Highly sensitive uric acid biosensor based on vertically arranged ZnO nanorods on ZnO nanoparticles seeded electrode

2021 ◽  
Author(s):  
Vandana Nagal ◽  
VIRENDRA KUMAR ◽  
Marya Khan ◽  
Suliman Alomar ◽  
Nirmalya Tripathy ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Uric Acid ◽  
Zno Nanoparticles ◽  
Zno Nanorods ◽  
Diagnosis And Treatment ◽  
Renal Disorder ◽  
Highly Sensitive ◽  
Uric Acid Biosensor

Uric acid (UA) level quantification is crucial for the diagnosis and treatment of cardiovascular, arthritis, renal disorder, and preeclampsia diseases. We report solvent-assisted synthesis of zinc oxide (ZnO) nanoparticles (NPs)...

Highly sensitive uric acid biosensor based on individual zinc oxide micro/nanowires

2013 ◽  
Vol 180 (9-10) ◽  
pp. 759-766 ◽  
Author(s):  
Yanguang Zhao ◽  
Xiaoqin Yan ◽  
Zhuo Kang ◽  
Pei Lin ◽  
Xiaofei Fang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Uric Acid ◽  
Highly Sensitive ◽  
Uric Acid Biosensor

scholarly journals The Role of ALD-ZnO Seed Layers in the Growth of ZnO Nanorods for Hydrogen Sensing

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 491 ◽  
Author(s):  
Yangming Lu ◽  
Chiafen Hsieh ◽  
Guanci Su
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Gas Sensing ◽  
Zno Nanorods ◽  
Clean Energy ◽  
Hydrogen Sensor ◽  
Zno Films ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Seed Layers

Hydrogen is one of the most important clean energy sources of the future. Because of its flammability, explosiveness, and flammability, it is important to develop a highly sensitive hydrogen sensor. Among many gas sensing materials, zinc oxide has excellent sensing properties and is therefore attracting attention. Effectively reducing the resistance of sensing materials and increasing the surface area of materials is an important issue to increase the sensitivity of gas sensing. Zinc oxide seed layers were prepared by atomic layer deposition (ALD) to facilitate the subsequent hydrothermal growth of ZnO nanorods. The nanorods are used as highly sensitive materials for sensing hydrogen due to their inherent properties as oxide semiconductors and their very high surface areas. The low resistance value of ALD-ZnO helps to transport electrons when sensing hydrogen gas and improves the sensitivity of hydrogen sensors. The large surface area of ZnO nanorods also provides lots of sites of gas adsorption which also increases the sensitivity of the hydrogen sensor. Our experimental results show that perfect crystallinity helped to reduce the electrical resistance of ALD-ZnO films. High areal nucleation density and sufficient inter-rod space were determining factors for efficient hydrogen sensing. The sensitivity increased with increasing hydrogen temperature, from 1.03 at 225 °C, to 1.32 at 380 °C after sensing 100 s in 10,000 ppm of hydrogen. We discuss in detail the properties of electrical conductivity, point defects, and crystal quality of ALD-ZnO films and their probable effects on the sensitivity of hydrogen sensing.

Aspect ratio-controlled ZnO nanorods for highly sensitive wireless ultraviolet sensor applications

2017 ◽  
Vol 5 (46) ◽  
pp. 12256-12263 ◽  
Author(s):  
Teahoon Park ◽  
Kang Eun Lee ◽  
Nari Kim ◽  
Youngseok Oh ◽  
Jung-Keun Yoo ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Aspect Ratio ◽  
Zno Nanorods ◽  
Sensor Applications ◽  
Highly Sensitive ◽  
Ultraviolet Sensor

Structurally controlled zinc oxide (ZnO) nanorods (NRs) were synthesized for ultraviolet (UV) sensing.

Fabrication of highly sensitive uric acid biosensor based on directly grown ZnO nanosheets on electrode surface

2015 ◽  
Vol 206 ◽  
pp. 146-151 ◽  
Author(s):  
Rafiq Ahmad ◽  
Nirmalya Tripathy ◽  
Na Keum Jang ◽  
Gilson Khang ◽  
Yoon-Bong Hahn
Keyword(s):  
Uric Acid ◽  
Electrode Surface ◽  
Highly Sensitive ◽  
Zno Nanosheets ◽  
Uric Acid Biosensor

scholarly journals Rapid degradation of zinc oxide nanoparticles by phosphate ions

2014 ◽  
Vol 5 ◽  
pp. 2007-2015 ◽  
Author(s):  
Rudolf Herrmann ◽  
F Javier García-García ◽  
Armin Reller
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Culture Media ◽  
Biological Effects ◽  
Reaction Medium ◽  
Oxide Nanoparticles ◽  
Phosphate Ions ◽  
Highly Sensitive ◽  
A Minor

Zinc oxide nanoparticles are highly sensitive towards phosphate ions even at pH 7. Buffer solutions and cell culture media containing phosphate ions are able to destroy ZnO nanoparticles within a time span from less than one hour to one day. The driving force of the reaction is the formation of zinc phosphate of very low solubility. The morphology of the zinc oxide particles has only a minor influence on the kinetics of this reaction. Surface properties related to different production methods and the presence and absence of labelling with a perylene fluorescent dye are more important. Particles prepared under acidic conditions are more resistant than those obtained in basic or neutral reaction medium. Surprisingly, the presence of a SiO2 coating does not impede the degradation of the ZnO core. In contrast to phosphate ions, β-glycerophosphate does not damage the ZnO nanoparticles. These findings should be taken into account when assessing the biological effects or the toxicology of zinc oxide nanoparticles.

Fabrication and characterization of a highly sensitive hydroquinone chemical sensor based on iron-doped ZnO nanorods

2015 ◽  
Vol 44 (48) ◽  
pp. 21081-21087 ◽  
Author(s):  
Ahmad Umar ◽  
Ali Al-Hajry ◽  
Rafiq Ahmad ◽  
S. G. Ansari ◽  
Mohammed Sultan Al-Assiri ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Chemical Sensor ◽  
Zno Nanorods ◽  
Screen Printed Electrode ◽  
Highly Sensitive ◽  
Iron Doped ◽  
Doped Zno ◽  
Fabrication And Characterization ◽  
Screen Printed

Herein, we report the development of a simple and highly sensitive hydroquinone (HQ) chemical sensor based on an electrochemically activated iron-doped zinc oxide nanorod modified screen-printed electrode.

Immobilization of uricase on ZnO nanorods for a reagentless uric acid biosensor

2004 ◽  
Vol 519 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Fenfen Zhang ◽  
Xiaoli Wang ◽  
Shiyun Ai ◽  
Zhengdong Sun ◽  
Qiao Wan ◽  
...  
Keyword(s):  
Uric Acid ◽  
Zno Nanorods ◽  
Uric Acid Biosensor
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