基于液滴反应器的图案化ZnO纳米棒阵列的合成和荧光检测性能

Synthesis and Fluorescence Biodetection Properties of Patterned ZnO Nanorod Arrays Based on Droplet Reactor

设计并制备了一种低成本的液滴反应器,通过半开放的微孔捕获液滴在衬底上合成图案化ZnO纳米材料。探究了不同液滴更新间隔时间合成的ZnO纳米棒形貌和尺寸的变化规律以及液滴蒸发过程中随着接触角的变化液滴内部流速的变化。利用扫描电子显微镜(SEM)对ZnO纳米棒的形貌进行表征。结果表明,ZnO纳米棒形貌在不同的液滴更新间隔时间下出现明显变化,当更新间隔时间为1~2min时(在液滴体积减小到20%前更新),纳米棒具有最大长径比。此外,以ZnO纳米棒为基底对羊抗牛免疫球蛋白G进行了检测,探究在不同的合成条件下制备的ZnO纳米棒阵列的荧光检测性能。结果表明,基于液滴反应器的合成方法有利于图案化ZnO纳米棒阵列的生长,为便捷、快速的高通量原位检测提供了新思路。

A low-cost droplet reactor was designed and prepared to synthesize patterned ZnO nanomaterials on a substrate by capturing droplets in semi-open microwells.The change rules of morphologies and sizes of ZnO nanorods synthesized at different droplet replenishment time and the variations of droplet internal flow velocity with change of contact angle during droplet evaporation were investigated.Morphologies of ZnO nanorods were characterized by scanning electron microscopy(SEM).The results show that the morphologies of ZnO nanorods change obviously at different droplet replenishment time.The nanorods have the maximum aspect ratio when the replenishment time is 1-2 min(replenish before the volume of the droplet decreases to 20%).Moreover,FITC-anti bovine IgG was detected with ZnO nanorods as the substrate,and the fluorescence biodetection properties of ZnO nanorod arrays prepared under different synthesis conditions were investigated.The results indicate that the synthesis method based on the droplet reactor facilitate the growth of patterned ZnO nanorod arrays,providing a new idea for convenient and rapid high-throughput in-situ detection.