Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils. Xuesong Li 1 , Weiwei Cai 1 , Jinho An 1 , Seyoung Kim 2 , Junghyo Nah 2 , Dongxing Yang 1 , Richard Piner 1 , Aruna Velamakanni 1 , Inhwa Jung 1 , Emanuel Tutuc 2 , Sanjay K. Luigi Colombo 3 , * , Rodney S. . + Author Affiliations ↵ * To whom correspondence should be addressed. Graphene has been attracting great interest because of its distinctive band structure and physical properties. Organic Light-Emitting Diodes on Solution-Processed Graphene Transparent Electrodes - ACS Nano. † Department of Materials Science and Engineering ‡ Department of Electrical Engineering § Department of Chemical Engineering, Stanford University, Stanford, California 94305 Key Laboratory for Functional Polymer Materials and Center for Nanoscale Science & Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P.
R. China ACS Nano, 2010, 4 (1), pp 43–48 DOI: 10.1021/nn900728d Publication Date (Web): November 10, 2009 Copyright © 2009 American Chemical Society Section: Abstract Theoretical estimates indicate that graphene thin films can be used as transparent electrodes for thin-film devices such as solar cells and organic light-emitting diodes, with an unmatched combination of sheet resistance and transparency. Citing Articles View all 236 citing articles Citation data is made available by participants in CrossRef's Cited-by Linking service. This article has been cited by 57 ACS Journal articles (5 most recent appear below).
A U-Texas professor has been awarded a $1 million grant for Graphene research. Dr. Rodney S. Ruoff, a physical chemist from The University of Texas, has been awarded a $1 million grant from the W.M. Keck Foundation to lead a 3-year research on graphene. The research goal is to enable the large-scale creation and production of graphene and ultra thin graphite. The team plans to work in several phases to address the larger challenges facing scalable graphene. For example, when graphene is cut it typically loses its conductivity. Ruoff and team will study ways to reverse this loss as well as construct a new graphene reactor that will help identify pathways for scale-up. Via The University of Texas. Graphene paper - a new strong and flexible material. Samsung researchers create a graphene the size of a TV panel.
Local Peeling of Graphene. Defects in Graphene can make it even stronger. One-dimensional nanostructured tiO2 for photo catalytic activity and dye-sensitized solarcells applications. Graphene Supermarket. NBNL graphene nanobubbles photo. Physical Sciences and Engineering - Publications - Success Stories - Plastic Bags into Nanotubes.
Plastic bags have taken over the grocery market since they were first introduced more than 30 years ago. Billions of them are used around the world each year. The bags are recyclable, but a majority of them still end up in landfills. The Challenge Plastic grocery bags are made of polyethylene, which is non-biodegradable and made from nonrenewable resources (crude oil and natural gas). They can take hundreds of years to decompose in landfills and are one of the most challenging items for the recycling industry to manage. Left: Chemist Vilas Pol places a plastic bag into a specially designed reactor in the presence of a cobalt acetate catalyst to start the process.
Right: The resulting carbon nanotubes can be used as the anode material in lithium-ion batteries. The Solution Argonne scientists have discovered a way to convert plastic bags into carbon nanotubes, a substance that can be used as anode material in advanced batteries such as lithium-ion and eventually lithium-air batteries. More. COBALT ACETATE. Cobalt is a lustrous, silvery-blue metallic chemical element, symbol Co, atomic number of 27 and an atomic weight of 58.93. Cobalt is obtained primarily as a by-product of the mining and processing of copper and nickel ores.
Examples of cobalt ores include cobaltite [(Co,Fe)AsS], erythrite [(Co3(AsO4)2·8H2O)]. fukuchilite ( Cu3FeS8), glaucodot [(Co,Fe)AsS], linnaeite [(Co,Ni)3S4], skutterudite [(Co,Ni,Fe)As3], and smaltite [(Co,Fe,Ni)As2]. Cobalt is extracted as a by-product of nickel and copper concentration through pyrometallurgical, hydrometallurgical and electrolytic processes.
Cobalt contributes corrosion resistant and hardness if alloyed with other metals and when used in electroplating. The major uses of cobalt is preparing metal alloys. Cobalt-60 with a half-life of 5.3 years is a gamma ray source when used in radiotherapy and sterilization. It is used as a catalyst in the petroleum production and chemical synthesis. Carbon nanotube. Rotating Carbon Nanotube Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. Nanotubes have been constructed with length-to-diameter ratio of up to 132,000,000:1,[1] significantly larger than for any other material. These cylindrical carbon molecules have unusual properties, which are valuable for nanotechnology, electronics, optics and other fields of materials science and technology. In particular, owing to their extraordinary thermal conductivity and mechanical and electrical properties, carbon nanotubes find applications as additives to various structural materials.
For instance, nanotubes form a tiny portion of the material(s) in some (primarily carbon fiber) baseball bats, golf clubs, or car parts.[2] Nanotubes are members of the fullerene structural family. Applied quantum chemistry, specifically, orbital hybridization best describes chemical bonding in nanotubes. Types of carbon nanotubes and related structures[edit] Terminology[edit] Torus[edit] ... Lab Researchers Take A Critical First Step Toward Graphene Transistors : Graphene... Images, Pics, Photos, Wallpapers, Photogallery - 418973749258. S newest photos of graphene. Flickr Hive Mind is a search engine as well as an experiment in the power of Folksonomies. All thumbnail images come directly from Flickr, none are stored on Flickr Hive Mind.
These photos are bound by the copyright and license of their owners, the thumbnail links take to you to the photos (as well as their copyright and license details) within Flickr. Because some other search engines (Google, etc.) index parts of Flickr Hive Mind, you may have been led here from one of them. Welcome to Flickr Hive Mind, almost certainly the best search engine for photography on the web. If you are a Flickr user and use Flickr Stats you may have seen people being led to your photos via Flickr Hive Mind (as a Referrer). Flickr requires that I inform you that Flickr Hive Mind uses the Flickr API, but is neither endorsed nor certified by them. There are literally hundreds of other web tools built around the Flickr API, see Flickr Bits for a bunch of examples. Graphene timeline. Graphene, Nanotubes and Nanowires. Monday June 13, 2011, 9:00 am - 5:00 pm, Boston, Massachusetts Technology Focus The rapid progress in growing graphene as well as advances in the growth and separation of carbon nanotubes open a wide range of applications.
The unique properties of the three folded flat carbon world and the discovery of how to mass produce graphene and nanotubes, gives much hope to replace many often toxic or rare elements in today’s technology products with light weight, energy saving carbon nanostructures. In addition, there is tremendous progress in growing a variety of inorganic materials in a one-dimensional nanowire form for applications from electronics to sensors. This course focuses on all the essential aspects in these rapidly growing fields. Objective This course will first introduce graphene and carbon nanotubes and related carbon nanostructures, their basic properties and characteristics.
Course Contents 1. 2. 3. 4. 5. Course Instructors Dr. Dr. Wolfgang S. . ↑ Back to short courses. Home - Nanophysics Group, Kasetsart University. CV.pdf (application/pdf Object) Carbon Nanotubes - A Time Line. News. Vilas Ganpat Pol. Vilas_CV_CSE.pdf (application/pdf Object) Vilas ganpat pol, argonne national laboratory, email address. Plastic bags recycled into nanotubes - tech - 11 December 2009. By Colin Barras Waste plastic from “throwaway” carrier bags can be readily converted into carbon nanotubes.
The chemist who developed the technique has even used the nanotubes to make lithium-ion batteries. This is called “upcycling” – converting a waste product into something more valuable. Finding ways to upcycle waste could encourage more recycling: for instance, bacteria can convert plastic drinks bottles into a more expensive plastic. The carrier-bag-to-nanotube technique was developed by Vilas Ganpat Pol at the Argonne National Laboratory in Illinois and converts high or low-density polyethylene (HDPE and LDPE) into valuable multiwalled carbon nanotubes. Bag baker Pol made the nanotubes by cooking 1-gram pieces of HDPE or LDPE at 700 °C for 2 hours in the presence of a cobalt acetate catalyst and then letting the mixture cool gradually.
“Other methods generally require a vacuum to avoid oxygen interaction with the catalyst as well as with the system,” he says. Nanotube nuggets. Cooling Down Solid-Oxide Fuel Cells. Startup company SiEnergy Systems has overcome a major barrier to commercializing solid-oxide fuel cells with a prototype that operates at temperatures hundreds of degrees lower than those on the market today.
Working with Harvard materials science professor Shriram Ramanathan, SiEnergy Systems, based in Boston, has demonstrated a solid-oxide fuel cell that can operate at 500 degrees Celsius, as opposed to the 800 to 1,000 degrees required by existing devices. This allows the cell, which uses a thin-film electrolyte mechanically supported by a metal grid, to be much larger than similar devices fabricated before—on the order of centimeters in area, the size needed for practical applications, rather than micrometers.
If the electrolyte is very thin—just a few hundred nanometers thick—a solid-oxide fuel cell can operate at lower temperatures. Jet Propulsion Laboratory: Missions. Gravity Probe B: The Relativity Mission.