@article{JelkenSanter2019,
  author    = {Jelken, Joachim and Santer, Svetlana},
  title     = {Light induced reversible structuring of photosensitive polymer films},
  series = {RSC Advances},
  volume    = {9},
  journal   = {RSC Advances},
  number    = {35},
  publisher = {RSC Publishing},
  address   = {London},
  issn      = {2046-2069},
  doi       = {10.1039/C9RA02571E},
  pages     = {20295 -- 20305},
  year      = {2019},
  abstract  = {In this paper we report on photoswitchable polymer surfaces with dynamically and reversibly fluctuating topographies. It is well known that when azobenzene containing polymer films are irradiated with optical interference patterns the film topography changes to form a surface relief grating. In the simplest case, the film shape mimics the intensity distribution and deforms into a wave like, sinusoidal manner with amplitude that may be as large as the film thickness. This process takes place in the glassy state without photo-induced softening. Here we report on an intriguing discovery regarding the formation of reliefs under special illumination conditions. We have developed a novel setup combining the optical part for creating interference patterns, an AFM for in situ acquisition of topography changes and diffraction efficiency signal measurements. In this way we demonstrate that these gratings can be "set in motion" like water waves or dunes in the desert. We achieve this by applying repetitive polarization changes to the incoming interference pattern. Such light responsive surfaces represent the prerequisite for providing practical applications ranging from conveyer or transport systems for adsorbed liquid objects and colloidal particles to generation of adaptive and dynamic optical devices.},
  language  = {en}
}
@article{SchneiderFritzschePuciulMalinowskaetal.2020,
  author    = {Schneider, Matthias and Fritzsche, Nora and Puciul-Malinowska, Agnieszka and Balis, Andrzej and Mostafa, Amr and Bald, Ilko and Zapotoczny, Szczepan and Taubert, Andreas},
  title     = {Surface etching of 3D printed poly(lactic acid) with NaOH: a systematic approach},
  series = {Polymers},
  volume    = {12},
  journal   = {Polymers},
  number    = {8},
  publisher = {MDPI},
  address   = {Basel},
  pages     = {16},
  year      = {2020},
  abstract  = {The article describes a systematic investigation of the effects of an aqueous NaOH treatment of 3D printed poly(lactic acid) (PLA) scaffolds for surface activation. The PLA surface undergoes several morphology changes and after an initial surface roughening, the surface becomes smoother again before the material dissolves. Erosion rates and surface morphologies can be controlled by the treatment. At the same time, the bulk mechanical properties of the treated materials remain unaltered. This indicates that NaOH treatment of 3D printed PLA scaffolds is a simple, yet viable strategy for surface activation without compromising the mechanical stability of PLA scaffolds.},
  language  = {en}
}
@article{SchneiderFritzschePuciulMalinowskaetal.2020,
  author    = {Schneider, Matthias and Fritzsche, Nora and Puciul-Malinowska, Agnieszka and Baliś, Andrzej and Mostafa, Amr and Bald, Ilko and Zapotoczny, Szczepan and Taubert, Andreas},
  title     = {Surface etching of 3D printed poly(lactic acid) with NaOH},
  series = {Polymers},
  volume    = {12},
  journal   = {Polymers},
  number    = {8},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {2073-4360},
  doi       = {10.3390/polym12081711},
  pages     = {16},
  year      = {2020},
  abstract  = {The article describes a systematic investigation of the effects of an aqueous NaOH treatment of 3D printed poly(lactic acid) (PLA) scaffolds for surface activation. The PLA surface undergoes several morphology changes and after an initial surface roughening, the surface becomes smoother again before the material dissolves. Erosion rates and surface morphologies can be controlled by the treatment. At the same time, the bulk mechanical properties of the treated materials remain unaltered. This indicates that NaOH treatment of 3D printed PLA scaffolds is a simple, yet viable strategy for surface activation without compromising the mechanical stability of PLA scaffolds.},
  language  = {en}
}