In situ optical second harmonic monitoring of hydrogen adsorption and desorption kinetics during epitaxial growth on Si [001]

2005 ◽  
Author(s):  
X.F. Hu ◽  
Z. Xu ◽  
P.S. Parkinson ◽  
D. Lim ◽  
J.G. Eckerdt ◽  
...  
Keyword(s):  
Epitaxial Growth ◽  
Hydrogen Adsorption ◽  
Second Harmonic ◽  
Desorption Kinetics ◽  
Adsorption And Desorption

TOF-SARS study of hydrogen adsorption and desorption kinetics on Si(100)

Vacuum ◽  
2004 ◽  
Vol 73 (1) ◽  
pp. 73-78 ◽  
Author(s):  
A Kutana ◽  
T Ito ◽  
I.L Bolotin ◽  
B Makarenko ◽  
J.W Rabalais
Keyword(s):  
Hydrogen Adsorption ◽  
Desorption Kinetics ◽  
Adsorption And Desorption

Hydrogen adsorption and desorption on SiGe investigated by in situ surface infrared spectroscopy

1999 ◽  
Vol 343-344 ◽  
pp. 404-407 ◽  
Author(s):  
Fumihiko Hirose ◽  
Hitoshi Sakamoto ◽  
Miyako Terashi ◽  
Junko Kuge ◽  
Michio Niwano
Keyword(s):  
Infrared Spectroscopy ◽  
Hydrogen Adsorption ◽  
Adsorption And Desorption

In Situ Real-Time Diffuse Reflection Infrared Fourier Transform Spectroscopy (DRIFTS) Study of Hydrogen Adsorption and Desorption on Ir/SiO2 Catalyst

2012 ◽  
Vol 66 (5) ◽  
pp. 600-605 ◽  
Author(s):  
Gengshen Hu ◽  
Lin Zhu ◽  
Aiping Jia ◽  
Xin Hu ◽  
Guanqun Xie ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Noble Metals ◽  
Diffuse Reflection ◽  
Catalytic Mechanism ◽  
Hydrogen Adsorption ◽  
Fourier Transform Spectroscopy ◽  
Surface Species ◽  
Adsorption And Desorption ◽  
Heterogeneous Catalytic

The adsorption and desorption of hydrogen on Ir/SiO2 catalyst were studied by using in situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) combined with curve-fitting analysis. The results indicate that there are three different surface species formed on the catalyst that correspond to the peaks at 1950, 2010, and 2035 cm−1, respectively, when exposed in H2 flow at 130 °C. These surface species display different adsorption and desorption trends. Surface hydride forms after the catalyst is cooled to 80 °C and it disappears after the catalyst is heated to 130 °C again. This study may help us understand the interaction between hydrogen and noble metals and thus give more insights to heterogeneous catalytic mechanism involving hydrogen and hydrogen storage using metal materials.

Direct Observations of the Epitaxial Growth of Sputtered Ag on Si

1973 ◽  
Vol 31 ◽  
pp. 122-123
Author(s):  
J. S. Maa ◽  
Thos. E. Hutchinson
Keyword(s):  
Epitaxial Growth ◽  
Film Growth ◽  
Ion Beam ◽  
Ion Beam Sputtering ◽  
Microscopy Technique ◽  
Direct Observations ◽  
In Situ Electron Microscopy ◽  
Beam Sputtering ◽  
The Subject

The growth of Ag films deposited on various substrate materials such as MoS2, mica, graphite, and MgO has been investigated extensively using the in situ electron microscopy technique. The three stages of film growth, namely, the nucleation, growth of islands followed by liquid-like coalescence have been observed in both the vacuum vapor deposited and ion beam sputtered thin films. The mechanisms of nucleation and growth of silver films formed by ion beam sputtering on the (111) plane of silicon comprise the subject of this paper. A novel mode of epitaxial growth is observed to that seen previously.The experimental arrangement for the present study is the same as previous experiments, and the preparation procedure for obtaining thin silicon substrate is presented in a separate paper.

scholarly journals Achieving Good Protection on Ultra-High Molecular Weight Polythene by In Situ Growth of Amorphous Carbon Film

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 584
Author(s):  
Rui Dang ◽  
Liqiu Ma ◽  
Shengguo Zhou ◽  
Deng Pan ◽  
Bin Xia
Keyword(s):  
Molecular Weight ◽  
Epitaxial Growth ◽  
High Molecular Weight ◽  
Amorphous Carbon ◽  
Transition Layer ◽  
In Situ Growth ◽  
Good Protection ◽  
Ultra High Molecular Weight ◽  
Carbon Plasma

Ultra-high molecular weight polythene (UHMWPE), with outstanding characteristics, is widely applied in modern industry, while it is also severely limited by its inherent shortcomings, which include low hardness, poor wear resistance, and easy wear. Implementation of feasible protection on ultra-high molecular weight polythene to overcome its shortcomings would be of significance. In the present study, amorphous carbon (a-C) film was fabricated on ultra-high molecular weight polythene (UHMWPE) to provide good protection, and the relevant growth mechanism of a-C film was revealed by controlling carbon plasma currents. The results showed the in situ transition layer, in the form of chemical bonds, was formed between the UHMWPE substrate and the a-C film with the introduction of carbon plasma, which provided strong adhesion, and then the a-C film continued epitaxial growth on the in situ transition layer with the treatment of carbon plasma. This in situ growth of a-C film, including the in situ transition layer and the epitaxial growth layer, significantly improved the wetting properties, mechanical properties, and tribological properties of UHMWPE. In particular, good protection by in situ growth a-C film on UHMWPE was achieved during sliding wear.

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