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3D graphene could replace expensive platinum in solar cells

August 22, 2013

A field emission scanning electron microscopy (FESEM) image of 3D honeycomb-structured graphene. The novel material can replace platinum in dye-sensitized solar cells with virtually no loss of generating capacity. Hui Wang image

Michigan Technological University, scientists have replaced expensive ($1,500 an ounce) platinum in solar cells with low-cost 3D graphene.

Regular graphene is a two-dimensional form of carbon. Yun Hang Hu, the Charles and Caroll McArthur Professor of Materials Science and Engineering at MTU, and his team invented a way to synthesize a 3D version, with a honeycomb-like structure.

The 3D graphene had excellent conductivity and high… read more

3D imaging methodology reveals nano details not seen before

Understanding nanoparticles at atomic scale in three dimensions could improve materials
March 28, 2013

A representation of a 3-D atomic resolution screw dislocation in a platinum nanoparticle. (Illustration: Chien-Chun Chen and I-Sheng Chou, UCLA)

A team of scientists from the University of California, Los Angeles (UCLA) and Northwestern University has produced 3-D images and videos of a tiny platinum nanoparticle at atomic resolution that reveal new details of defects in nanomaterials that have not been seen before.

Prior to this work, scientists only had flat, two-dimensional images with which to view the arrangement of atoms.

The… read more

3D IR images now in full color

August 7, 2013

Spectro-microtomographic images of a human hair show absorptions of protein (red) and phospholipid (blue-green). Center, the medulla is observed to have little protein. Bottom, the medulla has higher concentrations of phospholipids.

Researchers have created a non-destructive 3D imaging technique that provides molecular-level chemical information of unprecedented detail on biological and other specimens with no need to stain or alter the specimen.

Developed by researchers at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of Wisconsin-Milwaukee (UWM), the technique combines Fourier Transform Infrared (FTIR) spectroscopy with computed tomography (CT-scans).

“The… read more

3D maps let travellers take virtual city tours

November 7, 2006

Microsoft’s updated Virtual Earth mapping software includes photo-realistic three-dimensional models of real buildings and other structures.

3D maps show brain gene activity

June 25, 2002

A 3D map of the brain’s genetic activity should help researchers pinpoint the neurological underpinnings of autism, schizophrenia and other brain disorders.

3D mash-up maps let you ‘edit’ the world

December 1, 2009

(Ordnance Survey)

As part of a project to demonstrate the potential of 3D mapping, lasers were fired at the coastal resort of Bournemouth in southern England from the ground and from the air to capture the height of buildings, trees and other features, using a technique called Lidar.

Adding information from aerial photos and traditional surveys produced a full-color 3D map, built up from more than 700 million points. The map… read more

3D material that behaves like graphene discovered

June 5, 2014

Scientists at Oxford, SLAC, Stanford and Berkeley Lab have discovered that a sturdy 3-D material, cadmium arsenide, mimics the electronic behavior of 2-D graphene. This illustration depicts fast-moving, massless electrons inside the material. The discovery could lead to new and faster types of electronic devices. (Credit: Greg Stewart/SLAC)

Cadmium arsenide could yield practical devices with the same extraordinary electronic properties as 2D graphene, researchers from Oxford, SLAC, and Berkeley Lab have found.

In addition, the new “semimetal” material exists in a sturdy 3D form that should be much easier to shape into electronic devices such as very fast transistors, sensors and transparent electrodes, the researchers say.

The results are described… read more

3D microvascular network allows for repeated self-healing in composite materials

April 18, 2014

microvascular networks

Researchers at the Beckman Institute for Advanced Science and Technology at the University of Illinois at Urbana-Champaign have created a 3D vascular system that allows high-performance composite materials such as fiberglass to heal autonomously and repeatedly.

Internal damage in fiber-reinforced composites, which are used in structures of modern airplanes and automobiles, is difficult to detect and nearly impossible to repair by conventional methods. A small, internal crack… read more

3D model for lung cancer mimics the real thing

October 12, 2012

lung_cancer_methodist_hospital

Using a new technique that allows scientists to grow lung cancer cells in three dimensions, researchers at The Methodist Hospital and the University of Texas MD Anderson Cancer Center have created a model that uses biological matter to form miniature lungs that mimic the structure and function of real lung cancer, after which human lung cancer cells are added.

The model could accelerate discoveries for a type of cancer that has benefited… read more

3D nanotube assembly technique for nanoscale electronics

October 23, 2008
(Evin Gultepe et al.)

Northeastern University researchers have developed a method for high-volume manufactuing of three-dimensional, single-wall carbon nanotube electrical interconnects without the need for high-temperature synthesis.

They assemble the nanotubes into 3D structures by using an applied electric field to coax the nanotubes into deep nanoholes in a porous alumina template.

The method could also integrate well into existing silicon platforms for use in microelectronics, field emission displays, electronic… read more

3D neural reconstruction guided with biocompatible nanofiber scaffolds and hydrogels

April 3, 2015

Images of neuronal cultures in 3D hydrogel with laminin-coated nanofibers (100× magnification). Blue marks nanofibers and red marks neurites. (credit: Richard J. McMurtrey/Journal of Neural Engineering)

Damage to neural tissue is typically permanent and causes lasting disability in patients. But a method for reconstructing neural tissue using patterned nanofibers in 3D hydrogel structures promises to one day help in the restoration of functional neuroanatomical pathways and structures at sites of spinal cord injury, traumatic brain injury, tumor resection, stroke, and neurodegenerative diseases.

Richard J. McMurtrey, director of the Institute of Neural Regeneration &read more

3D plasma shapes created in thin air

February 28, 2006

The night sky could soon be lit up with gigantic three-dimensional ads, thanks to a Japanese laser display that creates glowing images in thin air.

The display uses an ionization effect which occurs when a beam of laser light is focused to a point in air.

3D printed car is as strong as steel, half the weight, and nearing production

March 1, 2013

urbee

Picture an assembly line not that isn’t made up of robotic arms spewing sparks to weld heavy steel, but a warehouse of plastic-spraying printers producing light, cheap and highly efficient automobiles.

If Jim Kor’s dream is realized, that’s exactly how the next generation of urban runabouts will be produced, Wired reports. His creation is called the Urbee 2 and it could revolutionize parts manufacturing while creating… read more

3D printed meat development funded

August 17, 2012

modern_meadow_meat

Billionaire investor Peter Thiel’s philanthropic foundation has announced a six-figure grant for bioprinted meat, part of an ambitious plan to bring to the world’s dinner tables a set of technologies originally developed for creating medical-grade tissues, CNET reports.

The recipient of the Thiel Foundation’s grant, a Columbia, Mo.-based startup named Modern Meadow, is pitching bioprinted meat as a more environmentally-friendly way to satisfy… read more

3D printer brings animated movie stars to life

March 5, 2009

A 3D printer (“prints” small objects) has been used for the first time, in the new animated movie Coraline, to give characters in an animated movie a far greater range of facial expressions than has been possible before, replacing painstaking hand-sculpting of every facial expression,

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