The large response current of a vacuum pressure sensor based on a vertically-aligned ZnO nanowires array

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114566-114571 ◽  
Author(s):  
Ding Wang ◽  
Xuejun Zheng ◽  
Xinchao Cao ◽  
Xianying Wang ◽  
Tong Zhang
Keyword(s):  
Pressure Sensor ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Zno Nanowires ◽  
Vacuum Pressure ◽  
Vertically Aligned ◽  
Sensitive Characteristics ◽  
Response Current ◽  
Nanowires Array ◽  
Large Response

A vertically-aligned ZnO nanowires (VA-ZnO-NWs) array was prepared via chemical vapor deposition, which was used to fabricate a vacuum pressure sensor and its sensitive characteristics were measured using a semiconductor parameter tester.

Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
Myung Gwan Hahm ◽  
Young-Kyun Kwon ◽  
Ahmed Busnaina ◽  
Yung Joon Jung
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Controlled Synthesis ◽  
Full Potential ◽  
Thermal Chemical Vapor Deposition ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lack of understanding of the fundamental growth mechanism of CNTs, as well as the difficulty of controlling atomic-scale physical and chemical reactions during the nanotube growth process. Especially, controlling the number of graphene wall, diameter, and chirality of CNTs are the most important issues that need to be solved to harness the full potential of CNTs. Here we report the large-scale selective synthesis of vertically aligned single walled carbon nanotubes (SWNTs) and double walled carbon nanotubes (DWNTs) by controlling the size of catalyst nanoparticles in the highly effective oxygen assisted thermal chemical vapor deposition (CVD) process. We also demonstrate a simple but powerful strategy for synthesizing ultrahigh density and diameter selected vertically aligned SWNTs through the precise control of carbon flow during a thermal CVD process.

Vertically aligned growth of small-diameter single-walled carbon nanotubes on flexible stainless steels by alcohol catalytic chemical vapor deposition with Ir catalyst on alumina buffer layer

2021 ◽  
Author(s):  
Shu KONDO ◽  
Daiki YAMAMOTO ◽  
Kamal Prasad Prasad Sharma ◽  
Yazid Yaakob ◽  
Takahiro SAIDA ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Buffer Layer ◽  
Vapor Deposition ◽  
Small Diameter ◽  
Chemical Vapor ◽  
Cost Effective ◽  
Chemical Vapor Deposition Growth ◽  
Catalytic Chemical Vapor Deposition ◽  
Single Walled Carbon ◽  
Vertically Aligned

Abstract We performed single-walled carbon nanotube (SWCNT) growth on flexible stainless-steel foils by applying alcohol catalytic chemical vapor deposition using an Ir catalyst with an alumina buffer layer. When the alumina thickness was 90 nm, vertically aligned SWCNTs with a thickness of 4.6 m were grown. In addition, Raman results showed that the diameters of most SWCNTs were distributed below 1.1 nm. Compared with conventional chemical vapor deposition growth where Si wafers are used as substrates, this method is more cost effective and easier to extend for mass production of small-diameter SWCNTs.

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