@article {5117,
	title = {Tensor LEED analysis for the electrodeposited Pt(111)-(3x3)-Ag,I surface structure},
	journal = {Surface Science},
	volume = {490},
	number = {3},
	year = {2001},
	note = {ISI Document Delivery No.: 473XWTimes Cited: 5Cited Reference Count: 34},
	month = {Sep},
	pages = {256-264},
	type = {Article},
	abstract = {A crystallographic analysis is reported using low-energy electron diffraction (LEED) in the tensor LEED approach for the electrodeposited coadsorption (3 x 3) structure with 4/9 monolayer (ML) of silver and 4/9 ML of iodine on the Pt(1 1 1) surface. The structure approximates a two-layer slice of bulk AgI cut parallel to its (1 1 1) plane and superimposed on the substrate with the Ag atoms in contact with the topmost Pt(1 1 1) layer, and the I atoms forming an overlayer on the Ag atoms. There are two types of Ag atoms in the (3 x 3) unit mesh; one type bonds to a single Pt atom, while the other type bonds to three Pt atoms. The average Ag-Pt bond distances are close to 2.48 and 2.82 (A) over circle respectively for the one and three-coordinate Ag atoms, but both types of Ag atoms bond to three I atoms with an average Ag-I distance of 2.67 (A) over circle. No significant corrugation is observed for either the I layer or the Ag layer. (C) 2001 Elsevier Science B.V. All rights reserved.},
	keywords = {ADSORBATES, ADSORPTION, AG, chemisorption, ELECTROCHEMISTRY, ENERGY-ELECTRON-DIFFRACTION, IODINE, LOW ENERGY ELECTRON DIFFRACTION (LEED), METAL-SURFACES, platinum, PT(111), SCANNING-TUNNELING-MICROSCOPY, silver},
	isbn = {0039-6028},
	url = {<Go to ISI>://000171075300007},
	author = {Labayen, M. and Harrington, D. A. and Saidy, M. and Mitchell, K. A. R.}
}
@article {4656,
	title = {Tensor LEED analyses for three chemisorbed structures formed by iodine on a Pt(111) surface},
	journal = {Surface Review and Letters},
	volume = {6},
	number = {5},
	year = {1999},
	note = {ISI Document Delivery No.: 300LQTimes Cited: 17Cited Reference Count: 406th International Conference on the Structure of Surfaces (ICSOS-6)JUL 26-30, 1999VANCOUVER, CANADAUniv British Columbia},
	month = {Oct},
	pages = {871-881},
	type = {Proceedings Paper},
	abstract = {Three distinct ordered iodine structures on a Pt(lll) surface have been studied with LEED crystallography in the coverage range 0.33-0.44 monolayers. These surfaces have translational symmetries of the ((root 3 x root 3)R30 degrees, (root 7 x root 7)R19.1 degrees and (3 x 3) types, and they all involve overlayer adsorption on the basically unreconstructed metal structures. The root 3 surface phase is indicated to have essentially all I atoms adsorbed at the regular threefold sites of the fee type (i.e. 3f sites), with no significant involvement by the corresponding sites of the hcp type (i.e. 3h sites). The root 7 structure has one I on an atop Pt site, and one each at 3f and 3h sites per unit mesh, while the (3 x 3) surface has one I on an atop site and three on bridge sites per unit mesh. The I corrugation is about 0.5 Angstrom for the root 7 structure, but is reduced to around 0.1 Angstrom at the (3 x 3) surface. The surface I-Pt bond lengths from these analyses show a general tendency to follow trends expected with the varying I coordination numbers. A preliminary discussion is given for uncertainties associated with some relaxations indicated in the metallic structures.},
	keywords = {ADSORBATES, ADSORPTION, ELECTROCHEMISTRY, ENERGY-ELECTRON-DIFFRACTION, METAL-SURFACES, PT(100), RELIABILITY, RH(111), SCANNING TUNNELING MICROSCOPY, TRANSFORMATIONS},
	isbn = {0218-625X},
	url = {<Go to ISI>://000086254800043},
	author = {Saidy, M. and Mitchell, K. A. R. and Furman, S. A. and Labayen, M. and Harrington, D. A.}
}
@article {4655,
	title = {Tensor LEED analysis for the Cu(111)-(root x root 7)R19.1 degrees-S surface structure},
	journal = {Surface Science},
	volume = {441},
	number = {2-3},
	year = {1999},
	note = {ISI Document Delivery No.: 253RWTimes Cited: 11Cited Reference Count: 36},
	month = {Nov},
	pages = {425-435},
	type = {Article},
	abstract = {A tensor LEED analysis is reported for the (root 7 x root 7)R19.1 degrees structure formed by S at the Cu(lll)surface. A new structural model is found which corresponds to a modified version of the copper sulphide overlayer model first proposed by Domange and Oudar. In that model, the topmost layer has 3/7 monolayer each of Cu and S atoms, but the modification involves one S atom per unit mesh moving down to displace a Cu atom from the second metal layer. Relaxations among the topmost Cu atoms result in one S atom being effectively three-fold coordinate while the other two are sixfold coordinate and 12-fold coordinate: the averaged S-Cu bond lengths are indicated to equal 2.19, 2.47 and 2.62 Angstrom respectively. Some discussion is included of factors that may influence this choice of surface structure. (C) 1999 Elsevier Science B.V. All rights reserved.},
	keywords = {ADSORPTION, chemisorption, copper, ENERGY-ELECTRON-DIFFRACTION, LAYERS, low energy electron diffraction, LOW INDEX SINGLE CRYSTAL, METAL-SURFACES, MOLECULE, RAY STANDING-WAVE, RECONSTRUCTION, RU(0001), SUBSTRATE, SULFUR, sulphur, SURFACE, surface reconstruction},
	isbn = {0039-6028},
	url = {<Go to ISI>://000083570400024},
	author = {Saidy, M. and Mitchell, K. A. R.}
}
@article {4657,
	title = {Tensor LEED analysis for the Ni(111)-(root 7 x root 7)R19.1 degrees-P surface structure: Comparison with other root 7 systems},
	journal = {Surface and Interface Analysis},
	volume = {28},
	number = {1},
	year = {1999},
	note = {ISI Document Delivery No.: 234JZTimes Cited: 1Cited Reference Count: 36Asia-Pacific Surface and Interface Analysis Conference 1998 (APSIAC 98)NOV 30-DEC 04, 1998SINGAPORE, SINGAPORE},
	month = {Aug},
	pages = {84-91},
	type = {Proceedings Paper},
	abstract = {A crystallographic analysis is reported using low-energy electron diffraction (LEED) in the tensor LEED approach for the (root 7 x root 7)R19.1 degrees structure formed by 3/7 monolayer of phosphorus at the Ni(111) surface. This surface has a novel structure in which each phosphorus atom bonds to seven neighbouring Ni atoms, four in the top layer and three in the second layer, at an average distance close to 2.39 Angstrom. Formally this reconstruction involves three neighbouring Ni atoms in a triangular arrangement per unit mesh of the original unreconstructed surface being replaced by three phosphorus atoms. A discussion is included of the structural relaxations that occur in this surface as the demands of Ni-P bonding are balanced against those for Ni-Ni and P-P contributions. Comparisons are made with the root 7 reconstructions observed for related systems, including those for P/Rh(111), S/Pd(111) and S/Cu(111). Copyright (C) 1999 John Wiley \& Sons, Ltd.},
	keywords = {(ROOT-3X-ROOT-3)R30-DEGREES, analysis, chemisorption, CRYSTALLOGRAPHIC, ENERGY-ELECTRON-DIFFRACTION, LEED, METAL-SURFACES, Ni, NI(111), P, RAY STANDING-WAVE, RECONSTRUCTION, RELAXATIONS, SUBSTRATE, SULFUR},
	isbn = {0142-2421},
	url = {<Go to ISI>://000082482200018},
	author = {Saidy, M. and Zhou, M. Y. and Mitchell, K. A. R.}
}
@article {4191,
	title = {Ethylene ligand structures of Os(CO)(4)(C2H4) and Os-2(CO)(8)(C2H4) determined by H-1 NMR in liquid crystal solvents},
	journal = {Inorganic Chemistry},
	volume = {37},
	number = {8},
	year = {1998},
	note = {ISI Document Delivery No.: ZJ655Times Cited: 2Cited Reference Count: 69},
	month = {Apr},
	pages = {1720-1728},
	type = {Article},
	abstract = {The ethylene complexes Os-2(CO)(8)(mu-eta(1),eta(1)-C2H4) (1) and Os(CO)(4)(eta-C2H4) (2) have been studied by H-1 NMR in liquid crystal (nematic phase) solvents. For 1 or 2, three dipolar couplings were observed and assigned to intramolecular geminal, cis, and trans H-1-H-1 dipolar couplings. The H-1 NMR spectrum of Os(CO)(4)((CH2CH2)-C-13)(2-C-13) has also been analyzed and two additional C-13-H-1 dipolar couplinps have allowed determination of the absolute bond angles and relative bond lengths of the ethylene portion of 2 C-13. The observed dipolar couplings for 2-C-13 have been corrected for harmonic vibrations. A comparison of the ethylene geometry of 2 with that of other transition metal ethylene complexes and with free ethylene shows that the (C-2-H-4)Os unit of 2 is best described as a metallacyclopropane. Deuterium substitution is used to demonstrate liquid crystal NMR as a stereochemical probe. The H-1 NMR spectrum of Os-2(CO)(8)(mu-eta(1),eta(1)-(CH2CH2)-C-13) (1-C-13) has also been analyzed in a nematic phase solvent. The dimetallacyclobutane ring of 1-C-13 is best described as two rapidly interconverting ring-puckered conformers of C-2-symmetry. The liquid crystal NMR derived structural parameters for 1-C-13 are compared with those previously determined by neutron diffraction. The solution and solid-state structures are very similar. The ethylene complexes 1 and 2 are proposed as structural and spectroscopic models for ethylene chemisorbed on metal surfaces.},
	keywords = {ANISOTROPIC LIQUIDS, CHEMISORBED ETHYLENE, INTERNAL MOTION, METAL-SURFACES, NEMATIC PHASES, NEUTRON-DIFFRACTION, NUCLEAR MAGNETIC-RESONANCE, ORIENTED MOLECULES, SPIN DIPOLAR COUPLINGS, VIBRATIONAL MODEL},
	isbn = {0020-1669},
	url = {<Go to ISI>://000073238400007},
	author = {Bender, B. R. and Hembre, R. T. and Norton, J. R. and Burnell, E. E.}
}
@article {4062,
	title = {LEED crystallographic analysis for the Rh(111)-(root 7x root 7)R19.1 degrees-P surface structure},
	journal = {Surface Science},
	volume = {372},
	number = {1-3},
	year = {1997},
	note = {ISI Document Delivery No.: WF207Times Cited: 7Cited Reference Count: 32},
	month = {Feb},
	pages = {312-322},
	type = {Article},
	abstract = {A recent communication [11] reported a novel structure for the (root 7 x root 7)R19.1 degrees reconstruction formed by P on the Rh(111) surface, and the present paper details the associated tensor LEED analysis. This reconstruction involves a packed arrangement of Rh pentagons and triangles for the topmost layer, with P atoms at 3/7 monolayer coverage occupying eight-coordinate sites created by the Rh pentagons. The nearly flat, densely packed Rh-P mixed layer (density of five Rh and three P atoms per seven Rh atoms in the substrate unit mesh) appears to provide a major stabilizing effect on this surface. The average P-Rh bond distance is indicated to be 2.52 Angstrom, slightly longer than that (2.38 A) in bulk Rh2P where the P atoms are also eight-coordinate. Some similarities are noted with the corresponding (rv (7) over bar x root 7)R19.1 degrees structures formed by S on the Pd(111), Cu(111) and Ag(111) surfaces.},
	keywords = {chemisorption, ENERGY ELECTRON-DIFFRACTION, HETEROCYCLIZATION SITES, low energy electron diffraction, low index single crystal surface, METAL-SURFACES, microscopy, PHOSPHORUS, rhodium, SULFIDED PD(111) SURFACE, SURFACE RELAXATION AND RECONSTRUCTION, TENSOR LEED},
	isbn = {0039-6028},
	url = {<Go to ISI>://A1997WF20700043},
	author = {Liu, W. and Wong, K. C. and Mitchell, K. A. R.}
}
@article {4061,
	title = {The structure of the Pd(111)-(root 7x root 7)R19.1 degrees-S surface: comparison with the corresponding P/Rh(111) surface},
	journal = {Surface Science},
	volume = {393},
	number = {1-3},
	year = {1997},
	note = {ISI Document Delivery No.: YP959Times Cited: 15Cited Reference Count: 35},
	month = {Dec},
	pages = {L119-L125},
	type = {Letter},
	abstract = {The structure of the Pd(lll)-(root 7 x root 7)R19.1<degrees-S surface has been determined by low-energy electron diffraction and has been shown to involve a reconstructed topmost metal layer based on a packed arrangement of Pd pentagons and triangles, with S atoms at 3/7 monolayer coverage occupying eight-coordinate sites at the centre of each Pd pentagon. Comparisons are made with the structure recently determined for the corresponding P/Rh(lll) system. In both cases, the atomic density in the reconstructed layer increases to five metal atoms and three chemisorbed atoms for every seven atoms in the regular metal surface. Some details are closely similar between the two systems, but an intriguing difference is also indicated. In S/Pd(lll), four metal atoms in each pentagonal ring appear close to hcp-type three-fold sites, while the other is close to a fee-type three-fold site. This contrasts with the situation for the topmost layer of the P/Rh(lll) system, for which the reversed lateral registry has been reported (i.e. the atoms of each pentagonal ring occupy three-fold sites where four are of the fee type and one of the hcp type). (C) 1997 Elsevier Science B.V.},
	keywords = {ADSORBATE STRUCTURE, ARRANGEMENT, chemisorption, CRYSTAL SURFACES, CRYSTALLOGRAPHY, ENERGY-ELECTRON-DIFFRACTION, LEED INTENSITY ANALYSIS, low energy electron diffraction crystallography, LOW INDEX SINGLE, METAL-SURFACES, palladium, PD(111) SURFACE, RECONSTRUCTION, SULFUR, sulphur, surface structure},
	isbn = {0039-6028},
	url = {<Go to ISI>://000071333200009},
	author = {Liu, W. and Mitchell, K. A. R. and Berndt, W.}
}
@article {3432,
	title = {What determines the structures formed by oxygen at low index surfaces of copper?},
	journal = {Progress in Surface Science},
	volume = {50},
	number = {1-4},
	year = {1995},
	note = {ISI Document Delivery No.: TL808Times Cited: 25Cited Reference Count: 3515th Biennial Canadian Conference on Surface Science (Surface Canada 95)MAY 25-27, 1995WATERLOO, CANADACanadian Soc Chem, Div Surface Sci, Canadian Assoc Physicists},
	month = {Sep-Dec},
	pages = {247-257},
	type = {Proceedings Paper},
	abstract = {This article reviews structural details from tensor LEED analyses for three oxygen on copper surfaces, specifically those designated Cu(11O)-(2x1)-O, Cu(110)-c(6x2)-O and Cu(100)-(2 root 2x root 2)R45 degrees-O. Certain common features are identified and discussed. It appears that these particular structures receive some stability from being able to fit O-Cu-O building blocks, of the sort needed to construct bulk Cu2O, on to the Cu substrates. Each O atom maintains a four-coordinate status, while simultaneously allowing reasonable O-Cu bond lengths. Comparisons are made with other related systems, namely O at Ni and N at Cu surfaces.},
	keywords = {chemisorption, CU(110), ENERGY-ELECTRON-DIFFRACTION, INDUCED RECONSTRUCTIONS, LEED ANALYSIS, METAL-SURFACES, SCATTERING},
	isbn = {0079-6816},
	url = {<Go to ISI>://A1995TL80800021},
	author = {Liu, W. and Wong, K. C. and Zeng, H. C. and Mitchell, K. A. R.}
}
