Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 18, Pages 7984-7992Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b03075
Keywords
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Funding
- National Science Foundation [CHE-1552164, CHE-1565520, DMR-1408617, ECC-1542101]
- NSF MRSEC through Columbia in the Center for Precision Assembly of Superstratic and Superatomic Solids [DMR-1420634]
- DOE Office of Science [DE-SC0012704]
- University of Washington
- Molecular Engineering & Sciences Institute
- Clean Energy Institute
- National Institutes of Health
- Student Technology Fee
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1552164, 1565520] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1408617] Funding Source: National Science Foundation
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Magic-sized clusters (MSCs) can provide valuable insight into the atomically precise progression of semiconductor nanocrystal transformations. We report the conversion of an InP MSC to a Cd3P2 MSC through a cation exchange mechanism and attempt to shed light on the evolution of the physical and electronic structure of the clusters during the transformation. Utilizing a combination of spectroscopic (NMR/UV-vis) and structural characterization (ICP-OES/MS/PXRD/XPS/PDF) tools, we demonstrate retention of the original InP MSC crystal lattice as Z-type ligand exchange initially occurs. Further cation exchange induces lattice relaxation and a significant structural rearrangement. These observations contrast with reports of cation exchange in InP quantum dots, indicating unique reactivity of the InP MSC.
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