TY - GEN
T1 - Direct tensile tests of individual WS2 nanotubes
AU - Kaplan-Ashiri, Ifat
AU - Cohen, SR
AU - Gartsman, Konstantin
AU - Rosentsveig, Rita
AU - Ivanovskaya, V
AU - Heine, T
AU - Seifert, G
AU - Wagner, Daniel Hanoch
AU - Tenne, Reshef
PY - 2005
Y1 - 2005
N2 - The Young's modulus of WS2 nanotubes is an important property for various applications. Measurements of the mechanical properties of individual nanotubes are challenging because of the small size of the tubes. Lately, measurements of the Young's modulus by buckling of an individual nanotube using an atomic force microscope(1) resulted in an average value of 171GPa. Tensile tests of individual WS2 nanotubes were performed experimentally using a scanning electron microscope and simulated tensile tests of MoS2 nanotubes were performed by means of a density-functional tight-binding (DFTB) based molecular dynamics (MD) scheme. Preliminary results for WS2 nanotubes show Young's modulus value of ca. 162GPa, tensile strength value of ca. 13GPa and average elongation of ca. 12%. MD simulations resulted in elongation of 19% for zigzag and 17% for armchair MoS2 single wall nanotubes. Since MoS2 and WS2 nanotubes have similar structures the same behavior is expected for both, hence there is a good agreement regarding the elongation of WS2 nanotubes between experiment and simulation.
AB - The Young's modulus of WS2 nanotubes is an important property for various applications. Measurements of the mechanical properties of individual nanotubes are challenging because of the small size of the tubes. Lately, measurements of the Young's modulus by buckling of an individual nanotube using an atomic force microscope(1) resulted in an average value of 171GPa. Tensile tests of individual WS2 nanotubes were performed experimentally using a scanning electron microscope and simulated tensile tests of MoS2 nanotubes were performed by means of a density-functional tight-binding (DFTB) based molecular dynamics (MD) scheme. Preliminary results for WS2 nanotubes show Young's modulus value of ca. 162GPa, tensile strength value of ca. 13GPa and average elongation of ca. 12%. MD simulations resulted in elongation of 19% for zigzag and 17% for armchair MoS2 single wall nanotubes. Since MoS2 and WS2 nanotubes have similar structures the same behavior is expected for both, hence there is a good agreement regarding the elongation of WS2 nanotubes between experiment and simulation.
M3 - Conference contribution
VL - 475-479
T3 - Pricm 5: The Fifth Pacific Rim International Conference On Advanced Materials And Processing, Pts 1-5
SP - 4097
EP - 4102
BT - PRICM-5
PB - Trans Tech Publications
T2 - 5th Pacific Rim International Conference on Advanced Materials and Processing
Y2 - 2 November 2004 through 5 November 2004
ER -