Results 71 to 80 of about 262,836 (345)

Studies of the Adsorption of SO, H and O on a CrO Surface by an Electrical Conductivity Technique

Adsorption Science & Technology, 1999
Electrical conductivity measurements have been used to detect extremely small changes in the oxygen content of oxide semiconductors in contact with reducing or oxidizing gases. In continuation of previous studies, the oxygen loss of chromium oxide in H 2
Mahmoud M. Khader, Mahmoud M. Saleh, Ahmad M. Mohammad   +2 more
doaj   +1 more source

Precise control of surface oxygen vacancies in ZnO nanoparticles for extremely high acetone sensing response

Journal of Advanced Ceramics, 2022
ZnO has been studied intensely for chemical sensors due to its high sensitivity and fast response. Here, we present a simple approach to precisely control oxygen vacancy contents to provide significantly enhanced acetone sensing performance of commercial
Jihyun Lee, Youngmoon Choi, Byoung Joon Park, Jeong Woo Han, Hyun-Sook Lee, Jong Hyeok Park, Wooyoung Lee   +6 more
doaj   +1 more source

First principles study of adsorbed Cu_n (n=1-4) microclusters on MgO(100): structural and electronic properties

, 1998
We present a density functional study of the structural and electronic properties of small Cu_n (n=1,4) aggregates on defect-free MgO(100). The calculations employ a slab geometry with periodic boundary conditions, supercells with up to 76 atoms, and ...
A. Selloni, R. Car, Tosi M. P., V. Musolino   +3 more
core   +1 more source

Local Reconstructions of Silicene Induced by Adatoms [PDF]

, 2013
The interaction of silicene with Si, C, H, O, Ti atoms along with H$_2$, H$_2$O and O$_2$ molecules are investigated and the induced functionalities thereof are analyzed using first principles density functional theory.
Ciraci, S., Özçelik, V. Ongun
core   +2 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

HYPEREUTECTIC SILUMIN.NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING

Литьë и металлургия, 2017
It is shown that melting and molding of hypereutectic silumin are complicated physical and chemical nanostructural processes. The major part at these processes is played by the centers of crystallization of primary crystals of silicon, silicon ...
V. Yu. Stetsenko
doaj  

Coadsorption of Dioxygen and Carbon Monoxide on a Mg(100) Surface [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 1996
The activation of carbon monoxide by oxygen on Mg(100) surface has been investigated by X-ray photoelectron spectroscopy (XPS). Carbon monoxide is only weakly adsorbed (dispersion-type forces) on a magnesium surface.
Asghar Zeini Isfahani, M.W Roberts, A.F Carley, S. Read   +3 more
doaj  

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Quantum oscillations in adsorption energetics of atomic oxygen on Pb(111) ultrathin films: A density-functional theory study

, 2011
Using first-principles calculations, we have systematically studied the quantum size effects of ultrathin Pb(111) films on the adsorption energies and diffusion energy barriers of oxygen atoms.
Bo Sun, Henrich V. E., Ping Zhang, Wenchuan Wang, Wyckoff R. W. G., Xiaohong Shao, Yu Yang, Ziyu Hu   +7 more
core   +1 more source

Sub-surface Oxygen and Surface Oxide Formation at Ag(111): A Density-functional Theory Investigation [PDF]

, 2003
To help provide insight into the remarkable catalytic behavior of the oxygen/silver system for heterogeneous oxidation reactions, purely sub-surface oxygen, and structures involving both on-surface and sub-surface oxygen, as well as oxide-like structures
A. Kiejna, A. Kiejna, A. Nagy, A. Nagy, A. Nagy, A.I. Boronin, A.W. Czanderna, A.Y. Lozovoi, B. Chakraborty, B. Pettinger, B. Pettinger, C. Backx, C. Backx, C. Bungaro, C. Rehren, C. Stampfl, C. Stampfl, C. Stampfl, C.I. Carlisle, C.I. Carlisle, C.T. Campbell, Catherine Stampfl, D. Herein, D. Herein, F. Pratesi, G.C. Bond, G.I.N. Waterhouse, H. Over, H. Schubert, H. Schubert, I. Wachs, J. Chevrier, J. Neugebauer, J.A. White, J.P. Perdew, K. Reuter, K. Reuter, M. Bockstedte, M. Fuchs, M. Rocca, M. Ronay, M. Taniguchi, M. Todorova, M.V. Ganduglia-Pirovano, Matthias Scheffler, N. Troullier, N.A. Saliba, P. Nordlander, R.A. van Santen, R.B. Grant, S. Bare, S.L. Cunningham, T.E. Felter, Th. Schedel-Niedrig, V.I. Bukhtiyarov, W. Segeth, W.X. Li, Wei-Xue Li, X. Bao, X. Bao, X. Bao, X. Bao, Y. Uchida   +62 more
core   +1 more source