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Crystal Facet Engineering of CoPt Quantum Dots for Diverse Colloidal Heterostructures.

Ranjani ViswanathaGoutam PrakashRanjani Viswanatha
Published in: The journal of physical chemistry letters (2020)
Precise control of crystal orientation, and specifically the exposed surface, is critical for the engineering of heterostructures. Here, using CoPt as a model system, we explore the energetics to expose suitable facets to promote the required heterostructure formation. Different heterostructures are grown ranging from core/shell structure, diffused interface, dumbbell structured dimers, and embedded island structures wherein these hybrids are fabricated via micro/macrolevel facet-selective growth. The reaction conditions used to achieve such diversity starting from the same seed offer insights into the growth mechanisms of these heterostructures. Such a microscopic understanding of surface chemistry paves the way for the design of new heterostructures with exciting properties.
Keyphrases
  • room temperature
  • quantum dots
  • high resolution
  • mass spectrometry
  • sensitive detection