Quantum nanospheres for sub-micron particle image velocimetry |
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| Authors: | Patrick E. Freudenthal Matt Pommer Carl D. Meinhart Brian D. Piorek |
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| Affiliation: | (1) Nanex LLC, Santa Barbara, CA 93109, USA;(2) Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106-5070, USA;(3) Chemistry Department, University of California, Santa Barbara, CA 93106, USA |
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| Abstract: | 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 × 300 μm channel. Using an interrogation region of 1 × 1,024 pixels and ensemble averaging 1,800 image pairs, the physical volume of the interrogation region was 117 μm × 117 μm × 2 μm. |
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