Poly-l-lysine Functionalization of Single-Walled Carbon Nanotubes

Abstract

Single-walled carbon nanotubes (SWNTs) were covalently functionalized with biocompatible poly-L-lysine, which is useful in promoting cell adhesion. SWNTs played an important role as connectors to assemble these active amino groups of poly-L-lysine, which provided a relative "friendly" and "soft" environment for further derivation, such as attaching bioactive molecules. As an application example, by further linking peroxidase, an amplified biosensing toward H 2 O 2 concerning this assembly was investigated.

Poly(3-hydroxybutyrate)/multi-walled carbon nanotubes nanocomposites: preparation and characterizations

“…anchoring the matrix polymer on the carbon nanotubes) before using them as reinforcements for the polymer matrix. Among those methods, oxidatively generating carboxylic acid groups on the surface of the carbon nanotubes and then covalently linking oligomers or polymers with these carboxylic acid groups is an effective skill to improve the compatibility of hybrids [17][18][19][20][21][22][23][24]. Generally, the linkage of small or large molecules to the CNTs by covalent methods is more stable and effective than the noncovalent ones.…”

The effect of carbon nanotube hydrophobicity on the mechanical properties of carbon nanotube‐reinforced thermoplastic polyurethane nanocomposites

“…19 The DWNT-TDI-CH 3 sample [ Fig. 10(b)] showed a weak peak at 1617 cm À1 and a peak at 1540 cm À1 , which were assigned to the Amide I and II vibrations , respectively, in the secondary amide linkage 19,20 formed when the TDI reacted with the carboxylic acid groups on the CNT surface as shown in Figure 1. The peak at 1696 cm À1 was assigned to the urethane linkage formed when the methanol reacted with free isocyanate groups as shown in Figure 2.…”

Hybrid Nanomaterials by Surface Grafting of Synthetic Polypeptides Using N‐Carboxyanhydride (NCA) Polymerization

“…In another demonstration of utilizing polypeptides to diversify the applications of single-walled carbon nanotubes (SWNTs), poly(L-lysine) surface grafting was employed by Li and co-workers. [71] Primary amine groups on preformed PLL side chain were coupled with carboxylic groups of oxidized SWNTs by well-known carbodiimide coupling chemistry. The PLL functional SWNTs were then immobilized onto gold substrate followed by coupling of horseradish peroxide through remaining amine groups of PLL by using the same carbodiimide coupling approach to construct biosensing electrodes for H 2 O 2 .…”