Platinum-rich shell, platinum-poor core
A team of researchers developed a new class of electrocatalyst that outperforms pure platinum in reducing oxygen. The catalyst features nanoparticles with a platinum-rich shell and a copper-cobalt core.
Nanoparticles
Articles tagged with Nanoparticles
Nanoparticle exposures happen, says expert
Engineered nanomaterials can still penetrate deep inside the body, posing a risk to human health. The science suggests that exposures will occur, and understanding toxicity is crucial for resolving concerns about potential harm.
SourceWoodrow Wilson International Center for Scholars/Science and Technology Innovation Program·DateOct 11, 2007
Developing a modular, nanoparticle drug delivery system
Eva Harth's system delivers drugs to specific intracellular compartments, including the brain, and reaches tumors in the lungs, brain, and spinal cord. It also enables delivery of peptides, proteins, DNA, and smaller chemical compounds.
Nanotech could make solar energy as easy and cheap as growing grass
Researchers are exploring nanoscale materials to mimic the architecture of grass and photosynthesis for efficient solar energy production. Tiny nanoparticles can be embedded in everyday products like house paint and roof tiles to create sustainable solar cells.
SourceWoodrow Wilson International Center for Scholars/Science and Technology Innovation Program·DateSep 17, 2007
New nanoparticle vaccine is more effective but less expensive
Researchers at EPFL have developed a nanoparticle vaccine that delivers vaccines more effectively with fewer side effects, at a fraction of the cost. The technology targets dendritic cells to trigger a strong immune response, and has potential applications for diseases like hepatitis and malaria.
Two nanostructures are better than one
UWM researchers have devised a method for creating hybrid structures by coating CNTs with aerosol nanoparticles, producing low-cost
Novel 3-D cell culture model shows selective tumor uptake of nanoparticles
A novel 3D cell culture model has been developed to study the selective uptake of nanoparticles in brain tumors. The model uses a combination of tumor aggregates and normal brain tissue slices, allowing researchers to investigate tumor cell invasion into brain tissue.
SourceSociety for Experimental Biology and Medicine·JournalExperimental Biology and Medicine·DateAug 23, 2007
Clemson scientists shed light on molecules in living cells
Researchers at Clemson University have created a method to improve fluorescent nanoparticle longevity, enabling the tracking of molecule motion in living cells. This technology could reveal details on virus invasion and protein operation within the body.
Silicon nanoparticles enhance performance of solar cells
Silicon nanoparticles can significantly enhance the performance of solar cells by improving power output and reducing heat. By integrating a high-quality film of silicon nanoparticles onto silicon solar cells, researchers achieved a 60% improvement in power performance in the ultraviolet range of the spectrum.
SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalApplied Physics Letters·DateAug 20, 2007
New nanoparticle could provide simple early diagnosis of many diseases
Researchers at Georgia Tech and Emory University developed a nanoparticle that can detect and image trace amounts of hydrogen peroxide in animals. This innovation could lead to the creation of a simple diagnostic tool for detecting early stages of various diseases.
Nanoparticle technique could lead to improved semiconductors
Researchers developed a single-particle technique to study small portions of semiconductor material at the nanoscale. The study found that 'deep traps' are formed in plastic semiconductors, which can decrease efficiency and cause defects. This breakthrough could lead to improved devices made from these materials.
Under magnetic force, nanoparticles may deliver gene therapy
Researchers have developed a biodegradable nanoparticle delivery system that uses magnetic forces to target specific cells in the body. The system has shown promise in reducing cell proliferation and delivering anti-growth genes to stents, which could help maintain blood flow.
Tightly packed molecules lend unexpected strength to nanothin sheet of material
Researchers at the University of Chicago and Argonne National Laboratory have created a nanothin sheet of nanoparticles that boasts surprising strength, rivalling that of an ultrathin sheet of plexiglass. The material's characteristics make it a promising candidate for use in pressure sensors and chemical filters.
Nanoparticles hitchhike on red blood cells: a potential new method for drug delivery
Researchers have discovered that attaching polymeric nanoparticles to red blood cells increases their in vivo lifetime. This breakthrough could lead to new treatments for cancer, blood clots, and heart disease by providing sustained release of drugs.
SourceSociety for Experimental Biology and Medicine·JournalExperimental Biology and Medicine·DateJun 27, 2007
Nanotech hitchhikers in blood
Researchers at UCSB discovered a method to extend nanoparticles' in vivo lifetime by attaching them to red blood cells, potentially revolutionizing drug delivery. The attachment allows particles to evade phagocytosis and remain in circulation for up to 120 days.
SourceUniversity of California - Santa Barbara·JournalExperimental Biology and Medicine·DateJun 27, 2007
UCF nanoparticle offers promise for treating glaucoma
Researchers have developed a unique nanoparticle that can safely deliver a compound to the eye, blocking an enzyme that contributes to glaucoma. This non-toxic tool offers high penetration rates and little patient discomfort, making it a promising treatment option.
Microbes at work cleaning up the environment
Researchers at Lawrence Livermore National Laboratory discovered that certain bacteria excrete proteins that aggregate metal nanoparticles, reducing their toxicity and mobility. This phenomenon could lead to the development of protein-based methods for cleaning up polluted environments on a larger scale.
In nature, proteins sweep up nanoparticles
Scientists discovered bacteria in a flooded mine emit proteins that accumulate and trap metal nanoparticles, forming large aggregates that reduce mobility. This process may lead to new bioremediation strategies for toxic metals like arsenic and lead.
Bacteria ferry nanoparticles into cells for early diagnosis, treatment
Researchers at Purdue University have developed a method to deliver nanoparticles into cells using bacteria, enabling precise positioning of sensors, drugs, or DNA. This approach overcomes hurdles in delivering cargo to cell interiors, offering potential for gene therapy and disease detection.
UCLA researchers develop new nanomaterials to deliver anti-cancer drugs to cells
Researchers at UCLA have successfully manipulated nanomaterials to create a new drug-delivery system for anticancer drugs. The system uses silica-based nanoparticles to deliver water-insoluble drugs into human cancer cells, increasing their effectiveness and reducing toxicity.
Better insight into brain anatomical structures
Researchers have developed a new, biocompatible MRI contrast agent using manganese oxide nanoparticles that produces clear images of mouse brains. The agent allows for high-contrast views of brain anatomy and has potential applications in diagnosing brain diseases such as Alzheimer's and Parkinson's.
Nanomedicine opens the way for nerve cell regeneration
Researchers use nanotechnology to enhance nerve cell regeneration, bypassing inhibitory environments. Magnetic nanoparticles create mechanical tension, while aligned nanofibers provide a bioactive matrix for growth.
Targeted nanoparticles incorporating siRNA offer promise for cancer treatment
Researchers have developed targeted nanoparticles incorporating siRNA that can slow tumor growth without eliciting toxicities. The nanoparticles' structure and biological function are characterized using physicochemical and biological methods, offering insights into designing more effective carriers.
Iowa State scientists demonstrate first use of nanotechnology to enter plant cells
Researchers developed a method to penetrate plant cell walls using nanotechnology, enabling simultaneous delivery of DNA and chemicals. This breakthrough enables precise control over gene expression in plants, opening up new possibilities for agricultural biotechnology.
MU researchers examine the environmental effects of silver nanoparticles
Researchers at the University of Missouri-Columbia are studying the effects of silver nanoparticles on wastewater treatment systems. The study aims to determine how these particles interact with bacteria used for water purification and assess their potential environmental impact.
Work with nanoparticles may lead to 'on-the-spot' virus detector
Researchers at the University of Buffalo have developed a device that can rapidly detect infectious viruses in biological samples. The innovation uses nanoparticles to transport viral particles to specific locations, allowing for quick detection and paving the way for an 'on-the-spot' virus detector.
Cancer tip -- Nanoparticles can damage DNA, increase cancer risk
Researchers at the University of Massachusetts have found that nanoparticles can cause DNA damage in breast cancer cells, increasing the risk of cancer. The study suggests that smaller particles are more likely to enter cells and cause toxicity, highlighting the need for further research on nanoparticle safety.
Little lifesavers -- Nanoparticles improve delivery of medicines and diagnostics
A Princeton University-led research team has developed nanoparticles that can deliver medicine deep into the lungs or infiltrate cancer cells while leaving normal ones alone. The particles are too large to pass through normal cells but can target rapidly growing solid tumors and remain in the lungs, maximizing the effectiveness of inha...
Novel experiments on cement yield concrete results
A team of researchers from NIST and Northwestern University used advanced techniques to classify water in cement, distinguishing between physically bound and adsorbed water. This discovery has significant implications for predicting concrete properties and improving its durability.
SourceNational Institute of Standards and Technology (NIST)·JournalNature Materials·DateMar 30, 2007
Widely used iron nanoparticles exhibit toxic effects on neuronal cells
Researchers at UC San Diego discovered that iron oxide nanoparticles can be toxic to nerve cells and interfere with their signal-transmitting extensions. The nanoparticles were initially investigated as a possible way to manipulate nerve cells remotely with magnetic force.
Nanoparticles can track cells deep within living organisms
Researchers developed nanoparticles that can label and track stem cells used in medical treatments, offering a new way to monitor tumors and diagnose cardiovascular problems. The technology uses MRI scanning to detect the presence of labeled cells, allowing for more accurate measurements and better understanding of each cell type's role.
Test finds manufactured nanoparticles don't harm soil ecology
Researchers at Purdue University found that adding manufactured fullerenes to soil had no adverse effects on microorganisms or soil function. The study's results provide baseline data for future research on the impact of various types and sizes of nanomaterials on the environment.
Nano coalition launches virtual journal on risk research
The Virtual Journal of Nanotechnology Environment, Health & Safety (VJ-Nano EHS) offers the most comprehensive knowledge base on peer-reviewed information focusing on nanomaterial impacts available to-date. ICON's online journal improves access to scientific findings on the benefits and risks of nanomaterials.
U of M to lead 6-university effort to use biology to advance quantum physics and electronics
A team of 9 scholars from six universities will use precise biological assembly techniques to study quantum physics in nanoparticle arrays. This research could lead to new mechanisms for computing, signal processing and sensing.
6 universities collaborate to study biologically assembled quantum electronic systems
A team of researchers from six universities, led by the US Department of Defense, is awarded $6 million to explore precise biological assembly for studying quantum physics in nanoparticle arrays. This research aims to produce fundamental understanding of quantum electronic systems and could impact future electronics.
First direct electric link between neurons and light-sensitive nanoparticle films created
Scientists at UTMB and University of Michigan develop direct electrical link between nerve cells and photovoltaic nanoparticle films, enabling light-stimulated nerve-signaling devices. This breakthrough could lead to creation of a nanoparticle-based artificial retina with unprecedented flexibility, compactness, and reliability.
Peanut-shaped nanostructures
Japanese scientists produce peanut-shaped nanoparticles comprising two different sulfur-containing substances, palladium sulfide and cobalt sulfide. The unique structure gives rise to different physical and chemical properties.
Scientists create dual-modality microbeads to improve identification of disease biomarkers
Researchers created dual-modality microbeads to identify disease biomarkers, allowing for faster and more efficient detection of viruses and proteins in human blood and urine. The new technology can analyze very low concentrations of target molecules, enabling diagnosis of diseases like Alzheimer's with high sensitivity.
MIT develops nanoparticles to battle cancer
Researchers at MIT have created nanoparticles that mimic blood platelets to target cancer tumors. These particles can be used for non-invasive imaging of fast-growing cancer hot spots in tumors, as well as delivering chemotherapy directly into the tumor.
SourceMassachusetts Institute of Technology·JournalProceedings of the National Academy of Sciences·DateJan 31, 2007
Researchers probe health and safety impacts of nanotechnology
Scientists probe the effects of nanotechnology on living cells, organisms, and the environment. Researchers like Maria Palazuelos test aluminum nanoparticles' absorption by cells, while others investigate copper nanoparticles' toxicity in fish. The goal is to understand nanoparticle-cell interactions to inform regulatory decisions.
Magnetic, luminescent nanoparticles set new standard
Researchers at UC Davis have created luminescent, magnetic nanoparticles that can be used for tests of environmental pollution and contamination in food products. The particles can also be labeled with antibodies or DNA for genetic analysis, and have the potential to revolutionize medical diagnostics.
Coated nanoparticles solve sticky drug-delivery problem
Researchers at Johns Hopkins University have developed a way to coat nanoparticles with a chemical that helps them slip through the body's protective mucus barrier. This breakthrough could lead to more effective treatments for diseases like cancer and infections, delivered directly to affected areas without unwanted side effects.
SourceJohns Hopkins University·JournalProceedings of the National Academy of Sciences·DateJan 24, 2007
Research advances on nanotech workplace health and safety
Researchers have made progress in nanotech workplace safety, including new instrumentation and innovative exposure control methods. However, critical questions about worker safety remain unanswered, highlighting the need for further study to ensure safe nano-workplaces today and in the future.
SourceWoodrow Wilson International Center for Scholars/Science and Technology Innovation Program·DateJan 16, 2007
Nanotechnology shows promise as next wrinkle fighter
Researchers at Michigan State University have discovered that nanoparticles can stop thin polymer films from buckling and wrinkling, paving the way for new solutions to prevent wrinkles. The technology has potential applications in cosmetic procedures and medical treatments.
Homing nanoparticles pack multiple assault on tumors
Researchers developed nanoparticles that home in on tumors by mimicking the clotting action of platelets, blocking up to 20% of tumor blood vessels. This system enables self-amplification of tumor targeting, leading to enhanced imaging and therapeutic delivery.
Repetitive motion speeds nanoparticle uptake
Repetitive motion speeds nanoparticle uptake through the skin, according to a study by researchers at Rice University. The team found that flexing the skin increases nanoparticle penetration and depth, with more buckyballs taken up after 24 hours.
Mayo Clinic study explores link between nanoparticles and kidney stones
Researchers at Mayo Clinic isolated nanoparticles from human kidney stones in cell cultures, identifying proteins, RNA, and DNA linked to nanoparticles. The findings suggest that nanoparticles may play a role in the development of kidney stones.
MIT implant could measure tumor growth, treatment
The MIT implant, containing iron oxide-coated nanoparticles, can detect metabolites associated with tumor growth and track chemotherapy drug effects. It provides a rapid measure of treatment efficacy, helping doctors determine whether a treatment is working in a particular patient.
Protein's tail may be flu virus's achilles heel
Researchers at Rice University and UT Austin have identified a promising antiviral drug target in the long, flexible tail of the nucleoprotein protein. Minor changes to this region prevent the protein from fulfilling its role in structural columns that transmit viral copies.
3-D X-ray images of nanoparticles
The new X-ray microscope resolves details down to 17 nanometers, allowing for the study of quantum dots and other nanomaterials in three dimensions. This technique opens up comprehensive imaging capabilities for various samples, including porous materials, semiconductors, and biomaterials.
'Nanorust' cleans arsenic from drinking water
Researchers at Rice University's Center for Biological and Environmental Nanotechnology have developed a revolutionary, low-cost technology to clean arsenic from drinking water. The nanorust technique reduces arsenic levels in contaminated water to below EPA thresholds, offering a sustainable solution for millions of people worldwide.
Interdisciplinary grant to Yale: Creating nanodevices for delivery of vaccines
A team of Yale biomedical engineers and cell biologists received a $1-million grant to create smart nanoparticles for vaccine delivery. They aim to develop materials that mimic biological vectors, evading normal barriers and stimulating antigen-presenting cells.
Researchers make nanosheets that mimic protein formation
University of Michigan researchers successfully assembled nanoparticles into free-floating sheets using cadmium telluride crystals, a material used in solar cells. The discovery establishes a key connection between proteins and nanoparticles, enabling the development of novel materials for drug delivery, energy, and more.
Nanocrystals are hot
Researchers discovered that germanium nanocrystals in silica glass don't melt until temperatures rise nearly 200 degrees Kelvin above the melting point of bulk germanium. The nanocrystals also require more than 200 K below the bulk melting point to resolidify.
Particle size matters to bacteria ability to immobilize heavy metals
Researchers discover that bacteria prefer larger nanoparticles to smaller ones for efficient metal reduction. The study reveals a 10-fold difference in bioreduction rates among particles of similar shape but different sizes, with larger particles being reduced faster than smaller ones.
Electric jolt triggers release of biomolecules, nanoparticles
Johns Hopkins researchers create a technique to release biomolecules and nanoparticles from a tiny gold launch pad using an electric pulse, enabling controlled release of medication or materials.
Nanotechnology propels advances in regenerative medicine research
Researchers develop nanotubes to enhance adult stem cells' ability to differentiate into neurons in stroke-damaged rat brains. Additionally, nanoparticles promote formation of blood vessels and boost cardiovascular function after heart attacks.
New methods for screening nanoparticles
Scientists at Brookhaven Lab developed a screening method to examine nanoparticle interactions with human cells, revealing toxic effects of carbon-based materials. The method uses in vitro laboratory studies and sophisticated imaging methods to gather information about cell responses to nanoparticles.
Nanotechnology enables low-dose treatment of atherosclerotic plaques
Researchers developed nanoparticles to target atherosclerotic plaques with low doses of fumagillin, reducing new blood vessel growth by 60-80%. This technique may enable effective treatment at lower doses for drugs with high side effects.
Oscillating pattern in nanoparticle crystallization
Researchers from Max Planck Institute in Potsdam have discovered an oscillating pattern in nanoparticle crystallization and self-organization. The study shows that these systems can form complex patterns, including concentric circles, through a combination of chemical reactions and diffusion.