Ultrahigh vacuum STM studies of the Bi–O surface of Bi2212

Observations of the Bi–O surface of superconductive Bi2212 single crystals were carried out using an ultrahigh-vacuum scanning tunneling microscope (UHV-STM). In the atomic resolution images, surface corrugations, which correspond to the superstructure of the Bi–O surface in addition to Bi atom deficiencies, were observed. There were hollow lines along the ridges of the corrugations, which may be due to missing atom rows.

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An atomic resolution scanning tunneling microscope that applies external tensile stress and strain in an ultrahigh vacuum

Nanotechnology ◽

10.1088/0957-4484/19/02/025705 ◽

2007 ◽

Vol 19 (2) ◽

pp. 025705 ◽

Cited By ~ 11

Author(s):

D Fujita ◽

M Kitahara ◽

K Onishi ◽

K Sagisaka

Keyword(s):

Tensile Stress ◽

Scanning Tunneling Microscope ◽

Ultrahigh Vacuum ◽

Atomic Resolution ◽

Scanning Tunneling ◽

Stress And Strain ◽

Tunneling Microscope

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In situ cleavage mechanism for semiconductor single crystals for ultrahigh-vacuum scanning tunneling microscope

Instruments and Experimental Techniques ◽

10.1134/s0020441207010198 ◽

2007 ◽

Vol 50 (1) ◽

pp. 129-132 ◽

Cited By ~ 1

Author(s):

S. I. Oreshkin ◽

V. N. Mantsevich ◽

D. A. Muzychenko ◽

A. I. Oreshkin ◽

V. I. Panov ◽

...

Keyword(s):

Single Crystals ◽

Scanning Tunneling Microscope ◽

Ultrahigh Vacuum ◽

Scanning Tunneling ◽

Tunneling Microscope

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Scanning tunneling microscopy of E. coli RNA polymerase deposited onto an Au substrate by an electrochemical process

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100086192 ◽

1991 ◽

Vol 49 ◽

pp. 378-379

Author(s):

Rebecca W. Keller ◽

Carlos Bustamante ◽

David Bear

Keyword(s):

Scanning Tunneling Microscope ◽

Biological Sample ◽

Substrate Surface ◽

Electrochemical Process ◽

Atomic Resolution ◽

Scanning Tunneling ◽

Tunneling Microscopy ◽

Tunneling Microscope ◽

E Coli ◽

Preparation Techniques

Under ideal conditions, the Scanning Tunneling Microscope (STM) can create atomic resolution images of different kinds of samples. The STM can also be operated in a variety of non-vacuum environments. Because of its potentially high resolution and flexibility of operation, it is now being applied to image biological systems. Several groups have communicated the imaging of double and single stranded DNA.However, reproducibility is still the main problem with most STM results on biological samples. One source of irreproducibility is unreliable sample preparation techniques. Traditional deposition methods used in electron microscopy, such as glow discharge and spreading techniques, do not appear to work with STM. It seems that these techniques do not fix the biological sample strongly enough to the substrate surface. There is now evidence that there are strong forces between the STM tip and the sample and, unless the sample is strongly bound to the surface, it can be swept aside by the tip.

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STM of freeze-fracture replicas: Problems and promises

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100146187 ◽

1993 ◽

Vol 51 ◽

pp. 68-69

Author(s):

J. T. Woodward ◽

J. A. N. Zasadzinski

Keyword(s):

Scanning Tunneling Microscope ◽

Organic Materials ◽

Freeze Fracture ◽

Atomic Resolution ◽

Scanning Tunneling ◽

Tunneling Microscope ◽

Molecular Scale ◽

Organic Surfaces ◽

Metal Layers ◽

Conductive Surfaces

The Scanning Tunneling Microscope (STM) offers exciting new ways of imaging surfaces of biological or organic materials with resolution to the sub-molecular scale. Rigid, conductive surfaces can readily be imaged with the STM with atomic resolution. Unfortunately, organic surfaces are neither sufficiently conductive or rigid enough to be examined directly with the STM. At present, nonconductive surfaces can be examined in two ways: 1) Using the AFM, which measures the deflection of a weak spring as it is dragged across the surface, or 2) coating or replicating non-conductive surfaces with metal layers so as to make them conductive, then imaging with the STM. However, we have found that the conventional freeze-fracture technique, while extremely useful for imaging bulk organic materials with STM, must be modified considerably for optimal use in the STM.

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A High Rigidity and Precision Scanning Tunneling Microscope with Decoupled XY and Z Scans

Scanning ◽

10.1155/2017/1020476 ◽

2017 ◽

Vol 2017 ◽

pp. 1-7

Author(s):

Xu Chen ◽

Tengfei Guo ◽

Yubin Hou ◽

Jing Zhang ◽

Wenjie Meng ◽

...

Keyword(s):

Scanning Tunneling Microscope ◽

Atomic Resolution ◽

Scanning Tunneling ◽

Electronic Noise ◽

High Quality ◽

Tunneling Microscope ◽

The Core ◽

High Rigidity ◽

The Common ◽

The Impact

A new scan-head structure for the scanning tunneling microscope (STM) is proposed, featuring high scan precision and rigidity. The core structure consists of a piezoelectric tube scanner of quadrant type (for XY scans) coaxially housed in a piezoelectric tube with single inner and outer electrodes (for Z scan). They are fixed at one end (called common end). A hollow tantalum shaft is coaxially housed in the XY-scan tube and they are mutually fixed at both ends. When the XY scanner scans, its free end will bring the shaft to scan and the tip which is coaxially inserted in the shaft at the common end will scan a smaller area if the tip protrudes short enough from the common end. The decoupled XY and Z scans are desired for less image distortion and the mechanically reduced scan range has the superiority of reducing the impact of the background electronic noise on the scanner and enhancing the tip positioning precision. High quality atomic resolution images are also shown.

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