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Hoffman Estates High School ESRP 2019

Examining the Crystallization of Gold Nanoparticles Based on Variable Surface Pressure

Authors:

  • Students:
    • Ariana Correia
    • Samuel Darr
    • Amber Dellacqua
    • Darshan Desai
    • Parita Shah
    • Shraddha Zina
  • Teachers:
    • Wayne Oras
  • Mentors:
    • Mrinal Bera (University of Chicago, NSF’s ChemMatCARS)
    • Wei Bu (University of Chicago, NSF’s ChemMatCARS)
    • Binhua Lin (University of Chicago, NSF’s ChemMatCARS)
    • Morgan Reik (University of Chicago, NSF’s ChemMatCARS)
    • Jake Walsh (University of Chicago, NSF’s ChemMatCARS)

Advanced Photon Source Sector 15: ChemMatCARS

Nanoparticle films have a wide range of applications that include sensors, transistors, photovoltaic cells, and filtration devices; however, their self-assembly is still being explored. Nanoparticle films have unique properties that include superparamagnetism, surface plasmon resonance, and quantum confinement. Analyzing the properties of self-assembled nanoparticle films and tunable nanoscale crystal structures will open mankind to a series of inventions and innovations in the fields of materials science and nanoelectronics. In previous experiments with Lad (II) Sulfide nanoparticles, our team had observed that the type of ligands as well as their surface density can alter interparticle spacing. The aim of these experiments was to analyze the three-dimensional structure of the crystallized nanoparticles. This year, however, the ligand type and surface density will remain constant during crystallization by varying the surface pressure and presence of additional ligands. The change in pressure will cause an increase to form multilayers and thus the crystal structure. Hence, the specific goal of this research is to ascertain the direct structure of Gold nanoparticles in two-dimensions.

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