Popular Science articles about Physics & Chemistry

Phosphorene, a single layer of phosphorous in a particular configuration, has potential application in semiconductor transistors.

One minus 1 does not always equal 0 in chemistry

In the world of chemistry, one minus one almost always equals zero.

New discovery may help engineers design quieter jet airplanes

Contours of decibel levels of the sound emitted from a supersonic jet. The nozzle exit is located at the magenta dot in each figure, and the jet flows from the nozzle to the right. Jet noise is computed using high-fidelity large eddy simulation (LES) in the top panel, using one wavepacket computed from the parabolized stability equations (PSE) in the middle panel, and through a superposition of input-output (I/O) modes from the new analysis technique in the bottom panel. While all three methods capture the peak jet noise at an angle of 30°, I/O modes also recover sideline noise as observed in the high-fidelity simulation.If you've ever experienced the exceptionally powerful and reverberating sounds of a jet during takeoff, you likely won't be surprised that the noise produced by jet engines is ranked among...

Missing links brewed in primordial puddles?

Nearly twins and possibly keys to a unlocking the mystery of the evolution of life-coding molecules. Nicholas Hud holds up Uracil, on the right, a nucleobase of RNA. Barbituric acid, on the left, looks very much like it and could have been part of a proto-RNA that preceded RNA.The crucibles that bore out early building blocks of life may have been, in many cases, modest puddles.

ORNL researchers discover new state of water molecule

ORNL researchers discovered that water in beryl displays some unique and unexpected characteristics.Neutron scattering and computational modeling have revealed unique and unexpected behavior of water molecules under extreme confinement that is unmatched by any known gas, liquid or solid states.

Researcher studies how animals puncture things

Illinois animal biology professor Philip Anderson and his colleagues found that increasing the speed of a projectile enhances its ability to puncture an object more effectively than increasing its mass.If shooting arrows from a crossbow into cubes of ballistics gelatin doesn't sound like biological science to you, you've got a lot to learn from University of Illinois animal biology...

Attosecond physics: New movies from the microcosmos

With the aid of terahertz radiation, Munich physicists have developed a method for generating and controlling ultrashort electron pulses. With further improvements, this technique should be capable of capturing even...

The atom without properties

A microchip is used to trap a cloud of ultracold atoms and to entangle the atoms' magnetic moments.The microscopic world is governed by the rules of quantum mechanics, where the properties of a particle can be completely undetermined and yet strongly correlated with those of other particles....

Cellphone principles help microfluidic chip digitize information on living cells

Fatih Sarioglu, an assistant professor in Georgia Tech's School of Electrical and Computer Engineering, holds a hybrid microfluidic chip that uses a simple circuit pattern to assign a unique seven-bit digital identification number to each cell passing through the channels.Phone calls and text messages reach you wherever you are because your phone has a unique identifying number that sets you apart from everybody else on the network. Researchers at...

New material combines useful, typically incompatible properties

Mild-mannered Dr. Jekyll and malicious Mr. Hyde were opposite aspects of the same man, and their story ended in tragedy because the two couldn't peacefully coexist.

Team builds first quantum cascade laser on silicon

3-D artistic depiction of multiple Quantum Cascade Lasers integrated above silicon waveguides.A team of researchers from across the country, led by Alexander Spott, University of California, Santa Barbara, USA, have built the first quantum cascade laser on silicon. The advance may...

Chemists use DNA to build the world's tiniest thermometer

Researchers at University of Montreal have created a programmable DNA thermometer that is 20,000x smaller than a human hair. This scientific advance reported this week in the journal Nano Letters may significantly aid our understanding of natural and human designed...

It takes more than peer pressure to make large microgels fit in

Researchers now believe they understand why oversized microgel particles spontaneously shrink to allow formation of colloidal crystals in assemblies of smaller microparticles. Shown in a laboratory used to study the particles is Georgia Tech Associate Professor Alberto Fernandez-Nieves.When an assembly of microgel particles includes one particle that's significantly larger than the rest, that oversized particle spontaneously shrinks to match the size of its smaller neighbors. This self-healing...

Researchers create artificial protein to control assembly of buckyballs

Gevorg Grigoryan, an assistant professor of computer science at Dartmouth College, and his collaborators have created an artificial protein that self-organizes into a new material -- an atomically periodic lattice of buckminster fullerene molecules, or buckyball, a sphere-like molecule composed of 60 carbon atoms shaped like a soccer ball.A Dartmouth College scientist and his collaborators have created an artificial protein that organizes new materials at the nanoscale.

Iowa State engineers develop micro-sized, liquid-metal particles for heat-free soldering

Martin Thuo holds a vial of the liquid-metal particles produced by his research group. Working behind him are, left to right, Simge Cinar, Jiahao Chen and Ian Tevis.Martin Thuo likes to look for new, affordable and clean ways to put science and technology to work in the world.

The reliability of material simulations put to test

Several international scientists from over 30 universities and institutes teamed to investigate to what extent quantum simulations of material properties agree when they are performed by different researchers and...

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Cleaning up hybrid battery electrodes improves capacity and lifespan

Ion soft landing distributes negative POM ions (bright spots) evenly onto a supercapacitor, leaving unwanted positive ions behind.Hybrid batteries that charge faster than conventional ones could have significantly better electrical capacity and long-term stability when prepared with a gentle-sounding way of making electrodes.

Advances in extracting uranium from seawater announced in special issue

Oak Ridge National Laboratory researchers developed a fiber to adsorb uranium from seawater. Researchers at Pacific Northwest National Laboratory exposed the fibers to Pseudomonas fluorescens and used the Advanced Photon Source at Argonne National Laboratory to create a 3-D X-ray microtomograph to determine that the fiber structure was not damaged by the organism.The oceans hold more than four billion tons of uranium--enough to meet global energy needs for the next 10,000 years if only we could capture the element from seawater to...

Numerical simulations shed new light on early universe

Innovative multidisciplinary research in nuclear and particle physics and cosmology has led to the development of a new, more accurate computer code to study the early universe. The code simulates...

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New method enlists electricity for easier, cheaper, greener chemistry

Scripps Research Institute chemists Phil Baran (left) and Evan Horn pose in front of an electric car, whose principles of sustainable transport pertain to the sustainable chemistry in the Baran lab's new electrochemical allylic oxidation reaction, which eliminates toxic chemicals from a widely employed chemical process.Scientists at The Scripps Research Institute (TSRI) have found a new and better way to achieve a chemical reaction that is used widely in the pharmaceutical as well as flavor...

With simple process, UW-Madison engineers fabricate fastest flexible silicon transistor

One secret to creating the world's fastest silicon-based flexible transistors: a very, very tiny knife.

Model makes designing new antennas orders of magnitude faster

Researchers at North Carolina State University have developed a model that allows antenna designers to identify efficient configurations for antenna designs in minutes, rather than days. The model is designed...

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