Advertisement
Nanoparticles
Subscribe to Nanoparticles
View Sample

FREE Email Newsletter

Shape-shifting nanoparticles flip from sphere to net in response to tumor signal

May 29, 2013 8:10 am | News | Comments

Scientists at the University of California, San Diego have designed tiny spherical particles to float easily through the bloodstream after injection, then assemble into a durable scaffold within diseased tissue. An enzyme produced by a specific type of tumor can trigger the transformation of the spheres into net-like structures that accumulate at the site of a cancer.

Crystals melt when they're cooled

May 23, 2013 8:57 am | News | Comments

Growing thin films out of nanoparticles in ordered, crystalline sheets would be a boon for materials researchers, but the physics is tricky because particles of that size don’t form crystals the way individual atoms do. Using bigger particles as models, physicists have predicted some unusual properties of nanoparticle crystal growth.

Researchers develop radioactive nanoparticles that target cancer cells

May 22, 2013 9:09 am | News | Comments

Scientists in Missouri have successfully created nanoparticles made of a radioactive form of the element lutetium. By covering these particles with gold shells and attaching targeting agents, they have a tool that can seek out dangerous secondary lymphoma tumors. They recently demonstrated the nanoparticles can find the tumors without attaching to or damaging healthy cells.

Advertisement

A nano solution in the fight against diabetes

May 16, 2013 9:38 am | by Anne Trafton, MIT News Office | News | Comments

Injectable nanoparticles developed at Massachusetts Institute of Technology may someday eliminate the need for patients with Type 1 diabetes to constantly monitor their blood-sugar levels and inject themselves with insulin. The nanoparticles were designed to sense glucose levels in the body and respond by secreting the appropriate amount of insulin.

Bovine blood keeps gold nanoparticles stable

May 14, 2013 10:35 am | News | Comments

According to recent research at Rice University, bovine serum albumin (BSA) forms a protein “corona” around gold nanoparticles that keeps them from aggregating, particularly in high-salt environments like seawater. The discovery could lead to improved biomedical applications and contribute to projects that use nanoparticles in harsh environments.

Microgravity nanomedicine experiment may go to Space Station

May 14, 2013 10:00 am | News | Comments

Nearly all drugs taken orally spike in concentration, decay quickly, and are only at their peak effectiveness for a short period of time. working on a solution―nanocapsules implanted beneath the skin that release pharmaceutical drugs through a nanochannel membrane and into the body at a sustained, steady rate. To design better nanochannels for a given drug, the team is hoping to use the International Space Station.

Researchers develop synthetic HDL cholesterol nanoparticles

May 14, 2013 9:46 am | News | Comments

A new study by University of Georgia researchers documents a technological breakthrough: Synthetic high density lipoprotein (HDL) nanoparticles. A completely biodegradable synthetic version of the so-called good cholesterol, the nanoparticles represent a potential new detection and therapy regimen for atherosclerosis.

Platinum nanoparticles may keep fruit fresh longer

May 13, 2013 8:16 am | News | Comments

Ripening fruit, vegetables, and flowers release ethylene, which works as a plant hormone. Ethylene accelerates ripening, so other unripened fruit also begins to ripen—fruit and vegetables quickly spoil and flowers wilt. researchers in Japan have now introduced a new catalytic system for the fast and complete degradation of ethylene. This could keep the air in warehouses ethylene-free, keeping perishable products fresh longer.

Advertisement

Feynman's double-slit experiment preserved

May 13, 2013 8:05 am | News | Comments

Described as the "most beautiful experiment in physics," Richard Feynman emphasized how the diffraction of individual particles at a grating is an unambiguous demonstration of wave-particle duality and contrary to classical physics. A research team recently used carefully made fluorescent molecules and nanometric detection accuracy to provide clear and tangible evidence of the quantum behavior of large molecules in real time.

Perfectly doped quantum dots yield colors to dye for

May 10, 2013 2:01 pm | by Jeanne Galatzer-Levy, UIC | News | Comments

Researchers at the University of Illinois at Chicago have developed a way to introduce precisely four copper ions into a single quantum dot. The introduction of these “guest” ions opens up possibilities for fine-tuning the optical properties of the quantum dots and producing spectacular colors. When the crystallinity is perfect, they become very emissive and end up being the world’s best dye.

Building protocells from inorganic nanoparticles

May 10, 2013 1:05 pm | News | Comments

Researchers at the University of Bristol in the U.K. have led a new enquiry into how extremely small particles of silica (sand) can be used to design and construct artificial protocells in the laboratory. By attaching a thin polymer layer to the external surface of an artificial inorganic protocell built from silica nanoparticles, the scientists have potentially the problem of controlling membrane permeability.

Building protocells from inorganic nanoparticles

May 10, 2013 8:07 am | News | Comments

Cells are the basic unit of life and are separated from the outside world by a thin organic membrane. A major function of this membrane is to allow certain molecules to enter or leave the cell whilst other molecules are blocked from the cell interior. This allows metabolic processes to take place. Controlling membrane permeability is therefore a key challenge when building artificial cells in the form of enclosed chemical systems.

Bacteria adapt, evade nanosilver's sting

May 8, 2013 8:22 am | News | Comments

Researchers have cautioned that more work is needed to understand how microorganisms respond to the disinfecting properties of silver nanoparticles, increasingly used in consumer goods and for medical and environmental applications. Although nanosilver has effective antimicrobial properties against certain pathogens, overexposure to silver nanoparticles can cause other potentially harmful organisms to rapidly adapt and flourish.

Advertisement

Nanoparticles give major enhancement to polymer solar cells

May 7, 2013 11:11 am | News | Comments

A polymer thin film solar cell (PSC) produces electricity from sunlight by the photovoltaic effect. Though light and inexpensive, PSCs currently suffer from a lack of enough efficiency for large scale applications and they also have stability problems. Researches in Korea have designed and added multi-positional silica-coated silver nanoparticles that have greatly improved stability and performance of these cells.

Scientists make world’s smallest stop-motion film

May 2, 2013 9:22 am | News | Comments

Even without certification by Guinness World Records, it would be easy to believe a short, 250-frame film recently created by an IBM Research team is the world’s smallest. Named “A Boy and His Atom,” the movie was created by precisely placing thousands of atoms using a scanning tunneling microscope. This type of atomic-level control is the result of years of efforts by IBM to determine the lower limits for storing data.

Scientists image nanoparticles in action

April 25, 2013 8:49 am | News | Comments

The macroscopic effects of certain nanoparticles on human health have long been clear to the naked eye. What scientists have lacked is the ability to see the detailed movements of individual particles that give rise to those effects. Scientists at Virginia Tech have invented a technique for imaging nanoparticle dynamics with atomic resolution as these dynamics occur in a liquid environment.

A Close Eye on Nanotechnology

April 24, 2013 12:30 pm | by Lindsay Hock | Articles | Comments

Nanotechnology typically describes any material, device, or technology where feature sizes are smaller than 100 nanometers in dimension. However, this new and uncharted direction in research provides a large spark for new product and drug delivery development. To achieve these discoveries, scientists must rely on specialized instruments and materials to drive their experiments and analysis.

A greener method for making popular nanoparticle

April 24, 2013 10:37 am | News | Comments

Already renowned for its beneficial effects on human health, green tea could have a new role—along with other natural plant-based substances—in a healthier, more sustainable production of silver nanoparticles. According to a recent study, extracts from green tea and other plants could be used as substitutes for toxic materials normally used to make these popular nanoparticles.

Nanoparticle probes could drastically drop cost of two-photon microscopy

April 22, 2013 11:09 am | News | Comments

A dye-based imaging technique known as two-photon microscopy can produce pictures of active neural structures in much finer detail than functional magnetic resonance imaging, but it requires expensive femtosecond lasers to fluoresce existing dyes. A research team at the University of Pennsylvania has developed a new kind dye that fluoresces easily and produces quality images with far less powerful lasers.

Scientists see nanoparticles form larger structure in real time

April 22, 2013 7:57 am | News | Comments

In a new study performed at Argonne National Laboratory, researchers have, for the first time, seen the self-assembly of nanoparticle chains in situ, that is, in place as it occurs in real time. The scientists exposed a tiny liquid “cell” or pouch that contained gold nanoparticles covered with a positively charged coating to an intense beam of electrons generated with a transmission electron microscope.

Study: Nanosilver from consumer products quickly breaks down in water

April 18, 2013 10:07 am | News | Comments

Nanosilver in wastewater can cause severe environmental damage if it occurs as a metal. A study recently conducted in Switzerland. now shows that nanosilver is quickly transformed into less problematic substances on its way to the wastewater treatment plant. In addition, it is efficiently retained in the sewage sludge so that only a small portion of it reaches the water systems.

Black nanoparticles could play key role in clean energy photocatalysis

April 15, 2013 8:32 am | News | Comments

A unique atomic-scale engineering technique for turning low-efficiency photocatalytic “white” nanoparticles of titanium dioxide into high-efficiency “black” nanoparticles could be the key to clean energy technologies based on hydrogen. Samuel Mao leads the development of a technique for engineering disorder into the nanocrystalline structure of the semiconductor titanium dioxide.

GUMBOS technology promises new drugs, electronic devices

April 10, 2013 1:06 pm | News | Comments

Mention a breakthrough involving "gumbo" technology in this city, and people think of a new twist on The Local Dish, the stew that's the quintessence of southern Louisiana cooking. But scientific presentations at a meeting of the world's largest scientific society this week are focusing on what may be an advance in developing GUMBOS-based materials with far-reaching medical, electronic and other uses.

Tin nanocrystals for the battery of the future

April 9, 2013 6:17 pm | by Fabio Bergamin, ETH Zurich | News | Comments

More powerful batteries could help electric cars achieve a considerably larger range and thus a breakthrough on the market. A new nanomaterial made from tiny tin crystals, deployed at the anode of lithium-ion batteries, has been developed in the labs of chemists in Europe and enables considerably more power to be stored in these batteries.

Light may recast copper as chemical industry "holy grail"

March 29, 2013 8:50 am | News | Comments

Wouldn't it be convenient if you could reverse the rusting of your car by shining a bright light on it? It turns out that this concept works for undoing oxidation on copper nanoparticles, and it could lead to an environmentally friendly production process for an important industrial chemical, University of Michigan engineers have discovered.

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading