Polystyrene Surfaces Terminated with a Single Functionality of Alcohol

1995 ◽  
Vol 414 ◽  
Author(s):  
J.Q. Sun ◽  
I. Bello ◽  
W.M. Lau ◽  
R.H. Lipson ◽  
Z.D. Lin
Keyword(s):  
Photoelectron Spectroscopy ◽  
Polymer Surfaces ◽  
Water Molecules ◽  
Oh Radicals ◽  
Specific Chemical ◽  
X Ray ◽  
Surface Functionality ◽  
Resolution Electron ◽  
Hot Filament ◽  
Electron Energy Loss

AbstractPolymer surfaces terminated with a specific chemical functionality are attractive for biomaterial applications because of the predictability and selectivity of surface reactions towards the anchoring of a biochemical agent to the polymer. In the present work, engineering of surface functionality was performed using OH radicals generated in gas phase by the reaction between a hot filament and water molecules in vacuum. The generation of OH was confirmed by laser induced fluorescence spectroscopy. The incorporation of oxygen and formation of alcohol groups on polystyrene were confirmed by x-ray photoelectron spectroscopy. High resolution electron energy loss spectroscopic data also showed that for polystyrene with an uptake of less than a monolayer equivalent of oxygen, C-OH was the only detectable surface functionality containing oxygen.

Chemisorption Geometry, Vibrational Spectra, and Thermal Desorption of Formic Acid on TiO2(110)

1998 ◽  
Vol 05 (01) ◽  
pp. 381-385 ◽  
Author(s):  
S. A. Chambers ◽  
M. A. Henderson ◽  
Y. J. Kim ◽  
S. Thevuthasan
Keyword(s):  
Formic Acid ◽  
Photoelectron Spectroscopy ◽  
High Energy ◽  
Decomposition Products ◽  
X Ray ◽  
Low Energy Electron Diffraction ◽  
Resolution Electron ◽  
Low Energy Electron ◽  
Temperature Programmed ◽  
Electron Energy Loss

We have used high-energy X-ray photoelectron spectroscopy and diffraction (XPS/XPD), low-energy electron diffraction (LEED), high-resolution electron energy loss spectroscopy (HREELS) and temperature-programmed desorption (TPD) to determine the molecular orientation, long-range order, vibrational frequencies, and desorption temperatures for formic acid and its decomposition products on TiO 2(110). Molecular adsorption occurs at coverages approaching one monolayer, producing a weakly ordered (2 × 1) surface structure. High-energy XPD reveals that the formate binds rigidly in a bidentate fashion through the oxygens to Ti cation rows along the [001] direction with an O–C–O bond angle of 126 ± 4°. During TPD some surface protons and formate anions recombine and desorb as formic acid above 250 K. However, most of the decomposition products follow reaction pathways leading to H 2 O , CO and H 2 CO desorption. Water is formed in TPD below 500 K via the abstraction of lattice oxygen by deposited acid protons.

The growth and thermal properties of Au deposited on Rh(111): formation of an ordered surface alloy

2016 ◽  
Vol 18 (36) ◽  
pp. 25230-25240 ◽  
Author(s):  
László Óvári ◽  
András Berkó ◽  
Gábor Vári ◽  
Richárd Gubó ◽  
Arnold Péter Farkas ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Low Energy ◽  
Ion Scattering ◽  
X Ray ◽  
Low Energy Ion Scattering ◽  
Resolution Electron ◽  
Ion Scattering Spectroscopy ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Electron Energy Loss

Scanning tunnelling microscopy (STM), low energy ion scattering spectroscopy (LEIS), X-ray photoelectron spectroscopy (XPS) and high resolution electron energy loss spectroscopy (HREELS) were applied for studying Au deposited on the Rh(111) surface.

Adsorption of Oxygen on Sodium Saturated Cu{110}

1986 ◽  
Vol 83 ◽  
Author(s):  
D. E. Grider ◽  
J. F. Wendelken
Keyword(s):  
Photoelectron Spectroscopy ◽  
Low Energy ◽  
Sticking Coefficient ◽  
X Ray ◽  
Low Energy Electron Diffraction ◽  
Metallic Character ◽  
Resolution Electron ◽  
Initial Oxygen ◽  
Low Energy Electron ◽  
Electron Energy Loss

ABSTRACTThe adsorption of oxygen on a sodium saturated Cu{110} surface is examined with x-ray photoelectron spectroscopy (XPS) in an extension of a previous study of this system which utilized low energy electron diffraction (LEED), and high resolution electron energy loss spectroscopy (HREELS). The sodium overlayer, despite the presence of an initial oxide contaminant, shows metallic character. Intentionally adsorbed oxygen is in a different chemical state than the initial oxygen contaminant and causes a reduction in the metallic character of the sodium. The sticking coefficient for oxygen on the sodium saturated surface is almost three times greater than for the bare Cu{11O} surface.

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