Scanning Probe Microscopes John Toby Phys 321 20 April 2010.

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Presentation transcript:

Scanning Probe Microscopes John Toby Phys April 2010

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History 1590: Hans Janssen and Hans Lippershey credited with first microscope. 1676: Leeuwenhoek improves microscope and sees red blood cells and “wee beasties”. 1981: First type of scanning probe microscope used.

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dvice.com/archives/2009/01/nanoscale-imagi.php

Advantages Resolution is not impeded by diffraction but is controlled by probe size. Specimen does not have to be a vacuum. The method can make small structures

Example: c%20Force%20Microscopy,%20Recent%20Updates%20and%20an%20Overview%2 0of%20The%20Technol_files/image022.jpg

Disadvantages Maximum image size is smaller Can’t read liquids. Rate of scanning is slow. Specimen’s height can throw off the detail of scan if tall.

Questions?

Sources “Microscope.” Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. Web. 12 April “Scanning probe microscopy.” Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. Web. 12 April Sources for images are posted along with the image.