本文以Pb/PbO核殼納米粒子為研究物件，在透射電子顯微鏡中利用聚焦電子束進行原位局域加熱、侵蝕等處理，研究其納米尺度的生長、相變以及相關的熱力學與動力學過程。通過電子束的加熱效應實現了Pb納米芯核的晶化，並利用衍射襯度標定出核殼納米晶氧化物殼層的厚度。通過調節電子束強度，原位引導並觀察了PbO納米殼層包覆Pb納米粒子的液化、分解、凝固與再結晶的系列過程。利用納米電子束的濺射效應對氧化物殼層進行了加工，實現了PbO包裹的Pb納米核液化並定向噴流形成納米流體，並對納米殼層的穩定性進行了分析。論文還對上述過程在納米技術上的可能應用進行了簡要的討論。

　　In this paper, the crystal growth, phase transition and related thermodynamics and kinetics at the nanoscale is investigated based on in-situ heating and eroding ofPb/PbO coreshell nanoparticles with a focused electron beam in a transmission electron microscope (TEM). The crystallization of the amorphous lead nano-core induced by the heating effect under the electron beam irradiation was observed. The distinguishable boundary between the Pb nanocrystal and the amorphous PbO shell produces clear contrast in TEM image, which can be used to measure the thickness of the PbO shell. By timing the intensity of the focused electron beam irradiation, melting, splitting, solidification as well as recrystallization of the PbO-coated Pb nanoparticles was induced and observed on real time. The electron nano-beam was also used to selectively erode the PbO nano-shell and melt the Pb nano-core, which generates nanoscale metal fluid directionally effusing through the cracked oxide shell. The stability of the oxide nanos hell was also analyzed. And the potential application the above processes in nanotechnology is also discussed briefly.