scholarly journals Influence of the aluminum content on the luminescent and electronic properties of β-Ga2O3

2021 ◽  
Vol 2103 (1) ◽  
pp. 012167
Author(s):  
E V Dementeva ◽  
P A Dementev ◽  
A V Kremleva ◽  
D Y Panov ◽  
A E Romanov ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Elemental Composition ◽  
Aluminum Content ◽  
Czochralski Method ◽  
Electrophysical Properties ◽  
Kelvin Probe ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy

Abstract In this work, we investigated bulk β-Ga2O3 samples grown by the Czochralski method on Al2O3 and β-Ga2O3 seeds. The elemental composition of the samples and its effect on the luminescent and electrophysical properties of the samples were determined. The Kelvin probe microscopy was used to study the processes of localization and dissipation of charges in the samples. It was shown that in a β-Ga2O3 sample grown on an Al2O3 seed, the characteristic charge dissipation time is 10 times longer.

Polarization Effects in Graded AlGaN Nanolayers Revealed by Current-Sensing and Kelvin Probe Microscopy

2018 ◽  
Vol 10 (7) ◽  
pp. 6755-6763 ◽  
Author(s):  
Petro M. Lytvyn ◽  
Andrian V. Kuchuk ◽  
Yuriy I. Mazur ◽  
Chen Li ◽  
Morgan E. Ware ◽  
...  
Keyword(s):  
Kelvin Probe ◽  
Current Sensing ◽  
Polarization Effects ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy

Determination of the Physical Properties of Oil Sands Components using Scanning Probe Microscopy

2015 ◽  
Vol 1754 ◽  
pp. 69-74
Author(s):  
Ravi Gaikwad ◽  
Tinu Abraham ◽  
Aharnish Hande ◽  
Fatemeh Bakhtiari ◽  
Siddhartha Das ◽  
...  
Keyword(s):  
Oil Sands ◽  
Structural Changes ◽  
Rational Approach ◽  
Kelvin Probe ◽  
Scanning Calorimetry ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy ◽  
Force Microscopy ◽  
Atomic Force

ABSTRACTAtomic force microscopy is employed to study the structural changes in the morphology and physical characteristics of asphaltene aggregates as a function of temperature. The exotic fractal structure obtained by evaporation-driven asphaltene aggregates shows an interesting dynamics for a large range of temperatures from 25°C to 80°C. The changes in the topography, surface potential and adhesion are unnoticeable until 70°C. However, a significant change in the dynamics and material properties is displayed in the range of 70°C - 80°C, during which the aspahltene aggregates acquire ‘liquid-like’ mobility and fuse together. This behaviour is attributed to the transition from the pure amorphous phase to a crystalline liquid phase which occurs at approximately 70°C as shown by using Differential Scanning Calorimetry (DSC). Additionally, the charged nature of asphaltenes and bitumen is also explored using kelvin probe microscopy. Such observations can lead to the development of a rational approach to the fundamental understanding of asphaltene aggregation dynamics and may help in devising novel techniques for the handling and separation of asphaltene aggregates using dielectrophoretic methods.

Localized charge imaging with scanning Kelvin probe microscopy

2016 ◽  
Vol 28 (2) ◽  
pp. 025703 ◽  
Author(s):  
M F Orihuela ◽  
A M Somoza ◽  
J Colchero ◽  
M Ortuño ◽  
E Palacios-Lidón
Keyword(s):  
Kelvin Probe ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy ◽  
Scanning Kelvin Probe

Quantitative amplitude-modulation scanning Kelvin probe microscopy via the second eigenmode excitation

2021 ◽  
pp. 113399
Author(s):  
Junqi Lai ◽  
Cheng Wang ◽  
Zhiwei Xing ◽  
Shulong Lu ◽  
Qi Chen ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Kelvin Probe ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy ◽  
Scanning Kelvin Probe

More Than a Surface Probe: Investigation of Subsurface Charging in Buried Oxide Layers in Silicon Using Kelvin Probe Microscopy

2004 ◽  
Vol 10 (S02) ◽  
pp. 1090-1091
Author(s):  
Marion A. Stevens-Kalceff
Keyword(s):  
Kelvin Probe ◽  
Oxide Layers ◽  
Probe Microscopy ◽  
Kelvin Probe Microscopy ◽  
Buried Oxide ◽  
Surface Probe ◽  
Probe Investigation

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

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