Measurement of surface charge on opposite sides of a planar insulator using an electrostatic probe

2004 ◽  
Vol 11 (6) ◽  
pp. 919-928 ◽  
Author(s):  
A. Kumada ◽  
S. Okabe
Keyword(s):  
Surface Charge ◽  
Electrostatic Probe

scholarly journals Surface Charge Measurement on Solid Dielectrics with an Electrostatic Probe

2003 ◽  
Vol 123 (10) ◽  
pp. 1051-1057 ◽  
Author(s):  
Akiyoshi Tatematsu ◽  
Kojiro Aoki ◽  
Shoji Hamada ◽  
Takuji Uemura ◽  
Tadasu Takuma
Keyword(s):  
Surface Charge ◽  
Charge Measurement ◽  
Electrostatic Probe ◽  
Solid Dielectrics

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.

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