Direct cation exchange of CdSe nanocrystals into ZnSe enabled by controlled binding between guest cations and organic ligands

Nanoscale
Sooho LeeDoh C Lee

Abstract

Zn chalcogenides are suitable candidates for blue-emitting fluorophores in light-emitting devices. In particular, the efforts to grow ZnSe nanocrystals (NCs) with fine control over size and shape via bottom-up approaches have faced challenges because of the slow decomposition of Zn precursors. In this study, we report direct cation exchange from CdSe NCs to ZnSe. Absorption spectroscopy and density functional theory (DFT) analysis reveal that the reactivity of cation exchange depends on the degree of complexation between organic ligands and Zn halides. We controlled the binding strength of Zn complexes by changing the organic ligands and halogen species that bind with Zn. Appropriate binding strength allows for the release of Zn ions and their facile incorporation into CdSe seed NCs. Under our experimental conditions, trioctylphosphine oxide (TOPO)-ZnI2 drives the efficient cation exchange reaction whereas TOPO-ZnCl2 induces no cation exchange of CdSe NCs. In addition, functional groups vary the binding strength between Zn and ligands. Oleylamine (OLAm)-ZnI2, which has a weaker ligand-ZnI2 binding than TOPO-ZnI2, breaks down the original morphologies of host CdSe NCs due to the very fast exchange rate. On the other hand, the TO...Continue Reading

References

Jun 15, 1996·Physical Review. B, Condensed Matter·D J Norris, M G Bawendi
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jun 13, 2002·Journal of the American Chemical Society·Liberato MannaA Paul Alivisatos
Jul 10, 2003·Journal of the American Chemical Society·Xinhua ZhongWolfgang Knoll
Nov 6, 2004·Science·Dong Hee SonA Paul Alivisatos
Mar 18, 2008·Journal of the American Chemical Society·Jeffrey M PietrygaJennifer A Hollingsworth
Jan 3, 2009·Nature Nanotechnology·Andrew M SmithShuming Nie
Feb 12, 2009·ACS Nano·Denis O DemchenkoLin-Wang Wang
Oct 26, 2010·Chemical Society Reviews·Celso de Mello Donegá
Oct 25, 2011·Nature Materials·S IthurriaAl L Efros
Feb 6, 2014·The Journal of Physical Chemistry Letters·Ilan Jen-La PlanteTaleb Mokari
Jan 23, 2016·Nature Materials·Michael A BolesDmitri V Talapin
Feb 19, 2016·Chemical Reviews·Luca De Trizio, Liberato Manna
Jun 1, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Jayesh R ShimpiBhagavatula L V Prasad
Jul 15, 2017·Chemistry of Materials : a Publication of the American Chemical Society·Francesca PietraArjan J Houtepen

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray

Software Mentioned

Jaguar
Vienna ab initio Simulation Package ( VASP )
TOPO

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.