Licht-unterstützte Funktionalisierung und Anordnung hybrider Materialien auf Basis von Zeoliten
Experimentelle Physik der kondensierten Materie
Optik, Quantenoptik und Physik der Atome, Moleküle und Plasmen
Organische Molekülchemie - Synthese, Charakterisierung
Zusammenfassung der Projektergebnisse
In conclusion, we were able to demonstrate the high flexibility of such functionalization approaches. Through our method zeolite L crystals were functionalized, in such a way that arbitrary 1D, 2D and 3D microarchitectures could be assembled in combination with the use of holographic optical tweezers. This can pave the way to bottom-up construction of functional, designed nanoand microtools, based on a readily accessible library of highly functionalized zeolite-L building blocks with application in the field of microfluidic and nanophotonics. Furthermore, we have shown that these modified zeolite L crystals can be applied in the synthesis and immobilization of metal nanoparticles. Through functionalization of the zeolite surface with photoactive polymer brushes, metal nanoparticles could not only be generated through irradiation of the corresponding metal salt solution but furthermore stabilized on the surface of these decorated zeolite L crystals. These metal NP-decorated zeolites proved to be robust and highly active catalysts in a variety of chemical reactions. We are currently investigating another derivative of this functionalization method in which modified silica nanoparticles are decorated with polyacylsilane moieties on the surface. Through irradiation, different drugs can be immobilized on the surface and then be selectively released upon contact with the target cell. This pH-responsive silica acylsilane nanocarrier is currently being tested in in-vitro experiments, targeting cancer cells. In addition, optical tweezers-based mixing and sorting of solute particles could be achieved by implementing complex light fields carrying orbital angular momentum, e.g., Laguerre-Gaussian (LG) beams. The induced circular motion of particles along the annular intensity when trapped in a single LG beam leads to mixing flows. When two LG beams with different beam diameters are used inside each other, size-dependent sorting of particles is possible. Finally, new trapping geometries were achieved by integrating a KTP crystal into the optical setup, which creates a bottle beam by conical refraction. Using this in-air bottle beam, we were able to demonstrate the interaction of an ink droplet with light in free space. Such trapping geometries can pave the way to particles freely suspended in air, which are held by bottle-beam traps.
Projektbezogene Publikationen (Auswahl)
- Biolens Behavior of RBCs Under Optically-Induced Mechanical Stress, Cytometry Part A 2017, 91, 527-533
F. Merola, A. Barroso, L. Miccio, P. Memmolo, M. Mugnano, P. Ferraro, C. Denz
(Siehe online unter https://doi.org/10.1002/cyto.a.23085) - Conical refraction bottle beams for entrapment of absorbing droplets, Sci. Rep. 2017, 8, 1-8
M. Esseling, C. Alpmann, J. Schnelle, R. Meissner, C. Denz
(Siehe online unter https://doi.org/10.1038/s41598-018-23399-y) - RBCs as microlenses: wavefront analysis and applications, In Optical Methods for Inspection, Characterization, and Imaging of Biomaterials III 2017, 10333, 159-166
F. Merola, Á. Barroso, L. Miccio, P. Memmolo, M. Mugnano, P. Ferraro, C. Denz
(Siehe online unter https://doi.org/10.1117/12.2272042) - Massive ordering and alignment of cylindrical micro-objects by photovoltaic optoelectronic tweezers, Opt. Lett. 2018, 41, 30-33
I. Elvira, J. F. Muñoz-Martínez, Á. Barroso, C. Denz, J. B. Ramiro, A. García-Cabañes, F. Agulló-López, M. Carrascosa
(Siehe online unter https://doi.org/10.1364/ol.43.000030) - Optomechanically-assisted assembly of surface functionalized zeolite-L based hybrid soft matter, Part. Part. Syst. Char. 2018, 35, 180041-1-6
A. Barroso, T. Buscher, K. Ahlers, A. Studer, C. Denz
(Siehe online unter https://doi.org/10.1002/ppsc.201800041) - Polarization nano-tomography of tightly focused light landscapes by self-assembled monolayers, Nat. Commun. 2019, 10, 1-10
E. Otte, K. Tekce, S. Lamping, B. J. Ravoo, C. Den
(Siehe online unter https://doi.org/10.1038/s41467-019-12127-3) - Optical trapping gets structure: Structured light for advanced optical manipulation, Appl. Phys. Rev. 2020, 7, 041308
E. Otte, C. Denz
(Siehe online unter https://doi.org/10.1063/5.0013276) - Synthesis and Immobilization of Metal Nanoparticles Using Photoactive Polymer-Decorated Zeolite L Crystals and Their Application in Catalysis, Adv. Synth. Catal. 2020, 362, 2245
M. Wissing, M. Niehues, B.J. Ravoo, A. Studer
(Siehe online unter https://doi.org/10.1002/adsc.202000208) - Optical grinder: sorting of trapped particles by orbital angular momentum, Opt. Exp. 2021, 29.9, 12967-12975
V. Bobkova, J. Stegemann, R. Droop, E. Otte, C. Denz
(Siehe online unter https://doi.org/10.1364/oe.419876) - Particle-like topologies in light, Nat. Commun. 2021, 12.1, 1-10
D. Sugic, R. Droop, E. Otte, D. Ehrmanntraut, F. Nori, J. Roustekoski, C. Denz, M. Dennis
(Siehe online unter https://doi.org/10.1038/s41467-021-26171-5)
