Physical and anti-microbial characteristics of carbon nanoparticles prepared from lamp soot
2007 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 18, no 44Article in journal (Refereed) Published
Soot originating from the burning of butter and mustard oil in a lamp with a cotton wick was collected on a brass plate and dispersed in water and carbon tetrachloride (CCl4) as naked, and as Gum Arabic (GA, a anionic polyelectrolyte)-coated nanoparticles in water. They were physically characterized, and their anti-bacterial activities were probed on gram positive and negative bacterial colonies. TEM data revealed the presence of 35-55 nm diameter spherical carbon nanoparticles in water and CCl4. The dynamic light scattering determined the average hydrodynamic diameter for the same samples, which was found to be approximate to 100 nm ( in CCl4) and approximate to 240 nm ( in water), implying the packing of these nanoparticles into clusters. GA-coated particles yielded stable suspensions in water, but the clusters were almost the same in size (approximate to 250 nm). The zeta potential distributions of the naked and the GA-coated nanoparticles were found to be unimodal and bimodal, respectively, with both yielding mean zeta potential values nearly equal to zero. Results of energy-dispersive x-ray analysis (EDAX) confirmed the absence of toxic metallic elements inside the specimen. X-ray diffraction study confirmed the presence of amorphous as well as graphitized carbon in these nanostructures. The anti-microbial activities in terms of growth inhibition for the carbon nanoparticles against Staphylococcus aureus, ATCC 13709 ( native strain) and Klebsiella pneumonia ATCC 29655 ( native strain) were assayed in agar gel. In vitro testing revealed significant anti-microbial activity against Klebsiella pneumonia, but carbon nanoparticles were unable to kill Staphylococcus aureus.
Place, publisher, year, edition, pages
2007. Vol. 18, no 44
nanotubes, size, aggregation, delivery
IdentifiersURN: urn:nbn:se:kth:diva-17033DOI: 10.1088/0957-4484/18/44/445102ISI: 000250138500002ScopusID: 2-s2.0-36049015062OAI: oai:DiVA.org:kth-17033DiVA: diva2:335076
QC 201005252010-08-052010-08-05Bibliographically approved