Understanding DNA dispersed single-walled carbon nanotube systems
Citation:
Helen M. Cathcart, 'Understanding DNA dispersed single-walled carbon nanotube systems', [thesis], Trinity College (Dublin, Ireland). School of Physics, 2008, pp 159Download Item:
Abstract:
HiPCO Single-walled carbon nanotubes (SWNTs) have been dispersed in
water using a variety of different nucleic acids. An extensive study of the factors
controlling the quality of the DNA-SWNT dispersions was carried out, allowing one to
optimise the sample preparation technique. Numerous different factors, such as
improving the sonication process; comparing different DNA types; comparing
different DNA:SWNT ratios and the use of centrifugation to remove aggregates and
insoluble material were investigated. It was found that the best dispersions were
achieved when the samples were sonicated for 2hrs in a small round-bottom flask,
suspended centrally in an ice-water sonic bath. It was found that a ratio o f 2:1
(DNAiSWNT) gave the most reproducible samples. In addition, it was found that the
samples were improved by centrifuging at 3,300g for 1 hr after sonication to remove
any large aggregates that were not broken up during sonication.
Author: Cathcart, Helen M.
Advisor:
Coleman, JonathanQualification name:
Doctor of Philosophy (Ph.D.)Publisher:
Trinity College (Dublin, Ireland). School of PhysicsNote:
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Full text availableKeywords:
Physics, Ph.D., Ph.D. Trinity College DublinMetadata
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