title: Application of the thermal flash technique for low thermal diffusivity micro/nanofibers.
abstract: The thermal flash method was developed to characterize the thermal diffusivity of micro/nanofibers without concern for thermal contact resistance, which is commonly a barrier to accurate thermal measurement of these materials. Within a scanning electron microscope, a micromanipulator supplies instantaneous heating to the micro/nanofiber, and the resulting transient thermal response is detected at a microfabricated silicon sensor. These data are used to determine thermal diffusivity. Glass fibers of diameter 15 microm had a measured diffusivity of 1.21x10(-7) m(2)/s; polyimide fibers of diameters 570 and 271 nm exhibited diffusivities of 5.97x10(-8) and 6.28x10(-8) m(2)/s, respectively, which compare favorably with bulk values.
authors.affiliation: Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Demko
authors.forename: Zhenting
authors.initials: Z
authors.lastname: Dai
authors.forename: Han
authors.initials: H
authors.lastname: Yan
authors.forename: William P
authors.initials: WP
authors.lastname: King
authors.forename: Miko
authors.initials: M
authors.lastname: Cakmak
authors.forename: Alexis R
authors.initials: AR
authors.lastname: Abramson