scholarly journals Direct observation of the CVD growth of monolayer MoS2 using in situ optical spectroscopy

2019 ◽  
Vol 10 ◽  
pp. 557-564 ◽  
Author(s):  
Claudia Beatriz López-Posadas ◽  
Yaxu Wei ◽  
Wanfu Shen ◽  
Daniel Kahr ◽  
Michael Hohage ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Spectroscopy ◽  
Chemical Vapor ◽  
Semiconductor Materials ◽  
Transition Metal Dichalcogenide ◽  
Monolayer Mos2 ◽  
In Situ Study ◽  
Sapphire Substrates ◽  
Cvd Growth

Real-time monitoring is essential for understanding and precisely controlling of growth of two-dimensional transition metal dichalcogenide (2D TMDC) materials. However, it is very challenging to carry out such studies during chemical vapor deposition (CVD). Here, we report the first, real time, in situ study of the CVD growth of 2D TMDCs. More specifically, the CVD growth of a molybdenum disulfide (MoS2) monolayer on sapphire substrates has been monitored in situ using differential transmittance spectroscopy (DTS). The growth of the MoS2 monolayer can be precisely followed by observation of the evolution of the characteristic optical features. Consequently, a strong correlation between the growth rate of the MoS2 monolayer and the temperature distribution in the CVD reactor has been revealed. Our results demonstrate the great potential of real time, in situ optical spectroscopy to assist the precisely controlled growth of 2D semiconductor materials.

In Situ Observation of Nucleation and Growth of Carbon Nanotubes from Iron Carbide Nanoparticles

2008 ◽  
Vol 1142 ◽  
Author(s):  
Hideto Yoshida ◽  
Seiji Takeda ◽  
Tetsuya Uchiyama ◽  
Hideo Kohno ◽  
Yoshikazu Homma
Keyword(s):  
Carbon Nanotubes ◽  
Iron Carbide ◽  
Bulk Diffusion ◽  
Chemical Vapor ◽  
Nucleation And Growth ◽  
Atomic Scale ◽  
In Situ Observation ◽  
Transmission Electron ◽  
Cvd Growth

ABSTRACTNucleation and growth processes of carbon nanotubes (CNTs) in iron catalyzed chemical vapor deposition (CVD) have been observed by means of in-situ environmental transmission electron microscopy. Our atomic scale observations demonstrate that solid state iron carbide (Fe3C) nanoparticles act as catalyst for the CVD growth of CNTs. Iron carbide nanoparticles are structurally fluctuated in CVD condition. Growth of CNTs can be simply explained by bulk diffusion of carbon atoms since nanoparticles are carbide.

scholarly journals Real-time in-situ Investigation of III-V Nanowire Growth using Custom-designed Hybrid Chemical Vapor Deposition-TEM

2017 ◽  
Vol 23 (S1) ◽  
pp. 1716-1717 ◽  
Author(s):  
Kimberly Dick Thelander ◽  
L. Reine Wallenberg ◽  
Axel R. Persson ◽  
Marcus Tornberg ◽  
Daniel Jacobsson ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Real Time ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Nanowire Growth ◽  
In Situ Investigation

Chemical Vapor Deposition of Diamond:  An in Situ Study by Vibrational Spectroscopy

2001 ◽  
Vol 123 (27) ◽  
pp. 6732-6733 ◽  
Author(s):  
Arndt Heerwagen ◽  
Martin Strobel ◽  
Michael Himmelhaus ◽  
Manfred Buck
Keyword(s):  
Chemical Vapor Deposition ◽  
Vibrational Spectroscopy ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
In Situ Study

scholarly journals A multimodal instrument for real-time in situ study of ultrasound and cavitation mediated drug delivery

2017 ◽  
Vol 88 (3) ◽  
pp. 034302 ◽  
Author(s):  
Shuning Bian ◽  
Anjali Seth ◽  
Dan Daly ◽  
Robert Carlisle ◽  
Eleanor Stride
Keyword(s):  
Drug Delivery ◽  
Real Time ◽  
In Situ Study

Monitoring the reactivity of Ag nanoparticles for different atmospheres by using in situ and real-time optical spectroscopy

2011 ◽  
Author(s):  
V. Antad ◽  
L. Simonot ◽  
D. Babonneau ◽  
S. Camelio ◽  
F. Pailloux ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Spectroscopy ◽  
Ag Nanoparticles
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