Metal overlayers on organic functional groups of self‐organized molecular assemblies. III. X‐ray photoelectron spectroscopy of Cr/CN on 12‐mercaptododecanenitrile and of Cr/CH3 on octadecanethiol at sample temperatures from 173 to 373 K

1994 ◽  
Vol 12 (4) ◽  
pp. 2402-2409 ◽  
Author(s):  
D. R. Jung ◽  
A. W. Czanderna
Keyword(s):  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Molecular Assemblies ◽  
X Ray ◽  
Self Organized ◽  
Organic Functional Groups ◽  
Metal Overlayers

Metal Overlayers on Self-Organized Molecular Assemblies: X-ray Photoelectron Spectroscopy of CR/CM and NI/CM on 12-Nercaptododecanenitrile

1993 ◽  
Vol 304 ◽  
Author(s):  
D. R. Jung ◽  
A. W. Czanderna
Keyword(s):  
Binding Energy ◽  
Photoelectron Spectroscopy ◽  
Chemical Interaction ◽  
Molecular Assemblies ◽  
X Ray ◽  
Self Organized ◽  
Deposited Metal ◽  
Show Evidence ◽  
Metal Overlayers ◽  
End Group

AbstractOverlayers of Cr and Ni deposited at 22 °C and at -100 °C onto self-organized molecular assemblies of HS(CH2 )11 CN on Au have been studied by X-ray photoelectron spectroscopy (XPS). For the lowest overlayer coverages, the C ls and N is core levels show evidence for a chemical interaction between the deposited metal and the CN end-group. At 22 °C and for coverages of 0.6 nm or more, Cr/CN shows a C ls low binding energy, carbide-like shoulder. The degree of metal penetration is assessed based on the attenuation of the C ls and Au 4f intensities, and on the positions of the Cr and Ni 2p levels. In general, the least penetration and the largest binding energy shifts of the C, N, and the Cr or Ni core levels are observed for Cr/CN, while and Ni/CN shows smaller shifts and greater penetration.

Application of X-ray Photoelectron Spectroscopy to the Study of Fiberglass Surfaces

1974 ◽  
Vol 28 (3) ◽  
pp. 219-222 ◽  
Author(s):  
Gary D. Nichols ◽  
David M. Hercules ◽  
Roy C. Peek ◽  
Dennis J. Vaughan
Keyword(s):  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Acid Treatment ◽  
X Ray ◽  
Organic Functional Groups ◽  
Glass Surfaces

The application of x-ray photoelectron spectroscopy (ESCA) to the study of fiberglass surfaces is reported. Qualitatively, ESCA has been used to show the change in concentration of elements at the surface when fiberglass is subjected to heat and/or acid treatment. Diffusion of calcium to the surface as a function of temperature has been studied. Similarly, leaching of aluminum by acid as a function of pH is reported. The ability of ESCA to detect organic functional groups attached to fiberglass surfaces has been demonstrated for nitrogen and sulfur. Fiberglass coated with organic groups having chelating properties has been shown to extract metals from solution. It has also been demonstrated that ESCA can follow reactions of organic functional groups on glass surfaces, namely sulfonation of an amine.

Formation of GaN Self-Organized Nanotips by Nanomasking Effect

2001 ◽  
Vol 707 ◽  
Author(s):  
Harumasa Yoshida ◽  
Tatsuhiro Urushido ◽  
Hideto Miyake ◽  
Kazumasa Hiramtsu
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Aspect Ratio ◽  
Formation Mechanism ◽  
High Aspect Ratio ◽  
Photoelectron Spectroscopy ◽  
Nanometer Scale ◽  
Xps Analysis ◽  
X Ray ◽  
Self Organized

ABSTRACTWe have successfully fabricated self-organized GaN nanotips by reactive ion etching using chlorine plasma, and have revealed the formation mechanism. Nanotips with a high density and a high aspect ratio have been formed after the etching. We deduce from X-ray photoelectron spectroscopy (XPS) analysis that the nanotip formation is attributed to nanometer-scale masks of SiO2 on GaN. The structures calculated by Monte Carlo simulation of our formation mechanism are very similar to the experimental nanotip structures.

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