Elastic Properties of 4-6 nm-thick Glassy Carbon Thin Films

M. P. Manoharan, H. Lee, R. Rajagopalan, H. C. Foley, M. A. Haque

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Glassy carbon is a disordered, nanoporous form of carbon with superior thermal and chemical stability in extreme environments. Freestanding glassy carbon specimens with 4-6 nm thickness and 0. 5 nm average pore size were synthesized and fabricated from polyfurfuryl alcohol precursors. Elastic properties of the specimens were measured in situ inside a scanning electron microscope using a custom-built micro-electro-mechanical system. The Young's modulus, fracture stress and strain values were measured to be about 62 GPa, 870 MPa and 1. 3%, respectively; showing strong size effects compared to a modulus value of 30 GPa at the bulk scale. This size effect is explained on the basis of the increased significance of surface elastic properties at the nanometer length-scale.

Original languageEnglish (US)
Pages (from-to)14-19
Number of pages6
JournalNanoscale Research Letters
Volume5
Issue number1
DOIs
StatePublished - Jan 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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