科研之友
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摘要
Owing to the unique property of miniaturization and integration, microfluidic technology has been merged with many disciplines and exhibits its unique advantages in the corresponding areas. The property and performance of microfluidic system are tightly related to the property of inner surface of microchannel. As an important inorganic nanomaterial, zinc oxide is often applied to the modification of inner surface of microchannel as nanorods with low aspect ratio. However, zinc oxide nanorod only could provide limited contact area, which limits the application and performance of microfluidic system. So how to construct an efficient micro/nanostructured arrays with higher content and more contact area of zinc oxide in limited microspace via a simple method become an urgent issue to be addressed in the field of microfluidics. In this work, through microfluidic chemical method with the introduction of fluorine, a novel ZnO/Zn(OH)F nanofiber arrays was successfully constructed on inner surface of confined capillary microchannels (CMs). In the photocatalytic application, the nanofiber array-based CMs could almost photodegrade methylene blue solution (5 mg L-1) as the residence time was 40 s; based on the unique advantage of micro/nanostructure, in the application of bio-separation, the nanofiber array-based CMs could also absorb all the bovine hemoglobin (0.5 mg mL(-1)) as the residence time was 50 s and isolate human hemoglobin from human blood (500-fold diluted) effectively due to zinc-histidine coordination and large contact area. So it has been demonstrated that the ZnO/Zn(OH)F nanofiber array-based CMs would be an ideal microfluidic system for versatile applications, such as photocatalysis and proteomics.
- 出版日期2016-6-28
- 单位东华大学
