6533b82efe1ef96bd12934a4
RESEARCH PRODUCT
On-chip purification via liquid immersion of arc-discharge synthesized multiwalled carbon nanotubes
Markus AhlskogDongkai ShaoMatti J. HokkanenSaara LautalaJuha KoivistoinenTuomas Turpeinensubject
Materials sciencepurificationamorphous carbonNanotechnology02 engineering and technologyLaboratory scale010402 general chemistryMultiwalled carbon01 natural sciencesElectric arcsymbols.namesakeparticle detachmentGeneral Materials Sciencecarbon nanotubeDebris particledetachment forceContact lineGeneral Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesAmorphous carbonChemical engineeringsymbols0210 nano-technologyRaman spectroscopymultiwalled carbon nanotubeSurface tension forcepintajännityscontact linedescription
Arc-discharge synthesized multiwalled carbon nanotubes (AD-MWNT) have been proven to be of high quality, but their use is very limited due to difficulties in obtaining them in a clean and undamaged form. Here, we present a simple method that purifies raw AD-MWNT material in laboratory scale without damage, and that in principle can be scaled up. The method consists of depositing raw AD-MWNT material on a flat substrate and immersing the substrate slowly in water, whereby the surface tension force of the liquid–substrate contact line selectively sweeps away the larger amorphous carbon debris and leaves relatively clean MWNTs on the substrate. We demonstrate the utility of the method by preparing clean individual MWNTs for measurement of their Raman spectra. The spectra exhibit the characteristics of highquality tubes free from contaminants. We also show how one concomitantly with the purification process can obtain large numbers of clean suspended MWNTs. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-07-01 |