30571
2013
eng
127
133
539
article
Elsevier B.V.
Amsterdam
1
--
--
--
Substrate-induced self-assembly of donor-acceptor type compounds with terminal thiocarbonyl groups
Two types of conjugated thiocarbonyl-terminated compounds have been synthesized and their ability to be adsorbed on surfaces of the different nature, namely, glass, polytetrafluoroethylene (PTFE), and gold has been studied. Different morphology of the films prepared by thermal vacuum evaporation and drop-casting from solutions has been observed depending on the surface used. It has been found that gold surface has a unique property to influence self-assembly of both monolayer and larger aggregates or crystals of the compounds, in contrast to glass and PTFE substrates. It was found that thiocarbonyl group is able to be chemisorbed to the gold surface. However, it was concluded that in spite of the fact that the thiocarbonyl groups are important for the chemical interaction with the gold surface, physical adsorption on the substrate surface, compoundcompound and compound–solvent (when using solution) interactions are of great significance to drive self-assembly of the final film.
Thin solid films
33546
10.1016/j.tsf.2013.05.084
0040-6090
16.04.2014
O.P. Dimitriev
K.P. Grytsenko
P.M. Lytvyn
T.P. Doroshenko
J.L. Briks
A.I. Tolmachev
Y.L. Slominskii
M.A. Kudinova
S. Schrader
Rolf-Dieter Schulze
Jörg Florian Friedrich
eng
uncontrolled
Thiocarbonyl group
eng
uncontrolled
Donoracceptor compound
eng
uncontrolled
Gold surface
eng
uncontrolled
Aggregation
eng
uncontrolled
Film morphology
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
47230
2019
eng
014003-1
014003-9
1 (Special issue: Upconversion Methods, Applications and Materials)
7
article
IOP
1
--
--
--
Sensitization of upconverting nanoparticles with a NIR-emissive cyanine dye using a micellar encapsulation approach
Photon upconversion nanomaterials have a wide range of applications, including biosensing and deep-tissue imaging. Their typically very weak and narrow absorption bands together with their size dependent luminescence efficiency can limit their application potential. This has been addressed by increasingly sophisticated core-shell particle architectures including the sensitization with organic dyes that strongly absorb in the near infrared (NIR). In this work, we present a simple water-dispersible micellar system that features energy transfer from the novel NIR excitable dye, 1859 SL with a high molar absorption coefficient and a moderate fluorescence quantum yield to oleate-capped NaYF4:20%Yb(III), 2%Er(III) upconversion nanoparticles (UCNP) upon 808 nm excitation. The micelles were formed using the surfactants Pluronic F-127 and Tween 80 to produce a hydrophilic dye-UCNP system. Successful energy transfer from the dye to the UCNP could be confirmed by emission measurements that revealed the occurrence of upconversion emission upon excitation at 808 nm and an enhancement of the green Er(III) emission compared to direct Er(III) excitation at 808 nm.
Methods and applications in fluorescence
10.1088/2050-6120/aafe1f
2050-6120
urn:nbn:de:kobv:b43-472300
22.01.2019
Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International
Maysoon I. Saleh
I. Panas
Florian Frenzel
Christian Würth
Bastian Rühle
Y. Slominskii
A. Demchenko
Ute Resch-Genger
eng
uncontrolled
Upconversion nanoparticles
eng
uncontrolled
Sensitization
eng
uncontrolled
NIR dyes
eng
uncontrolled
Energy transfer
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Sanitär- und Kommunaltechnik; Umwelttechnik
1 Analytische Chemie; Referenzmaterialien
1.2 Biophotonik
Umwelt
Umwelt-Material-Interaktionen
Material
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/47230/Saleh_et_al_2019_Methods_Appl._Fluoresc.pdf