Threading carbon nanotubes through a self-assembled nanotube

Abstract

Achieving the co-assembly of more than one component represents an important challenge in the drive to create functional self-assembled nanomaterials.

Anisotropic Photoluminescence of Poly(3-hexyl thiophene) and Their Composites with Single-Walled Carbon Nanotubes Highly Separated in Metallic and Semiconducting Tubes

“…According to Figure 11 b,c, the follows changes are remarked in the Raman spectra of the two constituents of the P3HT/M + S-SWNTs and P3HT/S-SWNTs composites: (i) an up-shift of the Raman line assigned to RBM from 164 cm −1 (black curve in Figure 11 b) and 168 cm −1 (black curve in Figure 11 c) to 168 cm −1 (red curve in Figure 11 b) and 171 cm −1 (red curve in Figure 11 c); (ii) the appearance of the Raman line of P3HT at 1379–1377 cm −1 and 1445 cm −1 ; and (iii) a decrease in the intensity of the Raman lines localized in the higher frequencies spectral range 2500–3500 cm −1 . Often, the up-shift of the RBM band was invoked as an evidence for the wrapping of the SWNTs surface with the macromolecular compounds [ 34 ] or water molecules [ 35 ], when π-π* or hydrogen bonds were established between these constituents.…”

Enhanced Stability of Peptide Nanofibers Coated with a Conformal Layer of Polydopamine

“…We have previously observed that coaxial polymer-nanotube composites could be createdb ye lectrostatically binding fluorescent polyelectrolytes to the surfaceo fs elf-assembled NDI nanotubes. [10,12] The polymere mission in these composites was efficientlyq uenched throughe lectron/energy transfer between the polymer and the NDI nanotubes. The PDA coating on the NDI-KK nanofibers maintainsas urface z-potential that could be modulated by pH.…”

“…[11] However,t he polyelectrolyte coatings could be displacedb ye nvironmental factors, such as pH, ionic strength, and solvent, thereby limiting the generality of this method. [12] We reasoned that coating nanostructures with polydopamine (PDA)w ould produce robustc omposites more capableo fs ustainingc hanges of solvent, pH, or ionic strength. Polydopamine coatings on substrates are produced by the in situ, oxidative polymerization of dopamine (DA) in weaka lkaline solutions.…”

“…This wrapping process could be used to prevent nanotubes, shortened by sonication, from re‐assembling into their prior elongated states . However, the polyelectrolyte coatings could be displaced by environmental factors, such as pH, ionic strength, and solvent, thereby limiting the generality of this method . We reasoned that coating nanostructures with polydopamine (PDA) would produce robust composites more capable of sustaining changes of solvent, pH, or ionic strength.…”

Construction of spatially organized, peptide/peptide derivative containing nanocomposites

“…10). 158 The preformed NDI-bola nanotubes were segmented by sonication prior to mixing with SWNTs to reduce potential steric congestion upon entrapping carbon nanotubes. The resulting nanotube segments encapsulated SWNTs via electrostatic and cation-π interactions, meanwhile, the inherent thermodynamic propensity of supramolecular structures on self-healing [159][160][161] re-combined nanotube segments along the length of SWNTs to form the continuous coaxial coating (Fig.…”