Nanoscale silica behaves as ductile as gold
21 March 2008Silica is brittle at bulk, however researchers have discovered that at nanoscale silica behaves quite differently. Researchers at NIST (National Institute of Standards and Technology) at the University of Maryland-College Park have found that nanoscale silica exhibit ductile behavior.
Pradeep Namboodri and his team found that silica behaves differently in macro and micro state. In brittle substances, a material’s break point depends on its ability to sustain the stress or load applied on it, however in ductile substances the atom shuffle around and may remain intact for much more time and the material’s break down depends upon the structural flaws in it.
Researchers found that in nanoscale, the structural flaws don’t exist and therefore the materials are almost perfect. As the atoms in nanoscale generally reside on the surface and these atoms are not bounded and therefore the properties of these atoms dominate. Scientists at NIST using an atomic force microscope (AFM) found that the silica will exhibit properties similar to gold or silver in nanoscale.
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