Dopant induced polarity inversion in polar ZnO nanorods

Rathore, N.S.; Sarkar, Shaibal K.

doi:10.1007/s10854-016-5088-y

Cited by 7 publications

(3 citation statements)

References 31 publications

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“…Finally, zinc hydroxide experiences thermal decomposition to produce zinc oxide and water [33]. As for the role of magnesium ions in the precursor solution, the hydroxide ions formed by the dissociation of ammonia form positively charged magnesium complexes with Mg 2+ , and then they are electrostatically attracted to the negatively charged top (002) face, and inhibiting ZnO growth along the preferred c axis by limiting the access of Zn complexes, thus resulting in an increase of the diameter of the NRs [34,35]. As for the MZO-1 NRs, due to the lower concentration of magnesium complexes, the increase in the diameter of the NRs is insignificant.…”

Section: Characterization Of Zno Nrs and Mzo Nrsmentioning

confidence: 99%

A flexible and ultra-highly sensitive tactile sensor based on Mg-doped ZnO nanorods for human vital signs and activity monitoring

Yao

Liu

2023

Semicond. Sci. Technol.

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Development of high-performance nano-ZnO based piezoelectric tactile sensors with outstanding sensitivity, good linearity, flexibility, durability and biocompatibility has a great significance for smart robotics, human healthcare devices, smart sensors and electronic skins. A flexible piezoelectric pressure sensor with a sandwich structure was fabricated by using PI/Cu film as top and bottom electrodes, Mg-doped ZnO nanorods (MZO NRs) as sensing layer and PDMS polymer as charge coupling layer. The MZO NRs were synthesized by a one-step hydrothermal method and their structure, morphology and defect states were characterized by using scanning electron microscopy (SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS). The piezoelectric properties of the flexible tactile sensors based on MZO NRs hydrothermally synthesized from different Mg2+/Zn2+ molar ratios were investigated comparatively by evaluating their force response actions. The results indicate that the sensors exhibit a linear response in the range of 0-1 N. The device based on MZO NRs can achieve an ultra-high sensitivity of 3.1 V/N (308.5 mV/kpa) due to higher piezoelectric coefficient of MZO NRs, which is about 5 times higher than that of the undoped ZnO NRs sensor. Moreover, the sensor shows excellent stability and durability by loading 2500 cycles of pressing. It is demonstrated that the sensor can used to accurately monitor human motion status and vital signs in real time, such as facial motion, joint movement, wrist pulse, cervical artery, and heartbeat.

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Section: Characterization Of Zno Nrs and Mzo Nrsmentioning

confidence: 99%

A flexible and ultra-highly sensitive tactile sensor based on Mg-doped ZnO nanorods for human vital signs and activity monitoring

Yao

Liu

2023

Semicond. Sci. Technol.

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“…[8][9][10][11][12][13][14][15][16][17][18] ZnO has been widely used in ultraviolet photosensors, light-emitting diodes, varistors, laser diodes, field emission devices, and optical resonators. [19][20][21][22][23][24][25][26][27][28][29][30] ZnO nanostructures can be prepared using various methods, such as vapor-liquid-solid, chemical vapor deposition, and hydrothermal method. The hydrothermal method obvious evident advantages, such as nanostructures with uniform morphology and homogeneous size, high yield, controllability, simplicity, low temperature requirement, and low cost.…”

mentioning

confidence: 99%

Improving ZnO Nanorod Humidity Sensors with Pt Nanoparticle Adsorption

Chu

Young

Ding

et al. 2021

ECS J. Solid State Sci. Technol.

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In this study, we report the successful fabrication of humidity sensors from zinc oxide (ZnO) nanorods (NRs) modified with platinum (Pt) nanoparticles (NPs) on a glass substrate through a hydrothermal method at 90 °C for 6 h. The crystal and optical properties of the pure ZnO and Pt–ZnO NRs were investigated through field-emission scanning electron microscopy (FE-SEM), X-ray diffraction analysis (XRD), photoluminescence (PL), and high-resolution transmission electron microscopy (HR-TEM). The structures of the humidity sensors demonstrated high photo-to-dark current contrast ratios, and fast response and recovery times for relative humidity (RH) measurement. The Pt NPs-adsorbed ZnO NR RH sensor showed better performance than that of the pure ZnO NR RH sensor. Results indicate that RH-sensing property can effectively be improved by adsorbed Pt NPs.

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“…[2][3][4][5][6][7][8][9][10][11][12] ZnO has been widely applied in various fields, such as DSSCs, UV photodetectors (PDs), gas sensors, light-emitting diode, varistor, laser diode, surface acoustic wave devices, optical resonator and field emission devices. [12][13][14][15][16][17][18][19][20][21][22][23] In this research, ZnO NRs were grown using a hydrothermal method with an autoclave. The DSSCs were prepared using the doctor blade method with TiO 2 nanoparticle.…”

mentioning

confidence: 99%

Self-Powered ZnO Nanorod Ultraviolet Photodetector Integrated with Dye-Sensitised Solar Cell

Young

Yuan

2019

J. Electrochem. Soc.

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In this study, ZnO nanorod ultraviolet (UV) photodetectors (PDs) with dye-sensitised solar cells (DSSCs) were prepared on ITO conductive glass. The average diameter and length of the ZnO nanorods were ∼99 nm and ∼1.6 μm, respectively. After the growth of the ZnO nanorods, the TiO 2 film with the TiO 2 nanoparticle size of ∼25 nm was coated using doctor-blade method. Then, sensitiser N 3 was used for the charge transfer in the DSSCs. The solar photovoltaic conversion efficiency of the DSSCs was approximately 4.75%. The performance of the UV PDs was also measured by exposing it with UV light at 365 nm. Results showed that the transient responses of the ZnO nanorod UV PDs integrated with DSSCs were stable and reproducible.

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Dopant induced polarity inversion in polar ZnO nanorods

Cited by 7 publications

References 31 publications

A flexible and ultra-highly sensitive tactile sensor based on Mg-doped ZnO nanorods for human vital signs and activity monitoring

A flexible and ultra-highly sensitive tactile sensor based on Mg-doped ZnO nanorods for human vital signs and activity monitoring

Improving ZnO Nanorod Humidity Sensors with Pt Nanoparticle Adsorption

Self-Powered ZnO Nanorod Ultraviolet Photodetector Integrated with Dye-Sensitised Solar Cell

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