Search Results
521 Results for "graphene"
Functionalized Graphene Nanoballs
—Functionalized Graphene Nanoballs “Simple method crumples graphene flakes and coats them with metal or metal oxide nanocrystals” A one-pot procedure converts solutions of graphene oxide and precursor ions to crumpled sheets of graphene decorated with nanocrystals, according to a study led by researchers at the University of Wisconsin, Milwaukee (ACS Nano, DOI: 10.1021/nn302818j).
by Mitch Jacoby | August 13, 2012
Sniffing single molecules with graphene
—Sniffing single molecules with graphene “Unorthodox architecture helps graphene achieve extreme resolution” Electronic sensors can now sniff out single gas molecules by using graphene, according to a research team from the Japan Advanced Institute of Science & Technology (Sci. Adv. 2016, DOI: 10.1126/sciadv.1501518).
by Matt Davenport | April 18, 2016
Advertisement
Graphene-Amyloid Combo
—Graphene-Amyloid Combo “Materials consisting of alternating layers of graphene and amyloid protein fibrils function as shape-shifting biosensors” Nanocomposites made of alternating layers of graphene and amyloid protein fibrils could improve graphene-based materials for biological applications, scientists at ETH Zurich report (Nat.
by Celia Henry Arnaud | May 14, 2012
Graphene’s global race to market
“Looking further forward, graphene could be a key enabler for making devices like this stretchable,” he says. Princeton University spin-off Vorbeck Materials started marketing graphene and graphene inks about five years ago and is now selling graphene-enhanced radio frequency identification tags. Graphene enables the tags to be used at high temperatures and pressures without being compromised, says Vorbeck President John Lettow.
by Alex Scott | April 11, 2016
Graphene growth process overcomes high-performance electronics logjam
—Graphene growth process overcomes high-performance electronics logjam “Researchers have grown single-crystal graphene on an insulating surface” Making high-performance computer circuits from graphene requires starting with high-quality films of the material on an insulating surface. But defects usually crop up when graphene is grown directly on or transferred to an insulator from another growth substrate.
by Prachi Patel, special to C&EN | January 30, 2022
‘Shaving’ Graphene
—‘Shaving’ Graphene “Nanoscience: Zinc treatment chemically peels off layers of graphene” Demonstrating the ultimate in “taking a little off the top,” chemists at Rice University have developed a method for etching multilayer graphene by chemically shaving off one layer at a time (Science, DOI: 10.1126/science.1199183).
by Bethany Halford | March 07, 2011
Advertisement
Holey graphene translates to working transistor
This isn’t the first time nanoporous graphene has been prepared. Scientists have used a top-down approach, poking holes into graphene with a laser beam. But holes made this way tend to be too big, don’t have the desired precision, and don’t result in a semiconducting material. Other kinds of nanoporous graphene made via the bottom-up approach of chemical synthesis have not been reported as working in devices yet. “In general, fabrication of electronic devices from nanoscale graphene structures is very challenging,” says Alexander Sinitskii, a chemist who studies graphene nanoribbons at the University of Nebraska, Lincoln. “But this new material can be efficiently translated into devices: Three out of every four transistors made with the nanoporous graphene work, which is pretty impressive,” he says.
by Bethany Halford | April 12, 2018
Graphene-Molecule Hybrid Structures
—Graphene-Molecule Hybrid Structures “Graphene and organic molecules form nanowires via a back-and-forth self-assembly process” Graphene and organic molecules can combine to form novel hybrid nanostructures via a self-assembly process in which the adsorbate (the molecules) and substrate (graphene) interchange roles during assembly, according to chemists at the National University of Singapore (ACS Nano, DOI: 10.1021/nn101800n). Shuai Wang, Bee Min Goh, Kian Ping Loh, and coworkers report that when the planar aromatic compound perylenedicarboximide (PDI) is deposited from solution onto an oxidized form of graphene, π-π interactions between PDI and graphene cause the PDI molecules to nucleate and grow into wires. As the process continues and the wires’ dimensions outgrow the supporting graphene flake, the same type of noncovalent interaction drives other graphene flakes to adsorb onto and coat the growing wire.
by Mitch Jacoby | September 20, 2010