Abstract
A modified optical tweezers set-up has been used to generate microbubbles in flowing, biologicallyrelevant fluids and human whole blood that contains carbon nanotubes (CNTs) using low power (≤5 mW), infrared (1064 nm wavelength), continuous wave laser light. Temperature driveneffects at the tweezers’ focal point help to optically trap these microbubbles. It is observedthat proximate CNTs are driven towards the focal spot where, on encountering themicrobubble, they adhere to it. Such CNT-loaded microbubbles can be transported bothalong and against the flow of surrounding fluid, and can also be exploded to causefragmentation of the bundles. Thus, microbubbles may be used for scavenging, transportingand dispersal of potentially toxic CNTs in biologically relevant environments.
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