ardavan's blog
https://imechanica.org/blog/26276
enEffect of defects on the intrinsic strength and stiffness of graphene
https://imechanica.org/node/15979
<div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/93">molecular dynamics</a></div><div class="field-item odd"><a href="/taxonomy/term/584">mechanics</a></div><div class="field-item even"><a href="/taxonomy/term/623">AFM</a></div><div class="field-item odd"><a href="/taxonomy/term/671">graphene</a></div><div class="field-item even"><a href="/taxonomy/term/3280">defects</a></div><div class="field-item odd"><a href="/taxonomy/term/4308">LAMMPS</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>
<a href="http://www.nature.com/ncomms/2014/140124/ncomms4186/full/ncomms4186.html" target="_blank"><span>It is important from a fundamental standpoint and for practical applications to understand how the mechanical properties of graphene are influenced by defects. Here we report that the two-dimensional elastic modulus of graphene is maintained even at a high density of </span><em>sp</em>3<span>-type defects. Moreover, the breaking strength of defective graphene is only ~14% smaller than its pristine counterpart in the </span><em>sp</em>3<em>-</em><span>defect regime. By contrast, we report a significant drop in the mechanical properties of graphene in the vacancy-defect regime. We also provide a mapping between the Raman spectra of defective graphene and its mechanical properties. This provides a simple, yet non-destructive methodology to identify graphene samples that are still mechanically functional. By establishing a relationship between the type and density of defects and the mechanical properties of graphene, this work provides important basic information for the rational design of composites and other systems utilizing the high modulus and strength of graphene.</span></a>
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</div></div></div>Sun, 26 Jan 2014 08:48:52 +0000ardavan15979 at https://imechanica.orghttps://imechanica.org/node/15979#commentshttps://imechanica.org/crss/node/15979Error | iMechanica