Dynamic nanocrystal response and high temperature growth of carbon nanotube–ferroelectric hybrid nanostructure

Abstract We have isolated 440 mutants of Salmonella typhimurium that show temperature-sensitive growth on complex medium at 44 degrees. Approximately 16% of the mutations in these strains have been mapped to 17 chromosomal locations; two of these chromosomal locations seem to include several essential genes. Genetic analysis of the mutations suggests that the collection saturates the genes readily mutable to a ts lethal phenotype in S. typhimurium. Physiological characteristics of the ts lethal mutants were tested: 6% of the mutants can grow at high temperature under anaerobic conditions, 17% can grow when the medium includes 0.5 M KCl, and 9% of the mutants die after a 2-hr incubation at the nonpermissive temperature. Most ts lethal mutations in this collection probably affect genes required for growth at all temperatures (not merely during high temperature growth) since Tn10 insertions that cause a temperature-sensitive lethal phenotype are rare.

Download Full-text

Carbon nanotube reinforced ablative material for thermal protection system with superior resistance to high-temperature dense particle erosion

Aerospace Science and Technology ◽

10.1016/j.ast.2020.106234 ◽

2020 ◽

Vol 106 ◽

pp. 106234

Author(s):

MengFei Guo ◽

Jiang Li ◽

Kang Li ◽

Gen Zhu ◽

BoZhi Hu ◽

...

Keyword(s):

High Temperature ◽

Carbon Nanotube ◽

Thermal Protection ◽

Thermal Protection System ◽

Protection System ◽

Particle Erosion ◽

Dense Particle

Download Full-text

High temperature growth rate in MOCVD growth of AlGaAs

Journal of Crystal Growth ◽

10.1016/0022-0248(84)90413-5 ◽

1984 ◽

Vol 68 (1) ◽

pp. 169-175 ◽

Cited By ~ 9

Author(s):

Tetsuo Soga ◽

Yasuhito Takahashi ◽

Shiro Sakai ◽

Masayoshi Umeno

Keyword(s):

Growth Rate ◽

High Temperature ◽

Temperature Growth ◽

Mocvd Growth

Download Full-text

Silver particles modified carbon nanotube paper/glassfiber reinforced polymer composite material for high temperature infrared stealth camouflage

Carbon ◽

10.1016/j.carbon.2015.11.036 ◽

2016 ◽

Vol 98 ◽

pp. 557-566 ◽

Cited By ~ 25

Author(s):

Hetao Chu ◽

Zhichun Zhang ◽

Yanju Liu ◽

Jinsong Leng

Keyword(s):

Composite Material ◽

High Temperature ◽

Carbon Nanotube ◽

Polymer Composite ◽

Polymer Composite Material ◽

Silver Particles ◽

Reinforced Polymer

Download Full-text

The Influence of Growth Temperature on Oxygen Concentration in GaN Buffer Layer

MRS Proceedings ◽

10.1557/proc-1068-c03-09 ◽

2008 ◽

Vol 1068 ◽

Cited By ~ 1

Author(s):

Ewa Dumiszewska ◽

Wlodek Strupinski ◽

Piotr Caban ◽

Marek Wesolowski ◽

Dariusz Lenkiewicz ◽

...

Keyword(s):

High Temperature ◽

Buffer Layer ◽

Oxygen Concentration ◽

Growth Temperature ◽

Low Temperatures ◽

Buffer Layers ◽

Crystalline Quality ◽

Temperature Growth ◽

Gan Buffer Layer

ABSTRACTThe influence of growth temperature on oxygen incorporation into GaN epitaxial layers was studied. GaN layers deposited at low temperatures were characterized by much higher oxygen concentration than those deposited at high temperature typically used for epitaxial growth. GaN buffer layers (HT GaN) about 1 μm thick were deposited on GaN nucleation layers (NL) with various thicknesses. The influence of NL thickness on crystalline quality and oxygen concentration of HT GaN layers were studied using RBS and SIMS. With increasing thickness of NL the crystalline quality of GaN buffer layers deteriorates and the oxygen concentration increases. It was observed that oxygen atoms incorporated at low temperature in NL diffuse into GaN buffer layer during high temperature growth as a consequence GaN NL is the source for unintentional oxygen doping.

Download Full-text

Effect of Expanded Temperature on Microstructure of Carbon Nanotubes/Expanded Graphite Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.716.373 ◽

2013 ◽

Vol 716 ◽

pp. 373-378

Author(s):

Qian Zhang ◽

Xin Bao Gao ◽

Tian Peng Li

Keyword(s):

Carbon Nanotubes ◽

Composite Material ◽

High Temperature ◽

Carbon Nanotube ◽

Physical Adsorption ◽

Expanded Graphite ◽

Graphite Flake ◽

Graphite Composite ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Carbon nanotube/expanded graphite composite material was prepared by expanding the mixture of multi-walled carbon nanotubes and expansible graphite under the condition of high temperature. The microstructure and composition was studied by using SEM and XRD. The study shows that the tubular structure of carbon nanotubes in the composite material is changed by high temperature expanding process, and the microstructure is different with different expanding temperature. When the expanding temperature was 900°C, carbon nanotubes transformed, then attached to the surface of expanded graphite flake, so carbon nanotubes and expanding graphite combined strongly; globular carbon nanotubes attached to the surface of expanded graphite flake at the temperature of 700°C, both were combined much more strongly; carbon nanotubes retained the tube structure at the temperature of 500°C, combination was looser due to the simple physical adsorption. The result shows that the choice of expanding temperature has an important effect on microstructure of carbon nanotube/expanded graphite composite material.

Download Full-text