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 μm had a measured diffusivity of 1.21× 10-7 m2 /s; polyimide fibers of diameters 570 and 271 nm exhibited diffusivities of 5.97× 10-8 and 6.28× 10-8 m2 /s, respectively, which compare favorably with bulk values.
Original language | English (US) |
---|---|
Article number | 036103 |
Journal | Review of Scientific Instruments |
Volume | 80 |
Issue number | 3 |
DOIs | |
State | Published - 2009 |
ASJC Scopus subject areas
- Instrumentation