Synthesis, Stability, Cellular Uptake, and Blood Circulation Time of Carboxymethyl-Inulin Coated Magnetic Nanoparticles.

Iron oxide nanoparticles were coated with the biocompatible, biodegradable, non-immunogenic polysaccharide inulin by introduction of carboxyl groups into the inulin structure and conjugation with amine groups on the surface of iron oxide nanoparticles grafted with 3-aminopropyltriethoxysilane. The resulting nanoparticles were characterized by FT-IR spectroscopy, transmission electron microscopy, dynamic light scattering, zeta potential, SQUID magnetometry, and with respect to their energy dissipation rate in applied alternating magnetic fields. The nanoparticles had a hydrodynamic diameter in the range of 70 ± 10 nm and were superparamagnetic, with energy dissipation rates in the range of 58-175 W/g for an applied field frequency of 233 kHz and an applied field amplitude in the range of 20-48 kA/m.

Bioelectrochemical sensing based on single stranded deoxyribonucleic acid-carbon nanotubes covalently attached on gold electrodes.

A biosensor based on single-stranded deoxyribonucleic acid-functionalized carbon nanotubes covalently attached to a self-assembled monolayer of 11-amino-1-undecanethiol on gold has been prepared. The preparation of the deoxyribonucleic acid sensor was followed using cyclic voltammetry. Single-walled carbon nanotubes, covalently attached to the gold surface present a nanoelectrode array behavior.

DNA-functionalized carbon nanotubes for biosensing applications.

Carbon nanotubes (CNTs) have been broadly studied due to their exceptional structural, electronic and mechanical properties, and their use have been proposed for many applications. The number of biosensing applications of CNTs has increased in the past few years. Nevertheless, in order to use CNTs as standard materials in the biosensing field and to take full advantage of their unique properties, several problems must be solved.