Team:Cambridge/Experiments/Reflectin Thin Films II

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Reflectin Thin Films II We refined our methods in a number of ways:

Practice

  • Centrifugation of the solutions prior to spin and flow coating to sediment the impurities that caused thickness variations previously. (13000rpm for 10 minutes)
  • We introduced liquid CO2 pressure wash to improve cleaning of the silicon substrates
  • Trialled spin coating on a glass substrate to allow us to image the way the thin film refracts and transmits light.
  • We heat cured the thin films, 10 minutes at 80 or 120 degrees.
  • We recorded the reflectance spectra of some of the thin films
  • We ran a control using the protein bovine serum albuimin.

Results The centrifugation appears to have reduced the disruption due to impurities in the coated solution

Reflectin Thin Film3.jpg
Reflectin Thin Film 2.jpg

Safety