Fabrication of hierarchical structures with ZnO nanowires on micropillars by UV soft imprinting and hydrothermal growth for a controlled morphology and wettability

2014 ◽  
Vol 317 ◽  
pp. 545-551 ◽  
Author(s):  
Jie Hu ◽  
Yongjiao Sun ◽  
Wendong Zhang ◽  
Fanqin Gao ◽  
Pengwei Li ◽  
...  
Keyword(s):  
Hierarchical Structures ◽  
Zno Nanowires ◽  
Hydrothermal Growth ◽  
Controlled Morphology

A study of ZnO nanowires grown by electric field assisted hydrothermal growth process

2011 ◽  
Author(s):  
Jenn-Kai Tsai ◽  
Teen-Hang Meen ◽  
Yu-Sung Liu ◽  
Tian-Chiuan Wu ◽  
Tung-Lung Wu ◽  
...  
Keyword(s):  
Electric Field ◽  
Growth Process ◽  
Zno Nanowires ◽  
Hydrothermal Growth

scholarly journals ZnO Nanowires, Nanotubes, and Complex Hierarchical Structures Obtained by Electrochemical Deposition

2011 ◽  
Vol 40 (5) ◽  
pp. 728-732 ◽  
Author(s):  
Jamil Elias ◽  
Johann Michler ◽  
Laetitia Philippe ◽  
Ming-Yun Lin ◽  
Christophe Couteau ◽  
...  
Keyword(s):  
Electrochemical Deposition ◽  
Hierarchical Structures ◽  
Zno Nanowires

Effect of Hydrothermal Solutions on Optical and Electrical Properties of ZnO Nanowires Grown on a ZnO:Al Seed Layer for Improved Mechanical Performance

2020 ◽  
Vol 15 (3) ◽  
pp. 307-315
Author(s):  
H. Tugral Arslan ◽  
Cuneyt Arslan ◽  
N. Baydogan
Keyword(s):  
Seed Layer ◽  
Mechanical Performance ◽  
Sol Gel ◽  
Soda Lime ◽  
Zinc Nitrate ◽  
Zno Nanowires ◽  
Hydrothermal Growth ◽  
Optimal Size ◽  
Zno Nanowire ◽  
Seed Layers

ZnO nanowire arrays were fabricated by hydrothermal growth on Al-doped ZnO (ZnO:Al) seed layers coated on soda-lime silicate glass by sol–gel coating. The properties of the ZnO:Al seed layer were evaluated to obtain ZnO nanowires with the optimal size and length and to realize suitable adhesion of the ZnO:Al grains to the substrate. The optimal mechanical performance (adhesion and abrasion resistance) of the ZnO:Al seed layer was obtained at Al 1 at.%. The seed layers annealed between 400 and 500 C exhibited enhanced ZnO nanowire growth. Increasing the annealing temperature within this range improved the electrical and optical properties of the nanowires. Additionally, two chemical compounds, zinc acetate (ZA) and zinc nitrate (ZN), were used to compare the effects of the solution type on the hydrothermal growth. The nanowires grown in the ZA solution were thicker and had higher electrical conductivity compared to the ZN solution. The gamma transmission technique was used to determine the agglomeration of ZnO:Al nanospheres and to examine the crystallite size and density of the ZnO:Al seed layers.

scholarly journals Nanowires: Rapid, One-Step, Digital Selective Growth of ZnO Nanowires on 3D Structures Using Laser Induced Hydrothermal Growth (Adv. Funct. Mater. 26/2013)

2013 ◽  
Vol 23 (26) ◽  
pp. 3315-3315
Author(s):  
Junyeob Yeo ◽  
Sukjoon Hong ◽  
Manorotkul Wanit ◽  
Hyun Wook Kang ◽  
Daeho Lee ◽  
...  
Keyword(s):  
Zno Nanowires ◽  
Selective Growth ◽  
Hydrothermal Growth ◽  
3D Structures ◽  
One Step

Superhydrophobic Ti6Al4V surfaces with regular array patterns for anti-icing applications

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32813-32818 ◽  
Author(s):  
Yizhou Shen ◽  
Jie Tao ◽  
Haijun Tao ◽  
Shanlong Chen ◽  
Lei Pan ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Hierarchical Structures ◽  
Hydrothermal Growth ◽  
Regular Array

We present a route to fabricate a robust anti-icing superhydrophobic surface containing the hierarchical structures of microscale array patterns (built by micromachining) and nanohairs (prepared via hydrothermal growth) on a Ti6Al4V substrate.

scholarly journals Laterally Grown ZnO Nanowires for Sensing Applications

2021 ◽  
Author(s):  
◽  
Campbell Matthews
Keyword(s):  
Field Dependence ◽  
Gas Sensors ◽  
Seed Layer ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Pressure Sensors ◽  
Zno Nanowires ◽  
Hydrothermal Growth ◽  
Maximum Deviation ◽  
Sensing Applications

<p>Zinc oxide nanowires are a semiconducting material that has many uses in electronic applications. In particular, ZnO nanowires have been used in field effect transistors and applied as sensors for the detection of gases, biomolecules, UV light and as pressure sensors. ZnO nanowires can be fabricated using many different methods, but most require the use of high tempertures and have extensive setup costs. Hydrothermal growth, however, provides a cheap and low temperture method for growing ZnO nanowires. Much work has been done on the synthesis and charcetristaion of ZnO nanowires grown using hydrothermal growth, in partiuclar for photovoltaic applications. Little work has been done on the performace of hydrothermally grown ZnO nanowires in field effect transtors.  This thesis looks at applying hydrothermally grown ZnO nanowires as field effect transistors (FET). The FETs are characterised and developed with the intention of using them in senseing applications. The nanowire FET structure is optimised for sensing by developing a method that constrains the nanowires to exclusively lateral growth. A Ti capping layer is fabricated on top of a ZnO seed layer. The ZnO seed layer is then etched with dilute acid so that the Ti layer overhangs the ZnO. This acts as a physical barrier to vertical wire growth from the ZnO seed layer. The maximum deviation of the nanowires from the horizontal can be controlled by etching for different times.  Two device types are fabricated using different size nanowires. One uses large nanowires, or nanorods (diameter 400 nm), while the second device type uses a hybrid structure of large nanorods with much thinner nanowires (diameter 20 nm) growing off them. Both device types are characterised as FETs in dry conditions and also when immersed in a number of different liquids. Two different gating setups are also used with the Si/SiO₂ substrate used as a backgate and a Ag/AgCl electrode inserted into liquid as a topgate.  The large nanorods only show field dependence when wet due to the large capacitance of the elctric double layer and enhanced band bending. The wet nanorods can achieve on/off ratios of 10³. In contrast, the thinner nanowires show field dependence both when dry and when wet. On/off ratios of more than 10⁴ are achieved. In general the nanowires have superior on off ratios and smaller off current due to their larger surface to volume ratio.  Attempts are made to functionalise the nanowires with aptamers so that they can be used as a biosensor. The functionalisation procedure is documented, however the overall procedure proves to be unsuccessful due to the instability and dissolution of the nanowires in tris buffer. The rate of decay in buffer solution is investigated.  Both device types are also tested as gas sensors for humidity and ethanol detection. The nanorods show no apparent detection, while the nanowires show some response to ethanol. Further development of the experimental setup is necessary to better characterise the devices.  Finally future work on these nanowires is discussed and possible improvements proposed for future development as biosensors and gas sensors.</p>

Hydrothermal growth of large-scale micropatterned arrays of ultralong ZnO nanowires and nanobelts on zinc substrate

2006 ◽  
pp. 3551 ◽  
Author(s):  
Conghua Lu ◽  
Limin Qi ◽  
Jinhu Yang ◽  
Li Tang ◽  
Dayong Zhang ◽  
...  
Keyword(s):  
Large Scale ◽  
Zno Nanowires ◽  
Hydrothermal Growth
Sign in / Sign up

Export Citation Format

Share Document