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Archive for the ‘nanotechnology’ category: Page 180

Nov 25, 2018

New Nanobots Kill Cancerous Tumors

Posted by in categories: biotech/medical, nanotechnology

In animal models, the nanobots caused damage to the tissue of the tumor within 24 hours of treatment.

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Nov 20, 2018

Lasers may help experts understand cancer

Posted by in categories: biotech/medical, nanotechnology, neuroscience

Scientists in Fife are investigating if tiny lasers could be used to better understand diseases such as cancer.

Using nano-technology, the St Andrews University experts created lasers small enough to fit inside live cells which can then be tracked.

With a diameter of a thousandth of a millimetre, the lasers can be inserted into neurons or immune cells.

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Nov 16, 2018

Peptide coatings boost iron oxide-based particles for diagnostic magnetic resonance imaging

Posted by in categories: biotech/medical, nanotechnology

Cancer will become easier to detect and diagnose early using magnetic resonance imaging (MRI) thanks to A*STAR researchers who have engineered biocompatible iron oxide nanoparticle contrast agents¹.

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Nov 16, 2018

Metallic nanoparticles light up another path towards eco-friendly catalysts

Posted by in categories: nanotechnology, particle physics

Scientists at Tokyo Institute of Technology produced subnano-sized metallic particles that are as much as 50 times more effective than well-known Au-Pd bimetallic nanocatalysts.

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Nov 16, 2018

Laser-activated nanotube skin shows where the strain is

Posted by in categories: nanotechnology, transportation

Whether they’re in airplane wings, bridges or other critical structures, cracks can cause catastrophic failure before they’re large enough to be noticed by the human eye. A strain-sensing “skin” applied to such objects could help, though, by lighting up when exposed to laser light.

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Nov 15, 2018

More realistic research needed on substances that enter the environment

Posted by in categories: biotech/medical, food, nanotechnology

Chemical substances and nanomaterials are processed on a massive scale in diverse products, while their risks have not been properly assessed. Time and again synthesised substances have been shown to pollute the environment more than lab tests predicted. This is the warning given by Professor of Ecotoxicology Martina Vijver from Leiden University in her inaugural lecture on 16 November.

Laboratory tests are inadequate, according to Vijver, because they do not imitate a complete ecosystem. In her inaugural lecture she will discuss in greater detail two examples of substances where more realistic research is needed: agricultural toxins and nanoparticles. ‘But the same can be said for many other groups of substances, such as antibiotics, plasticizers and GenX.’

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Nov 14, 2018

Detecting light in a different dimension

Posted by in categories: materials, nanotechnology

“We did not expect to see such a dramatic improvement just by changing the morphology of the polymer,” said co-corresponding author Mircea Cotlet, a materials scientist in the CFN Soft and Bio Nanomaterials Group.

The scientists believe that there are two explanations behind their observations.

“At a certain polymer concentration, the nanowires have dimensions comparable to the wavelength of light,” said Li. “This size similarity has the effect of increasing light scattering and absorption. In addition, crystallization of P3HT molecules within the nanowires provides more charge carriers to transfer electricity to the layer.”

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Nov 10, 2018

Nano-scale process may speed arrival of cheaper hi-tech products

Posted by in categories: energy, nanotechnology

An inexpensive way to make products incorporating nanoparticles—such as high-performance energy devices or sophisticated diagnostic tests—has been developed by researchers.

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Nov 9, 2018

A two-atom quantum duet

Posted by in categories: nanotechnology, particle physics, quantum physics

Researchers at the Center for Quantum Nanoscience (QNS) within the Institute for Basic Science (IBS) achieved a major breakthrough in shielding the quantum properties of single atoms on a surface. The scientists used the magnetism of single atoms, known as spin, as a basic building block for quantum information processing. The researchers could show that by packing two atoms closely together they could protect their fragile quantum properties much better than for just one atom.

The spin is a fundamental mechanical object and governs magnetic properties of materials. In a classical picture, the spin often can be considered like the needle of a compass. The north or south poles of the needle, for example, can represent spin up or down. However, according to the laws of quantum mechanics, the spin can also point in both directions at the same time. This superposition state is very fragile since the interaction of the spin with the local environment causes dephasing of the superposition. Understanding the dephasing mechanism and enhancing the quantum coherence are one of the key ingredients toward spin-based quantum information processing.

In this study, published in the journal Science Advances in November 9, 2018, QNS scientists tried to suppress the decoherence of single by assembling them closely together. The spins, for which they used single titanium atoms, were studied by using a sharp metal tip of a scanning tunneling microscope and the atoms’ were detected using . The researchers found that by bringing the atoms very close together (1 million times closer than a millimeter), they could protect the superposition of these two magnetically coupled atoms 20 times longer compared to an individual atom.

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Nov 8, 2018

A New Nanobot Drills Through Your Eyeball to Deliver Drugs

Posted by in categories: biotech/medical, nanotechnology

It simply twists its way through the dense tissue.

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