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.
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