-ZrTe2 (c).
Pauling, THE CRYSTAL STRUCTURE OF MOLYBDENITE, J.
Krusius, Band structure of group IVA transition-metal dichalcogenides, J.
Yoffe, The band structures of some transition metal dichalcogenides.
Online since: May 2003
Authors: A.L. Oliveira, P.B. Malafaya, Isabel B. Leonor, Rui L. Reis, H.S. Azevedo, C.M. Alves
In fact, cells are sensitive to several
surface properties such as roughness, energy, chemistry and even to more subtle characteristics such
as relative crystallinity.
(d) showing a detail of the structure presented in (c).
Magnification (f) showing a detail of the structure presented in (e).
The factors that affect ion release from thin-film coatings include Ca-P chemistry, coating roughness, and extent of coating strain.
Akashi: Chemistry Letters 8 (1998) p.711 [71] T.
(d) showing a detail of the structure presented in (c).
Magnification (f) showing a detail of the structure presented in (e).
The factors that affect ion release from thin-film coatings include Ca-P chemistry, coating roughness, and extent of coating strain.
Akashi: Chemistry Letters 8 (1998) p.711 [71] T.
Online since: August 2008
Authors: Bo Monemar
Monemar
Department of Physics, Biology and Chemistry, Linköping University, S-58183 Linköping, Sweden
bom@ifm.liu.se
Keywords: light emitters, visible light, III-nitrides, LED, laser diode, growth technique, wide band
gap, defects, polarization fields, solid state lighting.
The development of InGaN based structures was mainly pioneered at Nichia Corporation under S Nakamura.
After that time multiple quantum well (MQW) structures could obviously be grown in a similar fashion.
Recent development of nonpolar III-nitride structures.
These developments have recently been extended to growth of non-polar and semi-polar structures [62].
The development of InGaN based structures was mainly pioneered at Nichia Corporation under S Nakamura.
After that time multiple quantum well (MQW) structures could obviously be grown in a similar fashion.
Recent development of nonpolar III-nitride structures.
These developments have recently been extended to growth of non-polar and semi-polar structures [62].
Online since: June 2010
Authors: Lars Österlund
Results
Particle structure and morphology.
The A40 sample exhibits a clear dominance of structure AIII shown in Fig. 2.
The HR-TEM micrograph shown in Fig. 1b is associated with structure AII.
Formic acid adsorption structure.
On rutile particles and small anatase particles the chemistry is mainly governed by bidentate coordinated species, which both are energetically more stable and less reactive towards oxygen radicals.
The A40 sample exhibits a clear dominance of structure AIII shown in Fig. 2.
The HR-TEM micrograph shown in Fig. 1b is associated with structure AII.
Formic acid adsorption structure.
On rutile particles and small anatase particles the chemistry is mainly governed by bidentate coordinated species, which both are energetically more stable and less reactive towards oxygen radicals.
Online since: November 2014
Authors: Inderpreet Kaur, Shriniwas Yadav, Sukhbir Singh, Vanish Kumar, Shweta Arora, Deepika Bhatnagar
This is because arrays have a regular structure which is easier to build with self-assembly.
CNTs are of hollow structure formed by rolling, one atom thick sheet of sp2 hybridized carbon atoms named as graphene.
The structure of a SWNT can be conceptualized by wrapping planar sheet of graphene into a seamless cylinder as shown in fig. 6.
The simulation work based on DFT, the chemistry of imperfect graphene with a broad class of defects such as Stone-Wales (SW) defects [33], bi-vacancies, nitrogen substitution impurities, and edges has been reported [34].
Multidisciplinary efforts involving theory, synthetic chemistry, device fabrication and physics, and electrical engineering will be required to realize the initial promise of molecular electronics.
CNTs are of hollow structure formed by rolling, one atom thick sheet of sp2 hybridized carbon atoms named as graphene.
The structure of a SWNT can be conceptualized by wrapping planar sheet of graphene into a seamless cylinder as shown in fig. 6.
The simulation work based on DFT, the chemistry of imperfect graphene with a broad class of defects such as Stone-Wales (SW) defects [33], bi-vacancies, nitrogen substitution impurities, and edges has been reported [34].
Multidisciplinary efforts involving theory, synthetic chemistry, device fabrication and physics, and electrical engineering will be required to realize the initial promise of molecular electronics.
Online since: June 2022
Authors: Abel Woldu Ourgessa, Aseged Tebeje Tasew, Rahel Alemu Hafa
The prepared geopolymers were cured at different temperatures (ambient, 40 ℃ and 60 ℃) and were studied to determine their strength, bond structure, mechanical properties, and resistance in an acidic and salty environment using an accelerated durability test.
FTIR results showed distinctive peaks of aluminosilicate bond structures.
From the results, it can be concluded that geopolymers are formed since the above peaks are typical for polymeric structures of aluminosilicate networks.
In addition, they show significant carbonate structures due to bicarbonate formed when samples are exposed to humid air.
J. van Deventer, Geopolymers: structure, processing, properties and industrial applications.
FTIR results showed distinctive peaks of aluminosilicate bond structures.
From the results, it can be concluded that geopolymers are formed since the above peaks are typical for polymeric structures of aluminosilicate networks.
In addition, they show significant carbonate structures due to bicarbonate formed when samples are exposed to humid air.
J. van Deventer, Geopolymers: structure, processing, properties and industrial applications.
Online since: October 2022
Authors: Rajendra D. Kale, Pradip V. Patil
The kinetics of the growth and structure of the thin films is governed by adhesion.
The computer simulation studies [21-22] on the columnar growth of thin films suggested a loose chain-like growth of structure during deposition.
Yu, and Y Han, Polymer thin films for antireflection coatings, J. of Material Chemistry C, 1(12)(2013)2266-2285
Yu, and Y Han, Broadband antireflection of block copolymer/homopolymer blend films with gradient refractive index structures,, J.
,Xie, H., Rapid fabrication of antireflective pyramid structure on polystyrene film used as protective layer of solar cell.
The computer simulation studies [21-22] on the columnar growth of thin films suggested a loose chain-like growth of structure during deposition.
Yu, and Y Han, Polymer thin films for antireflection coatings, J. of Material Chemistry C, 1(12)(2013)2266-2285
Yu, and Y Han, Broadband antireflection of block copolymer/homopolymer blend films with gradient refractive index structures,, J.
,Xie, H., Rapid fabrication of antireflective pyramid structure on polystyrene film used as protective layer of solar cell.
Online since: December 2003
Authors: Takashi Nakamura, Tadashi Kokubo, Hyun Min Kim, Kawashita Masakazu, Tian Ying Xiong, Xin-Yu Cui, Jie Wu, Hua-Zi Jin
Journal Citation (to be inserted by the publisher )
Copyright by Trans Tech Publications
Effect of Surface Morphology and Crystal Structure on Bioactivity of
Titania Films Formed on Titanium Metal via Anodic Oxidation
in Sulfuric Acid Solution
Tian-Ying Xiong
1
, Xin-Yu Cui
1,2
, Hyun-Min Kim
3
, Masakazu Kawashita2 ,
Tadashi Kokubo4 , Jie Wu1 , Hua-Zi Jin1 and Takashi Nakamura5
1
Institute of Metal Research, Chinese Academy of Sciences,
72 Wenhua Road, Shenyang, 110016, P.R.
China tyxiong@imr.ac.cn 2 Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan 3 Department of Ceramic Engineering, School of Advanced Materials Engineering, Yonsei University 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea 4 Research Institute for Science and Technology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan 5 Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan Keywords: titanium metal, anodic oxidation, sulfuric acid solution, apatite, simulated body fluid Abstract.
Recently, it has been shown that titania gel with anatase structure showed a high apatite-forming ability in a body environment [3].
Therefore, the titania layer with anatase structure can be formed on the surface of tough titanium by anodic oxidation, and hence the anodically oxidized titanium is expected to show a high apatite-forming ability in body environment.
of 100 V, whereas they originated porous structure on their surfaces, when they were anodically oxidized at higher applied voltages, above 150 V.
China tyxiong@imr.ac.cn 2 Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan 3 Department of Ceramic Engineering, School of Advanced Materials Engineering, Yonsei University 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea 4 Research Institute for Science and Technology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan 5 Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan Keywords: titanium metal, anodic oxidation, sulfuric acid solution, apatite, simulated body fluid Abstract.
Recently, it has been shown that titania gel with anatase structure showed a high apatite-forming ability in a body environment [3].
Therefore, the titania layer with anatase structure can be formed on the surface of tough titanium by anodic oxidation, and hence the anodically oxidized titanium is expected to show a high apatite-forming ability in body environment.
of 100 V, whereas they originated porous structure on their surfaces, when they were anodically oxidized at higher applied voltages, above 150 V.
Online since: February 2020
Authors: S. Suresh, Krishnan Venkata
To verify the enhancement obtained by employing laser structured surfaces we have conducted experiments on bare copper surface and compared it with the values obtained using laser structured surfaces.
In this work three different laser power of 1.0, 1.5 and 2.0 J/cm2 are employed for structuring the surfaces.
Fig. 4 gives the contact angle images of plain copper and three laser structured surfaces.
This clearly explains the reason beyond the heat transfer enhancement of laser structured surface. 5.3 Heat flux of plain and laser structured surfaces Fig. 6.
Georgiadis, “Effects of surface chemistry and groove geometry on wetting characteristics and droplet motion of water condensate on surfaces with rectangular microgrooves,” Int.
In this work three different laser power of 1.0, 1.5 and 2.0 J/cm2 are employed for structuring the surfaces.
Fig. 4 gives the contact angle images of plain copper and three laser structured surfaces.
This clearly explains the reason beyond the heat transfer enhancement of laser structured surface. 5.3 Heat flux of plain and laser structured surfaces Fig. 6.
Georgiadis, “Effects of surface chemistry and groove geometry on wetting characteristics and droplet motion of water condensate on surfaces with rectangular microgrooves,” Int.
Online since: May 2022
Authors: Giulia Masi, Maria Chiara Bignozzi
In a previous study, a 20-mm coating based on light-weight alkali activated mortar (LWAAM) suitable for the protection of steel structures against fire was successfully developed.
To understand if the same coating is also able to ensure corrosion protection to steel structures, this study reports the results obtained in two different chloride-rich environments.
Regarding AAMs as construction materials, most of the research efforts currently focus on the durability of steel in contact with AAMs and geopolymer, considering steel‐reinforced structures for structural applications [6].
The main outcomes revealed that several microstructural parameters, such as steel-binder interface, pore solution chemistry, precursor and activator source, strongly influence the steel corrosion behavior.
To understand if the same coating successfully used for PFP is also able to ensure corrosion protection to steel structures, this study reports the results of the corrosion behavior of the coated steel exposed to chloride-rich environment.
To understand if the same coating is also able to ensure corrosion protection to steel structures, this study reports the results obtained in two different chloride-rich environments.
Regarding AAMs as construction materials, most of the research efforts currently focus on the durability of steel in contact with AAMs and geopolymer, considering steel‐reinforced structures for structural applications [6].
The main outcomes revealed that several microstructural parameters, such as steel-binder interface, pore solution chemistry, precursor and activator source, strongly influence the steel corrosion behavior.
To understand if the same coating successfully used for PFP is also able to ensure corrosion protection to steel structures, this study reports the results of the corrosion behavior of the coated steel exposed to chloride-rich environment.