Nano-moles detection of tumor specific biomarker DNA for colorectal cancer detection using vertically aligned multi-wall carbon nanotubes based flexible electrodes

Chemical vapor deposition (CVD) is one of the various synthesis methods that have been employed for CNT growth. In particular, Ren et al reported that large areas of vertically aligned multi-wall carbon nanotubes could be grown using plasma enhanced chemical vapor deposition (PECVD). In the present study, we synthesized aligned CNT arrays using a direct current (dc) PECVD system. The synthesis of CNTs requires a metal catalyst layer, etchant gas, and a carbon source. In this study, the substrate consisted of Si wafers with 10, 30, and 50 nm Ni-sputtered film. Ammonia (NH3) and acetylene (C2H2) were used as the etchant gases and carbon source, respectively. NH3 pretreatment was processed using a flow rate of 180 sccm for 10 min. CNTs were grown on pretreated substrates at 30% C2H2:NH3 flow ratios for 10 min. Carbon nanotubes with diameters ranging from 60 to 80 nanometers and lengths of about 2.7 μm were obtained. Vertical alignment of the carbon nanotubes was observed by FE-SEM.

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Silver nanoparticles within vertically aligned multi-wall carbon nanotubes with open tips for antibacterial purposes

Journal of Materials Chemistry ◽

10.1039/c0jm02395g ◽

2011 ◽

Vol 21 (2) ◽

pp. 387-393 ◽

Cited By ~ 103

Author(s):

O. Akhavan ◽

M. Abdolahad ◽

Y. Abdi ◽

S. Mohajerzadeh

Keyword(s):

Carbon Nanotubes ◽

Silver Nanoparticles ◽

Multi Wall Carbon Nanotubes ◽

Vertically Aligned

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Experimental Microwave Complex Conductivity Extraction of Vertically Aligned MWCNT Bundles for Microwave Subwavelength Antenna Design

Micromachines ◽

10.3390/mi10090566 ◽

2019 ◽

Vol 10 (9) ◽

pp. 566 ◽

Cited By ~ 1

Author(s):

Charlotte Tripon-Canseliet ◽

Stephane Xavier ◽

Yifeng Fu ◽

Jean-Paul Martinaud ◽

Afshin Ziaei ◽

...

Keyword(s):

Carbon Nanotubes ◽

Silicon Substrate ◽

Electrical Impedance ◽

Antenna Design ◽

Complex Conductivity ◽

Microwave Frequencies ◽

Multi Wall Carbon Nanotubes ◽

Capacitive Behavior ◽

Resonance Shift ◽

Vertically Aligned

This paper reports the extraction of electrical impedance at microwave frequencies of vertically aligned multi-wall carbon nanotubes (VA MWCNT) bundles/forests grown on a silicon substrate. Dedicated resonating devices were designed for antenna application, operating around 10 GHz and benefiting from natural inductive/capacitive behavior or complex conductivity in the microwave domain. As obtained from S-parameters measurements, the capacitive and inductive behaviors of VA MWCNT bundles were deduced from device frequency resonance shift.

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Surface Activated Bonding between Au layer and vertically aligned Multi-Wall Carbon Nanotubes

3rd Electronics System Integration Technology Conference ESTC ◽

10.1109/estc.2010.5642937 ◽

2010 ◽

Cited By ~ 2

Author(s):

Masahisa Fujino ◽

Tadatomo Suga ◽

Ikuo Soga ◽

Daiyu Kondo ◽

Yoshikatsu Ishizuki ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multi Wall Carbon Nanotubes ◽

Vertically Aligned

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Low Temperature Synthesis of High-Density Carbon Nanotubes on Insulating Substrate

Nanomaterials ◽

10.3390/nano9030473 ◽

2019 ◽

Vol 9 (3) ◽

pp. 473 ◽

Cited By ~ 3

Author(s):

Ying Xiao ◽

Zubair Ahmed ◽

Zichao Ma ◽

Changjian Zhou ◽

Lining Zhang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Low Temperature ◽

High Surface ◽

Chemical Vapor ◽

Synthesis Temperature ◽

Catalyst Design ◽

High Density ◽

Oxide Semiconductor ◽

Multi Wall Carbon Nanotubes ◽

Vertically Aligned

A method to synthesize high-density, vertically-aligned, multi-wall carbon nanotubes (MWCNTs) on an insulating substrate at low temperature using a complementary metal–oxide–semiconductor (CMOS) compatible process is presented. Two factors are identified to be important in the carbon nanotube (CNT) growth, which are the catalyst design and the substrate material. By using a Ni–Al–Ni multilayer catalyst film and a ZrO2 substrate, vertically-aligned CNTs can be synthesized at 340 °C using plasma-enhanced chemical vapor deposition (PECVD). Both the quality and density of the CNTs can be enhanced by increasing the synthesis temperature. The function of the aluminum interlayer in reducing the activation energy of the CNT formation is studied. The nanoparticle sintering and quick accumulation of amorphous carbon covering the catalyst can prematurely stop CNT synthesis. Both effects can be suppressed by using a substrate with a high surface energy such as ZrO2.

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Terahertz emission from vertically aligned multi-wall carbon nanotubes and their composites by optical excitation

Carbon ◽

10.1016/j.carbon.2018.02.067 ◽

2018 ◽

Vol 132 ◽

pp. 335-342 ◽

Cited By ~ 6

Author(s):

Shan Huang ◽

Weilong Li ◽

Lipeng Zhu ◽

Mi He ◽

Zehan Yao ◽

...

Keyword(s):

Carbon Nanotubes ◽

Optical Excitation ◽

Terahertz Emission ◽

Multi Wall Carbon Nanotubes ◽

Vertically Aligned

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Fabrication of nanoparticles on vertically aligned multi-wall carbon nanotubes by e-beam evaporation

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2009.02.030 ◽

2010 ◽

Vol 31 (4) ◽

pp. 1684-1687 ◽

Cited By ~ 13

Author(s):

Tung-Feng Hsieh ◽

Chia-Chih Chuang ◽

Yu-Chuan Chou ◽

Chi-Min Shu

Keyword(s):

Carbon Nanotubes ◽

Multi Wall Carbon Nanotubes ◽

Vertically Aligned

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Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

MRS Proceedings ◽

10.1557/proc-772-m7.4 ◽

2003 ◽

Vol 772 ◽

Author(s):

Masakazu Muroyama ◽

Kazuto Kimura ◽

Takao Yagi ◽

Ichiro Saito

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Metal Catalyst ◽

Ni Catalyst ◽

Plasma Cvd ◽

Helicon Plasma ◽

Plasma Enhanced Cvd ◽

Turn On ◽

Aligned Carbon Nanotubes ◽

Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

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Incorporation of Multi Wall Carbon Nanotubes into Glass-Surfaces via Laser-Treatment

MRS Proceedings ◽

10.1557/proc-772-m2.8 ◽

2003 ◽

Vol 772 ◽

Cited By ~ 1

Author(s):

T. Seeger ◽

G. de la Fuente ◽

W.K. Maser ◽

A.M. Benito ◽

A. Righi ◽

...

Keyword(s):

Carbon Nanotubes ◽

Continuous Wave ◽

Silica Surface ◽

Multi Wall Carbon Nanotubes ◽

Composite Formation ◽

Multi Walled Carbon Nanotubes ◽

Glass Surfaces ◽

Walled Carbon Nanotubes ◽

First Time ◽

Scanning Electron

AbstractCarbon nanotubes (CNT) are interesting candidates for the reinforcement in robust composites and for conducting fillers in polymers due to their fascinating electronic and mechanical properties. For the first time, we report the incorporation of multi walled carbon nanotubes (MWNTs) into silica-glass surfaces by means of partial surface-melting caused by a continuous wave Nd:YAG laser. MWNTs were detected being well incorporated in the silica-surface. The composites are characterized using scanning electron microscopy (SEM) and Raman-spectroscopy. A model for the composite-formation is proposed based on heatabsorption by MWNTs and a partial melting of the silica-surface.

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