Mid-Infrared Photoluminescence of CdS and CdSe Colloidal Quantum Dots

ACS Nano
Kwang Seob Jeong, P Guyot-Sionnest

Abstract

Mid-infrared intraband photoluminescence is observed from CdSe and CdS colloidal quantum dots (CQDs) and core/shell systems when excited by a visible laser. The CQDs show more intraband photoluminescence with dodecanethiol than with other ligands. Core/shells show an increase of the intraband photoluminescence with increasing shell thickness. The detected emission is restricted to below 2900 cm(-1), bounded by the C-H vibrational modes of the organic ligands. Upon photoexcitation in air for all dodecanethiol ligands capped CQD systems studied, the intraband photoluminescence is quenched over time, and emission at lower frequency is observed, which is assigned to laser heating and thermal emission from oxides.

References

Oct 19, 2005·The Journal of Chemical Physics·Philippe Guyot-SionnestDong Yu
Apr 22, 1994·Science·J FaistA Y Cho
Sep 18, 2007·The Journal of Chemical Physics·Anshu Pandey, Philippe Guyot-Sionnest
Nov 8, 2008·Science·Anshu Pandey, Philippe Guyot-Sionnest
Jun 13, 2009·Science·Maksym V KovalenkoDmitri V Talapin
Oct 26, 2011·Nano Letters·Fuming Wang, Nicholas A Melosh
Feb 26, 2013·Nature Nanotechnology·Syed MubeenMartin Moskovits
Apr 3, 2013·Optics Express·Fatih B AtarAli K Okyay
Dec 3, 2013·Journal of the American Chemical Society·Jeffrey D RinehartDaniel R Gamelin
Oct 25, 2014·ACS Nano·Zhiyou DengPhilippe Guyot-Sionnest
Apr 3, 2014·The Journal of Physical Chemistry Letters·Kwang Seob JeongPhilippe Guyot-Sionnest

❮ Previous
Next ❯

Citations

Jan 29, 2016·ACS Nano·Zhiyou Deng, Philippe Guyot-Sionnest
Aug 31, 2016·Topics in Current Chemistry·Freddy T Rabouw, Celso de Mello Donega
Nov 5, 2016·ACS Nano·Konstantin V Reich, Boris I Shklovskii
May 10, 2017·ACS Applied Materials & Interfaces·Tingyi GuCraig B Arnold
Jul 5, 2018·Chemical Communications : Chem Comm·Jihye KimKwang Seob Jeong
Feb 11, 2021·Accounts of Chemical Research·Tian Qiao, Dong Hee Son
Jan 12, 2021·Chemical Reviews·Christopher Melnychuk, Philippe Guyot-Sionnest
Mar 9, 2021·The Journal of Physical Chemistry Letters·Rajesh BeraKwang Seob Jeong
Jan 29, 2019·ACS Applied Materials & Interfaces·Dongsun ChoiKwang Seob Jeong
Nov 2, 2018·The Journal of Physical Chemistry Letters·Zhiyuan Huang, Ming Lee Tang
Feb 27, 2017··Emmanuel LhuillierHerve Cruguel

❮ 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.

© 2022 Meta ULC. All rights reserved