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Single-mode lasing from colloidal water-soluble CdSe/CdS quantum dot-in-rods

Francesco Di Stasio, Joel Q Grim, Vladimir Lesnyak, Prachi Rastogi, Liberato Manna, Iwan Moreels UGent and Roman Krahne (2015) SMALL. 11(11). p.1328-1334
abstract
Core-shell CdSe/CdS nanocrystals are a very promising material for light emitting applications. Their solution-phase synthesis is based on surface-stabilizing ligands that make them soluble in organic solvents, like toluene or chloroform. However, solubility of these materials in water provides many advantages, such as additional process routes and easier handling. So far, solubilization of CdSe/CdS nanocrystals in water that avoids detrimental effects on the luminescent properties poses a major challenge. This work demonstrates how core-shell CdSe/CdS quantum dot-in-rods can be transferred into water using a ligand exchange method employing mercaptopropionic acid (MPA). Key to maintaining the light-emitting properties is an enlarged CdS rod diameter, which prevents potential surface defects formed during the ligand exchange from affecting the photophysics of the dot-in-rods. Films made from water-soluble dot-in-rods show amplified spontaneous emission (ASE) with a similar threshold (130 mu J/cm(2)) as the pristine material (115 mu J/cm(2)). To demonstrate feasibility for lasing applications, self-assembled microlasers are fabricated via the "coffee-ring effect" that display single-mode operation and a very low threshold of similar to 10 mu J/cm(2). The performance of these microlasers is enhanced by the small size of MPA ligands, enabling a high packing density of the dot-in-rods.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
AMPLIFIED SPONTANEOUS EMISSION, STIMULATED-EMISSION, OPTICAL GAIN, NANOCRYSTALS, NANORODS, BLUE, THRESHOLD, SURFACE, OPALS, FILMS
journal title
SMALL
Small
volume
11
issue
11
pages
1328 - 1334
Web of Science type
Article
Web of Science id
000352284700011
JCR category
MATERIALS SCIENCE, MULTIDISCIPLINARY
JCR impact factor
8.315 (2015)
JCR rank
20/271 (2015)
JCR quartile
1 (2015)
ISSN
1613-6810
1613-6829
DOI
10.1002/smll.201402527
language
English
UGent publication?
no
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8538122
handle
http://hdl.handle.net/1854/LU-8538122
date created
2017-11-20 12:03:17
date last changed
2018-01-29 12:12:17
@article{8538122,
  abstract     = {Core-shell CdSe/CdS nanocrystals are a very promising material for light emitting applications. Their solution-phase synthesis is based on surface-stabilizing ligands that make them soluble in organic solvents, like toluene or chloroform. However, solubility of these materials in water provides many advantages, such as additional process routes and easier handling. So far, solubilization of CdSe/CdS nanocrystals in water that avoids detrimental effects on the luminescent properties poses a major challenge. This work demonstrates how core-shell CdSe/CdS quantum dot-in-rods can be transferred into water using a ligand exchange method employing mercaptopropionic acid (MPA). Key to maintaining the light-emitting properties is an enlarged CdS rod diameter, which prevents potential surface defects formed during the ligand exchange from affecting the photophysics of the dot-in-rods. Films made from water-soluble dot-in-rods show amplified spontaneous emission (ASE) with a similar threshold (130 mu J/cm(2)) as the pristine material (115 mu J/cm(2)). To demonstrate feasibility for lasing applications, self-assembled microlasers are fabricated via the {\textacutedbl}coffee-ring effect{\textacutedbl} that display single-mode operation and a very low threshold of similar to 10 mu J/cm(2). The performance of these microlasers is enhanced by the small size of MPA ligands, enabling a high packing density of the dot-in-rods.},
  author       = {Di Stasio, Francesco and Grim, Joel Q and Lesnyak, Vladimir and Rastogi, Prachi and Manna, Liberato and Moreels, Iwan and Krahne, Roman},
  issn         = {1613-6810},
  journal      = {SMALL},
  keyword      = {AMPLIFIED SPONTANEOUS EMISSION,STIMULATED-EMISSION,OPTICAL GAIN,NANOCRYSTALS,NANORODS,BLUE,THRESHOLD,SURFACE,OPALS,FILMS},
  language     = {eng},
  number       = {11},
  pages        = {1328--1334},
  title        = {Single-mode lasing from colloidal water-soluble CdSe/CdS quantum dot-in-rods},
  url          = {http://dx.doi.org/10.1002/smll.201402527},
  volume       = {11},
  year         = {2015},
}

Chicago
Di Stasio, Francesco, Joel Q Grim, Vladimir Lesnyak, Prachi Rastogi, Liberato Manna, Iwan Moreels, and Roman Krahne. 2015. “Single-mode Lasing from Colloidal Water-soluble CdSe/CdS Quantum Dot-in-rods.” Small 11 (11): 1328–1334.
APA
Di Stasio, F., Grim, J. Q., Lesnyak, V., Rastogi, P., Manna, L., Moreels, I., & Krahne, R. (2015). Single-mode lasing from colloidal water-soluble CdSe/CdS quantum dot-in-rods. SMALL, 11(11), 1328–1334.
Vancouver
1.
Di Stasio F, Grim JQ, Lesnyak V, Rastogi P, Manna L, Moreels I, et al. Single-mode lasing from colloidal water-soluble CdSe/CdS quantum dot-in-rods. SMALL. 2015;11(11):1328–34.
MLA
Di Stasio, Francesco, Joel Q Grim, Vladimir Lesnyak, et al. “Single-mode Lasing from Colloidal Water-soluble CdSe/CdS Quantum Dot-in-rods.” SMALL 11.11 (2015): 1328–1334. Print.