Honors College Thesis
 

Metal-organic framework thin film synthesis via a microfluidic pen system

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https://ir.library.oregonstate.edu/concern/honors_college_theses/2514nv07f

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  • ZIF-8, a zeolitic imidazolate framework that consists of zinc ions and imidazolate linkers, is of great interest due to its simple synthesis methods, low-cost raw materials, chemical and thermal stability, as well as its stability in moist environments. Furthermore, due to its unique structure, it contains well-defined pores that have the ability to capture and sieve molecules. In the form of thin films, this material has potential uses in chemical gas sensors, which can indicate the presence of volatile organic compounds that can be harmful to human health. Typical thin film synthesis methods include direct solvothermal synthesis, layer-by-layer deposition, dip-coating, spin-coating, and interfacial/contra-diffusion synthesis. However, these methods are generally confined to the size and shape of the substrate, and the growth of the ZIF-8 particle is not fully controlled, making the need for a scalable, cost-effective, and controllable method more apparent. In this work, we conduct a facile, rapid, and cost-effective synthesis of ZIF-8 thin films in an additive manner. Using a syringe pump mixing system that feeds through a microfluidic pen, ZIF-8 growth can be precisely controlled and deposited onto a surface.
  • Keywords: Metal-organic frameworks, microfluidics, thin films
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