Patterned growth of ZnO nanorods by micromolding of sol-gel-derived seed layer

2005 ◽  
Vol 87 (13) ◽  
pp. 133112 ◽  
Author(s):  
S. Joon Kwon ◽  
Jae-Hwan Park ◽  
Jae-Gwan Park
Keyword(s):  
Seed Layer ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Patterned Growth

Morphology Controlled Synthesis of ZnO Nanorods for Glucose Enzymatic Biosensor

2019 ◽  
Vol 290 ◽  
pp. 280-285
Author(s):  
Ridhuan Nur Syafinaz ◽  
Abdul Razak Khairunisak ◽  
Zainovia Lockman
Keyword(s):  
Seed Layer ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Process Condition ◽  
Glucose Biosensor ◽  
Electrochemical Analysis ◽  
Zinc Oxide Nanorods ◽  
Glucose Detection ◽  
Electron Conduction

The use of zinc oxide nanorods is a promising option to increase the specific area for efficient glucose oxidase immobilization which further enhance the signal performance of glucose detection. In this work ZnO nanorods were prepared via hydrothermal process on sol-gel ZnO seed layer. The effects of different temperature of annealed seed layer on the morphology and properties of grow ZnO nanorods were investigated. The ZnO seed layers were annealed at various temperatures ranging from 300 to 600 °C for 2 h. The study demonstrated that the process condition of ZnO seed layer had a strong influence on the morphology and crystallinity of ZnO nanorods grow. X-ray diffraction analysis and scanning electronic microscopy were employed to characterize the crystal structure and morphology of the prepared ZnO seed layer and grow ZnO nanorods. The performance of different aspect ratio of ZnO nanorods on glucose detection were measured by using electrochemical analysis. With optimized ZnO nanorods, the glucose biosensor exhibited an enhanced in signal performance with a high sensitivity of 11.36 μA mM-1 cm-2 in the range of 0.05-1 mM. Such high performance was due to more immobilization on the well-aligned ZnO nanorods array and direct electron conduction between the nanorods and the electrodes

scholarly journals Synthesis of Vertically Aligned ZnO Nanorods Using Sol-gel Seeding and Colloidal Lithography Patterning

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Ebrahim Chalangar ◽  
Omer Nur ◽  
Magnus Willander ◽  
Anders Gustafsson ◽  
Håkan Pettersson
Keyword(s):  
Seed Layer ◽  
Lattice Mismatch ◽  
Low Cost ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Silicon Substrates ◽  
Colloidal Lithography ◽  
High Crystalline Quality ◽  
Vertically Aligned ◽  
Cost Efficient

AbstractDifferent ZnO nanostructures can be grown using low-cost chemical bath deposition. Although this technique is cost-efficient and flexible, the final structures are usually randomly oriented and hardly controllable in terms of homogeneity and surface density. In this work, we use colloidal lithography to pattern (100) silicon substrates to fully control the nanorods' morphology and density. Moreover, a sol-gel prepared ZnO seed layer was employed to compensate for the lattice mismatch between the silicon substrate and ZnO nanorods. The results show a successful growth of vertically aligned ZnO nanorods with controllable diameter and density in the designated openings in the patterned resist mask deposited on the seed layer. Our method can be used to fabricate optimized devices where vertically ordered ZnO nanorods of high crystalline quality are crucial for the device performance.

Fabrication of ZnO Nanorods on Silicon Substrates by Sol-gel Hyrdothermal Methods

2015 ◽  
Vol 18 (2) ◽  
pp. 083-086
Author(s):  
Yow-Chyun Shyu ◽  
Min Han Lin ◽  
Shang-Ren Lin ◽  
Shang Lin Tsai ◽  
Chin Pang Chen ◽  
...  
Keyword(s):  
Seed Layer ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Silicon Substrates ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Growth Orientation ◽  
Multiple Material ◽  
Hydrothermal Methods

ZnO nanorods were deposited on silicon substrate using sol-gel hydrothermal methods. The seed layer was first grown by sol-gel methods and then annealed at temperatures of 300ºC, 400ºC, 500ºC and 600ºC. Multiple material and optical analyses including field-emission scanning electron microscope, energy dispersive X-ray spectroscopy, X-ray diffraction, photoluminescence spectra, and Raman spectra were conducted to examine the growth orientation and material properties. Results indicate that the ZnO nanorods annealed at a proper temperature of 400ºC could enhance orientation and material quality.

ZnO nanorods on ZnO seed layer derived by sol–gel process

2009 ◽  
Vol 53 (3) ◽  
pp. 605-612 ◽  
Author(s):  
Y. T. Yin ◽  
W. X. Que ◽  
C. H. Kam
Keyword(s):  
Seed Layer ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Sol Gel Process

EFFECT OF PRE-HEATING AND SEED LAYER ON HYDROTHERMAL GROWTH AND OPTICAL PROPERTIES OF ZINC OXIDE NANORODS

2011 ◽  
Vol 10 (04n05) ◽  
pp. 845-849
Author(s):  
GAURAV SHUKLA ◽  
ALIKA KHARE
Keyword(s):  
Optical Properties ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Pulsed Laser ◽  
Heating Time ◽  
Hydrothermal Growth ◽  
Zinc Oxide Nanorods ◽  
Growth Time ◽  
Oxide Nanorods ◽  
Reported Effect

Hydrothermal growth of highly c-axis oriented ZnO nanorods with high aspect ratio on pulsed laser deposited ZnO seed layer is reported. Effect of pre-heating time, growth time and seed layer on the structural, morphological and optical properties of ZnO nanorods is presented. The possible growth mechanism for ZnO nanorods is also discussed.

Fabrication of an Electrochemical Sensor for Glucose Detection using ZnO Nanorods

MRS Advances ◽  
2016 ◽  
Vol 1 (13) ◽  
pp. 861-867 ◽  
Author(s):  
Sanghamitra Mandal ◽  
Mohammed Marie ◽  
Omar Manasreh
Keyword(s):  
Response Time ◽  
Glass Substrate ◽  
Glucose Sensor ◽  
Limit Of Detection ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Coated Glass Substrate ◽  
Coated Glass

ABSTRACTAn electrochemical glucose sensor based on zinc oxide (ZnO) nanorods is fabricated, characterized and tested. The ZnO nanorods are synthesized on indium titanium oxide (ITO) coated glass substrate, using the hydrothermal sol-gel technique. The working principle of the sensor under investigation is based on the electrochemical reaction taking place between cathode and anode, in the presence of an electrolyte. A platinum plate, used as the cathode and Nafion/Glucose Oxidase/ZnO nanorods/ITO-coated glass substrate used as anode, is immersed in pH 7.0 phosphate buffer solution electrolyte to test for the presence of glucose. Several amperometric tests are performed on the fabricated sensor to determine the response time, sensitivity and limit of detection of the sensor. A fast response time less than 3 s with a high sensitivity of 1.151 mA cm-2mM-1 and low limit of detection of 0.089 mM is reported. The glucose sensor is characterized using the cyclic voltammetry method in the range from -0.8 – 0.8 V with a voltage scan rate of 100 mV/s.

Hierarchical growth of ZnO nanorods over SnO2 seed layer: insights into electronic properties from photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2112-2118 ◽  
Author(s):  
Luís F. Da Silva ◽  
Osmando F. Lopes ◽  
Ariadne C. Catto ◽  
Waldir Avansi ◽  
Maria I. B. Bernardi ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electronic Properties ◽  
Hydrothermal Treatment ◽  
Charge Separation ◽  
Seed Layer ◽  
Photocatalytic Performance ◽  
Zno Nanorods

The ZnO–SnO2 heterojunction catalyst was prepared via a hydrothermal treatment route. The heterojunction exhibited a superior photocatalytic performance in comparison to SnO2 and ZnO, attributed to the good charge separation.

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