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Topic: Nanotubule

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In the News (Fri 20 Apr 18)

  Engineering of Nanostructures from Carbon Nanotubules
The carbon nanotubule used for the indentation simulation is of type (10,10) and consists of 20 unit cells, terminated with 10 hydrogen atoms at each end for a total of 820 atoms in the tip.
The top 100 atoms of the carbon nanotubule (furthest from the surface) and the 1480 atoms at the base of the substrate (furthest from the tip) are held rigid throughout the simulation.
In a second simulation, the indentation was continued until the nanotubule deformed plastically through a buckling mechanism, thus reducing the load on the tip (Figure 2).
www.foresight.org /Conferences/MNT05/Papers/Sinnott/index.html   (2483 words)

Nanotubules of inorganic materials such as silica or titania can be prepared through sol-gel chemistry, and carbon nanotubules can be made through chemical vapor deposition.
The nanotubules come out embedded in a membrane, aligned, and monodisperse--that is, of uniform diameter and of a uniform length equal to the thickness of the membrane.
With cysteine anchored to the nanotubule walls, Martin begins to bridge the gap between nonbiological and biological agents that modify transport across the nanotubule membrane.
pubs.acs.org /cen/coverstory/7924/7924nanotubules.html   (2529 words)

 Daemon Re-Enforced Armour System
The armour consists of the Carbon Nanotubule shell and the Carbon Fibre hull re-enforcement.
The powerful carbon nanotubule shell is the key to this armour system.
This not only makes the nanotubule mesh less vulnerable, but protects lower layers of the hull as they are heated more evenly.
operationphoenix.freeservers.com /armourtech.html   (655 words)

 Mechanism of carbon nanotubule formation   (Site not responding. Last check: 2007-10-26)
A new way to form carbon nanotubules, where polyyne-containing carbon is heated and irradiated by an electron beam in TEM, was developed.
A time-series of photographs of carbon nanotubule growth were taken by a TEM with this technique.
The whole outline of the carbon nanotubule is assumed to be formed at this step.
fondazione-elba.org /65.htm   (293 words)

 De Novo-designed Peptide Transforms Golgi-specific Lipids into Golgi-like Nanotubules -- Lee et al. 276 (44): 41224 -- ...
Golgi-like Nanotubules Are Induced by Hel 13-5-- When Hel 13-5 was added to PC liposomes, the liposomes were transformed from spherical structures into twisted ribbon-like
Nanotubule Formation Occurs in Solution-- Electron microscopy requires the use of an adsorbed or fixed sample.
Nanotubule Formation Depends on Peptide Chain Length and Hydrophobicity-- We investigated the relationship between the peptide sequence and the fibril structure formation.
www.jbc.org /cgi/content/full/276/44/41224   (3220 words)

Nanotubule membranes prepared via the template method are of particular interest.
We are exploring applications of these nanotubule membranes in chemical analysis and in membrane-based chemical separations.
We have also shown that these nanotubule membranes can form the basis of a new method of electrochemical analysis that has detection limits as low as 10-11 M. In both the applications to chemical analysis and chemical separations, it is important to introduce chemical selectivity into the nanotubule membrane.
www.phys.ufl.edu /~teresa/nano/martin.html   (413 words)

 Interfacial Engineering Group   (Site not responding. Last check: 2007-10-26)
To improve the chiral selectivity of the membrane-based enantioseparation, we propose to develop nanotubule membrane with proper proteins immobilized on; the membrane will be made into cartridges and placed in a High Performance Liquid Chromatography (HPLC) for testing and operation.
Nanotubule membranes can have a controlled pore size on the order of nanometers and hence offer excellent steric exclusivity for various chemicals.
Combining the chiral selectivity of proteins and the steric exclusivity of nanotubules, the proposed protein immobilized nanotubule membranes are expected to provide high enantioselectivity.
pchenlab3.uwaterloo.ca /research1.htm   (1700 words)

 Carbon nanotubule formation through polyyne-containing carbon   (Site not responding. Last check: 2007-10-26)
The cross-section of the film (100 nm thick), which was embedded in an epoxy resin, was heated (800C) and irradiated with electrons (accelerating voltage: 100 kV) in a transmission electron microscope.
The obtained nanotubules were a few mm in length, 10 - 50 nm in outer diameter.
This result suggests that the polyyne-containing carbon can be a precursor to form the carbon nanotubules.
fondazione-elba.org /05.htm   (238 words)

 Introducing Chemical Transport Selectivity into Gold Nanotubule Membranes
The rate and selectivity of transport in these membranes is dramatically altered by the chemical identity of the R group.
However, the decrease in the measured d value after incorporation of the thiol is not as dramatic as might be expected on the basis of the length of the thiol.
We begin by comparing fluxes of the permeant molecule pyridine in untreated and thiol-treated nanotubule membranes.
pubs.acs.org /cgi-bin/abstract.cgi/jacsat/1998/120/i26/abs/ja980045o.html   (1486 words)

 Molecular Dynamics Simulations of Carbon Nanotubule Bending and the affect on Electrical Properties
There will be a link from here to the full article when it is available on the web.
One potential application of the carbon nanotubule is in nanoscale mechanical sensors, e.g.
Since the discovery of carbon-based nanotubules by Iijima, many theoretical and experimental studies of the electronic and mechanical properties of tubules have been conducted.
www.foresight.org /Conferences/MNT05/Abstracts/Shalabst.html   (342 words)

Fullerene Nanotubules: Chiral One-Dimensional Electron System, EPS 10 Trends in Physics, 10th General Conference of the European Physical Society, Sevilla, Spain, 1996, p.
Motion of the Conduction Electrons in Carbon Nanotubule under the Action of AC Electric and DC Magnetic Fields, 9th Int.
Magnetoelectronics and Optics of Chiral Fullerenic Nanotubules, 2nd International Conference on the Physics of Low-Dimensional Structures, Dubna, Russia, 1995, p.
astro.temple.edu /~daroman/publications.html   (1665 words)

Nishizawa, M.; Menon, V. P.; Martin, C. “Metal Nanotubule Membranes with Electrochemically Switchable Ion-Transport Selectivity,” Science, 1995, 268, 700-702.
Jirage, K.B.; Martin, C.R. “Molecular Filtration in Nanotubule Membranes: Sorting Molecules on the Basis of Size and Chemistry,” Biological Molecules in Nanotechnology, (IBC) 1998, Chapter 12, pp.
Hulteen, J. C.; Chen, H.X.; Chambliss; Martin, C. "Template Synthesis of Carbon Nanotubule and Nanofiber Arrays,” Nanostructured Mater., 1997, 9, 133-136.
www.chem.ufl.edu /~crmartin/publications.htm   (5840 words)

 NANOTECHNOLOGY, videotapes audiotapes publications and more
Track 1 : 5th Foresight Conference on Molecular Nanotechnology, Friday, Nov. 7, 1997.
Engineering of Nanometer-Scale Structures from Carbon Nanotubules and Molecular Dynamics Simulations of Carbon Nanotubule Bending and the affect on Electrical Properties and Fullerene Based SPM Tips
Track 1 : 5th Foresight Conference on Molecular Nanotechnology, Saturday, Nov. 8, 1997.
sound.photosynthesis.com /Nanotechnology.html   (1773 words)

 The Triple Helix
Researchers at the University of Texas’s Nanotech Institute have built artificial muscles that are capable of overcoming that constraint by acting as both a fuel source and an actuator.
The group’s first design involves a catalyst-covered carbon nanotubule that simultaneously serves as a fuel cell electrode, a supercapacitor electrode, and as a muscle [1].
The artificial muscle, like a biological one, converts chemical energy into electrical energy, which it can then either store or transform into mechanical energy to use for movement [1,2].
www.thetriplehelix.org /news/496   (371 words)

 [No title]
Surface resistance of carbon nanotubule coat has <5% resistance variation by 4 pt probe.
Has partnership with Brewer science to make the CMOS grade nanotubule solution for use in NRAM ASIC type devices.
At this time there’s no way to segregate metallic from semiconducting nanotubules.
www.ewh.ieee.org /r6/san_francisco/nntc/Kanadjian_nantero.doc   (492 words)

 [No title]
Mechanisms of load and heat transfer in nanotubule-polymer composites are being studied as a function of matrix-fiber strength, nanotubule buckling, and functionalization of the nanotubules.
The structure and properties of a variety of materials utilizing carbon nanotubules are being predicted using atomic simulation.
Raman shifts for hydrogen in nanotube bundles have been predicted and are being used to help identify the position of intercalated hydrogen within these structures.
www.mse.ncsu.edu /CompMatSci/projects.html   (1573 words)

 'Smart' bio-nanotubes developed; may help in drug delivery
Their functions include the transport of neurotransmitter precursors in neurons.
They used the example of water beading up or coating a car, depending on whether or not the car has been waxed.
The nanotubule consisting of a three-layer wall appears to be the way the system compensates for this charge density mismatch, according to the authors.
www.eurekalert.org /pub_releases/2005-08/uoc--bd080205.php   (732 words)

 Pharmacy Choice - Pharmaceutical News - Smart bio-nanotubes for drug delivery developed: US scientists - July 28, 2006
"In our paper, we report on a new paradigm for lipid self-assembly leading to nanotubule formation in mixed charged systems," said Cyrus Safinya, a professor who led the study.
The researchers, having looked at the interaction between the negatively charged nanometer-scale hollow cylinders derived from cell cytoskeleton and positively charged lipid membranes, discovered that under the right conditions spontaneous lipid protein nanotubules will form.
The new type of self-assembly arises because of an extreme mismatch between the charge densities of microtubules and cationic lipid, the researchers said.
www.pharmacychoice.com /news/article.cfm?Article_ID=10243   (529 words)

 Uranium Satellites   (Site not responding. Last check: 2007-10-26)
I am anticipating counter plan arguments against both propulsion and extraterrestrial power applications of nuclear fission and hydrogen fusion explosives.
If several new spacecraft propulsion schemes employing carbon nanotubules are practical e.g.
super flywheel powered hydrogen propellant rockets; then nuclear designs would also be proportionately improved by carbon nanotubule techniques.
www.uraniumsatellites.info /index.html   (530 words)

 Nanomaterials in Electrochemistry - Storming Media
The second application concerns the development of a new type of ion-permselective membrane - the metal nanotubule membrane.
The transport properties of metal nanotubule membranes can also be made selective on the basis of either size or chemistry of the molecule to be transported; possible applications of these membranes in chemical separations are discussed.
The final application reviewed here entails the use of the template method to prepare monodisperse nanoparticles of Li(+)-intercalation materials for possible use as electrodes in Li-ion batteries.
www.stormingmedia.us /32/3269/A326943.html   (195 words)

 Biogenesis of Nanotubular Network in Toxoplasma Parasitophorous Vacuole Induced by Parasite Proteins -- Mercier et al. ...
The intracellular parasite Toxoplasma gondii develops within a nonfusogenic vacuole containing a network of elongated nanotubules
nanotubules; however, the initial formation of the posterior organizing
Nanotubules Formed by Highly Hydrophobic Amphiphilic {alpha}-Helical Peptides and Natural Phospholipids
www.molbiolcell.org /cgi/content/abstract/13/7/2397   (390 words)

 Nanostructured Assemblies of Thermoelectric Composite Materials   (Site not responding. Last check: 2007-10-26)
We have established synthetic programs in the template synthesis and characterization of nanomaterials including semiconductors, metals and carbon nanotubules.
These templates will serve as a structural and electronically and thermally insulating support so that the collective effects of the individual nanowires may be examined.
We will prepare hollow carbon nanotubule supports within these templates which will serve as our carbon-lined reactors within which we will create composite thermoelectric materials.
www.chm.colostate.edu /erf/research/thermo.htm   (195 words)

 TNT - Wikipedia, the free encyclopedia
TNT (software), Emacs instant messaging client using AOL TOC protocol.
Tunneling nanotubule, long, narrow tubes used by immune cells to communicate.
Typographical Number Theory, a formal axiomatic basis for number theory in mathematics
en.wikipedia.org /wiki/TNT   (255 words)

 Untitled Document   (Site not responding. Last check: 2007-10-26)
In the Howard Hughes Undergraduate internship, I independently developed a protocol combining the standard, indescriminate Coomassie Blue stain with an immunofluorescent stain.
For the summer of 2004, I wrote a Summer Undergraduate Research Proposal for work to develop a carbon nanotubule cardiac patch in Dr. J.
I did not participate in the program after all (opting to work for the NIH's BESIP program instead,) but the proposal was accepted for funding for the summer regardless.
www.annasophia.com /other/other.htm   (135 words)

 Lymphoma Information Network - The Lymphoma Blog
It works by inserting microscopic synthetic carbon nanotubule rods into cancer cells.
When the rods are exposed to near-infra red light from a laser they heat up, killing the cell, while cells without rods are left unharmed.
The researchers believe it should be possible to refine the technique still further, for instance by attaching an antibody to a nanotubule to target a particular kind of cancer cell.
www.lymphomainfo.net /blog/index.cgi?page=22   (1009 words)

 Charles R. Martin - StormingMedia
Nanotubule Membranes - Fundamentals and Applications in Electrochemical Energy and Stochastic Sensing Date: 14 NOV 2002
Molecular Filtration in Nanotubule Membranes: Sorting Molecules on the Basis of Size and Chemistry Date: 30 DEC 1998
Metal Nanotubule Membranes with Electrochemically Switchable Ion- Transport Selectivity Date: MAR 95
www.stormingmedia.us /authors/Martin_Charles_R_.html   (423 words)

 Supramolecular Constructs Comprising Addressable DNA-conjugated Proteins
Furthermore, a capture 'epitope' in the broadest sense need not comprise amino acids.
For example it could be a small synthetic organic conjugated to a carbon nanotubule, and recognized by an antibody.
3) The process of claim 1 or 2 wherein the capture 'epitopes' are affixed, directly or indirectly, to polynucleotides or carbon nanotubules.
www.wbabin.net /saba/saba52.htm   (555 words)

 [No title]   (Site not responding. Last check: 2007-10-26)
Jirage, K.B.; Martin, C.R. “Molecular Filtration in Nanotubule Membranes: Sorting Molecules on the Basis of Size and Chemistry,” Biological Molecules in Nanotechnology, (IBC) 1998, Chapter 12, pp.
Nishizawa, M.; Menon, V. P.; Martin, C. R., "Metal Nanotubule Membranes with Electrochemically Switchable Ion-Transport Selectivity," Science, 1995, 268, 700-702.
Parthasarathy, R. V.; Phani, K. N.; Martin, C. R., "Template Synthesis of Graphitic Nanotubules," Adv.
www.chem.ufl.edu /Divisions/Analytical/bio_nano/publications.doc   (4387 words)

 [Sci.nanotech] Re: Sword made of Nanotubule composite   (Site not responding. Last check: 2007-10-26)
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venusia.golgothe.net /pipermail/sci.nanotech/2004-June/001173.html   (137 words)

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