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The Lead

Taking aircraft manufacturing out of the oven

April 14, 2015 8:03 am | by Jennifer Chu, MIT News Office | News | Comments

Composite materials used in aircraft wings and fuselages are typically manufactured in large, industrial-sized ovens: Multiple polymer layers are blasted with temperatures up to 750 F, and solidified to form a solid, resilient material. Using this approach, considerable energy is required first to heat the oven, then the gas around it, and finally the actual composite.

Cool process to make better graphene

March 18, 2015 8:05 am | by Ker Than, Caltech | News | Comments

A new technique invented at Caltech to produce graphene at room temperature could help pave the...

Building tailor-made DNA nanotubes step-by-step

February 24, 2015 8:10 am | by McGill Univ. | News | Comments

Researchers at McGill Univ. have developed a new, low-cost method to build DNA nanotubes block-...

Shape-shifting groups of nanorods release heat differently

February 19, 2015 9:11 am | by Justin H.S. Breaux, Argonne National Laboratory | News | Comments

Researchers have revealed previously unobserved behaviors that show how details of the transfer...

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Precision growth of light-emitting nanowires

February 6, 2015 9:12 am | by Kate Greene, Lawrence Berkeley National Laboratory | News | Comments

A novel approach to growing nanowires promises a new means of control over their light-emitting and electronic properties. In a recent issue of Nano Letters, scientists from Lawrence Berkeley National Lab demonstrated a new growth technique that uses specially engineered catalysts. These catalysts, which are precursors to growing the nanowires, have given scientists more options than ever in turning the color of light-emitting nanowires.

Uniform nanowire arrays for science, manufacturing

December 8, 2014 8:36 am | by Kris Bertness, NIST | News | Comments

Defect-free nanowires with diameters in the range of 100 nm hold significant promise for numerous in-demand applications. That promise can't be realized, however, unless the wires can be fabricated in large uniform arrays using methods compatible with high-volume manufacture. To date, that has not been possible for arbitrary spacings in ultra-high vacuum growth.

Nanoparticle allows low-cost creation of 3-D nanostructures

December 8, 2014 7:51 am | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

Researchers from North Carolina State Univ. have developed a new lithography technique that uses nanoscale spheres to create 3-D structures with biomedical, electronic and photonic applications. The new technique is significantly less expensive than conventional methods and does not rely on stacking 2-D patterns to create 3-D structures.

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Collaboration points to improved nanomaterials

November 21, 2014 8:01 am | by Jim Barlow, Director of Science and Research Communications, Univ. of Oregon | News | Comments

A potential path to identify imperfections and improve the quality of nanomaterials for use in next-generation solar cells has emerged from a collaboration of Univ. of Oregon and industry researchers. To increase light-harvesting efficiency of solar cells beyond silicon's limit of about 29%, manufacturers have used layers of chemically synthesized semiconductor nanocrystals.

'Direct writing' of diamond patterns from graphite a potential technological leap

November 6, 2014 10:00 am | by Emil Venere, Purdue Univ. | News | Comments

What began as research into a method to strengthen metals has led to the discovery of a new technique that uses a pulsing laser to create synthetic nanodiamond films and patterns from graphite, with potential applications from biosensors to computer chips.

Self-assembled membranes hint at biomedical applications

October 28, 2014 11:36 am | by David Lindley, Argonne National Laboratory | News | Comments

Techniques for self-assembling of molecules have grown increasingly sophisticated, but biological structures remain a challenge. Recently, scientists have used self-assembly under controlled conditions to create a membrane consisting of layers with distinctly different structures. At the Advanced Photon Source, the team has studied the structures and how they form, paving the way for hierarchical structures with biomedical applications.

Fraunhofer develops economical process for micro energy harvesting

October 27, 2014 9:52 am | News | Comments

The trend toward energy self-sufficient probes and ever smaller mobile electronics systems continues, and are used to monitor the status of the engines on airplanes, or for medical implants. They gather the energy they need for this from their immediate environment, such as vibrations. Fraunhofer Institute researchers have developed a process for the economical production of piezoelectric materials that supply this type of energy.

NIST offers electronics industry two ways to snoop on self-organizing molecules

October 23, 2014 12:33 pm | News | Comments

A few short years ago, the idea of a practical manufacturing process based on getting molecules to organize themselves in useful nanoscale shapes seemed far-fetched. Recent work at NIST, Massachusetts Institute of Technology and IBM Almaden Research Center suggest this capability isn’t far off, however, by demonstrating self-assembly of thin films on a polymer template that creates precise rows just 10 nm wide.

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Scientist invent new method for fabricating graphene nanoribbons

October 17, 2014 9:23 am | by Shaun Mason, UCLA | News | Comments

Graphene’s exotic properties can be tailored by cutting large sheets down to ribbons of specific lengths and edge configurations. But this “top-down” fabrication approach is not yet practical, because current lithographic techniques always produce defects. Now, scientists from the U.S. and Japan have discovered a new “bottom-up” self-assembly method for producing defect-free graphene nanoribbons with periodic zigzag-edge regions.

A simple and versatile way to build three-dimensional materials of the future

October 16, 2014 10:14 am | News | Comments

Researchers in Japan have developed a new yet simple technique called "diffusion driven layer-by-layer assembly" to construct graphene into porous 3-D structures for applications in devices such as batteries and supercapacitors. The new method borrowed a principle from polymer chemistry, known as interfacial complexation, to allow graphene oxide to form a stable composite layer with an oppositely charged polymer.

Scientists synthesize a two-element atomic chain inside a carbon nanotube

October 16, 2014 10:05 am | News | Comments

Researchers at Japan’s National Institute of Advanced Industrial Science and Technology have synthesized an atomic chain in which two elements, cesium and iodine, are aligned alternately inside a carbon nanotube. Analyzed using electron microscopy and spectroscopy, the invention could shed light on the adsorption mechanisms of radioactive elements.

Fast, cheap nanomanufacturing

October 6, 2014 9:19 am | by Larry Hardesty, MIT | News | Comments

Arrays of tiny conical tips that eject ionized materials are being made at the Massachusetts Institute of Technology. The technology, which harnesses electrostatic forces, has a range of promising applications, such as spinning out nanofibers for use in “smart” textiles or propulsion systems for fist-sized “nanosatellites.” The latest prototype array that generates 10 times the ion current per emitter that previous arrays did.

World’s smallest reference material is a big plus for nanotechnology

September 25, 2014 9:44 am | News | Comments

If it's true that good things come in small packages, then NIST can now make anyone working with nanoparticles very happy. The institute recently issued Reference Material (RM) 8027, the smallest known reference material ever created for validating measurements of man-made, ultrafine particles between 1 and 100 nm in size.

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Low-cost, “green” transistor heralds advance in flexible electronics

September 24, 2014 10:02 am | News | Comments

As tech company LG demonstrated this summer with the unveiling of its 18-in flexible screen, the next generation of roll-up displays is tantalizingly close. Researchers are now reporting a new, inexpensive and simple way to make transparent, flexible transistors that could help bring roll-up smartphones with see-through displays and other bendable gadgets to consumers in just a few years.

New solar cells serve free lunch

September 24, 2014 9:07 am | by Poncie Rutsch, Okinawa Institute of Science and Technology | News | Comments

A common complaints about solar power is that solar panels are still too expensive. Efforts at making them more efficient or longer-lasting have been limited. A new method developed in Okinawa could solve the expense problem: A hybrid form of deposition is being used to create perovskite solar cells from a mixture of inexpensive organic and inorganic raw materials, eliminating the need for expensive crystallized silicon.

Startup scales up graphene production, develops biosensors and supercapacitors

September 19, 2014 10:59 am | Videos | Comments

Glenn Johnson, CEO of BlueVine Graphene Industries Inc., said many of the methodologies being utilized to produce graphene today are not easily scalable and require numerous post-processing steps to use it in functional applications. He said his company has developed a way to scale graphene production using a roll-to-roll chemical vapor deposition process.

Scientists refine formula for nanotube types

September 17, 2014 9:52 am | by Mike Williams, Rice Univ. | Videos | Comments

Many a great idea springs from talks over a cup of coffee. But it’s rare and wonderful when a revelation comes from the cup itself. Rice Univ. theoretical physicist Boris Yakobson, acting upon sudden inspiration at a meeting last year, obtained a couple of spare coffee cups from a server and a pair of scissors and proceeded to lay out—science fair-style—an idea that could have far-reaching implications for the nanotechnology industry.

Materials experts construct precise inter-nanotube junctions

September 15, 2014 12:05 pm | News | Comments

A new method for controllably constructing precise inter-nanotube junctions and structures in carbon nanotube (CNT) arrays, Northeastern Univ. researchers say, is facile and easily scal­able. It will allow them to tailor the phys­ical prop­er­ties of nan­otube net­works for use in appli­ca­tions ranging from elec­tronic devices to CNT-reinforced com­posite mate­rials found in every­thing from cars to sports equipment.

Nanotechnology to provide cleaner diesel engines

September 9, 2014 8:32 am | by Bertel Henning Jensen, Technical Univ. of Denmark | News | Comments

When it comes to diesel engine catalysts, which are responsible for cleansing exhaust fumes, platinum has unfortunately proved to be the only viable option. This has resulted in material costs alone accounting for half of the price of a diesel catalyst. Researchers in Denmark say they have developed a new way to manufacture catalysts that may result in a 25% reduction in the use of platinum.

Doped graphene nanoribbons with potential

September 9, 2014 7:40 am | News | Comments

Typically a highly conductive material, graphene becomes a semiconductor when prepared as an ultra-narrow ribbon. Recent research has now developed a new method to selectively dope graphene molecules with nitrogen atoms. By seamlessly stringing together doped and undoped graphene pieces, ”heterojunctions” are formed in the nanoribbons, allowing electric current to flow in only one direction when voltage is applied.

New analytical technology reveals nanomechanical surface traits

August 27, 2014 5:03 pm | by Emil Venere, Purdue Univ. | News | Comments

Researchers have discussed the merits of surface-stress influence on mechanical properties for decades. Now, a new research platform, called nanomechanical Raman spectroscopy and developed at Purdue Univ., uses a laser to measure the "nanomechanical" properties of tiny structures undergoing stress and heating.

DARPA project aims to make nanoscale benefits life-sized

August 27, 2014 11:55 am | News | Comments

Many common materials exhibit different and potentially useful characteristics when fabricated at extremely small scales. But lack of knowledge of how to retain nanoscale properties in materials at larger scales and lack of assembly capabilities for items have prevented us from taking advantage of these nanoscale characteristics. DARPA has created the Atoms to Product (A2P) program to help overcome these challenges.

Tiny graphene drum could form future quantum memory

August 26, 2014 4:03 pm | Videos | Comments

Scientists in The Netherlands have demonstrated that they can detect extremely small changes in position and forces on very small drums of graphene. Graphene drums have great potential to be used as sensors in devices such as mobile phones. Using their unique mechanical properties, these drums could also act as memory chips in a quantum computer.

Custom-made nanotubes

August 13, 2014 12:39 pm | News | Comments

Researchers in Europe have succeeded for the first time in growing single-walled carbon nanotubes with only a single, prespecified structure. The nanotubes thereby have identical electronic properties. The decisive trick was producing the carbon nanotube from custom-made organic precursor molecules.

Eco-friendly pre-fab nanoparticles could advance nanomanufacturing

August 13, 2014 11:21 am | by Janet Lathrop, UMass Amherst | News | Comments

A team of materials chemists, polymer scientists, device physicists and others at the Univ. of Massachusetts Amherst report a breakthrough technique for controlling molecular assembly of nanoparticles over multiple length scales that should allow faster, cheaper, more ecologically friendly manufacture of organic photovoltaics and other electronic devices.

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