| dc.contributor.advisor |
Markert , John T . |
|
| dc.creator |
Lu , Wei , 1975 - |
|
| dc.date.accessioned |
2012 -10 -05T14 :16 :12Z |
|
| dc.date.accessioned |
2012 -11 -29T20 :54 :31Z |
|
| dc.date.available |
2012 -10 -05T14 :16 :12Z |
|
| dc.date.available |
2012 -11 -29T20 :54 :31Z |
|
| dc.date.created |
2008 |
|
| dc.date.issued |
2012 -10 -05 |
|
| dc.identifier.uri |
http : / /hdl .handle .net /2152 /18178 |
|
| dc.description.abstract |
We report the design and fabrication of a micro -mechanical oscillator for use in extremely small force detection experiments such as transverse force measurements of a moving vortex and Nuclear Magnetic Resonance Force Microscopy (NMRFM ) . We study the basic physics of the double torsional mechanical oscillator , and pursue double torsional oscillators with small spring constants , high resonance frequencies , and high quality factors . Using a series of semiconductor manufacturing techniques , especially using the electron -beam lithography technique , we successfully micro -fabricate double torsional mechanical oscillators from silicon -on -insulator wafers . We conduct characterization experiments to extract important parameters of a mechanical oscillator , including the resonance frequencies , spring constants , and quality factors . We focus on the four typical resonance modes of these oscillators , and then compare the force detection sensitivity of each mode . Eventually we apply these force sensitive oscillators to gold micro -mass measurements , and achieve very small mass detection . In the future we are going to continue to micro -fabricate thinner oscillators to reduce the spring constants , and improve the quality factors by designing more suitable geometric shapes and by pursuing annealing studies . Thus , we might be able to achieve single nuclear spin measurements using NMRFM . |
en_US |
| dc.format.medium |
electronic |
|
| dc.language.iso |
eng |
en_US |
| dc.rights |
Copyright © is held by the author . Presentation of this material on the Libraries' web site by University Libraries , The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works . |
|
| dc.subject.lcsh |
Harmonic oscillators - -Design and construction |
|
| dc.subject.lcsh |
Physical measurements |
|
| dc.subject.lcsh |
Nanostructured materials |
|
| dc.subject.lcsh |
Lithography , Electron beam |
|
| dc.title |
Fabrication and characterization of a double torsional mechanical oscillator and its applications in gold micromass measurements |
en_US |
| dc.description.department |
Physics |
en_US |
| dc.type.genre |
Thesis |
|
| dc.type.material |
text |
|
| thesis.degree.name |
Doctor of Philosophy |
en_US |
| thesis.degree.level |
Doctoral |
en_US |
| thesis.degree.discipline |
Physics |
en_US |
| thesis.degree.grantor |
The University of Texas at Austin |
|
| thesis.degree.department |
Physics |
en_US |