Abstract
We demonstrated manipulation of micrometer-sized objects (micro-objects) by scanning light irradiation on polyethyleneglycol (PEG) thin films doped with azobenzene derivatives. 4-Ethoxy-4′-methoxyazobenzene (EMAB)-/ Disperse Red 1(DR1)-doped polyethyleneglycol films were selected as matrix. The motion of micro-objects was caused by irradiation upon UV (λ = 375 nm) and visible (λ = 488 nm) light, which suggested that the photo-responsive motion was affected by the following three factors: light intensity, the concentration of azobenzene compound in PEG, and the distance between the irradiation position and the micro-objects. Moreover, the travelling speed of micro-objects on the DR1-doped PEG film was more effective than that on the EMAB-doped PEG film under the visible light.
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