Hydrogen Bonding and Microvoid Stability in a-Si:H

1994 ◽  
Vol 336 ◽  
Author(s):  
M. J. Van Den Boogaard ◽  
A. C. Van Der Steege ◽  
W. G. J. H. M. Van Sark ◽  
W. F. Van Der Weg
Keyword(s):  
Heat Treatment ◽  
Hydrogen Bonding ◽  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Atomic Hydrogen ◽  
Infrared Absorption Spectrum ◽  
Internal Surfaces ◽  
Initial Stage

ABSTRACTWe have annealed PECVD a-Si:H films at 250, 300, and 350°C and measured the evolution of the infrared absorption spectrum. We observe that, during the initial stage of such a heat treatment, atomic hydrogen migrates from the isolated state to the clustered state. Thus diffusion of atomic hydrogen must occur around 300°C. Microvoids with internal surfaces covered with SiH bonds appear to be more stable than voids lined with SiH2 bonds and (SiH2)n polymers.

The Influence of Ethanol Extraction in the High Temperature Steaming Induced Discoloration Process of Locust (Robinia pseudoacacia) Wood

2012 ◽  
Vol 538-541 ◽  
pp. 2194-2198
Author(s):  
Peng Zhang ◽  
Yong Ming Fan ◽  
Jian Min Gao
Keyword(s):  
Heat Treatment ◽  
Absorption Spectrum ◽  
Aromatic Ring ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Robinia Pseudoacacia ◽  
Treated Wood ◽  
Decomposition Reaction ◽  
Ether Bond ◽  
Heat Treated

The purpose of the experiment is to get more ideal color and raise the value of Locust wood after heat treatment. We chose ethanol as the solvent and heated locust wood in vapor environment at 120°C for 24 hours. Compare the infrared absorption spectrum of heat treated powder and heat treated powder after extracted. It turned out that: (1) extraction could wipe out the great mass of substance with ethenyl(C=C), ether bond(C-O-C), hydroxy (-OH) and aromatic ring; (2) The synthetic reaction and decomposition reaction of ethenyl(C=C), ether bond(C-O-C), hydroxy (-OH) and aromatic ring would lead to decrease of b* and rise of a*, but have no impact on L*;(3) Heat treatment would reduce the number of aromatic nucleus. Hydroxyl would be oxidized to carbonyl group. Instauration organic esters produced. Heat treated wood after extracted wouldn’t occur these reaction. Powder’s infrared absorption spectrum also shows that functional group in aromatic ring has decreased after extraction and heat treated.

Infrared absorption spectrum of vanadyl pentaammoniate

1971 ◽  
Vol 15 (4) ◽  
pp. 1349-1351
Author(s):  
L. V. Kobets ◽  
N. I. Vorob'ev ◽  
V. V. Pechkovskii ◽  
A. I. Komyak
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum

The infrared absorption spectrum of 18O-labelled nitrobenzene

1964 ◽  
Vol 20 (2) ◽  
pp. 179-185 ◽  
Author(s):  
S. Pinchas ◽  
D. Samuel ◽  
B.L. Silver
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum
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