Long-term and thermal stability of hydrogen ion-passivated AlGaAs/GaAs near-surface quantum wells

1995 ◽  
Vol 13 (4) ◽  
pp. 1801 ◽  
Author(s):  
Ying-Lan Chang
Keyword(s):  
Thermal Stability ◽  
Quantum Wells ◽  
Hydrogen Ion ◽  
Near Surface ◽  
Thermal Stability Of

scholarly journals Co‐Evaporated MAPbI 3 : Excellent Intrinsic Long‐Term Thermal Stability of Co‐Evaporated MAPbI 3 Solar Cells at 85 °C (Adv. Funct. Mater. 22/2021)

2021 ◽  
Vol 31 (22) ◽  
pp. 2170155
Author(s):  
Herlina Arianita Dewi ◽  
Jia Li ◽  
Hao Wang ◽  
Bhumika Chaudhary ◽  
Nripan Mathews ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solar Cells ◽  
Thermal Stability Of

Model-free kinetics applied to evaluate the long-term thermal stability of three [NTf2] anion-based ionic liquids

2017 ◽  
Vol 656 ◽  
pp. 70-84 ◽  
Author(s):  
D. Blanco ◽  
P. Oulego ◽  
D. Ramos ◽  
B. Fernández ◽  
J.M. Cuetos
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Model Free ◽  
Model Free Kinetics ◽  
Thermal Stability Of

scholarly journals Changes in thermal stability of lignocelluloses waste aggregates long-term incorporated in composite

2021 ◽  
Vol 900 (1) ◽  
pp. 012042
Author(s):  
N Stevulova ◽  
A Estokova
Keyword(s):  
Thermal Stability ◽  
Alkaline Treatment ◽  
Cement Matrix ◽  
Scanning Calorimetry ◽  
Alkali Ions ◽  
Thermal Gravimetry ◽  
Pre Treatment ◽  
Surface Modified ◽  
Thermal Stability Of

Abstract This paper is addressed to comparative study of changes in thermal stability of surface-modified hemp-hurds aggregates long-term incorporated in bio-aggregate-based composites with the original ones before their integration into alternative binder matrix. In this study, the effectiveness of alkaline treatment of hemp hurds compared to the raw bio-aggregates as well as in relation to their behaviour when they are long-term incorporated in the MgO-cement environment is investigated. The differences in the thermal behaviour of the samples are explained by the changed structure of hemp hurds constituents due to the pre-treatment and long-term action of the alternative binder components on the bio-aggregates. Alkaline treatment increases thermal stability of hemp hurds compared to raw sample. Also long-term incorporation of hemp hurds in MgO-cement matrix had a similar effect in case of alkaline modified bio-aggregates. The more alkali ions present in the structure of hemp hurdssamples, the more ash is formed during their thermal decomposition studied by thermal gravimetry (TG) and differential scanning calorimetry (DSC).

Thermal Stability of Strained InGaAs/GaAs Single Quantum Wells

1989 ◽  
Vol 160 ◽  
Author(s):  
B. Elman ◽  
Emil S. Koteles ◽  
P. Melman ◽  
C.A. Armiento ◽  
C. Jagannath
Keyword(s):  
Thermal Stability ◽  
Quantum Wells ◽  
Molecular Beam ◽  
Critical Thickness ◽  
Single Quantum ◽  
Furnace Annealing ◽  
Low Dislocation Density ◽  
The Stability ◽  
Thermal Stability Of ◽  
Low Temperature Photoluminescence

AbstractWe present a study of the structural stability of InGaAs/GaAs strained single quantum wells (SQW) grown with a variety of indium compositions and with well widths close to critical thickness values. The samples were grown by molecular beam epitaxy and were subjected to furnace annealing as well as ion implantation followed by rapid thermal annealing. Changes in low temperature photoluminescence linewidths were used to evaluate the stability of strained SQWs. We observed both strain relief, in wide SQWs and strain recovery, in higher indium composition narrow quantum wells which were partially relaxed (low dislocation density) as-grown.

Thermal stability of a Stellite/steel hardfacing interface during long-term aging

2019 ◽  
Vol 154 ◽  
pp. 181-192 ◽  
Author(s):  
Yuxiao Wu ◽  
Etienne Bousser ◽  
Thomas Schmitt ◽  
Nabil Tarfa ◽  
Fadila Khelfaoui ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Stability Of

Long-term thermal stability of carbon fibre-reinforced addition-type polyimide composite in terms of compressive strength

2018 ◽  
Vol 28 (2) ◽  
pp. 115-133 ◽  
Author(s):  
Yuki Kubota ◽  
Takefumi Furuta ◽  
Takuya Aoki ◽  
Yuichi Ishida ◽  
Toshio Ogasawara ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Compressive Strength ◽  
Carbon Fibre ◽  
Thermal Stability Of

Long term thermal stability of organic PCMs

2014 ◽  
Vol 122 ◽  
pp. 11-16 ◽  
Author(s):  
S. Behzadi ◽  
M.M. Farid
Keyword(s):  
Thermal Stability ◽  
Thermal Stability Of

scholarly journals Role of Ionic Headgroups on the Thermal, Rheological, and Foaming Properties of Novel Betaine-Based Polyoxyethylene Zwitterionic Surfactants for Enhanced Oil Recovery

Processes ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 908 ◽  
Author(s):  
Muhammad Shahzad Kamal ◽  
Syed Muhammad Shakil Hussain ◽  
Lionel Talley Fogang
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Oil Recovery ◽  
Structural Changes ◽  
Foam Stability ◽  
Foaming Properties ◽  
Zwitterionic Surfactants ◽  
Reservoir Conditions ◽  
Thermal Stability Of

Long-term thermal stability of surfactants under harsh reservoir conditions is one of the main challenges for surfactant injection. Most of the commercially available surfactants thermally degrade or precipitate when exposed to high-temperature and high-salinity conditions. In this work, we designed and synthesized three novel betaine-based polyoxyethylene zwitterionic surfactants containing different head groups (carboxybetaine, sulfobetaine, and hydroxysulfobetaine) and bearing an unsaturated tail. The impact of the surfactant head group on the long-term thermal stability, foam stability, and surfactant–polymer interactions were examined. The thermal stability of the surfactants was assessed by monitoring the structural changes when exposed at high temperature (90 °C) for three months using 1H-NMR, 13C-NMR, and FTIR analysis. All surfactants were found thermally stable regardless of the headgroup and no structural changes were evidenced. The surfactant–polymer interactions were dominant in deionized water. However, in seawater, the surfactant addition had no effect on the rheological properties. Similarly, changing the headgroup of polyoxyethylene zwitterionic surfactants had no major effect on the foamability and foam stability. The findings of the present study reveal that the betaine-based polyoxyethylene zwitterionic surfactant can be a good choice for enhanced oil recovery application and the nature of the headgroup has no major impact on the thermal, rheological, and foaming properties of the surfactant in typical harsh reservoir conditions (high salinity, high temperature).

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