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Scientists Push Valleytronics One Step Closer to Reality

Valleytronics Thumbnail

Scientists have taken a big step toward the practical application of “valleytronics,” which is a new type of electronics that could lead to faster and more efficient computer logic systems and data storage chips in next-generation devices.

Nature-Inspired Nanotubes That Assemble Themselves, With Precision

Precision meets nano-construction, as seen in this illustration. Berkeley Lab scientists discovered a peptoid composed of two chemically distinct blocks (shown in orange and blue) that assembles itself into nanotubes with uniform diameters. (Credit: Berkeley Lab)

Scientists have discovered a family of nature-inspired polymers that, when placed in water, spontaneously assemble into hollow crystalline nanotubes. What’s more, the nanotubes can be tuned to all have the same diameter of between five and ten nanometers.

New Form of Electron-beam Imaging Can See Elements that are ‘Invisible’ to Common Methods

At right, this colorized image produced by a Berkeley Lab-developed electron imaging technique called STEM shows details of nanoscale gold particles and also a carbon film (blue). At left, an colorized image from a more conventional electron-based technique called ADF-STEM is mostly blind to the carbon material. (Colin Ophus/Berkeley Lab)

A new Berkeley Lab-developed electron-beam imaging technique, tested on samples of nanoscale gold and carbon, greatly improves images of light elements. The technique can reveal structural details for materials that would be overlooked by some traditional methods.

‘Lasers Rewired’: Scientists Find a New Way to Make Nanowire Lasers

Image showing a nanolaser emitting bright light.

Scientists at Berkeley Lab and UC Berkeley have found a simple new way to produce nanoscale wires that can serve as bright, stable and tunable lasers—an advance toward using light to transmit data.

Graphene is Strong, But Is It Tough?

Polycrystalline graphene contains inherent nanoscale line and point defects that lead to significant statistical fluctuations in toughness and strength. (Credit: Berkeley Lab)

Graphene, a material consisting of a single layer of carbon atoms, has been touted as the strongest material known to exist, 200 times stronger than steel, lighter than paper, and with extraordinary mechanical and electrical properties. But can it live up to its promise?

Polar Vortices Observed in Ferroelectric

Ramesh vortices feature

Berkeley Lab researchers have observed polar vortices in a ferroelectric material that appear to be the electrical cousins of magnetic skyrmions. This discovery holds intriguing possibilities for advanced electronic devices and could also rewrite our basic understanding of ferroelectrics.

Weaving a New Story for COFS and MOFs

Omar Weaving art illustation feature

An international collaboration led by Berkeley Lab scientists
has woven the first 3D covalent organic frameworks (COFs) from helical organic threads. The woven COFs display significant advantages in structural flexibility, resiliency and reversibility over previous COFs.

How to Train Your Bacterium

Peidong solar feature

Berkeley Lab researchers are using the bacterium Moorella thermoacetica to perform photosynthesis and also to synthesize semiconductor nanoparticles in a hybrid artificial photosynthesis system for converting sunlight into valuable chemical products.

Paul Alivisatos Wins the National Medal of Science

Paul Alivisatos

Berkeley Lab Director Paul Alivisatos has been named a winner of the 2015 National Medal of Science, the nation’s highest honor for lifetime achievement in fields of scientific research.

2D Islands in Graphene Hold Promise for Future Device Fabrication

This AFM image shows 2D F4TCNQ islands on graphene/BN that could be used to modify the graphene for electronic devices.

Berkeley Lab researchers have discovered a new mechanism for assembling two-dimensional molecular “islands” that could be used to modify graphene at the nanometer scale for use in electronic devices.