scholarly journals Anhydrous Methanol and Ethanol Dehydrogenation at Cu(111) Step Edges

2018 ◽  
Vol 122 (38) ◽  
pp. 21952-21962 ◽  
Author(s):  
Robert A. Hoyt ◽  
Matthew M. Montemore ◽  
E. Charles H. Sykes ◽  
Efthimios Kaxiras
Keyword(s):  
Anhydrous Methanol ◽  
Ethanol Dehydrogenation ◽  
Step Edges

Multislice calculations of RHEED patterns from vicinal Si (001)

1993 ◽  
Vol 51 ◽  
pp. 1000-1001
Author(s):  
Scott Lordi
Keyword(s):  
Misorientation Angle ◽  
Incident Angle ◽  
Incident Beam ◽  
Experimental Results ◽  
Bragg Condition ◽  
Vicinal Surfaces ◽  
Kinematic Theory ◽  
Step Edges

Vicinal Si (001) surfaces are interesting because they are good substrates for the growth of III-V semiconductors. Spots in RHEED patterns from vicinal surfaces are split due to scattering from ordered step arrays and this splitting can be used to determine the misorientation angle, using kinematic arguments. Kinematic theory is generally regarded to be inadequate for the calculation of RHEED intensities; however, only a few dynamical RHEED simulations have been attempted for vicinal surfaces. The multislice formulation of Cowley and Moodie with a recently developed edge patching method was used to calculate RHEED patterns from vicinal Si (001) surfaces. The calculated patterns are qualitatively similar to published experimental results and the positions of the split spots quantitatively agree with kinematic calculations.RHEED patterns were calculated for unreconstructed (bulk terminated) Si (001) surfaces misoriented towards [110] ,with an energy of 15 keV, at an incident angle of 36.63 mrad ([004] bragg condition), and a beam azimuth of [110] (perpendicular to the step edges) and the incident beam pointed down the step staircase.

scholarly journals Step Edges in Thin Films of Lamellar-Forming Diblock Copolymer

2012 ◽  
Vol 45 (23) ◽  
pp. 9531-9538 ◽  
Author(s):  
P. Stasiak ◽  
J. D. McGraw ◽  
K. Dalnoki-Veress ◽  
M. W. Matsen
Keyword(s):  
Thin Films ◽  
Diblock Copolymer ◽  
Step Edges

scholarly journals Role of step edges on the structure formation of α-6T on Ag(441)

2018 ◽  
Vol 667 ◽  
pp. 17-24 ◽  
Author(s):  
Thorsten Wagner ◽  
Daniel Roman Fritz ◽  
Zdena Rudolfová ◽  
Peter Zeppenfeld
Keyword(s):  
Structure Formation ◽  
Step Edges

Cu supported on thin carbon layer-coated porous SiO2 for efficient ethanol dehydrogenation

2018 ◽  
Vol 8 (2) ◽  
pp. 472-479 ◽  
Author(s):  
Qing-Nan Wang ◽  
Lei Shi ◽  
Wei Li ◽  
Wen-Cui Li ◽  
Rui Si ◽  
...  
Keyword(s):  
Carbon Layer ◽  
Good Stability ◽  
Ethanol Dehydrogenation ◽  
Porous Sio2 ◽  
Thin Carbon

The designed Cu/C/SiO2 catalyst combines the favourable properties of carbon and silica, thus showing improved selectivity associated with good stability.

Oxidation of Au on vicinal W(110): Role of step edges and facets

2007 ◽  
Vol 75 (20) ◽  
Author(s):  
A. Varykhalov ◽  
O. Rader ◽  
V. K. Adamchuk ◽  
W. Gudat ◽  
B. E. Koel ◽  
...  
Keyword(s):  
Step Edges

Polarography of nickel in concentrated chloride media

1966 ◽  
Vol 19 (8) ◽  
pp. 1343 ◽  
Author(s):  
TM Florence
Keyword(s):  
Ionic Strength ◽  
Graphite Electrode ◽  
Supporting Electrolyte ◽  
Anhydrous Methanol ◽  
Pyrolytic Graphite ◽  
Hydration Number ◽  
Mercury Electrode ◽  
Specific Adsorption ◽  
Dropping Mercury Electrode ◽  
Pyrolytic Graphite Electrode

In concentrated chloride media, nickel is reduced at far more positive potentials than in dilute solutions. The positive shift in half-wave potential increases as the ionic strength is raised, and is also greater when the cation of the supporting electrolyte has a high hydration number. Evidence is presented to show that the reduction in overpotential is due to the formation of a nickel chloride complex, [Ni(H2O)5Cl]+, which has a stoicheiometric stability constant of 0.094 � 0.009 at an ionic strength of 10.0. Spectrophotometric results show that this nickel species is not formed in low ionic strength solutions. In anhydrous methanol saturated with lithium chloride, nickel is present as the tetrachloro complex, [NiCl,]2-, which has similar polarographic behaviour to the monochloro complex. Current-potential curves recorded at a rotated pyrolytic graphite electrode enabled the behaviour of nickel to be studied in the absence of specific adsorption of the chloride ion. Nickel is reduced at more positive potentials at a dropping mercury electrode than at the pyrolytic graphite electrode, and the results indicate that this difference is due to specific adsorption of chloride on the mercury electrode.

A New, Nearly Single-Domain Surface Structure of Homoepitaxial Diamondr (001) Films

1996 ◽  
Vol 423 ◽  
Author(s):  
Yalei Kuang ◽  
Naesung Lee ◽  
Andrzej Badzian ◽  
Teresa Badzian ◽  
Tien T. Tsong
Keyword(s):  
Surface Structure ◽  
Natural Diamond ◽  
Single Layer ◽  
Chemical Vapor ◽  
Single Domain ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Plasma Chemical Vapor Deposition ◽  
Boron Doped ◽  
Step Edges

AbstractBoron-doped homoepitaxial diamond films were grown on natural diamond (001) substrates using microwave-assisted plasma chemical vapor deposition techniques. The surface structures were investigated using scanning tunneling microscopy (STM). This showed a dimertype 2×1 reconstruction structure with single-layer steps where dimer rows on the upper terrace are normal to or parallel to the step edges. We found that dimer rows parallel to the step edges are much longer than those normal to the step edges. The nearly single-domain surface structure observed by STM is in agreement with the low-energy electron diffraction (LEED) patterns from these surfaces. The high atomic resolution STM image showed that the local 1×1 configurations exist.

Sign in / Sign up

Export Citation Format

Share Document