Macroscopic Three-Dimensional Arrays of Fe Nanoparticles Supported in Aligned Carbon Nanotubes

2001 ◽  
Vol 105 (48) ◽  
pp. 11937-11940 ◽  
Author(s):  
Anyuan Cao ◽  
Xianfeng Zhang ◽  
Jinquan Wei ◽  
Yanhui Li ◽  
Cailu Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Three Dimensional ◽  
Aligned Carbon Nanotubes ◽  
Fe Nanoparticles

scholarly journals Growth and structural discrimination of cortical neurons on randomly oriented and vertically aligned dense carbon nanotube networks

2014 ◽  
Vol 5 ◽  
pp. 1575-1579 ◽  
Author(s):  
Christoph Nick ◽  
Sandeep Yadav ◽  
Ravi Joshi ◽  
Christiane Thielemann ◽  
Jörg J Schneider
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Cortical Neurons ◽  
Three Dimensional ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
The Individual ◽  
Carbon Nanotube Networks ◽  
Communication Paths

The growth of cortical neurons on three dimensional structures of spatially defined (structured) randomly oriented, as well as on vertically aligned, carbon nanotubes (CNT) is studied. Cortical neurons are attracted towards both types of CNT nano-architectures. For both, neurons form clusters in close vicinity to the CNT structures whereupon the randomly oriented CNTs are more closely colonised than the CNT pillars. Neurons develop communication paths via neurites on both nanoarchitectures. These neuron cells attach preferentially on the CNT sidewalls of the vertically aligned CNT architecture instead than onto the tips of the individual CNT pillars.

scholarly journals New Three-Dimensional Porous Electrode Concept: Vertically-Aligned Carbon Nanotubes Directly Grown on Embroidered Copper Structures

Nanomaterials ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 438 ◽  
Author(s):  
Noemí Aguiló-Aguayo ◽  
Roger Amade ◽  
Shahzad Hussain ◽  
Enric Bertran ◽  
Thomas Bechtold
Keyword(s):  
Carbon Nanotubes ◽  
Porous Electrode ◽  
Three Dimensional ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

Large Field Emission from Vertically Well-aligned Carbon Nanotubes

2000 ◽  
Vol 633 ◽  
Author(s):  
Jung Inn Sohn ◽  
Seonghoon Lee ◽  
Yoon-Ho Song ◽  
Sung-Yool Choi ◽  
Kyoung-Ik Cho ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Large Field ◽  
Porous Si ◽  
Si Substrate ◽  
Field Emitter ◽  
Field Emitter Arrays ◽  
Aligned Carbon Nanotubes ◽  
Fe Nanoparticles

AbstractWe have grown well-aligned carbon nanotube arrays by thermal chemical vapor deposition at 800°C on Fe nanoparticles deposited by a pulsed laser on a porous Si substrate. Porous Si substrates were prepared by the electrochemical etching of p-Si(100) wafers with resistivities of 3 to 6 ωcm. These well-aligned carbon nanotube field emitter arrays are suitable for electron emission applications such as cold-cathode flat panel displays and vacuum microelectronic devices like microwave power amplifier tubes. Field emission characterization has been performed on the CNT-cathode diode device at room temperature and in a vacuum chamber below 10−6 Torr. The anode is maintained at a distance of 60[.proportional]m away from the carbon nanotube cathode arrays through an insulating spacer of polyvinyl film. The measured field emitting area is 4.0×10−5cm2. Our carbon nanotube field emitter arrays emit 1mA/cm2at the electric field, 2V/[.proportional]m. And they emit a large current density as high as 80mA/cm2 at 3V/[.proportional]m. The open tip structure of our carbon nanotubes and their good adhesion through Fe nanoparticles to the Si substrate are part of the reason why we can attain a large field emission current density within a low field. The field emitter arrays in our diode device are vertically well-aligned carbon nanotubes on the Si-wafer substrate.

Electron Holography of Ferromagnetic Nanoparticles Encapsulated in Three-Dimensional Arrays of Aligned Carbon Nanotubes

2006 ◽  
Vol 962 ◽  
Author(s):  
Krzysztof K. Koziol ◽  
Takeshi Kasama ◽  
Rafal E. Dunin-Borkowski ◽  
Prabeer Barpanda ◽  
Alan H. Windle
Keyword(s):  
Carbon Nanotubes ◽  
Data Storage ◽  
Three Dimensional ◽  
Magnetic Domain ◽  
Electron Holography ◽  
Ferromagnetic Nanoparticles ◽  
Micromagnetic Simulations ◽  
Magnetic Imaging ◽  
Aligned Carbon Nanotubes ◽  
Individual Particles

ABSTRACTClosely-spaced ferromagnetic nanoparticles are of interest for applications that include data storage, magnetic imaging and drug delivery. Here, we use off-axis electron holography and micromagnetic simulations to study the magnetic properties of iron nanoparticles encapsulated in three-dimensional arrays of carbon nanotubes. The nanotubes constrain the shapes, sizes and separations of the nanoparticles, as well protecting them from oxidation. We record magnetic induction maps from individual particles that each contain a single magnetic domain. We also discuss the use of electron holography to assess magnetostatic interactions between adjacent particles.

Magnetic properties of Fe nanoparticles trapped at the tips of the aligned carbon nanotubes

2001 ◽  
Vol 231 (1) ◽  
pp. 9-12 ◽  
Author(s):  
X.X Zhang ◽  
G.H Wen ◽  
Shaoming Huang ◽  
Liming Dai ◽  
Ruiping Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Properties ◽  
Aligned Carbon Nanotubes ◽  
Fe Nanoparticles
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