Concurrent thermal conductivity measurement and internal structure observation of individual one-dimensional materials using scanning transmission electron microscopy

The thermal conductivity of individual nanomaterials can vary from sample to due the difference in geometries and internal structures, thus, concurrent structure observation measurement at nanoscale are highly desired but challenging. Here, we have developed an experimental method that allows concurrently situ real-time a single one-dimensional (1D) material using scanning transmission electron microscopy (STEM) microscope. In this method, two ends 1D nanomaterial bonded on tungsten probe suspended platinum nanofilm, respectively. nanofilm serves simultaneously as heater resistance thermometer, ensuring sensitive measurements. is fabricated edge silicon wafer so beam transmit through be detected by STEM detector, which caters for inner nanostructure. Using measured conductivities cup-stacked carbon nanotubes observed hollow structures. We found with more structural disorders had lower conductivity. Our pave way sample-by-sample elucidation structure–property relationship materials.