TY  - JOUR
A1  - Kasprzycka, Ewa
A1  - Assunção, Israel
A1  - Bredol, Michael
A1  - Lezhnina, Marina
A1  - Kynast, Ulrich
T1  - Preparation, characterization and optical properties of rare earth complexes with derivatives of N-phenylanthranilic acid
JF  - Journal of Luminescence
KW  - Optische Materialien
Y1  - 2021
U6  - http://dx.doi.org/10.1016/j.jlumin.2020.117818
VL  - 232
SP  - 117818
EP  - 117825
ER  - 
TY  - JOUR
A1  - Bredol, Michael
A1  - Voigt, Dominik
A1  - Gonabadi, Atoosa
T1  - A general strategy for CuInS2 based quantum dots with adjustable surface chemistry
JF  - Optical Materials
N2  - Different from negatively charged CuInS2 (CIS) based quantum dots (QDs), positively charged QDs are difficult to obtain in good optical quality, but are desirable for certain applications. We herein present a general synthesis strategy that allows for a universal surface modification of ternary CIS based QDs with thiol containing ligands.
The idea behind the synthesis design is, to apply a ZnS shell first for passivating and protecting the core QDs, and then add a second ZnS shell for the functionalization via ligand exchange. Whereby easy ligand exchange with thiolated molecules is systematically set up, by using a weak bonding amine ligand for the second shell. Molecules with various terminal groups were used to functionalize the nanoparticles and stabilize them in different media making any surface charge and polarity accessible. Surface defect chemistry seemed to play an important role in our synthesis strategy, therefore to gain a deeper understanding how these defect sites can alter the electronic structure of core/shell nanoparticles theoretical calculations based on density functional theory were performed, whilst structural, colloidal and optical properties were characterized experimentally (by dynamic light scattering, x-ray diffraction, infrared spectroscopy, zeta potential, absorption- and (time resolved) photoluminescence
measurements).
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-137346
VL  - 115
SP  - 110994
EP  - 111005
ER  - 
TY  - JOUR
A1  - Bredol, Michael
A1  - Kynast, Ulrich
A1  - DInga, Daniel K.
T1  - Novel Approach toward Water-Soluble Singlet Oxygen Monitors Based on Hybrid Inorganic−Organic Nanoclay
JF  - The Journal of Physical Chemistry C
Y1  - 2021
U6  - http://dx.doi.org/10.1021/acs.jpcc.1c04785
SN  - 1932-7447
VL  - 125
SP  - 21496
EP  - 21502
ER  -