Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Marek Bekir"'
Publikováno v:
Molecules, Vol 26, Iss 1, p 19 (2020)
Ionic complexation of azobenzene-containing surfactants with any type of oppositely charged soft objects allows for making them photo-responsive in terms of their size, shape and surface energy. Investigation of the photo-isomerization kinetic and is
Externí odkaz:
https://doaj.org/article/53b2786c2d8e4696aa33780d3fe6c810
Autor:
Anjali Sharma, Yulia D. Gordievskaya, Nino Lomadze, Marek Bekir, Se-Hyeong Jung, Andrij Pich, Svetlana Santer
Publikováno v:
Soft Matter. 19(22):4088-4098
We report on triggering of p(NIPAM-AA) microgels’ photo-responsiveness by making complexes with a spiropyran (SP) containing surfactant. Being dissolved in water, the SP surfactant in its merocyanine state bears three charges, while irradiation wit
Publikováno v:
ACS Applied Materials & Interfaces. 15:19582-19592
Publikováno v:
Langmuir, 38(20), 6343-6351. American Chemical Society
Here we show that microgels trapped at a solid wall can issue liquid flow and transport over distances several times larger than the particle size. The microgel consists of cross-linked poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-AA) polymer
Autor:
Marek Bekir, Marcel Sperling, Daniela Vasquez Muñoz, Cevin Braksch, Alexander Böker, Nino Lomadze, Mihail N. Popescu, Svetlana Santer
Publikováno v:
Advanced Materials
Publikováno v:
ChemPhotoChem. 5:926-932
Photosensitive azobenzene-containing surfactants have attracted great attention in past years because they offer a means to control soft-matter transformations with light. At concentrations higher than the critical micelle concentration (CMC), the su
Xanthate-supported photo-iniferter (XPI)-reversible addition-fragmentation chain-transfer (RAFT) polymerization is introduced as a fast and versatile photo-polymerization strategy. Small amounts of xanthate are added to conventional RAFT polymerizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d820d0188d1abeeeff086728ec11c04a
https://doi.org/10.26434/chemrxiv-2022-3cx6g
https://doi.org/10.26434/chemrxiv-2022-3cx6g
Flow control is a highly relevant topic for micromanipulation of colloidal particles in microfluidic applications. Here, we report on a system that combines two-surface bound flows emanating from thermo-osmotic and diffusio-osmotic mechanisms. These
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::192b98d8b80287ea3c885d6754ac157c
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/56973
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/56973
Publikováno v:
Processes; Volume 11; Issue 3; Pages: 773
We report on a light-triggered process at which repulsive interactions between microparticles with a polyelectrolyte (PE) brush coating can be remotely controlled. The spherical polyelectrolyte brushes are loaded with photosensitive azobenzene contai
Autor:
Martin Reifarth, Marek Bekir, Alain M. Bapolisi, Evgenii Titov, Fabian Nußhardt, Julius Nowaczyk, Dmitry Grigoriev, Anjali Sharma, Peter Saalfrank, Svetlana Santer, Matthias Hartlieb, Alexander Böker
Publikováno v:
Angewandte Chemie International Edition. 61
A cationic surfactant containing a spiropyran unit is prepared exhibiting a dual-responsive adjustability of its surface-active characteristics. The switching mechanism of the system relies on the reversible conversion of the non-ionic spiropyran (SP