graphene better then diamond n.
Download
Skip this Video
Download Presentation
Graphene better then Diamond

Loading in 2 Seconds...

play fullscreen
1 / 9

Graphene better then Diamond - PowerPoint PPT Presentation


  • 206 Views
  • Uploaded on

Graphene better then Diamond. Graphene and diamond is made of pure carbon. Properties of the nanodiamond. Nanodiamond: synthesized by the detonation; narrow size distribution; diamond-like; Widely used in the industry

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 'Graphene better then Diamond' - thyra


Download Now 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
graphene better then diamond

Graphene better then Diamond

Graphene and diamond is made of pure carbon

properties of the nanodiamond
Properties of the nanodiamond

Nanodiamond:

  • synthesized by the detonation;
  • narrow size distribution;
  • diamond-like;
  • Widely used in the industry

Nanodiamond: Structure: sp3 carbon bond has π electron networks;

unconventional magnetism around thegraphene/diamond interface;

Nanographine: Non bonding π electron state ==> rise of unconventional nanomagnetism;

diamond to graphite
Diamond-to-graphite

Diamond-to-graphite conversion in nanodiamond and electronic properties of nanodiamond-derived carbon system.

Heat-treatment-induced (HTT-Heat treatment temperature) conversion of nanodiamond to nanographite is investigated.

  • Graphitization starts at 900C;
  • proceeds inward in the particle;
  • completed around 1600C, were a nanodiamond particle converted to a single nanographene sheet;

Analysing:

  • Structure; electronic aspects; X-Ray diffraction; high resolution transmission electron micro-scope (HRTEM), scanning electron microscope (SEM),Raman scattering, scanning tunneling microscope (STM), atomic force microscope (AFM), magnetic susceptibility and ESR. E
structural parameters
Structural parameters
  • Shape of nanographine particle;
  • Particle forms Polyhedron of size ca 7nm and a hollow inside;
  • Regularity of graphitic structure;
  • Turbostatic nature of the graphene sheets;
electronic properties
Electronic properties

The electronic properties described analysing magnetic properties.

  • Extended π – electron system;
  • π – electron spins coupled;
  • Accelerated spin-lattice relaxation process;
electronic properties cont
Electronic properties cont.
  • Minimal defects;
  • Disordness of graphite;
  • Stiffennes of the graphitic lattice;
  • Partly vacant π-band bonding - holes;
  • Reduction of the orbital susceptibility
formation of isolated single nanographene layer
Formation of isolated single nanographene layer
  • Electrophoretic deposition
  • Successive heat treatment of isolated nanodiamond particles is expected to produce isolated nanographite particles on a substrate.
  • obtained particle can be assigned to a single nanographene sheet laying flat on the HOPG (highly oriented pyrolytic graphite) substrate.
  • Nanodiamond particles when simply heated at 1600C yields the polyhedral nanographite particles
  • First observation of a single nanographene sheet.
graphene future in today s industry
Graphene future in today's industry

Paper-like graphene:

  • Flexible;
  • tougher than diamond;
  • lighter then most metals;
  • different electrical properties.

Graphene can be used:

  • touch screens;
  • solar cells;
  • energy-storage devices;
  • cell phones;
  • high-sped computer chips.

Graphene may be the ticket to major technological breakthrough;

“It is the thinnest known material in the universe, and the strongest ever measured,” wrote University of Manchester physicist Andre Geim in Science.