Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


ohiou1268336942.pdf (1.58 MB)

ETD Abstract Container

Abstract Header

Calibration of Glass Fiber Microcantilevers

Liu, Yang
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268336942

Abstract Details

2010, Master of Science (MS), Ohio University, Physics and Astronomy (Arts and Sciences).
A thermal fluctuation method for microcantilever spring constant measurement was evaluated. Using this technique, the spring constant was measured by recording microcantilever movement under microscope, then analyzing a set of images, frame by frame to obtain the variance of the fiber's fluctuating position which can be related to the spring constant using the Equipartition Principle. Images were captured from VCR recordings as well as directly from the camera. Captured images were processed and fiber centroids were found using LabVIEW programs. The centroid data was processed using a moving average filter and variance was calculated for final determination of spring constant. Under some circumstances and when the fiber does not stick to the chamber wall, the thermal fluctuation method gives a spring constant that varies with cantilever length and is of the correct order of magnitude. Spring constant estimates using 40x magnification were always bigger than 20x for calculated spring constant values. Liquids have a much larger damping effect on vibrations compared to air for the spring constant measurement and are thus less affected by outside disturbance. Recording to VCR does not introduce significantly more noise from direct capture from the camera.
David Tees, PHD (Advisor)
85 p.
Biophysics
microcantilever; spring constant; fiber centroid

Recommended Citations

Citations

  • Liu, Y. (2010). Calibration of Glass Fiber Microcantilevers [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268336942

    APA Style (7th edition)

  • Liu, Yang. Calibration of Glass Fiber Microcantilevers. 2010. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268336942.

    MLA Style (8th edition)

  • Liu, Yang. "Calibration of Glass Fiber Microcantilevers." Master's thesis, Ohio University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1268336942

    Chicago Manual of Style (17th edition)

ohiou1268336942
496
© 2009, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.