Kelvin-probe microscopy as a technique of estimation of the charge traps saturation time

Abstract In this work, a method for estimating the saturation time of traps in dielectric layers based on the KPM is proposed. Using hafnium oxide layers as an example, it is shown that when charging with a series of points with different durations, a different dependence of the residual potential on time is observed. It is assumed that this technique makes it possible to evaluate the performance of devices based on dielectric layers.

Download Full-text

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

Microscopy and Microanalysis ◽

10.1017/s1431927604884538 ◽

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.

Download Full-text

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

ACS Applied Materials & Interfaces ◽

10.1021/acsami.7b19160 ◽

2018 ◽

Vol 10 (7) ◽

pp. 6755-6763 ◽

Cited By ~ 8

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

Download Full-text

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

MRS Proceedings ◽

10.1557/opl.2015.258 ◽

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.

Download Full-text