VideoAFM—a new tool for high speed surface analysis
Hobbs, Jamie K.; Vasilev, Cvetelin; Humphris, Andrew D. L.; Hobbs Jamie K.; Department of Chemistry, University of Sheffield; Vasilev Cvetelin; Department of Chemistry, University of Sheffield; Humphris Andrew D. L.; Infinitesima Ltd., Oxford Centre for Innovation
Журнал:
Analyst
Дата:
2006
Аннотация:
The VideoAFM provides a 1000 fold increase in image rate compared to conventional atomic force microscopes, giving nanometre resolution images of surfaces at a rate of 15 frames s<sup>â 1</sup>, which is approximately 1 million pixels s<sup>â 1</sup>. Images of high stiffness surfaces such as calibration grids are provided for the first time, and allow for a more rigorous examination of the meaning of the data obtained with the VideoAFM. Instrumental changes that could provide true topographic images are discussed. The advantages of a high speed scanning technique that is integrated within a conventional AFM are outlined. Particular emphasis is given to the capability to â tileâ images, and hence rapidly map large areas with nanometre resolution. It is found that the inherent increase in stability that comes from a high frame rate leads to the possibility of manually manipulating the sample while maintaining a sharp image, allowing real-time user interaction with the AFM. The possible application of the VideoAFM approach for the very rapid analysis of surface properties and, ultimately, surface chemistry is discussed and some possible routes are given.
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