“…De Volder et al [156] reported that the current carbon nanotube production exceeded several thousand tons annually and pegged the number close to 4.6 kiloton/year. These production capacities indicate the commercial interest in carbon nanotubes to be used in various applications including, but are not limited to, composites [157,158] as fillers, as sensors in nanomechanical applications [159,160], as biosensors [161,162] to detect biomolecules, as gas sensors [163], as nanocarriers for drugs [164], in carbohydrate conjugation [165], to manipulate genes in genetic engineering [166], as nanofillers in dental applications [104], in tracking of cells and delivering transfection agents in tissue engineering [167][168], in repair of tissue after brain damage in neurogeneration [169], in diagnostic tools for biomedical applications [170,171], as conductive improver in Lithium-ion batteries [172], in production of new composite materials by nanocoating [173], as nanoprobes in electromechanical applications [123], as actuators [174], as interconnects [175,176], and as electron sources [177].…”