Polyaniline‐Coated Fe₃O₄ Nanoparticle–Carbon‐Nanotube Composite and its Application in Electrochemical Biosensing

Carbon nanotubes/magnetite hybrids prepared by a facile synthesis process and their magnetic properties

“…With the great progress achieved in this field, CNTs have been used to synthesize not only various polymer/CNTs composites [4][5][6][7][8] but also various CNTs/metal oxide hybrids [9][10][11][12][13], where CNTs can serve as high-performance supporting materials. The decoration of CNTs with metal oxide nanoparticles can give them new properties and potentials for various applications [14][15][16][17][18]. Among them, the CNTs coated Fe 3 O 4 nanoparticles have attracted much increasing interest because of the excellent magnetic and biocompatible properties, which make them to be applied in electrochemical biosensing [19], biomanipulation [20], targeted drug delivery [21] and contaminant treatment [22].…”

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

“…The CuO/MWCNTs electrode exhibits an enhanced electrocatalytic property, lowworking potential, high sensitivity, excellent selectivity, good stability, and fast amperometric sensing towards oxidation of glucose, thus is promising for the future development of nonenzymatic glucose sensors. Glucose was also detected with CNT/Fe 3 O 4 hybrids electrochemically doped glucose oxidase reported by Liu et al [227] The PA-Fe 3 O 4 -CNTbased glucose sensor shows much higher sensitivity and linearity than the PA-Fe 3 O 4 -based sensor, indicating that CNTs significantly enhance the performances of the biosensor. A novel hydrazine electrochemical sensor based on a carbon nanotube-wired ZnO nanoflowermodified electrode was reported via a simple process (ammonia-evaporation-induced synthetic method) by Fang et al [228].…”

Carbon Nanotubes in Biomedicine and Biosensing

“…However, the direct electron transfer for oxidation of FADH 2 or reduction of FAD (Shan, Yang, Song, Han, Ivaska, & Niu, 2009) is hard to realize at conventional electrodes, because the FAD is deeply seated in a cavity and not easily accessible for conduction of electrons from the electrode surface. Thus, many CNTsbased nanohybrids, such as MWCNT/AuNPs/ionic liquid (F. Jia, Shan, Li, & Niu, 2008), SWCNT/GOD/Nafion (Lyons & Keeley, 2008), polyaniline (PANI)-coated Fe 3 O 4 nanoparticle/MWCNT (Zhun Liu, Wang, Xie, & Chen, 2008), and palladium/SWCNT (Meng, Jin, Yang, Lu, Zhang, & Cai, 2009), have been explored to immobilize GOD for glucose biosensing. More interestingly, Willner's group demonstrated that aligned reconstituted GOD on the edge of SWCNT as conductive nanoneedles can be linked to an electrode surface for fast glucose response (G. Liu & Lin, 2006).…”