Influence of the Electron Beam and the Choice of Heating Membrane on the Evolution of Si Nanowires' Morphology in In Situ TEM.

ABSTRACT: We used in situ transmission electron microscopy (TEM) to observe the dynamic changes of Si nanowires under electron beam irradiation. We found evidence of structural evolutions under TEM observation due to a combination of electron beam and thermal effects. Two types of heating holders were used: a carbon membrane, and a silicon nitride membrane. Different evolution of Si nanowires on these membranes was observed. Regarding the heating of Si nanowires on a C membrane at 800 °C and above, a serious degradation dependent on the diameter of the Si nanowire was observed under the electron beam, with the formation of Si carbide. When the membrane was changed to Si nitride, a reversible sectioning and welding of the Si nanowire was observed.

SUBMITTER: Shen Y 

PROVIDER: S-EPMC9369465 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature