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Size Effects on the Stiffness of Silica Nanowires

2005; Wiley; Volume: 2; Issue: 2 Linguagem: Inglês

10.1002/smll.200500311

1613-6829

Emilio Cesar Cavalcante Melo da Silva, Limin Tong, Sidney Yip, Krystyn J. Van Vliet,

Mechanical and Optical Resonators

Small but stiff: Results in the literature display an unexplained elastic weakening of silica nanowires with diameters between 43 and 98 nm. However, our new direct mechanical tests using a scanning probe microscope (see schematic) show that silica wires with diameters as small as 280 nm still exhibit the stiffness of bulk silica, while classical molecular dynamics simulations for diameters up to 6 nm predict a small increase in stiffness.