Quantum nanospheres for sub-micron particle image velocimetry

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• 作者：Patrick E. Freudenthal ; Matt Pommer ; Carl D. Meinhart and Brian D. Piorek
• 刊名：Experiments in Fluids
• 出版年：2007
• 出版时间：October, 2007
• 年：2007
• 卷：43
• 期：4
• 页码：525-533
• 全文大小：358 KB

文摘

Quantum Nanospheres™ (QNs) have been developed as a new type of flow-tracing particle for micron resolution particle image velocimetry (PIV). The 70 nm diameter QNs were created by conjugating quantum dots to polystyrene beads. The fluorescent QNs have a large Stokes’ shift and are impervious to photobleaching. The use of QNs as flow-tracing particles for micro-PIV was demonstrated by measuring fluid motion in a 30 ¡Á 300 μm channel. Using an interrogation region of 1 ¡Á 1,024 pixels and ensemble averaging 1,800 image pairs, the physical volume of the interrogation region was 117 μm ¡Á 117 μm ¡Á 2 μm.