Vapor Phase Conversion Synthesis of Higher Manganese Silicide (MnSi1.75) Nanowire Arrays for Thermoelectric Applications

2013 ◽  
Vol 25 (4) ◽  
pp. 632-638 ◽  
Author(s):  
Ankit Pokhrel ◽  
Zachary P. Degregorio ◽  
Jeremy M. Higgins ◽  
Steven N. Girard ◽  
Song Jin
Keyword(s):  
Vapor Phase ◽  
Nanowire Arrays ◽  
Phase Conversion ◽  
Higher Manganese Silicide ◽  
Manganese Silicide

scholarly journals Single Crystalline Higher Manganese Silicide Nanowire Arrays with Outstanding Physical Properties through Double Tube Chemical Vapor Deposition

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1880
Author(s):  
Chin-Li Shen ◽  
Shu-Meng Yang ◽  
Kuo-Chang Lu
Keyword(s):  
Electron Microscopy ◽  
Chemical Vapor Deposition ◽  
Physical Properties ◽  
Vapor Deposition ◽  
Silicon Nanowire ◽  
Chemical Vapor ◽  
Nanowire Arrays ◽  
Higher Manganese Silicide ◽  
Single Crystalline ◽  
Manganese Silicide

In this work, we report a novel and efficient silicidation method to synthesize higher manganese silicide (HMS) nanowires with interesting characterization and physical properties. High density silicon nanowire arrays fabricated by chemical etching reacted with MnCl2 precursor through a unique double tube chemical vapor deposition (CVD) system, where we could enhance the vapor pressure of the precursor and provide stable Mn vapor with a sealing effect. It is crucial that the method enables the efficient formation of high quality higher manganese silicide nanowires without a change in morphology and aspect ratio during the process. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilized to characterize the HMS nanowires. High-resolution TEM studies confirm that the HMS nanowires were single crystalline Mn27Si47 nanowires of Nowotny Chimney Ladder crystal structures. Magnetic property measurements show that the Mn27Si47 nanowire arrays were ferromagnetic at room temperature with a Curie temperature of over 300 K, highly depending on the relationship between the direction of the applied electric field and the axial direction of the standing nanowire arrays. Field emission measurements indicate that the 20 μm long nanowires possessed a field enhancement factor of 3307. The excellent physical properties of the HMS nanowires (NWs) make them attractive choices for applications in spintronic devices and field emitters.

Selective Area Growth by Hydride Vapor Phase Epitaxy and Optical Properties of InAs Nanowire Arrays

2021 ◽  
Author(s):  
Gabin Grégoire ◽  
Mohammed Zeghouane ◽  
Curtis Goosney ◽  
Nebile Isik Goktas ◽  
Philipp Staudinger ◽  
...  
Keyword(s):  
Optical Properties ◽  
Vapor Phase ◽  
Vapor Phase Epitaxy ◽  
Nanowire Arrays ◽  
Hydride Vapor Phase Epitaxy ◽  
Selective Area Growth ◽  
Selective Area ◽  
Area Growth

Influence of the Sintering Temperature of Al-Doped Higher Manganese Silicide for Improved Thermoelectric Properties

2019 ◽  
Vol 19 (3) ◽  
pp. 1699-1703 ◽  
Author(s):  
Si-Young Son ◽  
Yeon-Jin Baek ◽  
Ji-Hyun Beck ◽  
Jong-Bae Kim ◽  
Seung-Ho Yang ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Sintering Temperature ◽  
Higher Manganese Silicide ◽  
Manganese Silicide

Vapor-phase conversion of aqueous 3-hydroxybutyric acid and crotonic acid to propylene over solid acid catalysts

2021 ◽  
Author(s):  
Shijie Leow ◽  
Andrew J. Koehler ◽  
Lauren E. Cronmiller ◽  
Xiangchen Huo ◽  
Gabriella D. Lahti ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Solid Acid ◽  
Flow Reactor ◽  
Crotonic Acid ◽  
Phase Conversion ◽  
Hydroxybutyric Acid ◽  
Continuous Flow Reactor ◽  
New Strategy ◽  
Silica Alumina ◽  
Fuels And Chemicals

Vapor phase conversion of 3-hydroxybutyric and crotonic acid to propylene in a continuous-flow reactor over silica–alumina and niobium catalysts demonstrates a new strategy for producing renewable fuels and chemicals from wastewater carbon.

THE CATALYTIC ACTION OF ALUMINUM SILICATES: III. THE CONVERSION OF 1,1-DIPHENYLETHANE TO STYRENE OVER MORDEN BENTONITE

1948 ◽  
Vol 26b (8) ◽  
pp. 581-591 ◽  
Author(s):  
R. V. V. Nicholls ◽  
Maurice Morton
Keyword(s):  
Water Vapor ◽  
Conversion Efficiency ◽  
Vapor Phase ◽  
Carbon Deposition ◽  
Hydrogenation Product ◽  
Reaction Products ◽  
Optimum Conditions ◽  
Phase Conversion ◽  
Vapor Velocity ◽  
Styrene Content

Optimum conditions for the vapor phase conversion of 1,1-diphenylethane to styrene and benzene over activated Morden bentonite have been found to be a temperature of 600 °C., rapid feed rates, and the use of water vapor as diluent. Ethylbenzene has been found in the reaction products as a hydrogenation product. Styrene content has been found to be dependent directly upon vapor velocity while the conversion efficiency was found to be related directly to the use of water vapor as an inhibitor of carbon deposition on the catalyst.

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