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UC Berkeley

2 ARTICLES PUBLISHED IN JoVE

Chemistry

Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals

Karthish Manthiram^*1,4, Brandon J. Beberwyck^*2,4, Dmitri V. Talapin^5,6, A. Paul Alivisatos^2,3,4

¹Department of Chemical Engineering, UC Berkeley, ²Department of Materials Science and Engineering, UC Berkeley, ³Department of Chemistry, UC Berkeley, ⁴Materials Sciences Division, Lawrence Berkeley National Laboratory, ⁵Department of Chemistry, University of Chicago, ⁶Center for Nanoscale Materials, Argonne National Laboratory

A protocol for the seeded synthesis of rod-shaped and tetrapod-shaped multicomponent nanostructures consisting of CdS and CdSe is presented.

Chemistry

Using Graphene Liquid Cell Transmission Electron Microscopy to Study in Situ Nanocrystal Etching

Matthew R. Hauwiller¹, Justin C. Ondry¹, A. Paul Alivisatos^1,2,3,4

¹Department of Chemistry, University of California-Berkeley, ²Department of Material Science and Engineering, University of California-Berkeley, ³Kavli Energy NanoScience Institute, ⁴Materials Sciences Division, Lawrence Berkeley National Laboratory

Graphene liquid cell electron microscopy can be used to observe nanocrystal dynamics in a liquid environment with greater spatial resolution than other liquid cell electron microscopy techniques. Etching premade nanocrystals and following their shape using graphene liquid cell Transmission Electron Microscopy can yield important mechanistic information about nanoparticle transformations.