Undergraduate Teaching 2017-18

Engineering Tripos Part IIA Project, SG1: Atomic Force Microscope, 2017-18

Engineering Tripos Part IIA Project, SG1: Atomic Force Microscope, 2017-18

Not logged in. More information may be available... Login via Raven / direct.

PDF versionPDF version

Leader

Dr T O'leary

Timing and Structure

Thursdays 11-1pm and Mondays 9-11am plus afternoons

Prerequisites

3F1 and 3F2 useful

Aims

The aims of the course are to:

  • Understand the basic functioning of an Atomic Force Microsope
  • Develop models for a piezo-electric translation stage and design controllers to compensate for its natural resonance, while still providing a sufficiently fast and accurate response.

Content

An Atomic Force Microscope (AFM) is a fairly new instrument in the area of Scanning Probe Microscopy (SPM) that is capable of imaging with extremely high resolution. It can resolve single DNA strands, measure nano-Newtons and determine friction coefficients of microscopic materials. In this project students will work with a custom-made AFM. There is a significant focus in this project on the modelling and control of a piezo-electric translation stage, which is used to take scans.

FORMAT

Students will work in teams of two, with each pair sharing an AFM.

ACTIVITIES

  • Week 1: Familiarisation with the procedures of using the AFM. Compute and then measure the gain of the /optical lever/, which is the enabling technology of an AFM and which determines its resolution. Write first interim report.
  • Week 2: Collect experimental data from the AFM for modelling. Hand measurement of the resonant frequencies. Develop spectral and parametric linear models in Matlab. Write second interim report.
  • Weeks 3 and 4: Develop controllers in Matlab and implement on the AFM. Takes various scans. Investigate three post-processing techniques in Matlab that will improve the image quality. Write final report.

Coursework

Coursework Due date Marks

Interim report 1

Thu 17 May 2018

15

Interim report 2

Thur 24 May 2018

15

Final report

4pm Thu 7 June 2018

50

 

Examination Guidelines

Please refer to Form & conduct of the examinations.

 
Last modified: 24/10/2017 16:00