Optical properties of silica glasses having O2 and Cl2 molecules

1991 ◽  
Vol 244 ◽  
Author(s):  
Koichi Awazu ◽  
Hiroshi Kawazoe ◽  
Ken-ichi Muta
Keyword(s):  
Optical Properties ◽  
Absorption Band ◽  
Gas Phase ◽  
Excimer Laser ◽  
Silica Glasses ◽  
Minor Fraction ◽  
Image Position ◽  
A Minor

ABSTRACTOxygen or chlorine was incorporated into silica glasses by sintering porous soot rods under 02/He or C12/He atmosphere. In case of oxygen, the Schumann-Runge band of 02 molecule was found in VUV region. An absorption band at 4. 8eV having 1. 9eV emission was generated with irradiation of excimer laser. We proposed that such optical properties were due to 02 molecule trapped in glass because they were similar to photochemistry of 02 molecule in the gas phase which could be shown as:When silica glasses were fabricated under chlorine ambient, a minor fraction was found to be present as Cl2 molecule trapped in the glass, which gives the absorption band at 3.8eV.

Residual Gas Reactions in the Electron Microscope: I. Qualitative Observations on the Water Gas Reaction

1968 ◽  
Vol 26 ◽  
pp. 292-293
Author(s):  
Richard E. Hartman ◽  
Roberta S. Hartman ◽  
Peter L. Ramos
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Gas Phase ◽  
Absolute Temperature ◽  
Residual Gas ◽  
Gas Reactions ◽  
Image Position ◽  
The Right ◽  
Water Gas ◽  
Thinning Rate

The action of water and the electron beam on organic specimens in the electron microscope results in the removal of oxidizable material (primarily hydrogen and carbon) by reactions similar to the water gas reaction .which has the form:The energy required to force the reaction to the right is supplied by the interaction of the electron beam with the specimen.The mass of water striking the specimen is given by:where u = gH2O/cm2 sec, PH2O = partial pressure of water in Torr, & T = absolute temperature of the gas phase. If it is assumed that mass is removed from the specimen by a reaction approximated by (1) and that the specimen is uniformly thinned by the reaction, then the thinning rate in A/ min iswhere x = thickness of the specimen in A, t = time in minutes, & E = efficiency (the fraction of the water striking the specimen which reacts with it).

Influence of Al/Er ratio on the optical properties and structures of Er3+/ Al3+ co-doped silica glasses

2021 ◽  
Vol 129 (5) ◽  
pp. 053104
Author(s):  
Yan Jiao ◽  
Mengting Guo ◽  
Renle Wang ◽  
Chongyun Shao ◽  
Lili Hu
Keyword(s):  
Optical Properties ◽  
Silica Glasses ◽  
Co Doped

Optical properties of defects in nitride semiconductors

2015 ◽  
Vol 30 (20) ◽  
pp. 2977-2990 ◽  
Author(s):  
Ingo Tischer ◽  
Matthias Hocker ◽  
Benjamin Neuschl ◽  
Manfred Madel ◽  
Martin Feneberg ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nitride Semiconductors ◽  
Image Position

Abstract

Sol–gel synthesis and optical properties of size controlled Indium Arsenide nanocrystals embedded in silica glasses

2005 ◽  
Vol 280 (3-4) ◽  
pp. 521-529 ◽  
Author(s):  
Heqing Yang ◽  
Banglao Zhang ◽  
Xiaoguang Wang ◽  
Xingjun Wang ◽  
Tie Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Indium Arsenide ◽  
Sol Gel ◽  
Silica Glasses ◽  
Sol Gel Synthesis ◽  
Size Controlled

scholarly journals Resists Using the Absorption Band Shift Method for ArF Excimer Laser Lithography.

1998 ◽  
Vol 11 (3) ◽  
pp. 489-492
Author(s):  
Takeshi Okino ◽  
Koji Asakawa ◽  
Naomi Shida ◽  
Tohru Ushirogouchi
Keyword(s):  
Absorption Band ◽  
Excimer Laser ◽  
Band Shift ◽  
Shift Method ◽  
Laser Lithography ◽  
Arf Excimer Laser

Electrical and optical properties of ITO films deposited by excimer-laser-assisted EB method

1999 ◽  
Author(s):  
Tetsuo Yano ◽  
Masafumi Yoneda ◽  
Toshihiko Ooie ◽  
Munehide Katsumura ◽  
Yoshifumi Suzaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excimer Laser ◽  
Electrical And Optical Properties ◽  
Ito Films

scholarly journals Optogenetic Modulation of a Minor Fraction of Parvalbumin-Positive Interneurons Specifically Affects Spatiotemporal Dynamics of Spontaneous and Sensory-Evoked Activity in Mouse Somatosensory Cortex in Vivo

2017 ◽  
Vol 27 (12) ◽  
pp. 5784-5803 ◽  
Author(s):  
Jenq-Wei Yang ◽  
Pierre-Hugues Prouvot ◽  
Vicente Reyes-Puerta ◽  
Maik C Stüttgen ◽  
Albrecht Stroh ◽  
...  
Keyword(s):  
Somatosensory Cortex ◽  
Spatiotemporal Dynamics ◽  
Minor Fraction ◽  
Evoked Activity ◽  
Sensory Evoked ◽  
A Minor

scholarly journals Kinetics of the reactions of isoprene-derived hydroxynitrates: gas phase epoxide formation and solution phase hydrolysis

2014 ◽  
Vol 14 (8) ◽  
pp. 12121-12165 ◽  
Author(s):  
M. I. Jacobs ◽  
W. J. Burke ◽  
M. J. Elrod
Keyword(s):  
Gas Phase ◽  
Hydrolysis Rate ◽  
Ionization Mass ◽  
Volatile Organic ◽  
Isoprene Oxidation ◽  
Gas Phase Oxidation ◽  
Acid Catalyzed ◽  
Regional Formation ◽  
A Minor ◽  
Kinetics Of

Abstract. Isoprene, the most abundant non-methane volatile organic compound (VOC) emitted into the atmosphere, is known to undergo gas phase oxidation to form eight different hydroxynitrate isomers in "high NOx" environments. These hydroxynitrates are known to affect the global and regional formation of ozone and secondary organic aerosol (SOA), as well as affect the distribution of nitrogen. In the present study, we have synthesized three of the eight possible hydroxynitrates: 4-hydroxy-3-nitroxy isoprene (4,3-HNI) and E/Z-1-hydroxy-4-nitroxy isoprene (1,4-HNI). Oxidation of the 4,3-HNI isomer by the OH radical was monitored using a flow tube chemical ionization mass spectrometer (FT-CIMS), and its OH rate constant was determined to be (3.64 ± 0.41) × 10−11 cm3 molecule−1 s−1. The products of 4,3-HNI oxidation were monitored, and a mechanism to explain the products was developed. An isoprene epoxide (IEPOX) – a species important in SOA chemistry and thought to originate only from "low NOx" isoprene oxidation – was found as a minor, but significant product. Additionally, hydrolysis kinetics of the three synthesized isomers were monitored with NMR. The bulk, neutral solution hydrolysis rate constants for 4,3-HNI and the 1,4-HNI isomers were (1.59±0.03 × 10−5 s−1 and (6.76 ± 0.09) × 10−3 s−1, respectively. The hydrolysis reactions of each isomer were found to be general acid-catalyzed. The reaction pathways, product yields and atmospheric implications for both the gas phase and aerosol-phase reactions are discussed.

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