The Use of Low Temperature van der Waals Adsorption Isotherms in Determining the Surface Areas of Various Adsorbents

1937 ◽  
Vol 59 (12) ◽  
pp. 2682-2689 ◽  
Author(s):  
Stephen Brunauer ◽  
Paul H. Emmett
Keyword(s):  
Low Temperature ◽  
Adsorption Isotherms ◽  
Van Der Waals ◽  
Surface Areas

Low-temperature p-type ohmic contact to WSe2 using p+-MoS2/WSe2 van der Waals interface

2020 ◽  
Vol 117 (15) ◽  
pp. 153101
Author(s):  
Kei Takeyama ◽  
Rai Moriya ◽  
Kenji Watanabe ◽  
Satoru Masubuchi ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ohmic Contact ◽  
Van Der Waals ◽  
P Type

Synthesis and Characterization of Aerogel-derived Cation-substituted Hexaaluminates

1996 ◽  
Vol 457 ◽  
Author(s):  
Lin-chiuan Yan ◽  
Levi T. Thompson
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Catalytic Combustion ◽  
High Surface ◽  
High Surface Area ◽  
Synthesis And Characterization ◽  
New Methods ◽  
Surface Areas ◽  
Different Characteristics

ABSTRACTNew methods have been developed for the synthesis of high surface area cation-substituted hexaaluminates. These materials were prepared by calcining high temperature (ethanol extraction) or low temperature (CO2 extraction) aerogels at temperatures up to 1600°C. Cation-substituted hexaaluminates have emerged as promising catalysts for use in high temperature catalytic combustion. In comparing unsubstituted and cation-substituted hexaaluminates, we found that the phase transformations were much cleaner for the cation-substituted materials. BaCO3 and BaAl2O4 were intermediates during transformation of the unsubstituted materials, while the cation-substituted materials transformed directly from an amorphous phase to crystalline hexaaluminate. Moreover, the presence of substitution cations caused the transformation to occur at lower temperatures. Mn seems to be a better substitution cation than Co since the Mn-substituted materials exhibited higher surface areas and better heat resistances than the Co-substituted materials. The low temperature aerogel-derived materials possessed quite different characteristics from the high temperature aerogel-derived materials. For example, phase transformation pathways were different.

scholarly journals Low temperature epitaxy of tungsten–telluride heterostructure films

CrystEngComm ◽  
2019 ◽  
Vol 21 (22) ◽  
pp. 3409-3414 ◽  
Author(s):  
Paul Alexander Vermeulen ◽  
Jamo Momand ◽  
Bart Jan Kooi
Keyword(s):  
Low Temperature ◽  
Single Crystal ◽  
Pulsed Laser Deposition ◽  
Low Temperatures ◽  
Van Der Waals ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Low Temperature Epitaxy

Single-crystal like WTe2 films are grown by exploiting van der Waals epitaxy at low temperatures, using pulsed laser deposition.

Synthesis of Boron Nitride Coating on Graphene

2018 ◽  
Vol 281 ◽  
pp. 499-503
Author(s):  
Guo Xun Sun ◽  
Jian Qiang Bi ◽  
Wei Li Wang ◽  
Xu Xia Hao ◽  
Xi Cheng Gao ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Low Temperature ◽  
Boron Nitride ◽  
Oxidation Resistance ◽  
Ammonium Chloride ◽  
Sodium Borohydride ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Direct Reaction ◽  
Nitride Coating

A method to synthesize boron nitride (BN) coating on the surface of graphene has been developed. BN coating was synthesized by the direct reaction of sodium borohydride and ammonium chloride at a relatively low temperature of 600 °C. Synthesized sample was characterized by RAM, XRD, FESEM, TEM and XPS. It is revealed that the BN coating combines with graphene through van der Waals interactions, and the elements B and N distribute homogeneously on the surface of graphene. Thermogravimetric analysis showed that the oxidation resistance of the graphene was improved after being coated with BN.

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