—Hollow Graphene Spheres “Layer-by-layer deposition over a polystyrene bead template leads to a new type of graphene structure” Broadening the range of structures that can be prepared from graphene, researchers in South Korea have developed a layer-by-layer deposition method for forming hollow graphene spheres (J.
by Mitch Jacoby | November 29, 2010
—Nanotube rebar helps toughen graphene “Measurements reveal that reinforcing graphene with carbon nanotubes makes it twice as resistant to tears and fractures” The carbon-carbon bonds in graphene are some of the strongest found in nature. But the overall material is brittle, fracturing with ease at minor flaws in its structure. Now, sensitive measurements and simulations reveal that adding carbon nanotubes helps graphene resist fracture in much the same way that rebar makes concrete more resilient (ACS Nano 2018, DOI: 10.1021/acsnano.8b02311). James M. Tour of Rice University and colleagues first made the graphene-nanotube hybrid in 2014 by coating a copper surface with carbon nanotubes, growing graphene on top using chemical vapor deposition, and then peeling off the nanotube-embedded graphene (ACS Nano, DOI: 10.1021/nn501132n).
by Katherine Bourzac, special to C&EN | September 03, 2018
—Simple Technique Transfers Clean Graphene Sheets “Materials Science: A novel method allows engineers to build graphene-based electronics with good performance” Graphene has a dirty little secret. When researchers build electronic devices with it, the standard process they use to move sheets of the delicate, single-atom-thick material into place can lead to contamination or damage that reduces device performance.
by Kate Greene, special to C&EN | February 13, 2014
—Partnership Targets Graphene Electrodes “” Norway’s Graphene Batteries has signed an agreement with CVD Equipment, a manufacturer of chemical vapor deposition equipment, to jointly develop electrodes for lithium-ion batteries that do not require binders. Graphene Batteries has experimented with and synthesized graphene derivatives such as graphene oxide and reduced graphene oxide in its work to develop what it calls safe and durable high-energy battery materials.
by Melody M. Bomgardner | August 19, 2013
Graphene, atom-thick sheets of carbon commonly made from graphite, has potential applications in display screens, flexible electronics, and batteries. In the scheme, investors are offered a portion of a graphene stockpile that would be sold at a later date for a higher price. But many products referred to as “graphene” are actually other forms of graphite, FCA says. What’s more, prices for true graphene are already decreasing as firms have made more of it. Research on graphene has attracted a great deal of interest in Europe. In 2012, the U.K. government said it would spend $83 million to create a graphene R&D hub. Last October, the European Commission announced a $1.3 billion investment over 10 years in graphene research. “There are a lot of tremendous opportunities for graphene—there is reason to be excited,” says John S. Lettow, president of Maryland-based Vorbeck Materials, a producer of graphene and graphene inks. “But in the last two years, the price of our inks has dropped by more than half.” Lettow sees opportunities to invest in firms that make or use graphene, but graphene itself will not be a scarce resource. /articles/92/i1/Investment-Scam.html 20140106 Graphene: U.K. regulator warns investors against buying the carbon material News of The Week 92 1 /magazine/92/09201.html Investment Scam graphene, fraud notw bus Melody M. Bomgardner materials INVESTMENT SCAM U.K. regulator warns investors against buying graphene Chemical & Engineering News Investment Scam Investment Scam
by Melody M. Bomgardner | January 06, 2014