Abstract
Langmuir film properties, UV-vis spectroscopy, epifluorescence microscopy, and transmission electron microscopy were used to study CdSe quantum dots (QDs) in 2D. By combining these results, it was possible to determine the molar absorptivity, limiting nanoparticle area, luminescence property, and arrangement of the QDs in the monolayer films at the air-water interface. Either trioctylphosphine oxide (TOPO) or 1-octadecanethiol (ODT) stabilized the QDs. The data collected reveal that TOPO forms close-packed monolayers on the surface of the QDs and that ODT-stabilized QDs undergo alkyl chains interdigitation. It was also found that varying the nanoparticle size, nature of surfactant, surface pressure, and mixed monolayers could help engineer the 2D self-assembly of the QDs at the air-water interface. Of practical importance is the transfer of these monolayer films onto hydrophilic or hydrophobic solid substrates, which could be successfully accomplished via the Langmuir-Blodgett film deposition technique.
| Original language | English |
|---|---|
| Pages (from-to) | 14640-14646 |
| Number of pages | 7 |
| Journal | Journal of the American Chemical Society |
| Volume | 127 |
| Issue number | 42 |
| DOIs | |
| State | Published - Nov 1 2005 |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
Characterization and 2D self-assembly of CdSe quantum dots at the air-water interface. / Gattás-Asfura, Kerim M.; Constantine, Celeste A.; Lynn, Matthew J.; Thimann, Daniel A.; Ji, Xiaojun; Leblanc, Roger.
In: Journal of the American Chemical Society, Vol. 127, No. 42, 01.11.2005, p. 14640-14646.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization and 2D self-assembly of CdSe quantum dots at the air-water interface
AU - Gattás-Asfura, Kerim M.
AU - Constantine, Celeste A.
AU - Lynn, Matthew J.
AU - Thimann, Daniel A.
AU - Ji, Xiaojun
AU - Leblanc, Roger
PY - 2005/11/1
Y1 - 2005/11/1
N2 - Langmuir film properties, UV-vis spectroscopy, epifluorescence microscopy, and transmission electron microscopy were used to study CdSe quantum dots (QDs) in 2D. By combining these results, it was possible to determine the molar absorptivity, limiting nanoparticle area, luminescence property, and arrangement of the QDs in the monolayer films at the air-water interface. Either trioctylphosphine oxide (TOPO) or 1-octadecanethiol (ODT) stabilized the QDs. The data collected reveal that TOPO forms close-packed monolayers on the surface of the QDs and that ODT-stabilized QDs undergo alkyl chains interdigitation. It was also found that varying the nanoparticle size, nature of surfactant, surface pressure, and mixed monolayers could help engineer the 2D self-assembly of the QDs at the air-water interface. Of practical importance is the transfer of these monolayer films onto hydrophilic or hydrophobic solid substrates, which could be successfully accomplished via the Langmuir-Blodgett film deposition technique.
AB - Langmuir film properties, UV-vis spectroscopy, epifluorescence microscopy, and transmission electron microscopy were used to study CdSe quantum dots (QDs) in 2D. By combining these results, it was possible to determine the molar absorptivity, limiting nanoparticle area, luminescence property, and arrangement of the QDs in the monolayer films at the air-water interface. Either trioctylphosphine oxide (TOPO) or 1-octadecanethiol (ODT) stabilized the QDs. The data collected reveal that TOPO forms close-packed monolayers on the surface of the QDs and that ODT-stabilized QDs undergo alkyl chains interdigitation. It was also found that varying the nanoparticle size, nature of surfactant, surface pressure, and mixed monolayers could help engineer the 2D self-assembly of the QDs at the air-water interface. Of practical importance is the transfer of these monolayer films onto hydrophilic or hydrophobic solid substrates, which could be successfully accomplished via the Langmuir-Blodgett film deposition technique.
UR - http://www.scopus.com/inward/record.url?scp=27144548437&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27144548437&partnerID=8YFLogxK
U2 - 10.1021/ja0514848
DO - 10.1021/ja0514848
M3 - Article
C2 - 16231916
AN - SCOPUS:27144548437
VL - 127
SP - 14640
EP - 14646
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 42
ER -