User:James C. Schwabacher/Notebook/Protein-Templated Quantum Dots/2015/02/11

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Objective

  • Testing Sol-gel formation of JCS 15 and JCS 16
  • Filtering and prepping samples (JCS 15, 16) for characterization

Protocol

  • A few mL of millipore water were added to the dried round bottoms
  • The round bottoms were swirled gently as more water was added until structures formed.
  • Mass of dry JCS 16 round bottom= 67.873g, Mass of dry film is thus .0999g

Observations

  1. JCS 15, the sample that lacked BSA, formed black precipitate, as expected. There was a minimal amount-- not enough for characterization with pXRD.
  2. JCS 16, the sample that was not mixed over-night (for a synthesis time of approximately 15 minutes), produced the film-like structures that were discovered serendipitously last semester.
    1. The resulting structures were separated using filtration with a membrane: Supor-450 47mm 0.45μm
    2. a 10 mg sample was prepared for DSC analysis (mass of lid+pan: 49 mg, mass of lip+pan+sample: 59 mg)
    3. The mass of the filter (before filtration) was 0.0671g
    4. The mass of the filter and sample (after filtration) was 1.411g
    5. The sample yield was approximately 1.3439g
    6. Estimated mass of water withheld in structures 1.3439-.0999g= 1.244g

Next Steps

  1. Conduct a series of 15-min syntheses reducing concentrations of mercury and sulfide by a factor of 10.
  2. Perform DSC and pXRD on Samples
    1. Attempt to get BSA-only and BSA-Hg only samples control studies.