Optical-tweezer-induced microbubbles as scavengers of carbon nanotubes

A modified optical tweezers set-up has been used to generate microbubbles in flowing, biologically relevant fluids and human whole blood that contains carbon nanotubes (CNTs) using low power (< or =5 mW), infrared (1064 nm wavelength), continuous wave laser light. Temperature driven effects at th...

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Bibliographic Details
Published inNanotechnology Vol. 21; no. 24; p. 245102
Main Authors Ramachandran, Hema, Dharmadhikari, A K, Bambardekar, K, Basu, H, Dharmadhikari, J A, Sharma, S, Mathur, D
Format Journal Article
LanguageEnglish
Published England IOP Publishing 18.06.2010
Subjects
Adsorption
Blood - metabolism
Bundles
Carbon nanotubes
Continuous wave lasers
Fluid dynamics
Fluid flow
Fluids
Humans
Microbubbles
Microorganisms
Nanotechnology
Nanotubes, Carbon - chemistry
Optical Tweezers - therapeutic use
Scavengers
Temperature
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Summary:A modified optical tweezers set-up has been used to generate microbubbles in flowing, biologically relevant fluids and human whole blood that contains carbon nanotubes (CNTs) using low power (< or =5 mW), infrared (1064 nm wavelength), continuous wave laser light. Temperature driven effects at the tweezers' focal point help to optically trap these microbubbles. It is observed that proximate CNTs are driven towards the focal spot where, on encountering the microbubble, they adhere to it. Such CNT-loaded microbubbles can be transported both along and against the flow of surrounding fluid, and can also be exploded to cause fragmentation of the bundles. Thus, microbubbles may be used for scavenging, transporting and dispersal of potentially toxic CNTs in biologically relevant environments.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/21/24/245102