Habit-modifying additives and their morphological consequences on photoluminescence and glucose sensing properties of ZnO nanostructures, grown via aqueous chemical synthesis

Optical biosensors based on ZnO nanostructures: advantages and perspectives. A review

“…Mostly nanorods (NRs) [36,38,40,43,45,47,48,53,56,74,82,86] and nanowires (NWs) [29,33,42,46,49,75,77,94] were used as a biosensor platform. Nanoparticles (NPs) [35,37,50,83,84,97,98], quantum dots [34,44], other low-dimentional structures [30,32,39,52,70,71,76,79,80,81,85,89,93,95,99] and thin films [31,51,72,73] were also applied. [57], b) SEM images of ZnO nanowires grown on sapphire (0001) substrate 2 …”

“…It is known, that ZnO has high value of isoelectric point (pH~9.1) [34,35,43,62,[66][67][68][69][74][75][76][77] which makes ZnO nanostructures attractive for immobilization of biomolecules on its surface. It is important to note that the morphology and the structure properties of ZnO play important role in the process of immobilization.…”

“…Considering the interaction of biomolecules with nanostructures "on the solid surface", the crucial role belongs to the adsorption process [6,8,57,58,[70][71][72][73][74][75][76][77]. The latter depends on the number of factors such as surface properties of the film (roughness, porosity etc), its thickness, the amount and types of surface defects and general physico-chemical compatibility of biomolecules and ZnO thin film.…”

Chemically Modified Metal Oxide Nanostructures Electrodes for Sensing and Energy Conversion

“…51,104 Then, using the drop casting process, the GOx was physically adsorbed on the ZnO nanostructures surfaces through electrostatic attraction and the samples were left to dry in a fume hood at room temperature for 3 hours. A 100 mM of glucose analyte was prepared in 10 mM PBS having a pH of 7.3 and the low concentrations of glucose were prepared in PBS by dilution.…”

“…51 It is worth to mention that, the morphology of the ZnO nanostructures is sensitive to the external conditions such as the solution pH value, the choice of the catalyst and the surfactant. It has been believed that, one or more of different parameters can influence the anisotropic shape of an inorganic nanocrystal.…”