Nano-scale organic FET fabricated with carbon nanotubes

2005 ◽  
Author(s):  
Kazunaga Horiuchi
Keyword(s):  
Carbon Nanotubes ◽  
Nano Scale

Application and Characterization of Nanomaterials in Energetic Compositions

2003 ◽  
Vol 800 ◽  
Author(s):  
A. E. D. M. van der Heijden ◽  
R. H. B. Bouma ◽  
A. C. van der Steen ◽  
H. R. Fischer
Keyword(s):  
Carbon Nanotubes ◽  
Toxic Chemicals ◽  
Research Projects ◽  
Research Subjects ◽  
Nano Scale ◽  
Pyrotechnic Compositions ◽  
Energetic Compositions

ABSTRACTAs part of a cooperation between several TNO institutes, including TNO Prins Maurits Laboratory, recently a new initiative on nanotechnology was started. The research subjects within this initiative can be roughly divided into two areas: (1) Instrumentation for analysis and manufacture at nano-scale and (2) Nanoscale engineering techniques to create materials and components (including their applications). Currently the research at TNO Prins Maurits Laboratory is focusing on the application of reactive nanomaterials to decontaminate surfaces from e.g. bacteria or toxic chemicals, the use of plasma's to generate nanomaterials like carbon nanotubes, and the application and characterization of nanomaterials in energetic formulations (e.g. explosives, propellants and pyrotechnic compositions). In this paper results on the latter subject will be presented in more detail. Also results will be included of other research projects involved with energetic/reactive nanomaterials.

scholarly journals Quantum-Dot-Activated Luminescent Carbon Nanotubes via a Nano Scale Surface Functionalization forin vivo Imaging

2007 ◽  
Vol 19 (22) ◽  
pp. 4033-4037 ◽  
Author(s):  
D. Shi ◽  
Y. Guo ◽  
Z. Dong ◽  
J. Lian ◽  
W. Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dot ◽  
Surface Functionalization ◽  
Nano Scale ◽  
Scale Surface

scholarly journals Creating Low-Impedance Coatings for Neural Recording Electrodes Using Electroplating Inhibitors

2009 ◽  
Vol 3 (2) ◽  
Author(s):  
J. E. Ferguson ◽  
C. Boldt ◽  
A. D. Redish
Keyword(s):  
Carbon Nanotubes ◽  
Neural Recording ◽  
Electrode Impedance ◽  
Gold Plating ◽  
Sem Image ◽  
Nano Scale ◽  
Multi Walled Carbon Nanotubes ◽  
Plating Solution ◽  
Walled Carbon Nanotubes

Microelectrodes are routinely used for recording from ensembles of neurons for clinical and neuroscience research applications. The quality of the neural recording is highly dependant on the electrical properties of the microelectrode. Lowering the impedance of the electrode-electrolyte interface can improve the signal-to-noise ratio and the ability of the microelectrode to record from more distant neurons. Therefore, tetrodes, which are made by twisting four 12.7 μm nichrome wires together, are usually gold plated to lower impedances to 200–500 kΩ (measured at 1 kHz) before implantation. A further reduction in impedance could drastically improve recording quality but is not possible with standard gold electroplating methods without causing crossed connections (shorts) between the wires. Keefer et al. (2008, Nature Nanotechnology) reported that they could reduce electrode impedance and improve neural recordings by adding multi-walled carbon nanotubes to the gold plating solution, producing a “rice-like” texture on electrode coatings. We replicated this coating and were able to lower tetrode impedances to 120–150 kΩ without crossed connections. Furthermore, we found that by decreasing the electroplating current density and the concentration of multi-walled carbon nanotubes in the gold plating solution, we could create a 40–90 kΩ coating on each tetrode wire without any crossed connections. A scanning electron microscope (SEM) image revealed this 40–90 kΩ coating to be thick and globular with nano-scale texture, distinct from the “rice-like” coating of Keefer et al. The nano-scale texture coating had a large effective surface area likely responsible for the great reduction in impedance. In comparison, an SEM image of a standard gold-plated tetrode showed a thin coating with primarily lateral growth. The carbon nanotubes act as electroplating inhibitors by adsorbing onto the electrode surface and changing the dynamics of the gold electrocrystallization. We confirmed this by replacing the carbon nanotubes with polyethylene glycol (PEG), a known electroplating inhibitor, recreating the nano-scale texture and 40–90 kΩ tetrode impedances. By varying the concentration of electroplating inhibitors and the electroplating current, the dynamics of gold electrocrystallization can be controlled. This gives the ability to design an electrode coating with a specific shape, thickness, and texture that can be tailored to a specific application. Creating a low-impedance coating with a nano-scale texture using electroplating inhibitors can improve the recording quality of microelectrodes and can allow for the use of smaller microelectrodes that were previously limited by their high impedance. Supported by a grant from the Institute for Engineering in Medicine (U Minnesota) and training grant support from T32-EB008389. Corresponding author; email: [email protected]

scholarly journals Quantum-Dot-Activated Luminescent Carbon Nanotubes via a Nano Scale Surface Functionalization forin vivo Imaging

2008 ◽  
Vol 20 (8) ◽  
pp. NA-NA
Author(s):  
Donglu Shi ◽  
Yan Guo ◽  
Zhongyun Dong ◽  
Jie Lian ◽  
Wei Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dot ◽  
Surface Functionalization ◽  
Nano Scale ◽  
Scale Surface

Rheological Modelling of Carbon Black Aggregate Suspensions

2012 ◽  
Author(s):  
Morgane Mahaud ◽  
Anson Ma ◽  
Francisco Chinesta ◽  
Adrien Leygue ◽  
Elias Cueto
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Black ◽  
Graphitic Carbon ◽  
Thermal And Mechanical Properties ◽  
Nano Scale ◽  
Composite Fabrication ◽  
Rheological Modelling

Carbon Black (CB) and carbon nanotubes (CNTs) are both nano-scale forms of graphitic carbon (CB presents itself as nano-spheres of carbon). Both have excellent electrical, thermal and mechanical properties, what why they are often used in composite fabrication.

Mechanical Properties of Carbon Nanotubes

2002 ◽  
Author(s):  
Xuekun Sun ◽  
Youqi Wang
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Finite Element ◽  
Cell Isolation ◽  
Unit Cell ◽  
Poisson's Ratio ◽  
Finite Element Approach ◽  
Nano Scale ◽  
Element Approach ◽  
Longitudinal Modulus

Nano-scale finite element approach was used to predict the mechanical properties of carbon nanotubes. The unit-cell isolation scheme was same as that from Eric Seather [1], and nothing was assumed to exist inside any nanotube. Arm-chair, zigzag and chiral type of nanotubes with different radii were discussed in detail. The longitudinal modulus of nanotubes Ez was found to decrease with increasing nanotube radius, but to be independent of nanotube helicity. The modulus was not over 0.5 TPa for any case. Meanwhile, Poisson’s ratio νzθ was also predicted.

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