On the alignment of ZnO nanowires by Langmuir – Blodgett technique for sensing application

The Past and the Future of Langmuir and Langmuir–Blodgett Films

“…Examples of inorganic and organic−inorganic materials are macrocyclic molecules, 260−265 dendrimers, 266,267 silica, 268−271 carbon-based particles, 272 black phosphorus, 273 clay nanosheets, 274 magnetic soft spheres, 275 gold nanoparticles, 276 CdS nanoparticles/quantum dots, 277,278 ionic liquids, 279−282 diureasil hybrid compounds, 283,284 and inorganic nanowires. 285 Since Sections 6 and 7 will cover considerable work on LB films of nontypical amphiphiles, in this section, we restrict ourselves to providing a general discussion of the challenges and opportunities in producing such Langmuir and LB films. The spreading ability is the first criterion to obtain a Langmuir monolayer, which may be difficult to achieve with nontypical amphiphiles.…”

“…The ability to fabricate highly ordered films has been explored to align ZnO nanowires in different types of gas sensors, 334 including decorating the nanowires with gold nanoparticles (AuNPs). 285 Upon depositing ZnO nanowires between electrodes 2 μm apart in LB films, it was possible to combine the quality of single nanowire devices with favorable features of multiple nanowires. 334 Gas sensing is expected to be more effective when a small number of nanowires are used since the reaction with gases tends to increase due to the larger surface area available for gas adsorption.…”

“…Nontypical amphiphiles include polymers, carbonaceous compounds (carbon nanotubes and graphene), silica, other inorganic and organic–inorganic hybrid materials. Examples of inorganic and organic–inorganic materials are macrocyclic molecules, − dendrimers, , silica, − carbon-based particles, black phosphorus, clay nanosheets, magnetic soft spheres, gold nanoparticles, CdS nanoparticles/quantum dots, , ionic liquids, − diureasil hybrid compounds, , and inorganic nanowires …”

“…The ability to fabricate highly ordered films has been explored to align ZnO nanowires in different types of gas sensors, including decorating the nanowires with gold nanoparticles (AuNPs) . Upon depositing ZnO nanowires between electrodes 2 μm apart in LB films, it was possible to combine the quality of single nanowire devices with favorable features of multiple nanowires .…”

Transparent and flexible ZnO nanorods induced by thermal dissipation annealing without polymer substrate deformation for next-generation wearable devices

“…19,20 In addition, onedimensional (1D) ZnO nanostructures such as nanorods (NRs), nanobelts, nanotubes, nanotips, and nanobers exhibit quantum mechanical connement effects and high surface-tovolume ratios and are therefore oen used for the fabrication of high-performance UV photodetectors. [21][22][23] Over the past few decades, much effort has been directed at the fabrication of transparent and exible UV photodetectors based on heterojunctions with compound semiconductors. [24][25][26] However, these techniques are time-consuming and costly, as the manufacturing process is complicated and affords lowcrystallinity ZnO, which is poorly suited for high-performance transparent and exible UV photodetectors.…”