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Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen

Liu, Yuanfang ; Chen, Wei ; Joly, Alan G. ; Wang, Yuqing ; Pope, Carey ; Zhang, Yongbin ; Bovin, Jan-Olov LU and Sherwood, Peter (2006) In The Journal of Physical Chemistry Part B 110(34). p.16992-17000
Abstract
It is commonly believed that high-quality CdTe nanoparticles with strong luminescence can only be prepared under the protection of an inert gas such as nitrogen or argon. Here, we report the preparation of highly luminescent CdTe nnaoparticles in air and compare their luminescence properties with CdTe nanoparticles made in nitrogen. We find that both water-soluble CdTe nanoparticles made in air and in nitrogen exhibit strong photoluminescence as well as upconversion luminescence at room temperature. However, differences do exist between the particles made in air and those made in nitrogen. In particular, the particles prepared in air display a faster growth rate, grow to larger sizes, and display stronger electron coupling relative to the... (More)
It is commonly believed that high-quality CdTe nanoparticles with strong luminescence can only be prepared under the protection of an inert gas such as nitrogen or argon. Here, we report the preparation of highly luminescent CdTe nnaoparticles in air and compare their luminescence properties with CdTe nanoparticles made in nitrogen. We find that both water-soluble CdTe nanoparticles made in air and in nitrogen exhibit strong photoluminescence as well as upconversion luminescence at room temperature. However, differences do exist between the particles made in air and those made in nitrogen. In particular, the particles prepared in air display a faster growth rate, grow to larger sizes, and display stronger electron coupling relative to the particles prepared in nitrogen. X-ray photoelectron spectroscopy analysis indicates that the oxygen content in the nanoparticles synthesized in air is higher that that in particles synthesized in N-2, likely resulting in a higher availability of excess free cadmium. Cytotoxicity measurements reveal that the particles made in air appear slightly more toxic, possibly due to the excess of free cadmium. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
110
issue
34
pages
16992 - 17000
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000239990600029
  • scopus:33748803597
ISSN
1520-5207
DOI
10.1021/jp063085k
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
id
48516d7f-92eb-40fe-90ee-d073ce19f01d (old id 395072)
date added to LUP
2016-04-01 15:53:26
date last changed
2020-06-17 02:46:43
@article{48516d7f-92eb-40fe-90ee-d073ce19f01d,
  abstract     = {It is commonly believed that high-quality CdTe nanoparticles with strong luminescence can only be prepared under the protection of an inert gas such as nitrogen or argon. Here, we report the preparation of highly luminescent CdTe nnaoparticles in air and compare their luminescence properties with CdTe nanoparticles made in nitrogen. We find that both water-soluble CdTe nanoparticles made in air and in nitrogen exhibit strong photoluminescence as well as upconversion luminescence at room temperature. However, differences do exist between the particles made in air and those made in nitrogen. In particular, the particles prepared in air display a faster growth rate, grow to larger sizes, and display stronger electron coupling relative to the particles prepared in nitrogen. X-ray photoelectron spectroscopy analysis indicates that the oxygen content in the nanoparticles synthesized in air is higher that that in particles synthesized in N-2, likely resulting in a higher availability of excess free cadmium. Cytotoxicity measurements reveal that the particles made in air appear slightly more toxic, possibly due to the excess of free cadmium.},
  author       = {Liu, Yuanfang and Chen, Wei and Joly, Alan G. and Wang, Yuqing and Pope, Carey and Zhang, Yongbin and Bovin, Jan-Olov and Sherwood, Peter},
  issn         = {1520-5207},
  language     = {eng},
  number       = {34},
  pages        = {16992--17000},
  publisher    = {The American Chemical Society (ACS)},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen},
  url          = {http://dx.doi.org/10.1021/jp063085k},
  doi          = {10.1021/jp063085k},
  volume       = {110},
  year         = {2006},
}