Harnessing Thermal Expansion Mismatch to Form Hollow Nanoparticles Academic Article uri icon

abstract

  • A basic determinant of the mechanical properties of a material is how it will respond to stress. Whether it is elastic deformation or failure, these responses are dictated both on the atomic level, through bond strengths and crystal structure, and on a microscopic level by the long-range order of crystal grains within the material. Thus, nanomaterials whose crystal grains are on the order of 100 nm or less provide an interesting system in which to study the mechanical properties of a given material. In particular, a number of nanomaterials systems are capable of generating internal stresses through thermal expansion or atomic incorporations. For example, the lithiation of Si or ZnO nanomaterials can lead to cracking within the material due to stress arising from volume expansion [1, 2] and the heating of Al/Al 2O 3 nanoparticles can lead to failure of the protective oxide coating.[3, 4] Although in …

publication date

  • November 2, 2012

published in