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Nano world: Where towers construct themselves

Researchers develop method to control ordering of self-assembling structures, inducing reversible switching and transformation between arrangements. Nano-scale materials with specific properties are crucial for various applications in electronics, photovoltaics and biomimetic material synthesis.

SourceUniversity of Vienna·JournalNano Letters·DateJun 2, 2014

Eumelanin's secrets

Eumelanin, the primary pigment in human skin, hair, and eyes, has been found to absorb a broad spectrum of sunlight due to its unique physical arrangement. Researchers have identified that disorder in the material's structure plays a crucial role in its broadband blocking ability.

SourceMassachusetts Institute of Technology·JournalNature Communications·DateMay 22, 2014

Playing pool with carbon atoms

Scientists at the University of Arizona have developed a way to control graphene's crystal structure using an electric field. This breakthrough could lead to the creation of faster and more versatile transistors, which would enable faster computing and new applications for graphene in microelectronics.

SourceUniversity of Arizona·JournalNature Materials·DateApr 30, 2014

The motion of the medium matters for self-assembling particles, Penn research shows

Researchers attach DNA-coated building blocks to form structures, but simulations predicted defects. They found hydrodynamic effects play a critical role in the structures' formation, making some patterns more likely than others. This discovery improves our understanding of particle assemblies and has implications for various systems.

SourceUniversity of Pennsylvania·JournalProceedings of the National Academy of Sciences·DateApr 9, 2014

Expanding particles to engineer defects

Adding an impurity to a two-dimensional lattice structure can create defects that settle into harmony, restoring order and creating a 'screen' to protect the rest of the material. This finding could lead to new ways of engineering materials with unique properties.

SourceNorthwestern University·JournalProceedings of the National Academy of Sciences·DateApr 8, 2014

Scientists watch nanoparticles grow

Researchers at Århus University used X-ray light to track the growth of tungsten oxide nanoparticles, which can be tailored for smart windows and solar cells. The study shows that nanoparticles form from octahedra units in solution and develop a predominantly ordered crystal structure as they grow.

SourceDeutsches Elektronen-Synchrotron DESY·JournalAngewandte Chemie International Edition·DateMar 27, 2014

Mitochondrial ribosome revealed

Researchers at ETH Zurich deciphered the structure of the large subunit of the mitochondrial ribosome, a complex enzyme that deciphers genetic code and assembles amino acids into proteins. The study's success relies on a combination of high-resolution cryo-electron microscopy and chemical cross-linking combined with mass spectrometry.

SourceETH Zurich·JournalNature·DateJan 23, 2014

Epigenetics enigma resolved

Researchers have determined the molecular structure of a Tet family member from Naegleria gruberi, providing insights into its role in regulating gene expression and potential therapeutic targets for cancer. The study sheds light on how Tet enzymes interact with DNA, enabling scientists to design drugs that manipulate them.

SourceEmory Health Sciences·JournalNature·DateDec 25, 2013

Study shows how water dissolves stone, molecule by molecule

Scientists at Rice University and MARUM developed a new computerized model to simulate the complex chemistry at the boundary layer, where quartz and water meet. The model accurately predicts dissolution rates, which could revolutionize engineering calculations related to building materials and radioactive waste storage.

SourceRice University·JournalThe Journal of Physical Chemistry C·DateDec 5, 2013

Making a gem of a tiny crystal

A Northwestern University research team successfully built near-perfect single crystals out of nanoparticles and DNA, transforming disordered materials into orderly crystal structures. The technique, developed by Chad Mirkin and Monica Olvera de la Cruz, holds promise for novel technologies and new industries.

SourceNorthwestern University·JournalNature·DateNov 27, 2013

Diamond 'flaws' pave way for nanoscale MRI

Researchers at Cambridge's Cavendish Laboratory have achieved high coherence in nitrogen-vacancy centers of nanodiamonds, enabling the creation of ultra-precise nanoscale magnetic field and temperature detectors. This breakthrough could enhance our understanding of chemical reactions within single cells and signalling in neural networks.

SourceUniversity of Cambridge·JournalNature Materials·DateNov 24, 2013

Researchers at Penn add another tool in their directed assembly toolkit

The University of Pennsylvania researchers have developed a new tool to direct the assembly of particles and materials using elastic energy. This technique, combined with a new template design, allows for the creation of complex patterns and structures. The team's findings could lead to breakthroughs in fields such as displays, sensors...

SourceUniversity of Pennsylvania·JournalProceedings of the National Academy of Sciences·DateNov 12, 2013

Crystal mysteries spiral deeper, NYU chemists find

Researchers found that L-cystine crystals form stacked hexagonal 'islands' with one screw dislocation, contradicting long-standing BCF theory. However, further analysis revealed that the crystals actually grow in a manner predicted by the theory, showcasing the complexity of crystal growth.

SourceNew York University·JournalProceedings of the National Academy of Sciences·DateOct 9, 2013

Flawed diamonds: Gems for new technology

A team of researchers has made the first detailed observation of how energy travels through diamonds containing nitrogen-vacancy centers, defects that can be manipulated with optical methods. The findings could help scientists understand the properties of these diamonds, which have potential applications in quantum computing and imagin...

SourceUniversity of Arizona·JournalNature Physics·DateOct 8, 2013

Oregon lab changes game for synthesizing new materials

Researchers at the University of Oregon have developed a game-changing approach to synthesize thousands of new compounds with ultra-low thermal conductivity. The team designed layered elemental precursors that self-assemble into metastable compounds with predictable nano-architectures and specific crystallographic orientations.

SourceUniversity of Oregon·JournalJournal of the American Chemical Society·DateJul 31, 2013

Measuring molecules in their undistorted form

Researchers at Bielefeld University can now determine the three-dimensional structure of gaseous molecules with unprecedented precision. The university's electron diffractometer allows for the analysis of small molecules in their pure state, shedding light on fundamental questions about atomic arrangements.

Watching solar cells grow

Researchers have developed a new method to accelerate the growth of solar cells by optimizing the coevaporation process. This technique enables faster growth stages while controlling defect formation, resulting in improved efficiency and reduced material waste. The findings, published in Advanced Energy Materials, provide valuable insi...

SourceHelmholtz Association·JournalAdvanced Energy Materials·DateJun 27, 2013

Kinks and curves at the nanoscale

New research finds that coherent twin boundaries in metals contain tiny kink-like steps and curvatures, making them stronger but also more electrically resistant. This discovery challenges previous understanding of these materials and could lead to improved engineering designs for high-strength applications.

SourceUniversity of Vermont·JournalNature Materials·DateMay 19, 2013