A crucial part of the Scanning Near-Field Microscope (SNOM) is the distance regulation that keeps the separation of a fiber probe tip and the sample surface constant. Previously, shear-force detection was implemented. Shear-force interactions have the disadvantage of being destructive on soft sample. The implementation of an alternative tapping-mode is investigated in this thesis. In tapping-mode, the fiber tip oscillates perpendicularly to the sample surface, thus avoiding the destructive lateral shear-force. / This thesis also provides a general overview of SNOM, including the theory of near-field, the definition of spatial resolution, as well as the tip-sample distance regulation. Tapping-mode feedback is implemented and discussed in comparison to traditional shear-force feedback. Both CD stamper and Polystyrene images were obtained by using tapping-mode SNOM, and compared to images taken under shear-force mode SNOM and Scanning Electron Microscope. Different factors, which affect the performance of tapping-mode SNOM are discussed.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.33777 |
| Date | January 2001 |
| Creators | Huang, Yi-ting, 1976- |
| Contributors | Gruetter, Peter (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001871506, proquestno: MQ78894, Theses scanned by UMI/ProQuest. |
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