Surface Heterogeneity of SiO2 Polymorphs: An XPS Investigation of α-Quartz and α-Cristobalite

2014 ◽  
Vol 118 (45) ◽  
pp. 26249-26257 ◽  
Author(s):  
Cuihua Tang ◽  
Jianxi Zhu ◽  
Qing Zhou ◽  
Jingming Wei ◽  
Runliang Zhu ◽  
...  
Keyword(s):  
Surface Heterogeneity ◽  
Sio2 Polymorphs

Precise Droplet Manipulation Based on Surface Heterogeneity

2021 ◽  
Author(s):  
Huizeng Li ◽  
An Li ◽  
Zhipeng Zhao ◽  
Luanluan Xue ◽  
Mingzhu Li ◽  
...  
Keyword(s):  
Surface Heterogeneity ◽  
Droplet Manipulation

Towards the evaluation of regional ecosystem integrity using NDVI, brightness temperature and surface heterogeneity

2021 ◽  
pp. 148994
Author(s):  
Jakub Zelený ◽  
Daniel Mercado-Bettín ◽  
Felix Müller
Keyword(s):  
Brightness Temperature ◽  
Surface Heterogeneity ◽  
Ecosystem Integrity

Mixing and transport enhancement in microchannels by electrokinetic flows with charged surface heterogeneity

2021 ◽  
Vol 33 (4) ◽  
pp. 042006
Author(s):  
Yifei Guan ◽  
Tianhang Yang ◽  
Jian Wu
Keyword(s):  
Surface Heterogeneity ◽  
Charged Surface ◽  
Transport Enhancement ◽  
Electrokinetic Flows ◽  
Mixing And Transport

scholarly journals Effect of Different SiO2 Polymorphs on the Reaction Between SiO2 and SiC in Si Production

2021 ◽  
Vol 52 (2) ◽  
pp. 792-803
Author(s):  
Marit Buhaug Folstad ◽  
Eli Ringdalen ◽  
Halvard Tveit ◽  
Merete Tangstad
Keyword(s):  
Amorphous Silica ◽  
Reaction Rate ◽  
Reduction Reaction ◽  
Minor Effect ◽  
Target Temperature ◽  
Heating Rates ◽  
Significant Difference ◽  
Sio2 Polymorphs ◽  
A Minor ◽  
Final Composition

AbstractThis work investigates the phase transformations in silica (SiO2) during heating to a target temperature between 1700 °C and 1900 °C and the effect of SiO2 polymorphs on the reduction reaction 2SiO2 + SiC = 3SiO + CO in silicon production. Different heating rates up to target temperature have been used to achieve the different compositions of quartz, amorphous silica and cristobalite. The different heating rates had a minor effect on the final composition, and longer time at temperatures > 1400 °C were necessary to achieve greater variations in the final composition. Heating above the melting temperature gave more amorphous silica and less cristobalite, as amorphous silica also may form from β-cristobalite. Isothermal furnace experiments were conducted to study the extent of the reduction reaction. This study did not find any significant difference in the effects of quartz, amorphous silica or cristobalite. Increased temperature from 1700 °C to 1900 °C increased the reaction rate.

scholarly journals Effects of Surface Heterogeneity of α-Quartz and α-Cristobalite on Adsorption of Crystal Violet

ACS Omega ◽  
2021 ◽  
Author(s):  
Cuihua Tang ◽  
Huan Dong
Keyword(s):  
Crystal Violet ◽  
Surface Heterogeneity

Improved enzymatic activity by oriented immobilization on graphene oxide with tunable surface heterogeneity

2021 ◽  
Vol 216 ◽  
pp. 108788
Author(s):  
Wenfeng Zhou ◽  
Yuan Rao ◽  
Wei Zhuang ◽  
Lei Ge ◽  
Rijia Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Enzymatic Activity ◽  
Surface Heterogeneity ◽  
Oriented Immobilization

Study of surface heterogeneity and nitrogen functionalizing of biochars: Molecular modeling approach

Carbon ◽  
2021 ◽  
Vol 171 ◽  
pp. 161-170
Author(s):  
Hanieh Bamdad ◽  
Sadegh Papari ◽  
Stephanie MacQuarrie ◽  
Kelly Hawboldt
Keyword(s):  
Molecular Modeling ◽  
Surface Heterogeneity ◽  
Modeling Approach

Fractal dimensions from Q-TG data for estimation of surface heterogeneity

2003 ◽  
Vol 74 (2) ◽  
pp. 413-422 ◽  
Author(s):  
M. Matyjewicz ◽  
P. Staszczuk
Keyword(s):  
Fractal Dimensions ◽  
Surface Heterogeneity
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