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Revision as of 00:22, 29 October 2011 by Zibo Chen (talk | contribs) (Verification of Random Walking Mechanism on Origami)
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Friday, January 19, 2018









While the overall project is the sorting of cargos on origami, we expected verification of all of the mechanisms would take longer than one summer. Therefore, this summer was spent verifying two aspects of the project:

  1. Verifying that the proposed mechanisms work when the strands are free-floating in solution (i.e. not bound to origami).
  2. Verifying that the random walking mechanism works as intended on origami.

Verification of Overall Mechanisms in Solution

Gel Verification

Main article: Gel Verification

All of the essential mechanisms in our system were verified in solution using polyacrylamide gel electrophoresis. These mechanisms include: walker-track binding, triggering the walker, walking from one track to another, picking up cargo, walking while carrying cargo, triggering the cargo goal, dropping off cargo, and irreversibly walking from tracks to the walker goal. We are fairly confident that all of these mechanisms work as expected in solution, with a few mysteries that do not seem to interfere with the overall behavior of the system (see Gel Verification).

SPEX Verification

Verification of Random Walking Mechanism on Origami

SPEX Verification

Main article: SPEX Results

We used fluorescent spectroscopy (SPEX) to verify the random walking mechanism on the origami. Goals were tagged with fluorophores whereas walkers were tagged with the corresponding quenchers. Fluorescent signals will decrease when walkers reach their goals. Unlike AFM, which studied individual origami, SPEX experiments studied the collective behavior of all the origami in solution. Hence, the SPEX results were analyzed using both Matlab simulation and mathematical formulae.

AFM Verification