TY  - JOUR
A1  - Kosmella, Sabine
A1  - Venus, Jane
A1  - Hahn, Jennifer
A1  - Prietzel, Claudia Christina
A1  - Koetz, Joachim
T1  - Low-temperature synthesis of polyethyleneimine-entrapped CdS quantum dots
JF  - Chemical physics letters
N2  - This Letter is focused on the one-pot formation of CdS nanoparticles in aqueous medium in presence of polyethyleneimine (PEI). Quantum dots can be obtained by adding a pre-cooled aqueous Na2S solution to a pre-cooled aqueous CdCl2 solution dropwise in presence of PEI.
 Field flow fractionation in combination with TEM experiments show a time dependent agglomeration of individual quantum dots from 1.6 nm up to 3.2 nm in size. The hyperbranched PEI of moderate molar mass (>20000 g/mol) is an excellent polymer to prevent a further increase of the particle size. Therefore, stable fluorescent PEI-capped CdS quantum dots are available.
Y1  - 2014
U6  - https://doi.org/10.1016/j.cplett.2013.12.019
SN  - 0009-2614
SN  - 1873-4448
VL  - 592
SP  - 114
EP  - 119
PB  - Elsevier
CY  - Amsterdam
ER  -