Ghostek launches the world's first headphones with graphene drivers

Ghostek announced a new graphene-based headphones, the Rapture Wireless Headphones. Ghostek says that the Rapture uses 40 mm graphene drivers to deliver a "Next-Level HD Audio Experience". Other features include Bluetooth 4.1+EDR, aptX Audio Technology, soft protein leather ear cups, a 3.5mm audio jack input, built-in HD microphone and a LED battery status.

Ghostek Rapture photo

Ghostek's Rapture Wireless Headphones will ship on January 22 for $125. You can pre-order it now on Amazo.com.

Graphene membrane to potentially improve efficiency and reduce length of dialysis treatments

Researchers at the University of Florida's Department of Mechanical and Aerospace Engineering are developing a graphene-based membrane that aims to improve the process of dialysis treatments and reduce treatment times.

To achieve these goals, the researchers identified two things that needed addressing: the configuration of the membrane, and the material from which it was made. “This membrane is based on simplicity,” the team said. “It is based on something that uses forces of physics, rather than brute force. I made it simple through better understanding and utilizing molecular and nanomaterials self-assembly processes”.

Manchester team creates graphene oxide membranes that can filter organic solvents

Researchers at the National Graphene Institute and School of Chemical Engineering and Analytical Science at The University of Manchester have developed an ultra-thin membrane using graphene-oxide sheets, that were assembled in a way that they were able to completely remove various organic dyes, dissolved in methanol, which were as small as a nanometre. This is exciting as GO membranes were once thought to be permeable only to aqueous solutions, but the researchers developed a new form of graphene oxide membrane that can filter organic solvents.

Manchetser and NGI team created unique GO membranes image

In the newly developed ultrathin membranes, graphene-oxide sheets are assembled in such a way that pinholes formed during the assembly are interconnected by graphene nanochannels, which produces an atomic-scale sieve allowing the large flow of solvents through the membrane. When used to filter Cognac and whisky, the membrane permitted alcohol to pass through but trapped the larger molecules that gives the whisky its color. Professor Nair, which led the group, said that "the clear whisky smells similar to the original whisky but we are not allowed to drink it in the lab, however it was a funny Friday night experiment!”

Researchers at The University of Manchester create miniaturized pressure sensors using graphene membranes

Researchers at The University of Manchester have fabricated highly sensitive miniaturized pressure sensors using graphene membranes.

The team reported that the new sensor was made possible by developing a way to effectively float a graphene membrane mere nanometers above a silicon chip. When pressure moves this membrane closer to the surface of the chip, the resulting change in capacitance is measured to read out the pressure change. By fabricating thousands of such floating membranes next to each other, a device can be made of exceptionally high sensitivity to pressure changes.

ERDC team develops a GO-based water treatment system

Researchers at the U.S. Army Engineer Research and Development Center (ERDC) are developing a water treatment system based on a mix of graphene oxide and a byproduct made from shrimp shells.

ERDC develops GO membranes for water treatment image

The ERDC team’s breakthrough was the ability to scale the membranes from the inch and a half diameter membranes other labs throughout the world are working on, to sheets stretching up to two feet long with the potential of making them as big as needed.

XFNANO: Graphene and graphene-like materials since 2009XFNANO: Graphene and graphene-like materials since 2009