Ultrawide ZnO nanosheets

Hydrothermal technology for nanotechnology

“…In recent years ZnO nanostructures have attracted much attention due to their exceptional properties compared with bulk materials. A variety of morphologies have been demonstrated for ZnO nanostructures such as nanoparticles [62], nanowires [63,64], nanorods [65,66], tetrapod nanowires [67,66,68], nanobelts/ribbons [64,69], film structures [70], bone-like structures [71], nanosheets [72], nanopropeller arrays [73], nanorings/helixes [74], etc. In addition to the hydrothermal technique, various other techniques have been employed to prepare ZnO nanostructures like metal organic vapour phase epitaxy, laser ablation and thermal evaporation.…”

Progress on one-dimensional zinc oxide nanomaterials based photonic devices

“…Additionally, ZnO being a biocompatible and bio-safe material makes it potentially useful for biomedical applications [17 -21] . The realization of the unique capability of ZnO to exhibit semiconducting and piezoelectric characteristics simultaneously along with the discovery of plentiful nanostructures such as; nanowires [22] , nanotubes [23] , nanobelts [24] , nanocolumns [25] , nanoneedles [26] , nanoplate [27] , nanosheets [28] , nanoribbons [29] etc., have increased the attention given to it owing to its distinct physicochemical features as well as its outstanding applications in assembling nanoscale electronic and optoelectronic devices. Recently a number of its fascinating complex nano-and micro-scale structures have also been realized, such as; cactus [30] , pods [31] and nails [32] , trees [33] , blades [34] and other countless morphologies [35 -45] etc., depicting a profuse progress in this new emerging class of nanomaterials.…”

Evolution of optical phonons in CdS nanowires, nanobelts, and nanosheets

“…3,4 Recent progress in growth techniques which control growth parameters makes possible the synthesis not only of onedimensional nanowires ͑NWs͒ but also of two-dimensional nanobelts ͑NBs͒ and nanosheets ͑NSs͒, providing even more diverse possibilities for optoelectronic applications. [5][6][7][8] The optical properties of nanostructures are influenced by size confinement, 9 strain, 7,10-12 crystallinity, 7 and excitonlongitudinal optical ͑LO͒ phonon interaction. 11,[13][14][15] For instance, the LO phonon energies of CdS NWs with diameters larger than 50 nm do not exhibit quantum confinement effects and are mostly affected by lattice contraction.…”