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Archives :: Processing & Handling :: Nanotechnology

Displaying 21 - 40 of 49 stories.
March 15, 2008
Newsfront: Forum Makes a Big Deal about Nanotech
On January 31, 2008, law firm Chadbourne & Parke LLP held its "Nanotechnology, Law & Commerce" forum exploring "Business at One-Billionth of a Meter." A total of 18 invited speakers explored a variety of topics including the current state of nanotech R&D; public policy, politics and legal issues; the financing and underwriting of nanotech; and "nanoethics." George...
http://www.che.com/processing_and_handling/nanotechnology/Newsfront-Forum-Makes-a-Big-Deal-about-Nanotech_3718.html
February 15, 2008
Chementator: One less step to make activated carbon with dispersed metal nanoparticles
Nanostructured microporous carbons containing well-dispersed metal nanoparticles have the potential to improve the performance of fuel cells or catalysis. However, traditional techniques for embedding metal particles in porous carbons (post-synthesis treatment either by impregnation, adsorption, or ion exchange) can lead to uncontrolled growth of metal particle size, shape and aggregation, which can cause...
http://www.che.com/processing_and_handling/nanotechnology/Chementator-One-less-step-to-make-activated-carbon-with-dispersed-metal-nanoparticles_3685.html
February 15, 2008
Photons to electrons, & vice versa
Technical innovations in light emitting diodes (LEDs) and photovoltaics have consistently reflected the similarities between the two technologies. In fact, research groups at many universities, such as  the University of Michigan (Ann Arbor, Mich.; www.umich.edu) and the University of Southern California (USC; Los Angeles, Calif.; www.usc.edu), are studying both simultaneously. With pressing consumer...
http://www.che.com/processing_and_handling/nanotechnology/Photons-to-electrons-and-vice-versa_3697.html
January 15, 2008
Chementator: Purification of Single-walled Nanotubes Using Froth Flotation
A method for the purification of single-walled carbon nanotubes (SWNTs) in four sequential steps — oxidative pretreatment, acid treatment, silica dissolution, and froth flotation — has been proposed by a team from the Petroleum and Petrochemical College, Chulalongkorn University (Bangkok, Thailand; edlinks.che.com/7368-536). Team leader Sumaeth Chavadej says the...
http://www.che.com/processing_and_handling/nanotechnology/Chementator-Purification-of-Single-walled-Nanotubes-Using-Froth-Flotation_3617.html
November 15, 2007
Extracting HMs
The latest issues of the J. of Separation Sci. and the J. of Colloid Interface Sci. report on a new material, nanostructured silica, which can be functionalized to extract heavy metals (HMs), such as mercury, lead, cadmium and...
http://www.che.com/processing_and_handling/nanotechnology/Extracting-HMs_3513.html
October 1, 2007
Capacity increase for carbon nanotubes
Bayer MaterialScience AG (BMS; Leverkusen, Germany; edlinks.che.com/6900-541) is opening a second production facility for Baytubes, its carbon nanotubes product, at H.C. Starck GmbH (Laufenburg, Germany). When...
http://www.che.com/processing_and_handling/nanotechnology/Capacity-increase-for-carbon-nanotubes_3383.html
September 1, 2007
'Nanowire' membranes for use in harsh environments
Technology for producing nanowires from titanium dioxide, and for fabricating the wires into free-standing membranes and other shapes, is being offered for sale by Intellectual Property Partners LLC (IP2; Atlanta, Ga.; edlinks.che.com/6899-540). The membranes are chemically inert and thermally stable up to...
http://www.che.com/processing_and_handling/nanotechnology/Nanowire-membranes-for-use-in-harsh-environments_3356.html
August 1, 2007
Ni-Rh nanowires show promise as new catalysts
A research team from Austria and Sweden have demonstrated that nanowires of a nickel-rhodium alloy exhibit a suprisingly high reactivity to oxygen. Using physical vapor deposition, the researchers have produced quasi one-dimensional rows of Ni atoms on a single-crystal rhodium substrate, which has Rh steps...
http://www.che.com/processing_and_handling/nanotechnology/Ni-Rh-nanowires-show-promise-as-new-catalysts_3303.html
July 1, 2007
Nanoparticles:Mild Dispersion
    As the nanoparticle market continues to swell, expertise is surfacing about nanoparticle grinding and dispersion processes. A grinding solution (wet grinding with agitator bead mills) achieves the production of nanoparticles with an average fineness of 40–100 nanometers (nm). However, dispersion doesn’t always come as easily. Chemists and process engineers found that many...
http://www.che.com/processing_and_handling/nanotechnology/NanoparticlesMild-Dispersion_3150.html
July 1, 2007
German scientists overcome 100-year old law of physics
Max Planck Innovation GmbH (Garching by Munich; edlinks.che.com/6897-536), the technology transfer agency of the Max Planck Society, has signed a co-exclusive license agreement with Leica Microsystems (Wetzlar) and Carl Zeiss MicroImaging GmbH (Göttingen, all Germany) for the RESOLFT (reversible saturable optical fluorescence transitions) technology, a method for providing molecular-scale resolution...
http://www.che.com/processing_and_handling/nanotechnology/German-scientists-overcome-100-year-old-law-of-physics_3287.html
June 1, 2007
Making very long carbon nanotubes
A scalable process for growing arrays of very-long, multiwalled carbon nanotubes (CNTs), is being developed by researchers at the University of Cincinnati (Ohio; edlinks.che.com/6896-537), in cooperation with FirstNano, a div. of CVC Equipment Corp. (Ronkonkoma, N.Y.; edlinks.che.com/6896-538). The process uses FirstNano’s EasyTube CNT system, which performs chemical-vapor...
http://www.che.com/processing_and_handling/nanotechnology/Making-very-long-carbon-nanotubes_3269.html
June 1, 2007
More-precious Pt
Researchers from the Georgia Institute of Technology (GIT; Atlanta; edlinks.che.com/6896-547) and Xiamen University (China) have produced a new form of platinum: 24-faceted nanocrystals whose catalytic activity per unit area can be as much as...
http://www.che.com/processing_and_handling/nanotechnology/More-precious-Pt_3276.html
April 1, 2007
Interphex Show Preview
    The world's largest pharmaceutical conference and exhibition, Interphex, will be held at the Jacob Javits Convention Center in New York from April 24-26. Approximately 1,000 global companies that serve the pharmaceutical and biotechnical industries will showcase their latest lines of equipment, technologies and services in the areas of manufacturing, sourcing and services, information...
http://www.che.com/processing_and_handling/nanotechnology/Interphex-Show-Preview_3163.html
April 1, 2007
The world's thinnest (carbon) membranes
Membranes that consist of a single layer of carbon atoms (called graphene) - the thinnest possible structure - have been created by researchers at Max Planck Institute for Solid State Research (Stuttgart, Germany; edlinks.che.com/6894-532) and at the University of Manchester (England...
http://www.che.com/processing_and_handling/nanotechnology/The-worlds-thinnest-carbon-membranes_3231.html
April 1, 2007
Carbon nanotube membranes
Another kind of carbon membrane (see previous item) is being developed at Lawrence Livermore National Laboratory (Livermore, Calif.; edlinks.che.com/6894-534). In this case, the membrane consists of a parallel array of tiny tubes, each of less than 2 nm dia. and several...
http://www.che.com/processing_and_handling/nanotechnology/Carbon-nanotube-membranes_3232.html
March 1, 2007
Trapping CO2
For developing a new technology that traps carbon dioxide and other pollutants so they can be removed, researchers from the University of Bath's Dept. of Chemical Engineering (edlinks.che.com/6893-551) have received the...
http://www.che.com/processing_and_handling/nanotechnology/Trapping-CO2_3226.html
February 1, 2007
Making porous nanoparticles
Researchers from the Chemistry Dept. at the University of Minnesota (Minneapolis; edlinks.che.com/6892-535) have discovered a new way to prepare monodisperse, discrete nanoparticles of silica with specific shapes, such as cubes, tetrapods and spheres. The shaped particles can be porous, and thus have enhanced surface areas, making them suitable for a number of "guest-host" applications, such as...
http://www.che.com/processing_and_handling/nanotechnology/Making-porous-nanoparticles_3202.html
January 1, 2007
A process makes possible the large-scale synthesis of carbon nanomaterials
Researchers from the Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, University of Sydney (Australia; edlinks.che.com/6891-538) have produced spiral and straight carbon nanotubes (CNTs) in a fluidized bed (FB) by adjusting the synthesis temperature, catalyst compostion, and carbon source. The process has the potential to produce large quantities of high-quality CNTs...
http://www.che.com/processing_and_handling/nanotechnology/A-process-makes-possible-the-large-scale-synthesis-of-carbon-nanomaterials_3189.html
December 1, 2006
Make your own batch of CNTs with this system
Up to now, carbon nanotubes (CNTs) have been produced from hydrocarbons in large, high-temperature furnaces operating in an inert-gas atmosphere. A simpler system that requires only a liquid reagent instead of multiple gas cylinders, has been commercialized by Microphase Co., Ltd. (Tsukuba, Japan...
http://www.che.com/processing_and_handling/nanotechnology/Make-your-own-batch-of-CNTs-with-this-system_3045.html
October 1, 2006
Three-phase emulsifying technology makes a better diesel fuel
Researchers at Kanagawa University (Yokohama, Japan; edlinks.che.com/6517-535) have developed a three-phase emulsification technology for making stable emulsions of diesel-fuel oil in water. Tests with the emulsion (involving a 30-ton truck) show that fuel-combustion efficiency is increased by 10-15% compared to conventional diesel fuel, and the emissions of dust and nitrogen oxides are reduced by 95 and...
http://www.che.com/processing_and_handling/nanotechnology/Three-phase-emulsifying-technology-makes-a-better-diesel-fuel_3013.html
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