Origin of surface potential change during ferroelectric switching in epitaxial PbTiO3 thin films studied by scanning force microscopy

2009 ◽  
Vol 94 (3) ◽  
pp. 032907 ◽  
Author(s):  
Yunseok Kim ◽  
Changdeuck Bae ◽  
Kyunghee Ryu ◽  
Hyoungsoo Ko ◽  
Yong Kwan Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Potential ◽  
Scanning Force Microscopy ◽  
Potential Change ◽  
Force Microscopy ◽  
Scanning Force ◽  
Ferroelectric Switching

scholarly journals Nanostructuring and Hardness Investigations of Thin Films by Scanning Force Microscopy

1998 ◽  
Vol 93 (2) ◽  
pp. 437-441
Author(s):  
M. Nowicki ◽  
A. Richter ◽  
R. Ries ◽  
M. Oszwałdowski
Keyword(s):  
Thin Films ◽  
Scanning Force Microscopy ◽  
Force Microscopy ◽  
Scanning Force

scholarly journals Tribology studies of organic thin films by scanning force microscopy

1996 ◽  
Author(s):  
G. Bar ◽  
S. Rubin ◽  
A.N. Parikh ◽  
B.I. Swanson ◽  
T.A. Zawodzinski
Keyword(s):  
Thin Films ◽  
Organic Thin Films ◽  
Scanning Force Microscopy ◽  
Force Microscopy ◽  
Scanning Force

Uranium Hydride Formation Study as Observed by Scanning Surface Potential Imaging

2006 ◽  
Vol 986 ◽  
Author(s):  
Marilyn E. Hawley ◽  
Mary Ann Hill ◽  
Yongqiang Wang ◽  
Roland K. Schulze
Keyword(s):  
Surface Potential ◽  
Nuclear Power ◽  
Scanning Force Microscopy ◽  
Hydrogen Gas ◽  
Pure Hydrogen ◽  
Force Microscopy ◽  
Chemical Impurities ◽  
Conventional Weapons ◽  
Scanning Force ◽  
Materials Failure

AbstractUranium is an extremely important material for commercial and military applications (i.e. nuclear power, nuclear weapons, conventional weapons, and armor systems) and, like a number of other materials, is vulnerable to corrosion by environmental gases that affect their properties, leading to component degradation, shortened lifetimes and materials failure. For uranium this is particularly true in the case of corrosion by hydrogen. A fundamental understanding of the corrosion process at the nucleation stage is of critical importance. The goal of this work is to study the role of common chemical impurities in uranium with initiation sites for the formation of destructive hydride blisters. Samples were implanted with various ions, annealed under vacuum at 200°C, than exposed to one atm of ultra-pure hydrogen. Scanning force microscopy surface potential imaging was used to characterize the structure and corresponding electrical properties of polycrystalline uranium surfaces that resulted from the implantation of different suspect atoms after exposure to hydrogen gas. Surface potential images revealed features related to different oxide structures and hydride spots/blisters as well as other features not obvious in the corresponding topograph. In the surface potential images, blisters appear as bright (higher potential) features in sharp contrast to the uranium oxide background. Often a possible inclusion was observed in the center of a blister. Blister formation did not appear to correlate with implantation of any specific specie, however, distinct differences were seen between implanted and non implanted sides of the same sample.

Unconventional nanotubes self-assembled in alumina channels: morphology and surface potential of isolated nanostructures at surfaces

2007 ◽  
Vol 365 (1855) ◽  
pp. 1577-1588 ◽  
Author(s):  
Vincenzo Palermo ◽  
Andrea Liscio ◽  
Anna Maria Talarico ◽  
Linjie Zhi ◽  
Klaus Müllen ◽  
...  
Keyword(s):  
Surface Potential ◽  
Scanning Force Microscopy ◽  
Kelvin Probe ◽  
Alumina Membrane ◽  
Flat Surfaces ◽  
Force Microscopy ◽  
Scanning Force ◽  
Self Assembled ◽  
Microscopy Characterization

Synthetic nanographenes have been self-assembled from solution on the surface of nanometric channels of an alumina membrane template. By controlling the interplay between intermolecular and interfacial interactions, the molecules have been adsorbed either ‘face-on’ or ‘edge-on’ on the pore's surfaces, leading to the formation of columnar stacks in the latter case. Upon thermal treatment at high temperature, the molecular cross-linking of the columns has been triggered, transforming the delicate supramolecular arrangement into robust carbon nanotubes, with the graphitic planes at predetermined orientations with respect to the tube axis. Scanning force microscopy characterization of single nanotubes deposited from suspensions on mica showed that the nanotubes can self-assemble on flat surfaces adopting preferential alignments which reflect the threefold symmetry of the mica substrate. Kelvin probe force microscopy studies revealed that the nanotubes possess a surface potential much smaller than the work function of both graphite and conventional vacuum-processed nanotubes, providing evidence for their more confined electronic structure.

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