Temperature-dependant non-catalytic growth of ultraviolet-emitting ZnO nanostructures on silicon substrate by thermal evaporation process

Dependence of photoluminescence peaks and ZnO nanowires diameter grown on silicon substrates at different temperatures and orientations

“…The size effect is expected to weaken as the sizes of the nanomaterial exceed that of the exciton Bohr radius, which is about 2 nm for ZnO [21]. One of the most important parameters to control the morphological and optical properties of ZnO nanostructures obtained using the physical vapor deposition method is the substrate temperature [22][23][24][25][26][27][28]. Thus, various amounts of substrate temperatures can lead to ZnO nanowires with different sizes.…”

Room temperature anodic deposition and shape control of one-dimensional nanostructured zinc oxide

“…However, in attaining the right dimensions and morphologies, a control synthesis procedure for the production of 1D nanoscale ZnO must be sought and optimised. Various methods such as thermal evaporation [10], hydrothermal process [11], microemulsion growth [12], chemical vapor deposition (CVD) [13], and metal-organic CVD [14] have been applied to grow 1D ZnO nanostructures. Nevertheless, most of these methods suffer from two shortcomings: firstly, they require extreme conditions and expensive equipment; and also they are not suitable for controllable synthesis.…”

Current trends in nanomaterial embedded field effect transistor-based biosensor

“…Because the volatile SiNW surface can be oxidized too easily, this ma depreciate the device's relia ilit and sensitivity (Bunimovich et al, 2006); this problem can be avoided by use of a zinc oxide nanowire (ZnO-NW). ZnO-NW have the best electrical properties and biocompatibility for biosensing (Zhao et al, 2009;Zhou et al, 2006), showing great promise because of their adjustable properties, such as semiconductor activity (band gap of 3.37 eV), bio-safety, piezoelectric capability, and bio-compatible nature (Ahsanulhaq et al, 2009;Hahn, 2011;Umar et al, 2008). ZnO-NWs can easily absorb low isoelectric point (IEP) or enzyme proteins (Chox, IEP¼ 4.9) with its extraordinary IEP (9.5).…”