Explore this gallery regularly to find new results!

1. Video-rate imaging with atomic resolution on two terraces

Demonstration of zooming, panning and rotations, while scanning at video rate on a rough surface. Realise that this is not acquired a constant-hight imaging mode, but with active feedback; the LPM feedback is a large-bandwidth system allowing fast imaging on rough surfaces. The operator was panning, zooming in and out and rotation the image during acquisition by means of the software controls.
Note the attachment and detachment of atoms at the kink site!

 

Controller:

LPM Video-rate Control Electronics

Microscope:

LPM VT-STM (UHV) with conical scanner

Sample:

Au (110) reconstruction

Imaging
properties:

Up to 24 images/sec 64 x 64 pixels 4 images/frame acquired: Z, dZ both L2R and R2L)

Image scale:

~30 nm (changing during movie)

Image processing:

None, raw data is presented

Courtesy:

Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

2. VT-STM: Life imaging of polycrystalline growth

This movie demonstrates that LPM's VT-STM allows imaging during deposition of material. In this sequence, one can `live' observe the growth of a poly-crystalline gold film.

 

Controller:

LPM Video-rate Control Electronics

Microscope:

LPM VT-STM (UHV) with conical scanner

Sample:

Poly-crystalline film Au

Imaging
properties:

3.4 minutes/frame

Image scale:

480 x 480 nm

Image processing:

Differentiated, centered (to correct for small drift)

Courtesy:

Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

3. LPM Controller with a third-party SPM: demonstration of improved performance

Demonstration of the imaging quality when the LPM controller is used in combination with a third-party microscope. In this case, the LPM Controller is connected to a Multi-Mode microscope. Note the high imaging rate that could be obtained. We also demonstrate the online rotation an zooming features that are included in the software. Some images do show 'deformations' due to the fact that the zooming and rotation commands are carried out real-time.

The stretching at the left and right border of the image is due to the rounding of the fast-scan direction signal. This rounding prevents excitation of resonances of the scanner when the scanner is reversing the scan direction.

 

Controller:

LPM Video-rate Control Electronics

Microscope:

Veeco Multi-Mode (STM-mode) A-scanner

Sample:

HOPG, air

Imaging
properties:

Real time movie: 1 frame/second
256 x 256 pixels
Line-rate: 256Hz

Rounding fast scan signal: on

Image scale:

atomic resolution

Image processing:

plane background subtraction

Courtesy:

Drs. V. Fokkema & Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

4. LPM Controller with a third-party SPM: demonstration of improved performance

Demonstration of the imaging quality when the LPM controller is used in combination with a third-party microscope. In this case, the LPM Controller is connected to a Multi-Mode microscope. Note that this image was recorded in only 7.5 seconds, still having high resolution (512 x 512).

The stretching at the left and right border of the image is due to the rounding of the fast-scan direction signal. This rounding prevents excitation of resonances of the scanner when the scanner is reversing the scan direction.

 

Controller:

LPM Video-rate Control Electronics

Microscope:

Veeco Multi-Mode (STM-mode) A-scanner

Sample:

HOPG, air

Imaging
properties:

image recorded in 7.5 sec (0.13 frames/second)
512 x 512 pixels
Line-rate: 68Hz

Rounding fast scan signal: on

Image scale:

atomic resolution

Image processing:

plane background subtraction

Courtesy:

Drs. V. Fokkema & Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

5. LPM Controller with VT-STM: high quality imaging on metal surface

Demonstration of the imaging quality

 

Controller:

LPM Video-rate Control Electronics

Microscope:

LPM's UHV VT-STM

Sample:

Au(100) reconstruction, after sub-monolayer Au deposition

Imaging
properties:

 

Image scale:

atomic resolution

Image processing:

plane background subtraction

Courtesy:

Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

6. LPM Controller with VT-STM: high quality imaging on metal surface

Demonstration of the imaging quality

 

Controller:

LPM Video-rate Control Electronics

Microscope:

LPM's UHV VT-STM

Sample:

Au(100) reconstruction, after sub-monolayer Au deposition

Imaging
properties:

 

Image scale:

atomic resolution

Image processing:

plane background subtraction

Courtesy:

Dr. M.J. Rost, Kamerlingh Onnes Laboratory, Leiden University

7. Reactor STM: prototype results (expected end 2008)

Imaging of the Pt(110) surface while changing the partial pressures in the reactor. The graph indicates the partial pressures of the gasses during the capture of the movie. Note the correlation between surface roughening and the upturn in CO2 partial pressure (see imaging properties for color coding).

 

Controller:

 

Microscope:

LPM's Reactor STM (prototype version)

Sample:

Pt(110)

Imaging
properties:

Gases:
CO (blue)
O2(green)
CO2 (red)

Image scale:

 

Image processing:

 

Courtesy:

Dr. B.L.M. Hendriksen & Prof. J.W.M Frenken, Kamerlingh Onnes Laboratory, Leiden University

8. Camera software package: acquisition, analysis and presentation of movies

This movie gives an example of the movie-processing and presentation features that are incorporated in our software. The software supports a scripting option (Python), such that batch processing and advanced becomes easy and flexible.

 

Controller:

LPM Video-rate Control Electronics

Microscope:

Beetle-type

Sample:

 

Imaging
properties:

 

Image scale:

 

Image processing:

 

     


 

 

 

 

 




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