Trench structure assisted alignment in ultralong and dense carbon nanotube arrays

2015 ◽  
Vol 3 (10) ◽  
pp. 2215-2222 ◽  
Author(s):  
Jianing An ◽  
Zhaoyao Zhan ◽  
Hari Krishna Salila Vijayalal Mohan ◽  
Gengzhi Sun ◽  
Reinack Varghese Hansen ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Trench Structure ◽  
Cnt Arrays

In situ improvement in the alignment of ultralong and dense CNT arrays has been achieved with the assistance of trench structures on flat substrates.

High-yield, in-situ fabrication and integration of horizontal carbon nanotube arrays at the wafer scale for robust ammonia sensors

Carbon ◽  
2014 ◽  
Vol 78 ◽  
pp. 326-338 ◽  
Author(s):  
Hoël Guerin ◽  
Hélène Le Poche ◽  
Roland Pohle ◽  
Laurent Syavoch Bernard ◽  
Elizabeth Buitrago ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Yield ◽  
Nanotube Arrays ◽  
Wafer Scale ◽  
In Situ Fabrication ◽  
Carbon Nanotube Arrays ◽  
Ammonia Sensors

Fe Nano-Films Processed by Ammonia for the Catalyzed Growth of Aligned Carbon Nanotube Arrays

2011 ◽  
Vol 332-334 ◽  
pp. 1967-1973
Author(s):  
Yong Zhao ◽  
Xian Chen ◽  
Shuo Hou ◽  
Zai Kai Du ◽  
Guang Yang Mo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Processing Time ◽  
Metal Vapor ◽  
Vacuum Arc ◽  
Nanotube Arrays ◽  
Processing Temperature ◽  
Analysis Software ◽  
Carbon Nanotube Arrays ◽  
Cnt Arrays ◽  
Si Wafer

Fe nano-films deposited on pure Si wafer by metal vapor vacuum arc (MEVVA) ion deposition system were annealed in hydrogen and then treated by ammonia at 750 °C for the catalyzed growth of aligned carbon nanotube (CNT) arrays. Influence of ammonia on the microstructures of Fe nano-films was analyzed by a field emission scanning electron microscopy (FESEM) and image analysis software. The microstructures of the post-processed Fe nano-films were found depending on the processing time of ammonia and the film thickness. Comparing the growth results of CNTs from 10 nm Fe films, we found that when the processing temperature was 750 °C, the optimum processing time of ammonia was about 10 to 12 min for 10 nm Fe films to catalyze the growth of aligned CNT arrays.

In situ synthesis of metal oxides in carbon nanotube arrays and mechanical properties of the resulting structures

Carbon ◽  
2012 ◽  
Vol 50 (12) ◽  
pp. 4432-4440 ◽  
Author(s):  
Jordan R. Raney ◽  
Hong-Li Zhang ◽  
Daniel E. Morse ◽  
Chiara Daraio
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Metal Oxides ◽  
In Situ Synthesis ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays

3D Printed Platforms to Facilitate Cell Culture on Carbon Nanotube Arrays

2017 ◽  
Author(s):  
Koby Kubrin ◽  
Adeel Ahmed ◽  
Shkenca Demiri ◽  
Maria Majid ◽  
Ian M. Dickerson ◽  
...  
Keyword(s):  
Cell Culture ◽  
Carbon Nanotube ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Gene Transfection ◽  
Hek293 Cells ◽  
Nanotube Arrays ◽  
Fused Deposition ◽  
Carbon Nanotube Arrays ◽  
Cnt Arrays

Template based chemical vapor deposition (CVD) is a process of effectively fabricating nanostructures such as Carbon nanotube arrays (CNT). During this process, a carbon-carrying precursor gas is used to deposit a layer of solid carbon on the surface of a template within a furnace. Template-based CVD using porous anodized aluminum oxide (AAO) membranes as the template has been applied to efficiently mass-produce CNT arrays which have shown promise for use in gene transfection applications. These AAO membranes are incredibly fragile, making them prone to cracks during handling which can compromise their performance. In order to ease handling of the CNT devices, three-dimensional (3D) printing has been applied to create a support structure for the fragile membranes. The work presented here focuses on the use of 3D printing as a means of integrating CNT arrays into nanofluidic devices, both increasing their useful application and preventing damage to the fragile arrays during handling. 3D printing allows the CNT arrays to be completely encapsulated within the fluidic device by printing a base of material before inserting the arrays. Additionally, 3D printing has been shown to create an adequate seal between the CNT arrays and the printed device without the need for additional adhesives or sealing processes. For this work, a commercially available, fused deposition modeling (FDM) 3D printer was used to print the devices out of polylactic acid (PLA) plastic. This approach has been shown to be effective and repeatable for nanofluidic device construction, while also being cost effective and less time consuming than other methods such as photolithography. Cell culture and has been demonstrated using HEK293 cells on the devices and was found to be comparable to tissue culture polystyrene.

Enhanced ion transport in densified CNT arrays

2018 ◽  
Vol 6 (18) ◽  
pp. 8763-8771 ◽  
Author(s):  
Shenglin Zhou ◽  
Jiadong Sheng ◽  
Zhaohui Yang ◽  
Xiaohua Zhang
Keyword(s):  
Carbon Nanotube ◽  
Ion Transport ◽  
Water Channels ◽  
Transport Rate ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Cnt Arrays

The formation of water channels greatly improves the overall ion transport rate through densified carbon nanotube arrays.

scholarly journals Rate-selected growth of ultrapure semiconducting carbon nanotube arrays

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhenxing Zhu ◽  
Nan Wei ◽  
Weijun Cheng ◽  
Boyuan Shen ◽  
Silei Sun ◽  
...  
Keyword(s):  
Growth Process ◽  
Electronic Devices ◽  
Decay Rates ◽  
Nanotube Arrays ◽  
High Current ◽  
Rate Analysis ◽  
Carbon Nanotube Arrays ◽  
Metallic Cnts ◽  
Cnt Arrays

Abstract Carbon nanotubes (CNTs) are promising candidates for smart electronic devices. However, it is challenging to mediate their bandgap or chirality from a vapor-liquid-solid growth process. Here, we demonstrate rate-selected semiconducting CNT arrays based on interlocking between the atomic assembly rate and bandgap of CNTs. Rate analysis confirms the Schulz-Flory distribution which leads to various decay rates as length increases in metallic and semiconducting CNTs. Quantitatively, a nearly ten-fold faster decay rate of metallic CNTs leads to a spontaneous purification of the predicted 99.9999% semiconducting CNTs at a length of 154 mm, and the longest CNT can be 650 mm through an optimized reactor. Transistors fabricated on them deliver a high current of 14 μA μm−1 with on/off ratio around 108 and mobility over 4000 cm2 V−1 s−1. Our rate-selected strategy offers more freedom to control the CNT purity in-situ and offers a robust methodology to synthesize perfectly assembled nanotubes over a long scale.

scholarly journals Synthesis of High-Quality Carbon Nanotube Arrays without the Assistance of Water

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yongfeng Luo ◽  
Xinjun Wang ◽  
Mengdong He ◽  
Xi Li ◽  
Hong Chen
Keyword(s):  
Carbon Nanotube ◽  
Carbon Source ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Nanotube Arrays ◽  
High Quality ◽  
Nanotube Array ◽  
Carbon Nanotube Arrays ◽  
Cnt Arrays ◽  
First Time

Long and high-quality carbon nanotube (CNT) arrays have been synthesized through a chemical vapor deposition process. The Fe/Al2O3on silicon was used as the catalyst, ethylene as the carbon source, and a gas mixture of Ar and H2gases as the carrying gas. It is found for the first time that the high-quality and superlong carbon nanotube array can be improved by varying the content of hydrogen and carbon source.

Controlled catalytic domain formation by mixed iron halide compounds to decrease the waviness of carbon nanotube arrays

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 84367-84371 ◽  
Author(s):  
Sook Young Moon
Keyword(s):  
Carbon Nanotube ◽  
Catalytic System ◽  
Catalytic Domain ◽  
Nanotube Arrays ◽  
Domain Formation ◽  
Two Phase ◽  
Carbon Nanotube Arrays ◽  
System P ◽  
Cnt Arrays

In this study, we present a method for controlling the waviness of carbon nanotube (CNT) arrays by adopting a two-phase catalytic system.

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