IR spectroscopic investigations of chemical and photochemical reactions on metal oxides: bridging the materials gap

2017 ◽  
Vol 46 (7) ◽  
pp. 1875-1932 ◽  
Author(s):  
Yuemin Wang ◽  
Christof Wöll
Keyword(s):  
Metal Oxides ◽  
Single Crystals ◽  
Recent Progress ◽  
Photochemical Reactions ◽  
Reference Systems ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Oxide Powders ◽  
Infrared Reflection ◽  
Different Types ◽  
Ir Spectroscopic

In this review, we highlight recent progress (2008–2016) in infrared reflection absorption spectroscopy (IRRAS) studies on oxide powders achieved by using different types of metal oxide single crystals as reference systems.

Interactional effects between adsorbates on metal single-crystals

1986 ◽  
Vol 318 (1541) ◽  
pp. 101-115 ◽  
Keyword(s):  
Single Crystals ◽  
Electron Spectroscopy ◽  
Direct Evidence ◽  
Clean Surface ◽  
Penning Ionization ◽  
Co Chemisorption ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
Donor Acceptor ◽  
Metal Single Crystals

The interactions between CO species chemisorbed on Ni (111) and the interactions between CO and S on S-poisoned Ni (111) have been studied by using infrared reflection-absorption spectroscopy. For CO chemisorption on the clean surface, evidence for long-range chemical interactions is presented in which donor-acceptor effects prevail in determining CO hybridization states. For CO chemisorption on S-poisoned Ni (111) , evidence for the influence of local electrostatic effects in the vicinity of the S atom is presented. Slightly longer range S....CO interactions also occur, removing the CO chemisorption ability of next-neighbour Ni sites to S. These two interaction mechanisms extend over about six Ni atom neighbours to S. Surface Penning ionization electron spectroscopy has been used to probe the filled molecular orbitals of chemisorbed CO on Ni (111) , and direct evidence for the involvement in chemisorption of the CO 2n* orbitals is found, both on the clean N i(111) surface and on K + Ni (111).

scholarly journals Screen-Printed Electrodes Modified with Metal Nanoparticles for Small Molecule Sensing

Biosensors ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 9 ◽  
Author(s):  
Daniel Antuña-Jiménez ◽  
María Begoña González-García ◽  
David Hernández-Santos ◽  
Pablo Fanjul-Bolado
Keyword(s):  
Metal Oxides ◽  
Electrochemical Deposition ◽  
Surface Functionalization ◽  
Electrode Surface ◽  
Organic Molecule ◽  
Recent Progress ◽  
Metal Nanoparticle ◽  
Screen Printed Electrodes ◽  
Different Types ◽  
Screen Printed

Recent progress in the field of electroanalysis with metal nanoparticle (NP)-based screen-printed electrodes (SPEs) is discussed, focusing on the methods employed to perform the electrode surface functionalization, and the final application achieved with different types of metallic NPs. The ink mixing approach, electrochemical deposition, and drop casting are the usual methodologies used for SPEs’ modification purposes to obtain nanoparticulated sensing phases with suitable tailor-made functionalities. Among these, applications on inorganic and organic molecule sensing with several NPs of transition metals, bimetallic alloys, and metal oxides should be highlighted.

A New Defect in Polyethylene Single Crystals

1973 ◽  
Vol 31 ◽  
pp. 70-71
Author(s):  
E. L. Thomas ◽  
S. L. Sass
Keyword(s):  
Single Crystals ◽  
Screw Dislocation ◽  
Small Distance ◽  
Dipole Model ◽  
Dislocation Dipole ◽  
Chain Folding ◽  
Black And White ◽  
Polymer Crystal ◽  
Different Types

In polyethylene single crystals pairs of black and white lines spaced 700-3,000Å apart, parallel to the [100] and [010] directions, have been identified as microsector boundaries. A microsector is formed when the plane of chain folding changes over a small distance within a polymer crystal. In order for the different types of folds to accommodate at the boundary between the 2 fold domains, a staggering along the chain direction and a rotation of the chains in the plane of the boundary occurs. The black-white contrast from a microsector boundary can be explained in terms of these chain rotations. We demonstrate that microsectors can terminate within the crystal and interpret the observed terminal strain contrast in terms of a screw dislocation dipole model.

Isotopic disorder effect in the infrared reflection spectra of 6Lix7Li1−xY F4 single crystals

2007 ◽  
Vol 142 (5) ◽  
pp. 256-260
Author(s):  
E.A. Vinogradov ◽  
V.A. Yakovlev ◽  
N.N. Novikova ◽  
M.N. Popova ◽  
S.K. Saikin ◽  
...  
Keyword(s):  
Single Crystals ◽  
Reflection Spectra ◽  
Infrared Reflection ◽  
Disorder Effect
Sign in / Sign up

Export Citation Format

Share Document