TY  - JOUR
A1  - Loebner, Sarah
A1  - Lomadze, Nino
A1  - Kopyshev, Alexey
A1  - Koch, Markus
A1  - Guskova, Olga
A1  - Saphiannikova, Marina
A1  - Santer, Svetlana
T1  - Light-Induced Deformation of Azobenzene-Containing Colloidal Spheres
BT  - Calculation and Measurement of Opto-Mechanical Stresses
JF  - The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces & biophysical chemistry
N2  - We report on light-induced deformation of colloidal spheres consisting of azobenzene-containing polymers. The colloids of the size between 60 nm and 2 mu m in diameter were drop casted on a glass surface and irradiated with linearly polarized light. It was found that colloidal particles can be deformed up to ca. 6 times of their initial diameter. The maximum degree of deformation depends on the irradiation wavelength and intensity, as well as on colloidal particles size. On the basis of recently proposed theory by Toshchevikov et al. [J. Phys. Chem. Lett. 2017, 8, 1094], we calculated the optomechanical stresses (ca. 100 MPa) needed for such giant deformations and compared them with the experimental results.
Y1  - 2018
U6  - https://doi.org/10.1021/acs.jpcb.7b11644
SN  - 1520-6106
VL  - 122
IS  - 6
SP  - 2001
EP  - 2009
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - JOUR
A1  - Mai, Tobias
A1  - Wolski, Karol
A1  - Puciul-Malinowska, Agnieszka
A1  - Kopyshev, Alexey
A1  - Gräf, Ralph
A1  - Bruns, Michael
A1  - Zapotoczny, Szczepan
A1  - Taubert, Andreas
T1  - Anionic polymer brushes for biomimetic calcium phosphate mineralization
BT  - A surface with application potential in biomaterials
JF  - Polymers
N2  - This article describes the synthesis of anionic polymer brushes and their mineralization with calcium phosphate. The brushes are based on poly(3-sulfopropyl methacrylate potassium salt) providing a highly charged polymer brush surface. Homogeneous brushes with reproducible thicknesses are obtained via surface-initiated atom transfer radical polymerization. Mineralization with doubly concentrated simulated body fluid yields polymer/inorganic hybrid films containing AB-Type carbonated hydroxyapatite (CHAP), a material resembling the inorganic component of bone. Moreover, growth experiments using Dictyostelium discoideum amoebae demonstrate that the mineral-free and the mineral-containing polymer brushes have a good biocompatibility suggesting their use as biocompatible surfaces in implantology or related fields.
KW  - polymer brushes
KW  - calcium phosphate
KW  - hydroxyapatite
KW  - carbonated apatite
KW  - bone mimic
KW  - biocompatibility
KW  - Dictyostelium discoideum
Y1  - 2018
U6  - https://doi.org/10.3390/polym10101165
SN  - 2073-4360
VL  - 10
IS  - 10
PB  - MDPI
CY  - Basel
ER  -