| Partner: N. Balabanava |
Recent publications
| 1. | Balabanava N.♦, Wierzbicki R.♦, Zielecka M.♦, Rymuza Z.♦, Effect of roughness on adhesion of polymeric coatings used for microgrippers, MICROELECTRONIC ENGINEERING, ISSN: 0167-9317, DOI: 10.1016/j.mee.2007.01.183, Vol.84, pp.1227-1230, 2007 Abstract: The purpose of the work was to examine the influence of topography and materials parameters on the value of pull-off force (adhesion) with future application of obtained results to solve the adhesion problem in microhandling. The research consists of two parts: theoretical and experimental. In theoretical research the model of contact, which takes into account the roughness of the contacted bodies is presented. In experimental part polymeric films with low surface energy were investigated as a solution to decrease adhesion at the gripping surface of the micromanipulator. To introduce surface roughness into the solution of polymers the nanoball structures (nanoparticles) were mixed. In result of these modifications three polymer samples were made: with density of nanoballs in the volume 2%, 5% and 10%. In result of these studies the dependences concerning the influence of the roughness on the adhesion were obtained. Keywords:Adhesion, Microgripper, Roughness, Polymer coatings Affiliations:
|  | |||||||||||||||
| 2. | Balabanava N.♦, Wierzbicki R.♦, Heerlein H.♦, Zielecka M.♦, Rymuza Z.♦, Low surface energy films for microgripping applications, MICROELECTRONIC ENGINEERING, ISSN: 0167-9317, DOI: 10.1016/j.mee.2006.01.061, Vol.83, pp.1389-1392, 2006 Abstract: Polymeric films with low surface energy were investigated as a solution to decrease adhesion at the gripping surface of the micromanipulator. Eight polymeric films were investigated. The polymeric films were tested by an AFM (with standard silicon cantilever in normal environmental conditions) and by a triboscope under controlled conditions with varied substrate temperature. From this number of polymers, three of them: methylsilicone resin and methylphenylsilicone – all in aromatic hydrocarbon solution, were selected to coat the grippers due to their very low roughness (35–55 nm). One of samples was selected as an example of a polymer with a catalyst. The grippers were coated by dipping the working arms (single-crystal silicon) to the solution of polymer and then dried on the heater or in the environment conditions correspondingly. Several gripping experiments were performed to test the functionality of the coatings. Different objects – algae shells (∼250 μm) and silicon parts (5–100 μm) – were manipulated with uncoated and coated grippers. Influence of the polymer coating on the stiction effect was tested. Keywords:Adhesion, Microgripping, Polymer coatings Affiliations:
| |