Carbon materials

$Research by MIT graduate student Ashley Kaiser (left) and postdoc Itai Stein shows that a small fraction of carbon nanotubes added to phenol-formaldehyde resin lowers the processing temperature needed to achieve the best combination of hardness and low density by 200 degrees Celsius.$

Glassy carbon, now with less heat

Carbon nanotubes lower the transformation temperature of glassy carbon, possibly aiding manufacturers, MIT researchers report.

September 1, 2017

A new flexible graphene solar cell developed at MIT is seen in the transparent region at the center of this sample. Around its edges are metal contacts on which probes can be attached during tests of device performance.

Transparent, flexible solar cells

Researchers develop a novel technique using graphene to create solar cells they can mount on surfaces ranging from glass to plastic to paper and tape.

July 28, 2017

Instead of relying on silicon-based devices, a new chip uses carbon nanotubes and resistive random-access memory (RRAM) cells. The two are built vertically over one another, making a new, dense 3-D computer architecture with interleaving layers of logic and memory.

New 3-D chip combines computing and data storage

Advance points toward new generation of computers for coming superstorm of data.

July 5, 2017

1) Graphene, grown on copper foil, is pressed against a supporting sheet of polycarbonate. 2) The polycarbonate acts to peel the graphene from the copper. 3) Using interfacial polymerization, researchers seal large tears and defects in graphene. 4) Next, they use oxygen plasma to etch pores of specific sizes in graphene.

Scientists produce dialysis membrane made from graphene

Material can filter nanometer-sized molecules at 10 to 100 times the rate of commercial membranes.

June 28, 2017

MIT physicists have found that a flake of graphene, when brought in close proximity with two superconducting materials, can inherit some of those materials’ superconducting qualities. As graphene is sandwiched between superconductors, its electronic state changes dramatically, even at its center. Pictured is the experimental concept and device schematic.

Sandwiched between superconductors, graphene adopts exotic electronic states

Platform may be used to explore avenues for quantum computing.

May 4, 2017

On the left, an atomic-force microscopy image shows a nanoporous graphene membrane after a burst test at 100 bars. The image shows that failed micromembranes (the dark black areas) are aligned with wrinkles in the graphene. On the right, two zoomed-in scanning electron microscopy images of graphene membranes show the before (top) and after of a burst test at pressure difference of 30 bars. The i...

Graphene holds up under high pressure

Used in filtration membranes, ultrathin material could help make desalination more productive.

April 24, 2017

(Left to right): Postdoc Kyusang Lee, Professor Jeehwan Kim (sitting), and graduate students Samuel Cruz and Yunjo Kim.

Not stuck on silicon

Engineers use graphene as a “copy machine” to produce cheaper semiconductor wafers.

April 19, 2017

Researchers at MIT have found a way to make graphene with fewer wrinkles, and to iron out the wrinkles that do appear. They found each wafer exhibited uniform performance, meaning that electrons flowed freely across each wafer, at similar speeds, even across previously wrinkled regions.

Researchers “iron out” graphene’s wrinkles

New technique produces highly conductive graphene wafers.

April 3, 2017

MIT aerospace researchers have demonstrated that some randomness in the arrangement of carbon atoms makes materials that are lighter and stronger, shown at lower right in illustration, compared to a more densely packed and tightly ordered structure, shown lower left. They formed a type of disordered graphite-like carbon material that is often called glassy carbon by “baking” a phenol-formadehy...

Disorder can be good

Researchers discover that chaos makes carbon materials lighter and stronger.

March 17, 2017

Institute Professor Emerita Mildred Dresselhaus, a pioneer in the electronic properties of materials, dies at 86

“Queen of carbon science” and recipient of Presidential Medal of Freedom and National Medal of Science led US scientific community, promoted women in STEM.

February 21, 2017