Crystal Facet Engineering of CoPt Quantum Dots for Diverse Colloidal Heterostructures

• DOI: 10.1021/acs.jpclett.0c01993
• Publication Date: 2020-07-30T09:04:55Z
• Authors: Mahima Makkar; Goutam Prakash; Ranjani Viswanatha
• Keywords: Facet (psychology); Dumbbell; Crystal (programming language)

Precise control of crystal orientation, and specifically the exposed surface, is critical for engineering heterostructures. Here, using CoPt as a model system, we explore energetics to expose suitable facets promote required heterostructure formation. Different heterostructures are grown ranging from core/shell structure, diffused interface, dumbbell structured dimers, embedded island structures wherein these hybrids fabricated via micro/macrolevel facet-selective growth. The reaction conditions used achieve such diversity starting same seed offer insights into growth mechanisms Such microscopic understanding surface chemistry paves way design new with exciting properties.