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DOE/Lawrence Berkeley National Laboratory


New path to more efficient organic solar cells uncovered at Berkeley Lab's advanced light source

Scientists found that impure domains in polymer-based organic photovoltaic cells can lead to improved performances if made sufficiently small. By studying the trifecta of ALS beamlines, they discovered a happy medium between purity and domain size that should be easier to achieve than ultra-high purity.

SourceDOE/Lawrence Berkeley National Laboratory·JournalAdvanced Energy Materials·DateJan 7, 2013

Flexing fingers for micro-robotics: Berkeley Lab scientists create a powerful, microscale actuator

Researchers developed an elegant and powerful new microscale actuator based on vanadium dioxide material, which expands and contracts in response to temperature variations. The actuators are smaller than human hair width and offer large force and displacement, suitable for biological and microfluidic applications.

The best of both catalytic worlds

Researchers at Berkeley Lab develop a new technique to create sustainable heterogenized homogeneous nanocatalysts with high reactivity and selectivity. This breakthrough combines the best properties of both heterogeneous and homogeneous catalysts, enabling control over product distribution in industrial chemistry processes.

SourceDOE/Lawrence Berkeley National Laboratory·JournalNature Chemistry·DateOct 10, 2012

A welcome predictability

Researchers have developed an adaptor that makes genetic engineering of microbial components more predictable, converting regulators of translation into regulators of transcription in Escherichia coli. This allows for the construction of increasingly complex functions in microorganisms, enabling safer and more efficient production of e...

SourceDOE/Lawrence Berkeley National Laboratory·JournalNature Methods·DateOct 8, 2012

Rust never sleeps

Electron mobility in iron oxide is crucial for understanding chemical reaction mechanisms, including uranium groundwater reactions and low-cost solar energy devices. The study reveals the rates of electron transport vary depending on iron oxide structure, with rates ranging from a single hop to five hops per nanosecond.

Forcing the molecular bond issue

Researchers developed a comprehensive model to describe molecular bonding, enabling predictions of binding free energy and resolving past inconsistencies. The new model provides a clear means for measuring this key parameter, critical for understanding material interactions.

SourceDOE/Lawrence Berkeley National Laboratory·JournalProceedings of the National Academy of Sciences·DateSep 5, 2012

Good vibrations

Scientists at Berkeley Lab and UC Berkeley have made the first direct observations of distinctly quantum optical effects - amplification and squeezing - in an optomechanical system. The findings point toward low-power quantum optical devices and enhanced detection of gravitational waves.

A direct look at graphene

Researchers at Lawrence Berkeley National Laboratory have made the first direct observations of electron-electron interactions in graphene. The study reveals that these interactions are critical to graphene's extraordinary properties, including its superconductivity and high-speed conductivity.

SourceDOE/Lawrence Berkeley National Laboratory·JournalNature Physics·DateAug 1, 2012

Ferroelectricity on the nanoscale

Researchers mapped ferroelectric structural distortions in individual nanocrystals using the world's most powerful transmission electron microscope. The study indicates that a monodomain ferroelectric state remains stable down to dimensions of less than 10 nanometers, and room-temperature polarization flipping was demonstrated down to ...

SourceDOE/Lawrence Berkeley National Laboratory·JournalNature Materials·DateJul 10, 2012