We report the bubble dragged microrocket consisting of functionalized multilayer polymer covered asymmetrically by platinum nanoparticles. The microrocket is pushed back during bubble growth over a small step and dragged forward over a big step during bubble explosion. Each bubble explosion induced a shock wave of gas which propagates in water at ultrafast speed. The bubble dragged microrocket can move along an approximate straight line instead of a fluctuating circle which is the trajectory of a bubble‐pushed microrocket in most cases, which makes it a promising candidate for drug delivery and simulating rod‐shaped bacteria.
The effect of solid dispersion (SD) formation on the solubility of phenazepam has been studied. Phenazepam and its SDs with poly(ethyleneglycol)-1500 (PEG), poly(vinylpyrrolidone)-10000 (PVP), and b-cyclodextrin were studied. The SD with PVP increases both the solubility and the dissolution rate of phenazepam. Results obtained by a complex of physical and chemical methods suggest that the improved release of phenazepam from the SD with PVP is due to solubilization, amorphization, and formation of a colloidal dispersion of the parent drug substance.
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