TY  - JOUR
AU  - Thiry, Marc
AU  - Boldt, Klaus
AU  - Nikolić, Marija
AU  - Schulz, Florian
AU  - Ijeh, Michael
AU  - Panicker, Andjana
AU  - Vossmeyer, Tobias
AU  - Weller, Horst
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1884
AB  - In this contribution a facile, one-step synthesis of tridentate thiol-functionalized PEO ligands and their ability to stabilize CdSe/CdS/ZnS core-shell-shell nanoparticles In aqueous media are described. The PEO-coated quantum dots show colloidal stability as well as preserved fluorescence even at very low concentrations of a few nM. For improved ligand attachment and enhanced fluorescence properties a method for ligand exchange was developed, which includes formation of a ligand zinc complex before the actual exchange reaction. The stability and fluorescence properties in various aqueous buffers and cell media and at pH values down to pH 3 were investigated. The firm binding of the tridentate ligands to the particle surface makes this ligand particle system a promising tool for biological applications. In addition, activation of the ligands' terminal hydroxyl group for covalent biofunctionalization by esterification with succinic acid is reported.
PB  - Amer Chemical Soc, Washington
T2  - ACS Nano
T1  - Fluorescence Properties of Hydrophilic Semiconductor Nanoparticles with Tridentate Polyethylene Oxide Ligands
EP  - 4973
IS  - 6
SP  - 4965
VL  - 5
DO  - 10.1021/nn201065y
ER  - 

@article{
author = "Thiry, Marc and Boldt, Klaus and Nikolić, Marija and Schulz, Florian and Ijeh, Michael and Panicker, Andjana and Vossmeyer, Tobias and Weller, Horst",
year = "2011",
abstract = "In this contribution a facile, one-step synthesis of tridentate thiol-functionalized PEO ligands and their ability to stabilize CdSe/CdS/ZnS core-shell-shell nanoparticles In aqueous media are described. The PEO-coated quantum dots show colloidal stability as well as preserved fluorescence even at very low concentrations of a few nM. For improved ligand attachment and enhanced fluorescence properties a method for ligand exchange was developed, which includes formation of a ligand zinc complex before the actual exchange reaction. The stability and fluorescence properties in various aqueous buffers and cell media and at pH values down to pH 3 were investigated. The firm binding of the tridentate ligands to the particle surface makes this ligand particle system a promising tool for biological applications. In addition, activation of the ligands' terminal hydroxyl group for covalent biofunctionalization by esterification with succinic acid is reported.",
publisher = "Amer Chemical Soc, Washington",
journal = "ACS Nano",
title = "Fluorescence Properties of Hydrophilic Semiconductor Nanoparticles with Tridentate Polyethylene Oxide Ligands",
pages = "4973-4965",
number = "6",
volume = "5",
doi = "10.1021/nn201065y"
}

Thiry, M., Boldt, K., Nikolić, M., Schulz, F., Ijeh, M., Panicker, A., Vossmeyer, T.,& Weller, H.. (2011). Fluorescence Properties of Hydrophilic Semiconductor Nanoparticles with Tridentate Polyethylene Oxide Ligands. in ACS Nano
Amer Chemical Soc, Washington., 5(6), 4965-4973.
https://doi.org/10.1021/nn201065y

Thiry M, Boldt K, Nikolić M, Schulz F, Ijeh M, Panicker A, Vossmeyer T, Weller H. Fluorescence Properties of Hydrophilic Semiconductor Nanoparticles with Tridentate Polyethylene Oxide Ligands. in ACS Nano. 2011;5(6):4965-4973.
doi:10.1021/nn201065y .

Thiry, Marc, Boldt, Klaus, Nikolić, Marija, Schulz, Florian, Ijeh, Michael, Panicker, Andjana, Vossmeyer, Tobias, Weller, Horst, "Fluorescence Properties of Hydrophilic Semiconductor Nanoparticles with Tridentate Polyethylene Oxide Ligands" in ACS Nano, 5, no. 6 (2011):4965-4973,
https://doi.org/10.1021/nn201065y . .

TY  - JOUR
AU  - Vossmeyer, Tobias
AU  - Katsikas, Lynne
AU  - Giersig, M.
AU  - Popović, Ivanka
AU  - Diesner, K.
AU  - Chemseddine, A.
AU  - Eychmüller, A.
AU  - Weller, Horst
PY  - 1994
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/56
AB  - Improved synthetic routes and size-selective precipitation have enabled the preparation of almost monodisperse CdS clusters. Six samples of 1-thioglycerol stabilized clusters with diameters of approximately 13, 14, 16, 19, 23, and 39 Å have been prepared as fully redispersible powders and were characterized by elemental analysis, powder X-ray diffraction, electron microscopy, thermogravimetric analysis, and UV-vis spectroscopy. Small-angle X-ray scattering was used to determine the mean cluster size. The well-structured UV-vis spectra reveal that the size-dependent shift of the 1s-1s excitonic transition is in agreement with the tight-binding theory and the pseudopotential theory. Moreover, as expected by quantum mechanical calculations the oscillator strength of the transition increases proportional to 1/r3. UV-vis spectra taken at various temperatures between 4 and 295 K have shown that the temperature shift of the excitonic transition energy becomes stronger with decreasing particle size. Strong, reversible absorbance shifts were observed, upon transferring the clusters from their solutions onto quartz plates and vice versa.
T2  - Journal of Physical Chemistry
T1  - CdS nanoclusters: Synthesis, characterization, size dependent oscillator strength, temperature shift of the excitonic transition energy, and reversible absorbance shift
EP  - 7673
IS  - 31
SP  - 7665
VL  - 98
DO  - 10.1021/j100082a044
ER  - 

@article{
author = "Vossmeyer, Tobias and Katsikas, Lynne and Giersig, M. and Popović, Ivanka and Diesner, K. and Chemseddine, A. and Eychmüller, A. and Weller, Horst",
year = "1994",
abstract = "Improved synthetic routes and size-selective precipitation have enabled the preparation of almost monodisperse CdS clusters. Six samples of 1-thioglycerol stabilized clusters with diameters of approximately 13, 14, 16, 19, 23, and 39 Å have been prepared as fully redispersible powders and were characterized by elemental analysis, powder X-ray diffraction, electron microscopy, thermogravimetric analysis, and UV-vis spectroscopy. Small-angle X-ray scattering was used to determine the mean cluster size. The well-structured UV-vis spectra reveal that the size-dependent shift of the 1s-1s excitonic transition is in agreement with the tight-binding theory and the pseudopotential theory. Moreover, as expected by quantum mechanical calculations the oscillator strength of the transition increases proportional to 1/r3. UV-vis spectra taken at various temperatures between 4 and 295 K have shown that the temperature shift of the excitonic transition energy becomes stronger with decreasing particle size. Strong, reversible absorbance shifts were observed, upon transferring the clusters from their solutions onto quartz plates and vice versa.",
journal = "Journal of Physical Chemistry",
title = "CdS nanoclusters: Synthesis, characterization, size dependent oscillator strength, temperature shift of the excitonic transition energy, and reversible absorbance shift",
pages = "7673-7665",
number = "31",
volume = "98",
doi = "10.1021/j100082a044"
}

Vossmeyer, T., Katsikas, L., Giersig, M., Popović, I., Diesner, K., Chemseddine, A., Eychmüller, A.,& Weller, H.. (1994). CdS nanoclusters: Synthesis, characterization, size dependent oscillator strength, temperature shift of the excitonic transition energy, and reversible absorbance shift. in Journal of Physical Chemistry, 98(31), 7665-7673.
https://doi.org/10.1021/j100082a044

Vossmeyer T, Katsikas L, Giersig M, Popović I, Diesner K, Chemseddine A, Eychmüller A, Weller H. CdS nanoclusters: Synthesis, characterization, size dependent oscillator strength, temperature shift of the excitonic transition energy, and reversible absorbance shift. in Journal of Physical Chemistry. 1994;98(31):7665-7673.
doi:10.1021/j100082a044 .

Vossmeyer, Tobias, Katsikas, Lynne, Giersig, M., Popović, Ivanka, Diesner, K., Chemseddine, A., Eychmüller, A., Weller, Horst, "CdS nanoclusters: Synthesis, characterization, size dependent oscillator strength, temperature shift of the excitonic transition energy, and reversible absorbance shift" in Journal of Physical Chemistry, 98, no. 31 (1994):7665-7673,
https://doi.org/10.1021/j100082a044 . .