Materials fortified with carbon nanotubes are strongest when the embedded filaments run parallel to each other, but electronic and thermal conductivity are best when the nanotubes are oriented randomly. That the finding from a team of engineers at the University of Pennsylvania who have developed a production technique that permits a finer and more precise dispersion of nanotubes within a material.
The results, which could give scientists the tools to customize nano-tube-laced materials to meet their particular needs, are reported online this week and in the Dec. 15 print edition of the Journal of Polymer Science Part B: Polymer Physics. Less than one-ten-thousandth the width of a human hair, carbon nanotubes possess unparalleled strength, superior heat-conducting properties and a unique ability to adopt the electrical properties of either semiconductors or metals, but so far they have failed to back up this theoretical potential with real-world applications.
"A major hurdle that has prevented us from mixing nanotubes into materials to take advantage of these remarkable properties is their stubborn tendency to bundle together," said Karen I. Winey, associate professor of materials science and engineering at Penn. "Uniform dispersion of nanotubes in materials is absolutely critical to harnessing their strength, electrical conductivity and thermal stability."
Greg Lester | University of Pennsylvania
From ancient fossils to future cars
21.10.2016 | University of California - Riverside
Study explains strength gap between graphene, carbon fiber
20.10.2016 | Rice University
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences