Copper Doping in II-VI Semiconductor Nanocrystals: Single-Particle Fluorescence Study

The Journal of Physical Chemistry Letters
Payel MondalRanjani Viswanatha

Abstract

Copper doping in II-VI semiconductor nanocrystals (NCs) has sparked enormous debate regarding the oxidation state of Cu ions and their hugely differing consequences in optoelectronic applications. The identity of a magnetically active Cu2+ ion or a magnetically inactive d10 Cu+ ion has generally been probed using optical techniques, and confusion arises from the spatial clutter that is part of the technique. One major probe that could declutter the data obtained from ensemble emission is single-particle fluorescence spectroscopy. In this work, using this very technique along with X-ray absorption spectroscopy probing the local environment of dopant ions, we study Cu-doped II-VI semiconductor NCs to find conclusive evidence on the oxidation state of Cu dopants and hence the mechanism of their emission. Detailed analysis of blinking properties has been used to study the single-particle nature of the NCs.

References

Dec 15, 2005·Journal of the American Chemical Society·Narayan PradhanXiaogang Peng
Nov 10, 2006·The Journal of Physical Chemistry. B·Ranjani ViswanathaD D Sarma
Jan 28, 2009·The Journal of Physical Chemistry. a·Carley CorradoJin Z Zhang
Jul 11, 2009·Journal of the American Chemical Society·Renguo Xie, Xiaogang Peng
Apr 7, 2010·Chemical Communications : Chem Comm·Santanu JanaNarayan Pradhan
Dec 29, 2010·Journal of the American Chemical Society·Bhupendra B SrivastavaNarayan Pradhan
Sep 29, 2011·Nano Letters·Ranjani ViswanathaVictor I Klimov
May 16, 2012·The Journal of Chemical Physics·E A RileyP J Reid
Mar 25, 2014·The Journal of Chemical Physics·Nicole AmeckeFrank Cichos
Jul 6, 2014·The Journal of Physical Chemistry. B·Chelsea M HessPhilip J Reid
Aug 19, 2015·The Journal of Physical Chemistry Letters·G Krishnamurthy GrandhiRanjani Viswanatha
Feb 7, 2013·The Journal of Physical Chemistry Letters·G Krishnamurthy Grandhi, Ranjani Viswanatha
Aug 4, 2016·Nature Nanotechnology·Alexander L Efros, David J Nesbitt
Apr 20, 2017·Journal of the American Chemical Society·Heidi D NelsonDaniel R Gamelin
Apr 22, 2017·The Journal of Physical Chemistry Letters·G Krishnamurthy Grandhi, Ranjani Viswanatha
Dec 30, 2017·ACS Nano·Kira E HughesDaniel R Gamelin
Apr 20, 2018·Nature Communications·Bihu LvMin Xiao

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

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.