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Zno Thin Films and Nanostructures for Acoustic Wave-Based Microfluidic and Sensing Applications
Published in Jiabao Yi, Sean Li, Functional Materials and Electronics, 2018
Hua-feng pang, j. K. Luo, Y. Q. Fu
ZnO nanostructures are defined as the ZnO materials consisting of the structural elements with at least one dimension at nanoscale that ranges from 0.1 to 100 nm. The individual ZnO nanostructure refers to the QD, nanoparticle, nanowire, nanorod, nanotube, nanobelt, and nanoplatelet, whereas the collections of the ZnO nanostructures normally are shown in forms of arrays, assembly, and hierarchical nanoarchitectures based on the above individual ZnO nanostructure. Considering the dimensions at nanoscale, the ZnO nanostructures also are categorized as follows [5,66]:zero dimension (0D) nanomaterials, for example, nanoparticle, nanocluster, nanocolloids, and nanocrystals;one-dimension (1D) ones, for example, nanowire, nanorods, nanobelt, and nanotube;two-dimension (2D) ones, for example, nanoplatelet and nanodisk; andhierarchical three-dimension (3D) nanoarchitectures, for example, nanowire arrays, ordered porous structure, core-shell structure, nanoflower, and brushed shape.
Design of ZnO Nano-Architectures and Its Applications
Published in Kuan Yew Cheong, Two-Dimensional Nanostructures for Energy-Related Applications, 2017
Wai Kian Tan, Go Kawamura, Atsunori Matsuda
ZnO nanostructures in multiple dimensions have been demonstrated to exhibit unique and exceptional properties in a wide range of applications. ZnO nano-architectures designs by various methods have been widely used to increase its specific surface area for electron transport and light scattering effect as well as optimizing its optical properties. The design and formation of 2D ZnO nanostructures, its properties and application by thermal oxidation, hot-water treatment and hydrothermal as well as other related methods were discussed. The feasibility of design in ZnO nano-architectures in multiple dimensions using facile routes especially in low-temperature would be an advantage for the development of flexible energy conversion and optoelectronic devices.
ZnO Nanostructures-Based Resistive Gas Sensors: Sensing Mechanism and Sensor Response Enhancement Approaches
Published in Ankur Gupta, Mahesh Kumar, Rajeev Kumar Singh, Shantanu Bhattacharya, Gas Sensors, 2023
Synthesis of ZnO nanostructures can be achieved by popular techniques such as RF sputtering, CVD, hydrothermal, sol-gel and templet assist synthesis. By tuning the key synthesis parameters, surface morphology can be tuned. These synthesis parameters always control nucleation and growth rates, which influence morphology from thin film to nanostructures.
Adsorption of sulfathiazole drug on the platinum-decorated zinc oxide nanotubes
Published in Journal of Sulfur Chemistry, 2020
Xiaojie Su, Shehua Yang, Yuxia Song, Jing Li, Lixiao Wei, Jing Zhao
One of the most common nanostructures which has usually been exploited as a chemical sensor is zinc oxide (ZnO) because it has high chemical stability, high electron mobility, superior electrical properties, and it is non-toxic [23]. The ZnO nanostructures have been used to detect diverse chemical agents such as acetone, triethylamine, and chlorobenzene [24–26]. Also, ZnO nanostructures have a promising potential in drug delivery and bioimaging because of their good biocompatibility and low cost [27]. However, pristine ZnO nanostructures suffer from a weak interaction with various biological molecules and cannot act as an appropriate sensor. In order to overcome this problem, some approaches are accessible, including structural defect creation, doping or decorating of impurity atoms, chemical functionalization, and so on [28,29]. Among them, the decoration of noble metals on the surface of ZnO nanostructures is predicted to be the most effective process to boost the metal oxide sensitivity.
Influence of CaF2 on the preparation of ZnO via SHS method
Published in Inorganic and Nano-Metal Chemistry, 2020
Qiyu Wang, Chu Zhang, Hui Zhang, Guodong Zhang
Zinc oxide (ZnO) as one kind of important ceramic semiconductor materials has been widely used in manufacturing industries like field-effect transistors,[1,2] gas sensors[3,4] and catalysts.[5,6] It is acknowledged that ZnO with large specific surface area may find wider applications because of its better performance.[3–6] Thus ZnO with nanostructures have received great attention. A variety of methods have been applied to grow ZnO nanostructures, such as hydrothermal method, micro-emulsion method, chemical vapor deposition (CVD), physical vapor deposition (PVD) and sol-gel method.[7–11] However, all of these methods either require sophisticated experimental devices or involve complicated processes.
Characterization of sensing parameters of sulfanilamide drug by ZnO nanocage based on the quantum chemical study
Published in Journal of Sulfur Chemistry, 2021
Tianying Yang, Pengfei Luo, A. Sarkar
In addition, ZnO nanocages can be used in gas sensors because of their unique properties such as new structural configurations, surfaces with considerable single-crystallinity, and a larger area of surface-to-volume ratio. The main mechanism of these sensing systems is calculating variations in the conductivity when a gas molecule is adsorbed onto the surface of an adsorbent. The functionality of these sensing devices has been examined more and more with the latest breakthroughs in ZnO nanostructures, especially nanocages. Monitoring and sensing the level of drugs have been considered to be one of the crucial challenges to human health, especially with the increase in illnesses and the use of multiple drugs to control them [44–50]. Therefore, research into various drug sensors has received considerable attention. Metal oxide semiconductors, such as ZnO, have received considerable attention mostly because of their impressive characteristics such as low consumption of energy, excellent sensitivity, fast recovery, and quick response. In some studies, the adsorption of DNA bases onto ZnO model clusters like guanine was also investigated by carrying out physical experiments and theoretical correlation studies [51]. Also, ZnO nanostructures, such as nanowires, nanoparticles, as well as nanotubes, were investigated for application in sensors to detect various gases, includingO2, CO, F2, NO, NH3, and CH4 [11,12,52]. Also, owing to their considerable biocompatibility and cost-effectiveness, ZnO nanostructures are considered ideal to be employed in drug delivery vehicles and bioimaging. The review of recent developments in the implementation of ZnO-based nanomaterials in biomedicine has been done by Xiong et al. [53].