Perspective—Doped ZnO Nanostructures Based on Ultraviolet Photosensors

Abstract

In the past decades, a variety of morphologies and doping zinc oxide (ZnO) nanomaterials have attracted significant attention due to their outstanding properties for photodetectors (PDs). This perspective provides the state of recent advancements regarding the doping of ZnO-based PDs and discusses future directions of ZnO-based optoelectronic devices in order to provide a useful reference for those who are interested in PDs.

Anticipating Challenges in Optical Nanobiosensors for Global Detection of Respiratory Viruses and Emerging Threats

“…This is the enormous challenge of achieving high efficiencies that can be accomplished by improving available or emergent materials (lowcost composites or unexplored nanoplatforms) and examining their nanoscale interaction with biomolecules. For example, using versatile, practical, and low-cost semiconductor materials such as ZnO 68 offers diverse exploitable fabrication properties for electrochemical 69 or optical biosensors, 70 as reviewed in our previous works. 71 In addition, the reversible tuning of ZnO nanowires' photoluminescence from green to blue offers properties like high surface-to-volume ratio and sensitivity to environmental changes for the improvement of optical biosensing platforms, as demonstrated by Galdamez et al, which could be aimed at detecting airborne diseases.…”

Hydrothermally Synthesized ZnSnO3 Nanoflakes Based Low-Cost Sensing Device for High Performance CO2 Monitoring

“…13,14 The chemi-resistive sensors are developed by numerous nanostructured materials including metal oxide semiconductor (MOS), graphene, conducting polymers, carbon nanotubes, and metal-organic frameworks. [15][16][17][18][19] In comparison to MOS, other nanostructures such as carbon nanotubes are relatively expensive and have poor selectivity. 20,21 Graphene-based CO 2 gas sensors are prone to conglomeration between layers, have a low yield, and have high prices.…”

Highly Sensitive Isopropanol Gas Sensor based on SnO2 Nano-Flowers on Gold, Silver, and Aluminum Interdigitated Electrodes

“…Thanks to the advancement of nanotechnology, sensitive sensors can be suitable choices for this purpose. [12][13][14][15][16] Among the types of gas sensors, those based on semiconductors (semiconductor nanostructures) are a suitable choice for the detection of VOCs due to their large surface area, robustness against environmental vibrations, and availability. 4,[17][18][19] SnO 2 is a metal oxide semiconductor (MOS) with a high direct bandgap energy of 3.6 eV.…”