In Situ TEM Observation of Electric Field-Directed Self-Assembly of PbS and PbSe Nanoparticles.

ABSTRACT: Nano-sized particles of semiconducting lead sulfide and selenide and their 2D thin layers show high potential in applications, such as field-effect transistors, photodetectors, solar cells, and thermoelectric devices. The generation of PbS and PbSe nanobars and nanocubes is evoked by in situ electron beam treatment, leading to the formation of thin, extended 2D nanolayers. The initial single crystals are decomposed via sublimation of PbS and PbSe in terms of molecular and atomic fragments, which finally condense on the cold substrate to form nanostructures. The fragments in the gas phase were proven using mass spectrometry. In the case of PbS, Pb+ and PbS+ species could were detected, whereas PbSe disintegrated into Pb+, Se2+, and PbSe+. The threshold current that initiates fragmentation i

SUBMITTER: Zelenina I 

PROVIDER: S-EPMC12388880 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature