User:Matt Hartings/Notebook/3D Printing/2016/07/29

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ZIF-8 on Silicon 100

The NIST crew have asked me to try and grow some MOF or ZIF on a Si chip. Nikolai Klimov made some chips that have been coated in PMMA except for a small window that has exposed Si.

It seems like the best way to do this will be to put down a monolayer of silane down on the Si first. However, I'm going to try some brute force methods first.

  1. Depositing pre-synthesized and purified ZIF-8 onto the chip
    1. suspend ~ 1mg of ZIF-8 (prepared by Michael Bible) in 500μL of HPLC pure water
    2. deposit 100μL of this suspension onto the chip and allow to evaporate
  2. Synthesize ZIF-8 on chip (using protocol from doi: 10.1039/c0cc05002d)
    1. Stock solutions
      1. 1.1558g of Zn(NO3)2·6H2O in 7.938g of water (HPLC pure)
      2. 2.293g of 2-methylimidazole in 7.998g of H2O (HPLC pure)
    2. Synthesis
      1. Add 9.1 μL of Zn solution to the middle of the chip
      2. Add 91 μL of the 2-methylimidazole solution to the chip (on top of Zn solution)
      3. Allow to evaporate

Observations

  1. Depositing pre-synthesized and purified ZIF-8 onto the chip
    1. The powder wasn't fully suspended and was a VERY pale milky hue.
    2. I'm keeping this trial dilute just to see if this stuff lays down on the surface or not.
  2. Synthesize ZIF-8 on chip (using protocol from doi: 10.1039/c0cc05002d)
    1. As soon as the solutions were mixed, a white ppt appeared.
    2. This trial looks like I might have had too high of a concentration. I may decrease it for the next run, but I want to see what the surface looks like first.

20160729 ZIF8onChip.jpg