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What We Do In My Lab
 

What We Do In My Lab

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My 9th Grade Brother asked me what I do in my lab, so I threw together this presentation. I am not sure how much a 9th Grader knows, but I intended this presentation to give him exposure, rather than ...

My 9th Grade Brother asked me what I do in my lab, so I threw together this presentation. I am not sure how much a 9th Grader knows, but I intended this presentation to give him exposure, rather than to have him understand everything. Please feel free to critique my presentation, and certainly point out any pictures that I may have failed to give the original sources credit for.

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    What We Do In My Lab What We Do In My Lab Presentation Transcript

    • What we do in my lab Optical Materials Source: www.nanotech-now.com/current-uses.htm Source: stm.lbl.gov/Salmeron_group/homeold.html Source: www.godunov.com/bucky/fullerene.html Source: www.aip.org/png/2003/186.htm Source: web.gc.cuny.edu /dept/engineering/ Faissal Source: scienceblogs.com /.../04/pining_for_the_sun.php
    • We want to make
      • Optical Protection
        • For protection from lasers
      • Solar Cells
        • For making electricity
      Source: www.howstuffworks.com/solar-cell.htm
    • What we do:
      • We make nano sized crystals, called quantum dots
      • We connect them with carbon nanotubes , which act as wires
      • We make plastic films which hold our quantum dots and carbon nanotubes
      • We test our films as optical protection , and as solar cells
    • We start with crystals Source: www.faeriesfinest.com/B947.html Source: commons.wikimedia.org/wiki/File:Rock_salt_crystal.jpg Crystals can look like this: The crystals that we make are nanometers in size! We call these nanocrystals Quantum Dots .
    • How small is a nanometer?
      • How small is small?
      Source: http://cobweb.ecn.purdue.edu/~janes/whats_nano.htm
    • We take Atoms from Salts to make our Quantum Dots Cadmium From Salt Selenium From Salt Cadmium Selenide ( CdSe ) Source: http://www.astro.virginia.edu/class/oconnell/astr121/cosmic-history-narrative.html +
    • Our Quantum Dots look like this: In the Laboratory: We cannot see our Quantum Dots . Here are the models of our nanocrystals Source: Published online: 25 January 2004; doi:10.1038/nmat1056
    • Our crystals are so small, they need protection, so they do not get destroyed
      • They are protected by chemicals that are like soap, which cover the crystals
      Source: Pileni, Marie-Paule, Nature Materials 2, 145–150 (2003)
    • Quantum Dots are Interesting:
      • Smaller dots look BLUE, and larger dots look RED , under ultra violet light:
      Source: www.nanotech-now.com/current-uses.htm
    • We also work with Carbon Nanotubes Source: Mat. Res. [online]. 2008, vol.11, n.3 [cited 2009-07-15], pp. 325-333 Carbon Nanotubes in the Lab Carbon Nanotube Model
    • Buckyballs!
      • The idea for carbon nanotubes came from balls made of carbon atoms: these balls were called Buckyballs!
      Source: www.godunov.com/bucky/fullerene.html
    • Carbon nanotubes look like this: Source: www.aip.org/png/2003/186.htm
    • We make nanocomposites Source: www.nanotech-now.com/current-uses.htm
    • We make thin films of plastic, with quantum dots and carbon nanotubes in them
      • This is our machine for making thin films:
        • It spins coatings of films, one layer at a time
    • We test our films using a LASER Source: www.laseroffers.com/what-is-laser/ Source: http://www.rp-photonics.com/lasers.html
    • We move our films through a focused laser to see how their properties change Source: www.microscopy-uk.org.uk/primer/geomop.htm
    • We measure changes in: Source: http://www.sciencebuddies.org/science-fair-projects/project_ideas/Phys_p028.shtml Refractive Index: Source: http://www.tcd.ie/Physics/opticslab/facilities/z_scan.php Absorption coefficient (using two photon absorption): Source: http://www.hyperzoid.com/csc492/microscopy.html
    • A little bit about light
      • The Electromagnetic Spectrum:
      Source: http://www.onpointlasers.com/laser-basics
    • Getting Light from an Atom Source: https://reich-chemistry.wikispaces.com/422-002+D.+Thibault+and+J.+Brock+Big+Time+Line+Project
    • Hydrogen Spectra Source: http://www.goiit.com/posts/list/community-shelf-the-bohr-atom-917720.htm
    • A little bit about LASERS Source: http://www.phy.cuhk.edu.hk/phyworld/articles/laser/laser_e.html Electron transitions in an atom: Schematic Diagram of a Ruby Laser: Comparing laser and ordinary lamplight:
    • To recap, this is what we do:
      • We make nano sized crystals, called quantum dots
      • We connect them with carbon nanotubes , which act as wires
      • We make plastic films which hold our quantum dots and carbon nanotubes
      • We test our films as optical protection , and as solar cells
      • You can see other pictures from my lab here: http://www.flickr.com/photos/faissal_bd/sets/72157621760317409/