the applications of nano materials n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
The Applications of Nano Materials PowerPoint Presentation
Download Presentation
The Applications of Nano Materials

Loading in 2 Seconds...

play fullscreen
1 / 9

The Applications of Nano Materials - PowerPoint PPT Presentation


  • 140 Views
  • Uploaded on

The Applications of Nano Materials. Department of Chemical and Materials Engineering San Jose State University. Zhen Guo, Ph. D. Technology and Characterization of Nano Material Science Session VI: Nano Material Synthesis (Bottom Up) Session VII: Nano Technology (Top Down)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The Applications of Nano Materials' - Samuel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
the applications of nano materials

The Applications of Nano Materials

Department of Chemical and Materials Engineering

San Jose State University

Zhen Guo, Ph. D.

slide2

Technology and Characterization

  • of Nano Material Science
      • Session VI: Nano Material Synthesis (Bottom Up)
      • Session VII: Nano Technology (Top Down)
      • Session VIII: Nano Material Characterization

03/08/06

diffraction and bragg s law
Diffraction and Bragg’s Law

Constructive Interference Condition:

Phase Difference between beam 1 and 2 = 2dSinq = nl

why electron microscopy
Why Electron Microscopy
  • Wave length of Visible light, X-ray and Electron Beam (200KV)
  • Requirement of Nano Material Characterization

http://ncem.lbl.gov

reciprocal lattice k space
Reciprocal Lattice (K-Space)

Fourier Transformation

Real Lattice:

Reciprocal Lattice:

reciprocal verse real lattice

a3

C

n

1/l

O

1/k

a2

B

1/h

A

a1

Reciprocal verse Real Lattice

2dSinq = nl

2Sinq/l = n/d = k

what is unique about nano materials
What is unique about nano materials
  • Instead of single point in an infinite bulk material case, The lattice point in reciprocal lattice will change to other shape with finite volume for nano materials.
  • Since it is Reciprocal space, everything is 1/length scale, the lattice point will change according to object physical size / shape
  • Reciprocal lattice of 2-D thin film will be rod-like perpendicular to the thin film.
  • Reciprocal lattice of 1-D fibers will be plate-like perpendicular to the fiber.
  • Reciprocal lattice of Nano particles will be a sphere-like
x ray peak widening verse nano materials grain size

Intensity

X-ray peak widening verse nano materials grain size
  • Infinite large single crystals will bring single line of diffraction pattern.
  • In reality, every peak has its width due to multiple grain size
  • Half width of peak provide information about grain size
  • Nano materials will have very wide X-ray peak and from there we can back calculate grain size

2q