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TEM images and EDX spectra of nanohybrid. (a) TEM images of MWNT-POSS nanohybrid and (b) EDX spectra of MWNT-POSS nanohybrid.
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Figure 4: TEM images and EDX spectra of nanohybrid. (a) TEM images of MWNT-POSS nanohybrid and (b) EDX spectra of MWNT-POSS nanohybrid.

Mentions: Raman spectroscopy can be used as a powerful tool for characterizing functionalized CNTs. Figure 2b shows that the pristine MWNTs, MWNTs-alkyne, and the MWNT-POSS nanohybrid have two characteristic bands at 1352 cm-1 (D band) and 1585 cm-1 (G band) [22]. The D band is attributed to a disordered graphite structure or sp3-hybridized carbons of the nanotubes, whereas the G band corresponds to a splitting of the E2g stretching mode of graphite, which reflects the structural intensity of the sp2-hybridized carbon atoms. The increase in the band intensity ratio (ID/IG) of the functionalized MWNTs reflects the relative degree of functionalization or defects in the nanotubes, indicating covalent functionalization MWNT-POSS nanohybrids. TEM images of the MWNT-POSS nanohybrid (Figure 4a) show that MWNTs are grafted by the POSS molecules. This shows strong evidence that the POSS molecules are well coated on the surface of the MWNTs. These results are also strongly supported by the EDX with copper as a substrate (Figure 4b).

Synthesis of multi-walled carbon nanotube/polyhedral oligomeric silsesquioxane nanohybrid by utilizing click chemistry

Yadav SK, Mahapatra SS, Yoo HJ, Cho JW - Nanoscale Res Lett (2011)

Bottom Line: A new hybrid material consisting of a polyhedral oligomeric silsesquioxane (POSS) and carbon nanotube (CNT) was synthesized by a simple and versatile approach entailing click coupling between azide moiety-functionalized POSS and alkyne-functionalized multi-walled CNTs.This approach provides a simple and convenient route to efficiently functionalize a wide variety of nanoscale nanostructure materials on the surface of CNTs.

Affiliation: Department of Textile Engineering, Konkuk University, Seoul 143-701, Korea. jwcho@konkuk.ac.kr.

ABSTRACT
A new hybrid material consisting of a polyhedral oligomeric silsesquioxane (POSS) and carbon nanotube (CNT) was synthesized by a simple and versatile approach entailing click coupling between azide moiety-functionalized POSS and alkyne-functionalized multi-walled CNTs. This approach provides a simple and convenient route to efficiently functionalize a wide variety of nanoscale nanostructure materials on the surface of CNTs.

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Lister Hill National Center for Biomedical Communications
U.S. National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894
National Institutes of Health, Department of Health & Human Services
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