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Nanoparticles

Newly designed nanoparticles can quickly locate a tumor, then set off a chemical reaction ...

To minimize the toxic effects of chemotherapy, many researchers have been working to develop nanoparticles that that deliver drugs directly to tumors. But researchers at MIT claim that even the best of these nanoparticles are typically only able to deliver about one percent of the drug to their intended target. Now, a team has developed a new delivery system that sees a first wave of nanoparticles homing in on a tumor that then calls in a larger second wave that dispenses the cancer drug. In a mouse study, the new approach was found to boost drug delivery to tumors by over 40-fold.  Read More

A diagram depicting how a nanobead-equipped chemical assay device could work (Image: OSU)

Handheld biosensors and diagnostic devices could be taking a huge step forward, thanks to recent advances made in the use of ferromagnetic iron oxide nanoparticles – also known as magnetic nanobeads. According to scientists from Oregon State University (OSU), the use of such particles in chemical detection systems could make those systems much smaller, faster, cheaper to produce, and more accurate than they are presently.  Read More

Professors Cor Koning (left) and Paul van der Schoot (right), with their new transparent c...

With its two chief properties of excellent electrical conductivity and optical transparency, indium tin oxide (ITO) can be found in transparent conductive coatings for displays found in all kinds of products, such as TVs, mobile phones and laptops, and is also used as a transparent electrode in thin-film solar cells. Unfortunately indium is a rare metal and available supplies could run out in as little as ten years. This has prompted researchers to search for alternatives with some success already reported using carbon nanotubes and copper nanowires. The latest ITO replacement material also uses carbon nanotubes, as well as other commonly available materials, and is environmentally friendly.  Read More

Microscopic image of the biodiesel emulsion fuel created by researchers

Nanoparticles have added yet another string to their microscopic bows with a new study showing that the addition of alumina nanoparticles can improve the performance and combustion of biodiesel, while producing fewer emissions. In the study, a team at India’s National Institute of Technology in Tiruchirappalli used nanoparticles with an average diameter of 51 billionths of a meter. The high surface-to-volume ratio of the nanoparticles means they have more reactive surfaces, which allows them to act as more efficient chemical catalysts and results in increased fuel combustion.  Read More

Scientists have created paper filters covered with silver nanoparticles, that could be use...

Silver is well-known for its antibacterial qualities, which has led to the use of silver nanoparticles in devices such as an experimental water filtration system developed by Stanford University. That system is intended as a relatively permanent setup, and it requires a small electrical current. Researchers from Montreal’s McGill University, however, have come up with a silver-based water treatment system that could conceivably be used instantly, in any place and at any time. While not intended as a routine method of killing water-borne bacteria, it could be very useful in emergency situations such as disaster relief.  Read More

Immune cells, tagged with green fluorescent protein, are surrounded by nanoparticles (red)...

Vaccines work by exposing the body to an infectious agent in order to prime the immune system to respond quickly when it encounters the pathogen again. Some vaccines, such as the diphtheria vaccine, consist of a synthetic version of a protein or other molecule normally made by the pathogen, while others, such as the polio and smallpox vaccines, use a dead or disabled form of the virus. However, such an approach cannot be used with HIV because it's difficult to render the virus harmless. MIT engineers have now developed a new type of nanoparticle that could safely and effectively deliver vaccines for infectious diseases such as HIV and malaria, and could even help scientists develop vaccines against cancer.  Read More

A nanoparticle-based process allows blood clots to show up on a new type of CT scan (Image...

Every year, millions of people come into emergency rooms complaining of chest pains, yet those pains are only sometimes due to heart attacks. Unfortunately in many of those cases, the only way to be sure of what’s going on is to admit the patient for an overnight stay, and administer time-consuming and costly tests. Now, however, a new procedure could reveal the presence and location of a blood clot within hours. It’s made possible by the injection of nanoparticles, each containing a million atoms of bismuth – a toxic heavy metal.  Read More

Project lead researcher Dr. Stefan Bon

One of the promising areas in the field of nanomedicine is the development of vesicles – microscopic polymer sacs, designed to deliver a payload of medication to specific sites in the body. Unfortunately, the body’s immune system often sees these vesicles as intruders, sending antibodies to thwart them in their mission. Now, drawing inspiration from plankton and bacteria, chemists from the University of Warwick are developing armor coatings that should help vesicles to withstand or avoid those attacks.  Read More

Copper-coated nanoparticles have been shown to be up to twice as effective as activated ca...

Nanotechnology has made huge advances possible in a variety of scientific fields, but the average non-scientist may particularly appreciate one of its latest applications – eliminating foul odors. In recent tests conducted by scientists from the University of Florida, copper-coated silica nanoparticles were shown to be up to twice as effective as activated carbon for neutralizing ethyl mercaptan, which is the stinky ingredient in natural gas.  Read More

Scientists have coated paper with silver nanoparticles, to create a 'killer paper' packagi...

Silver is a known killer of harmful bacteria, and has already been incorporated into things such as antibacterial keyboards, washing machines, water filters, and plastic coatings for medical devices. Now, scientists have added another potential product to the list: silver nanoparticle-impregnated “killer paper" packaging, that could help keep food from spoiling.  Read More

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