In situ liquid cell TEM observation of solution-mediated interaction behaviour of Au/CdS nanoclusters

作者: Yulian Wu , Xin Chen , Chang Li , Jiali Fang , Haiyang Liu

DOI: 10.1039/C9NJ03520F

关键词: SemiconductorChemistryDissolutionTransmission electron microscopyAqueous solutionChemical engineeringNanocompositeNanoclustersPhotocatalysisLiquid bubble

摘要: Gold (Au)–cadmium sulfide (CdS) nanocomposites have attracted widespread attention for semiconductor-based photocatalysis applications. Understanding the dynamic behaviours of Au–CdS nanoclusters (NCs) in liquid solution is critical fine control composite structure, and helps design development future materials with improved catalytic properties. Here, we report direct observation Au CdS NCs water N,N-dimethylformamide (DMF) aqueous by situ cell transmission electron microscopy (LC-TEM). Electron beam induced motion/bubble formation found to be effective guiding NCs’ motion interaction behaviours. The combined better each other DMF than pure water. Around a thicker region, droplets keep growing, show an overlap-like phenomenon TEM images due their 3-D morphologies. proceeding front can further facilitate lighter dynamically approach connect heavier NCs. On hand, thinner regions, irradiation not only caused bubble growth, but also dissolution composite. These results provide in-depth understanding nanoscale liquid–solid interactions semiconductor–metal structures.

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