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The trouble with ODE : polymerization during nanocrystal synthesis

(2019) NANO LETTERS. 19(10). p.7411-7417
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Abstract
1-Octadecene is a widely used solvent for high temperature nanocrystal synthesis (120-320 degrees C). Here, we show that 1-octadecene spontaneously polymerizes under these conditions, and the resulting poly(1-octadecene) has a comparable solubility and size to nanocrystals stabilized by hydrophobic ligands. Typical purification procedures (precipitation/redispersion cycles or size exclusion chromatography) fail to separate the poly(1-octadecene) impurity from the nanocrystal product. To avoid formation of poly(1-octadecene), we replace 1-octadecene with saturated, aliphatic solvents. Alternatively, the nanocrystals' native ligands are exchanged for polar ligands, leading to significant solubility differences between nanocrystals and poly(1-octadecene), therefore allowing isolation of pure nanocrystals, free from polymer impurities. These results will help design superior syntheses and improve nanocrystal purity, an important factor in many applications.
Keywords
Quantum dots, nanoparticles, octadecene, surface chemistry, ONE-POT SYNTHESIS, OCTYLPHOSPHINE OXIDE TOPO, PHOSPHINE-FREE SYNTHESIS, QUANTUM DOTS, SURFACE-CHEMISTRY, HIGH-QUALITY, LIGANDS, CDSE, SIZE, IDENTIFICATION

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Citation

Please use this url to cite or link to this publication:

MLA
Dhaene, Evert, et al. “The Trouble with ODE : Polymerization during Nanocrystal Synthesis.” NANO LETTERS, vol. 19, no. 10, 2019, pp. 7411–17.
APA
Dhaene, E., Billet, J., Bennett, E., Van Driessche, I., & De Roo, J. (2019). The trouble with ODE : polymerization during nanocrystal synthesis. NANO LETTERS, 19(10), 7411–7417.
Chicago author-date
Dhaene, Evert, Jonas Billet, Ellie Bennett, Isabel Van Driessche, and Jonathan De Roo. 2019. “The Trouble with ODE : Polymerization during Nanocrystal Synthesis.” NANO LETTERS 19 (10): 7411–17.
Chicago author-date (all authors)
Dhaene, Evert, Jonas Billet, Ellie Bennett, Isabel Van Driessche, and Jonathan De Roo. 2019. “The Trouble with ODE : Polymerization during Nanocrystal Synthesis.” NANO LETTERS 19 (10): 7411–7417.
Vancouver
1.
Dhaene E, Billet J, Bennett E, Van Driessche I, De Roo J. The trouble with ODE : polymerization during nanocrystal synthesis. NANO LETTERS. 2019;19(10):7411–7.
IEEE
[1]
E. Dhaene, J. Billet, E. Bennett, I. Van Driessche, and J. De Roo, “The trouble with ODE : polymerization during nanocrystal synthesis,” NANO LETTERS, vol. 19, no. 10, pp. 7411–7417, 2019.
@article{8628934,
  abstract     = {1-Octadecene is a widely used solvent for high temperature nanocrystal synthesis (120-320 degrees C). Here, we show that 1-octadecene spontaneously polymerizes under these conditions, and the resulting poly(1-octadecene) has a comparable solubility and size to nanocrystals stabilized by hydrophobic ligands. Typical purification procedures (precipitation/redispersion cycles or size exclusion chromatography) fail to separate the poly(1-octadecene) impurity from the nanocrystal product. To avoid formation of poly(1-octadecene), we replace 1-octadecene with saturated, aliphatic solvents. Alternatively, the nanocrystals' native ligands are exchanged for polar ligands, leading to significant solubility differences between nanocrystals and poly(1-octadecene), therefore allowing isolation of pure nanocrystals, free from polymer impurities. These results will help design superior syntheses and improve nanocrystal purity, an important factor in many applications.},
  author       = {Dhaene, Evert and Billet, Jonas and Bennett, Ellie and Van Driessche, Isabel and De Roo, Jonathan},
  issn         = {1530-6984},
  journal      = {NANO LETTERS},
  keywords     = {Quantum dots,nanoparticles,octadecene,surface chemistry,ONE-POT SYNTHESIS,OCTYLPHOSPHINE OXIDE TOPO,PHOSPHINE-FREE SYNTHESIS,QUANTUM DOTS,SURFACE-CHEMISTRY,HIGH-QUALITY,LIGANDS,CDSE,SIZE,IDENTIFICATION},
  language     = {eng},
  number       = {10},
  pages        = {7411--7417},
  title        = {The trouble with ODE : polymerization during nanocrystal synthesis},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.9b03088},
  volume       = {19},
  year         = {2019},
}

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