Timing matters: the underappreciated role of temperature ramp rate for shape control and reproducibility of quantum dot synthesis

William J. Baumgardner, Zewei Quan, Jiye Fang, Tobias Hanrath

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Understanding the coupled kinetic and thermodynamics factors governing colloidal nanocrystals nucleation and growth are critical factors in the predictable and reproducible synthesis of advanced nanomaterials. We show that the temporal temperature profile is decisive in tuning the particle shape from pseudo-spherical to monodisperse cubes. The shape of the nanocrystals was characterized by transmission electron microscopy and X-ray diffraction. We introduce a mechanism for the shape controlled synthesis in the context of temperature-dependent nucleation and growth and provide experimental evidence to support it. © 2013 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)3625
JournalNanoscale
Volume4
Issue number12
DOIs
StatePublished - 2012
Externally publishedYes

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