Atomic Hydrogen - A Reagent for the Extraction of Chemical Species from Silicon Surfaces

1992 ◽  
Author(s):  
Jr. Yates ◽  
Cheng J. T. ◽  
Gao C. C. ◽  
Colaianni Q. ◽  
Choyke M. L. ◽  
...  
Keyword(s):  
Atomic Hydrogen ◽  
Chemical Species ◽  
Silicon Surfaces

The Role of Chemical Species in the Passivation of 〈100〉 Silicon Surfaces by HF in Water‐Ethanol Solutions

1996 ◽  
Vol 143 (12) ◽  
pp. 4059-4066 ◽  
Author(s):  
B. Garrido ◽  
J. Montserrat ◽  
J. R. Morante
Keyword(s):  
Chemical Species ◽  
Silicon Surfaces

Chemical Species Identification in an SEM by Changes in Emitted X-Ray Energies

1974 ◽  
Vol 32 ◽  
pp. 570-571
Author(s):  
R. H. Duff
Keyword(s):  
Species Identification ◽  
Valence Electron ◽  
Chemical Species ◽  
X Rays ◽  
Chemical Bonds ◽  
Small Shift ◽  
X Ray ◽  
Electron Transitions ◽  
Peak Energy ◽  
Chemical Combination

A material irradiated with electrons emits x-rays having energies characteristic of the elements present. Chemical combination between elements results in a small shift of the peak energies of these characteristic x-rays because chemical bonds between different elements have different energies. The energy differences of the characteristic x-rays resulting from valence electron transitions can be used to identify the chemical species present and to obtain information about the chemical bond itself. Although these peak-energy shifts have been well known for a number of years, their use for chemical-species identification in small volumes of material was not realized until the development of the electron microprobe.

Confocal Raman mapping

1992 ◽  
Vol 50 (2) ◽  
pp. 1514-1515
Author(s):  
J. Barbillat ◽  
M. Delhaye ◽  
P. Dhamelincourt
Keyword(s):  
Chemical Species ◽  
Diffraction Limit ◽  
Microscopic Level ◽  
Raman Mapping ◽  
Complete Spectrum ◽  
Laser Illumination ◽  
Ccd Detector ◽  
Raman Microprobe ◽  
Photodiode Array ◽  
Raman Image

Raman mapping, with a spatial resolution close to the diffraction limit, can help to reveal the distribution of chemical species at the surface of an heterogeneous sample.As early as 1975,three methods of sample laser illumination and detector configuration have been proposed to perform Raman mapping at the microscopic level (Fig. 1),:- Point illumination:The basic design of the instrument is a classical Raman microprobe equipped with a PM tube or either a linear photodiode array or a two-dimensional CCD detector. A laser beam is focused on a very small area ,close to the diffraction limit.In order to explore the whole surface of the sample,the specimen is moved sequentially beneath the microscope by means of a motorized XY stage. For each point analyzed, a complete spectrum is obtained from which spectral information of interest is extracted for Raman image reconstruction.- Line illuminationA narrow laser line is focused onto the sample either by a cylindrical lens or by a scanning device and is optically conjugated with the entrance slit of the stigmatic spectrograph.

Supersonic jet spectrometry of chemical species resulting from thermal decomposition of polystyrene and polycarbonate

1992 ◽  
Vol 64 (19) ◽  
pp. 931A-940A ◽  
Author(s):  
Totaro Imasaka ◽  
Masami Hozumi ◽  
Nobuhiko Ishibashi
Keyword(s):  
Thermal Decomposition ◽  
Supersonic Jet ◽  
Chemical Species

Longitudinal electronic and nuclear spin diffusion in atomic hydrogen

1985 ◽  
Vol 46 (8) ◽  
pp. 1335-1344 ◽  
Author(s):  
J.P. Bouchaud ◽  
C. Lhuillier
Keyword(s):  
Nuclear Spin ◽  
Atomic Hydrogen ◽  
Spin Diffusion

PHOTONS SHEDDING LIGHT UPON CHARGE EXCHANGE PROCESSES IN COLLISIONS OF 24 keV O3+ WITH ATOMIC HYDROGEN

1989 ◽  
Vol 50 (C1) ◽  
pp. C1-349-C1-352
Author(s):  
R. HOEKSTRA ◽  
K. BOORSMA ◽  
F. J . de HEER ◽  
R. MORGENSTERN
Keyword(s):  
Charge Exchange ◽  
Atomic Hydrogen ◽  
Exchange Processes
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