Scanning Probe Analysis of Dielectrics on High Mobility Substrates

2012 ◽  
Keyword(s):  
High Mobility ◽  
Scanning Probe ◽  
Probe Analysis

(Invited) Scanning Probe Analysis of Dielectrics on High Mobility Substrates

2012 ◽  
Vol 45 (3) ◽  
pp. 69-78
Author(s):  
S. H. Olsen ◽  
R. Kapoor ◽  
S. J. Bull
Keyword(s):  
High Mobility ◽  
Scanning Probe ◽  
Probe Analysis

The Prospect of Spatially Accurate Reconstructed Atom Probe Data Using Experimental Emitter Shapes

2021 ◽  
pp. 1-9
Author(s):  
Jonathan Op de Beeck ◽  
Jeroen E. Scheerder ◽  
Brian P. Geiser ◽  
Joseph H. Bunton ◽  
Robert M. Ulfig ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Heterogeneous Systems ◽  
Compositional Analysis ◽  
Atom Probe ◽  
Scanning Probe ◽  
Spherical Cap ◽  
Essential Information ◽  
Probe Analysis ◽  
Actual Shape ◽  
Atom Probe Analysis

Reliable spatially resolved compositional analysis through atom probe tomography requires an accurate placement of the detected ions within the three-dimensional reconstruction. Unfortunately, for heterogeneous systems, traditional reconstruction protocols are prone to position some ions incorrectly. This stems from the use of simplified projection laws which treat the emitter apex as a spherical cap, although the actual shape may be far more complex. For instance, sampled materials with compositional heterogeneities are known to develop local variations in curvature across the emitter due to their material phase specific evaporation fields. This work provides three pivotal precursors to improve the spatial accuracy of the reconstructed volume in such cases. First, we show scanning probe microscopy enables the determination of the local curvature of heterogeneous emitters, thus providing the essential information for a more advanced reconstruction considering the actual shape. Second, we demonstrate the cyclability between scanning probe characterization and atom probe analysis. This is a key ingredient of more advanced reconstruction protocols whereby the characterization of the emitter topography is executed at multiple stages of the atom probe analysis. Third, we show advances in the development of an electrostatically driven reconstruction protocol which are expected to enable reconstruction based on experimental tip shapes.

Optical and Scanning Probe Analysis of Glycolipid Reorganization upon Concanavalin A Binding to Mannose-Coated Lipid Bilayers†

Langmuir ◽  
2003 ◽  
Vol 19 (5) ◽  
pp. 1829-1837 ◽  
Author(s):  
Bruce Bondurant ◽  
Julie A. Last ◽  
Tina A. Waggoner ◽  
Andrea Slade ◽  
Darryl Y. Sasaki
Keyword(s):  
Lipid Bilayers ◽  
Concanavalin A ◽  
Scanning Probe ◽  
Probe Analysis

Electrochemical scanning probe analysis used as a benchmark for carbon forms quality test

2021 ◽  
Vol 33 (11) ◽  
pp. 115002
Author(s):  
Gianlorenzo Bussetti ◽  
Rossella Yivlialin ◽  
Franco Ciccacci ◽  
Lamberto Duò ◽  
Eugenio Gibertini ◽  
...  
Keyword(s):  
Scanning Probe ◽  
Quality Test ◽  
Probe Analysis

Rapid Synthesis and Scanning Probe Analysis of BaxSr1-xTiO3 Composition Spread Films on a Temperature Gradient Si(100) Substrate

2002 ◽  
Vol 41 (Part 2, No. 2A) ◽  
pp. L149-L151 ◽  
Author(s):  
Hideki Minami ◽  
Kenji Itaka ◽  
Parhat Ahmet ◽  
Daisuke Komiyama ◽  
Toyohiro Chikyow ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Scanning Probe ◽  
Rapid Synthesis ◽  
Probe Analysis

Electron Probe Analysis of Muscle

1982 ◽  
Vol 40 ◽  
pp. 398-401
Author(s):  
A. V. Somlyo ◽  
H. Shuman ◽  
A. P. Somlyo
Keyword(s):  
Skeletal Muscle ◽  
Smooth Muscle ◽  
Sarcoplasmic Reticulum ◽  
Resting State ◽  
Binding Sites ◽  
Electron Probe ◽  
Frog Skeletal Muscle ◽  
Electron Probe Analysis ◽  
Probe Analysis

Electron probe analysis of frozen dried cryosections of frog skeletal muscle, rabbit vascular smooth muscle and of isolated, hyperpermeab1 e rabbit cardiac myocytes has been used to determine the composition of the cytoplasm and organelles in the resting state as well as during contraction. The concentration of elements within the organelles reflects the permeabilities of the organelle membranes to the cytoplasmic ions as well as binding sites. The measurements of [Ca] in the sarcoplasmic reticulum (SR) and mitochondria at rest and during contraction, have direct bearing on their role as release and/or storage sites for Ca in situ.

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

The use of a Bent Grid to Improve the take-Off Angle for Electron Probe Analysis

1976 ◽  
Vol 34 ◽  
pp. 360-361
Author(s):  
Delbert E. Philpott ◽  
David Leaffer
Keyword(s):  
Quantitative Analysis ◽  
Tilt Angle ◽  
Count Rate ◽  
Electron Probe ◽  
Open Area ◽  
Electron Probe Analysis ◽  
Background Ratio ◽  
Probe Analysis

There are certain advantages for electron probe analysis if the sample can be tilted directly towards the detector. The count rate is higher, it optimizes the geometry since only one angle need be taken into account for quantitative analysis and the signal to background ratio is improved. The need for less tilt angle may be an advantage because the grid bars are not moved quite as close to each other, leaving a little more open area for observation. Our present detector (EDAX) and microscope (Philips 300) combination precludes moving the detector behind the microscope where it would point directly at the grid. Therefore, the angle of the specimen was changed in order to optimize the geometry between the specimen and the detector.

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