University of Cambridge > Talks.cam > Electronic Structure Discussion Group > Bending modes, elastic constants and mechanical stability of graphitic systems

  Browse A-Z

Log in

Cambridge users (raven)details Other usersdetails No account?details

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

Bending modes, elastic constants and mechanical stability of graphitic systems

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Neil Drummond.

The thermodynamic and mechanical properties of graphitic systems are strongly dependent on the shear elastic constant C44 . Our density functional calculations provide the first complete determination of their elastic constants and exfoliation energies. We show that stacking misorientation leads to a severe lowering of C44 from 4.5GPa (perfect stacking) to 0.24±0.06 GPa (random stacking). The lower exfoliation energy and the lower C44 (more bending modes) suggest that flakes with random stacking should be easier to exfoliate than the ones with perfect or rhombohedral stacking in agreement with a recent experiment [Y. Hernandez et al., Nature Nanotech. 3, 563(2008)].

Download slides (PDF)

This talk is part of the Electronic Structure Discussion Group series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

MedSIN talks Sensors & Actuators Seminar Series Cambridge Genomic Services Seminars

Other talks

'Politics in Uncertain Times: What will the world look like in 2050 and how do you know? Replication or exploration? Sequential design for stochastic simulation experiments Evolution’s Bite: Dental evidence for the diets of our distant ancestors NatHistFest: the 99th Conversazione and exhibition on the wonders of the natural world. Atmospheric Retrieval Part IIB Poster Presentations Alzheimer's talks Café Synthetique: Graduate Talks! Formation and disease relevance of axonal endoplasmic reticulum, a "neuron within a neuron”. Crowding and the disruptive effect of clutter throughout the visual system Symplectic topology of K3 surfaces via mirror symmetry Production Processes Group Seminar - "Evanescent Field Optical Tweezing for Synchrotron X-Ray Crystallography"
 

© 2006-2024 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity