Determining the percentages of semi-conducting and metallic single-walled carbon nanotubes in bulk soot
Source abstract
Abstract
Abstract A procedure is presented to determine the percentages of metallic and semi-conducting single-walled carbon nanotubes (SWCNTs) in as-produced soot synthesized by a cobalt/molybdenum-catalyzed chemical vapor deposition (CVD) process. The procedure involves the acquisition of UV–Vis–NIR absorption spectra of solvent-suspended soot samples, and the key aspect is the use of a physically-based subtraction of the π-plasmon absorbance from the overall absorbance to ensure that the percentage of semi-conducting SWCNTs is not overstated. The improvement in accuracy using the procedure is demonstrated using two lots of soot with different amounts of non-tubular carbon (NTC) contaminants. The semi-conducting SWCNT percentage of the soot containing low NTC levels was 82 ± 3%, and this mean was overestimated by 4% when the π-plasmon absorbance was not subtracted. The semi-conducting SWCNT percentage of the soot containing higher NTC levels was 76 ± 9%, and this mean was overestimated by 6% without subtraction of the π-plasmon absorbance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Advanced Battery Technologies Research · Nanoparticles: synthesis and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (44)
Show source-provided references
1. Single- and multi-wall carbon nanotube field-effect transistors10.1063/1.122477 ↗
2. Synthesis of bandgap-controlled semiconducting single-walled carbon nanotubes10.1021/nn901135b ↗
3. Individual single-wall carbon nanotubes as quantum wires10.1038/386474a0 ↗
4. Carbon nanotube-based nonvolatile random access memory for molecular computing10.1126/science.289.5476.94 ↗
5. The nanomaterial characterization bottleneck10.1021/nn901112p ↗
6. 2008
7. Comparison of analytical techniques for purity evaluation of single-walled carbon nanotubes10.1021/ja043061w ↗
8. Characterization methods of carbon nanotubes: a review10.1016/j.mseb.2005.02.046 ↗
9. Protocol for the characterization of single-wall carbon nanotube material quality10.1016/j.carbon.2004.03.038 ↗
10. Sorting carbon nanotubes by electronic structure using density differentiation10.1038/nnano.2006.52 ↗
11. Separation of carbon nanotubes by size exclusion chromatography10.1039/a707465d ↗
12. Separation of metallic from semiconducting single-walled carbon nanotubes10.1126/science.1086534 ↗
13. Simple and scalable gel-based separation of metallic and semiconducting carbon nanotubes10.1021/nl8034866 ↗
14. Diameter-selective Raman scattering from vibrational modes in carbon nanotubes10.1126/science.275.5297.187 ↗
15. Raman characterization of single-walled nanotubes of various diameters obtained by catalytic disproportionation of CO10.1166/jnn.2003.153 ↗
16. Simplifying carbon nanotube identification
17. Quantifying carbon-nanotube species with resonance Raman scattering10.1103/PhysRevB.72.075207 ↗
18. Assignment of (n, m) Raman and optical features of metallic single-walled carbon nanotubes10.1021/nl034196n ↗
19. Using Raman spectroscopy to elucidate the aggregation state of single-walled carbon nanotubes10.1021/jp037690o ↗
20. Raman spectroscopy of individual single-walled carbon nanotubes from various sources10.1021/jp0441745 ↗
21. Thermal oxidation profiling of single-walled carbon nanotubes10.1021/cm052002u ↗
22. Optical evaluation of the metal-to-semiconductor ratio of single-wall carbon nanotubes10.1021/jp804006f ↗
23. Near-infrared (NIR) spectroscopy
24. Determination of the concentration of single-walled carbon nanotubes in aqueous dispersions using UV–visible absorption spectroscopy10.1021/ac060990s ↗
25. Purification and separation of carbon nanotubes
26. Optical absorption spectroscopy for determining carbon nanotube concentration in solution10.1016/j.synthmet.2007.06.012 ↗
27. Localized and delocalized electronic states in single-wall carbon nanotubes10.1103/PhysRevLett.80.4729 ↗
28. Purity assessment of single-wall carbon nanotubes, using optical absorption spectroscopy10.1021/jp044990c ↗
29. Determining exact molar absorbance coefficients of single-wall carbon nanotubes10.1039/b814008a ↗
30. Effects of alkyl amide solvents on the dispersion of single-wall carbon nanotubes10.1021/jp047521j ↗
31. Relationship between the structure/composition of Co–Mo catalysts and their ability to produce single-walled carbon nanotubes by CO disproportionation10.1006/jcat.2001.3383 ↗
32. A scalable process for production of single-walled carbon nanotubes (SWNTs) by catalytic disproportionation of CO on a solid catalyst10.1023/A:1020174126542 ↗
33. Characterization of single-walled carbon nanotubes (SWNTs) produced by CO disproportionation on Co–Mo catalysts10.1021/cm011613t ↗
34. Tailoring (n, m) structure of single-walled carbon nanotubes by modifying reaction conditions and the nature of the support of CoMo catalysts10.1021/jp056095e ↗
35. Electron energy-loss spectroscopy studies of single wall carbon nanotubes10.1016/S0008-6223(98)00263-2 ↗
36. Relative optical absorption of metallic and semiconducting single-walled carbon nanotubes10.1021/jp054839i ↗
37. Length separation of zwitterion-functionalized single wall carbon nanotubes by GPC10.1021/ja0172159 ↗
38. Dispersion of single-walled carbon nanotubes of narrow diameter distribution10.1021/jp052217r ↗
39. Narrow (n,m)-distribution of single-walled carbon nanotubes grown using a solid supported catalyst10.1021/ja036622c ↗
40. Dependence of optical transition energies on structure for single-walled carbon nanotubes in aqueous suspension: an empirical Kataura plot10.1021/nl034428i ↗
41. Structure-assigned optical spectra of single-walled carbon nanotubes10.1126/science.1078727 ↗
42. Single-walled carbon nanotube interactions with HeLa cells10.1186/1477-3155-5-8 ↗
43. Polarization dependence of the optical absorption of single-walled carbon nanotubes10.1103/PhysRevLett.94.087402 ↗
44. Protein-assisted solubilization of single-walled carbon nanotubes10.1021/la0528201 ↗