Direct label free ultrasensitive impedimetric DNA biosensor using dendrimer functionalized GaN nanowires

Anodic stripping voltammetry of silver(I) using unmodified GaN film and nanostructure electrodes

“…It possesses unique electrical properties, low toxicity and excellent chemical stability [13,14]. In particular, wurtzite gallium nitride (GaN), with its remarkable wide direct band gap energy, extremely chemical stability in harsh environment, superior optical property and convenient controlling over its carrier concentration and conductivity type, has been recognized as an attractive candidate for light-emitting diode (LED) [15][16][17], optoelectronic devices [18], DNA biosensor [19], anion and pH selective potentiometric sensor [20,21], monitoring pH in aqueous solution and certain gases at relatively high temperatures. The usage of unmodified GaN electrodes is of considerable attraction in anodic stripping voltammetry, as excellent chemical/electrochemical stability and resistance of the electrode surface provide potentially better reliability and reproducibility for analytical studies in silver metal detection than, for example, Hg electrode.…”

Nanoscale virus biosensors: state of the art

“…19,34 On the other hand, some recent studies focusing on the detection limit of NAEB reported analysis of NA at femtomolar 93,94 and attomolar levels. 95 The immobilization of the oligonucleotide probes on the surface of the electrode is a key step to fabricate the electrochemical oligonucleotide biosensor. It is not surprising that various electrodes [carbon, mercury, and gold] have been modified and tested for NA biosensing.…”

“…Electrochemical transduction during hybridization was matched with or without a redox indicator. 34,95,98 Numerous strategies have been developed to increase their sensitivity, selectivity, and speed.…”

Enhanced cell growth on nanotextured GaN surface treated by UV illumination and fibronectin adsorption

“…Recently, Ganguly et al [19] demonstrated the utility of GaN NW-based electrode for direct voltammetric detection of DNA hybridization; Sahoo et al [20] achieved ultrasensitive in situ label-free detection of DNA hybridization using poly(amidoamine)dendrimer (PAMAM) functionalized GaN NWs. Lee et al [21] found that GaN NWs were compatible with hippocampal neurons.…”