BOUNDARY CONDITION AND SURFACE STRESS EFFECTS ON THE RESONANT PROPERTIES OF METAL NANOWIRES

摘要：

We utilize the recently developed surface Cauchy-Born model,which extends the standard Cauchy-Born theory to account for surface stresses due to undercoordinated surface atoms,to study the coupled influence of boundary conditions and surface stresses on the resonant properties of <100> gold nanowires with 100 surfaces.We quantify,for the first time,variations in the nanowire resonant frequencies due to surface stresses within a finite deformation framework depending on whether fixed/free (cantilevered) or fixed/fixed boundary conditions are utilized,and in quantifying the variation as compared to the corresponding bulk material which does not observe surface effects.We additionally quantify,for the first time,how the residual surface stress impacts the resonant frequencies of metal nanowires within the framework of nonlinear,finite deformation kinematics.

关键词： surface stress boundary conditions resonant frequency nanowire

作者: H.S.Park P.A.Klein

作者单位: Department of Mechanical Engineering,University of Colorado,Boulder,CO80302. Franklin Templeton Investments,San Mateo,CA 94403

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 89-96

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）