Krysta Boccuzzi
Upcoming SlideShare
Loading in...5
×
 

Like this? Share it with your network

Share

Effect of Carbon Nanotubes on Chirality in Liquid Crystals

Effect of Carbon Nanotubes on Chirality in Liquid Crystals

Statistics

Views

Total Views
673
Views on SlideShare
655
Embed Views
18

Actions

Likes
0
Downloads
3
Comments
0

1 Embed 18

http://www.phys.cwru.edu 18

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Krysta Boccuzzi Presentation Transcript

  • 1. KRYSTA BOCCUZZI, RAJ BASU, CHARLES ROSENBLATT Effect of Carbon Nanotubes on Chirality in Liquid Crystals
  • 2. Outline
    • Introduction to Liquid Crystals and Carbon Nanotubes
    • Method
    • 8S5 and Carbon Nanotubes
    • Could this be the result of an artifact?
    • Conclusions
  • 3. Introduction to Liquid Crystals Nematic Smectic A Smectic C A liquid crystal is chiral when the mirror image of the molecule cannot be superimposed on the molecule. Liquid crystals have properties between those of liquids and solids.
  • 4. Introduction to Carbon Nanotubes
    • The liquid crystal anchors at the surface of the carbon nanotubes.
    • The axis of the nanotube aligns along the director.
  • 5. The Electroclinic Effect 𝜽 The electroclinic effect only occurs when the liquid crystal is chiral.
  • 6. Cell Preparation
    • Indium Tin Oxide (ITO) coated glass was spin coated with RN1175.
    • The liquid crystal and nanotube mixture was made by dispersing the nanotubes in acetone, shaking them in a vortex mixer for 15 minutes, and sonicating them for 2 hours.
    • The cell was filled in the nematic phase and cooled to the Smectic A phase.
    ITO coating alignment polymer glass rubbing direction rubbing direction
  • 7. Experimental set-up Laser Polarizer (22.5° from director) Analyzer Lens Sample Detector Digital Multimeter Lock-in Amplifier Function generator Computer
  • 8. 8S5 and Carbon Nanotubes
  • 9. Could this be the result of an artifact?
    • Chemical analysis by the manufacturer showed no chiral impurities.
    • Washed in acetone.
    • Washed in toluene.
  • 10. Conclusions
    • The carbon nanotubes transfer chirality to the liquid crystal.
    • Future work will focus on finding the cause of this chirality.