Articles tagged with Nanoparticles
Researchers at Stanford University have directly observed plasmon resonances in individual metal particles measuring down to one nanometer in diameter. This discovery could lead to advancements in catalytic processes, cancer research and treatment, and quantum computing.
Researchers have developed nanoparticles of chitosan, a natural polysaccharide from shrimp shells, with effective antimicrobial activity against Staphylococcus saprophyticus and Escherichia coli. These nanoparticles also stimulate skin cell growth, enhancing wound healing and potentially leading to anti-aging benefits.
Researchers developed nanoparticles called nanopills to release proteins with therapeutic effects, successfully recovering activity in 'sick' mammalian cells. The technology has been licensed and is being developed by biotech firm Janus Developments.
A recent study by the Norwegian Institute of Public Health found that silver nanoparticles can suppress cellular growth and multiplication, causing cell death depending on concentration and duration of exposure. Titanium dioxide nanoparticles also caused DNA damage but with weaker effects.
Researchers at Binghamton University found that nanoparticles affect the absorption of nutrients like iron, causing disruptions to intestinal function. Chronic exposure leads to changes in intestinal villi size, increasing iron absorption rates.
Scientists discovered that silver nanoparticles effectively kill hard-to-treat yeast infections, including oral thrush and dental stomatitis. The nanoparticles' stability in liquid medium makes them a potential strategy for developing alternative treatments.
Researchers at NIST have created a method to directly correlate particle size, shape, and agglomeration with redox chemical properties of nanoparticles. This allows for the observation of structural changes in nanoparticles during important chemical reactions.
University of Oregon researchers developed new measuring techniques that monitor nanoparticle growth, reducing waste and environmental risks. By using green chemistry approaches, they improved efficiency and stability of nanoparticles.
Research reveals that plastic nanoparticles impact fish feeding behavior and metabolic parameters, including weight loss and cholesterol levels. The findings have implications for assessing nanoparticle risks in aquatic ecosystems.
Researchers developed a three-dimensional living tissue model to study brain tumors and therapeutics, confirming iron-oxide nanoparticles can deliver tumstatin to blood vessels surrounding gliomas. The model allows for testing of agent characteristics in a realistic environment.
Researchers warn that billions of engineered nanoparticles are ingested daily, potentially blocking iron absorption and causing subtle effects on health. The study used chickens as a model to simulate human exposure and found changes in intestinal cell structures.
Researchers used 3D computer simulations to study the diffusional behavior of nanoparticles on surfaces. They found that ordered nanorods can facilitate faster diffusion than disordered ones, with channels between rods enabling particles to speed through.
Researchers developed a nanoparticle microfluidic color device for rapid detection of acute sepsis and other biomarkers, offering improved accuracy and speed in medical diagnostics. The device boasts high sensitivity and can detect minute quantities of biomolecules, making it a promising solution for point-of-care diagnostics.
Scientists at Duke University Medical Center created nanoparticles that target lymph nodes to greatly enhance vaccine responses. The particles mimic natural mast cell granules and provide a timed release of inflammatory mediators, stimulating effective immune reactions in mice vaccinated with the influenza A virus.
A team of researchers from Pitt and UMass proposes a 'repair-and-go' approach to fix malfunctions caused by small-surface cracks on any digital device. This method uses nanoparticles and droplets of oil to repair defects on-site, potentially extending the device's lifetime.
Researchers have successfully penetrated fruit flies' brains with ORMOSIL nanoparticles, which hold promise as a potential vehicle for targeted drug delivery. The particles can be filled with helpful chemical compounds or gene therapies to target neurodegenerative disorders like Alzheimer's disease.
A team of researchers at the University of Notre Dame has created a one-coat solar paint that can be applied to any conductive surface without special equipment. The paint uses semiconducting nanoparticles to produce electricity, offering a potential solution for inexpensive and efficient energy production.
Researchers developed a method to characterize the optical properties of ZnO nanoparticles, allowing them to assess their safety in sunscreen. The study found that nanoparticles did not penetrate beneath the stratum corneum, the topmost layer of skin, after being applied and washed off.
A recent study by Marshall University researchers discovered that nanoparticles of cerium oxide, commonly used in diesel fuels, can travel from the lungs to the liver and cause damage. The study found a dose-dependent increase in cerium levels in the liver, associated with liver enzyme elevations and histological evidence of liver damage.
The Singapore research team led by Associate Professor Xiaogang Liu developed a synthesis of lanthanide-doped core-shell nanocrystals with advanced optical properties, enabling efficient upconversion and tunable light emission. This breakthrough has significant implications for cancer detection, medical imaging, and therapeutic delivery.
Researchers developed a gelatin-based drug-delivery system that can quickly restore blood flow by activating tissue plasminogen activator (tPA) in blood clots. The treatment, which uses soundwaves to reactivate tPA once it reaches the clot, shows promise for treating patients with chest pain en route to the hospital.
Physicists from the University of Constance used computer simulations to study shape memory materials down to the nanoscale. They found that the material's atomic-scale crystal structure shifted as the temperature increased, triggering a structural phase transition.
Green algae exposed to carbon nanotubes exhibit reduced growth rates and photosynthetic activity, primarily caused by increased shadowing and agglomeration. However, the absence of absorption by the plants indicates that CNTs do not pose a direct toxic threat.
Researchers studied the relaxation dynamics of 2D nanoparticle systems, which exhibit unusual slow relaxation and aging effects due to their unique structures. The study used a novel approach to measure surface pressure in two directions, revealing complex relaxation mechanisms.
Scientists discover miniscule metal nanoparticles naturally occurring in silver articles, jewelry, and utensils, revealing a dynamic behavior that changes over time. This finding challenges traditional views on nanoparticle toxicity and suggests humans have been exposed to these particles for millennia.
Researchers can create new materials with distinct electrical, optical, and mechanical properties using self-assembly processes. These developments have the potential to tackle challenges in catalysis, medical sensing, and other fields.
Researchers used computer simulations to show the effectiveness of an alternative method for molecular depth profiling. The study found that combining buckyball bombardment with low-energy argon creates a smoother surface, allowing for clearer analysis of molecular arrangement. This technique has potential applications in studying huma...
Scientists investigate whether diesel nanoparticles are affecting bees' brains, causing them to lose their way back to the hive. The study aims to understand how tiny particles in diesel fumes could be contributing to bee colony collapse, which has economic and ecological implications for global pollination.
Scientists at Sanford-Burnham and Salk Institute developed a method to combine peptides and nanoparticles to eliminate glioblastoma in previously untreatable mouse models. The nanosystem proved effective in treating two different mouse models, curing most tumors and significantly delaying tumor development.
Researchers at Delft University of Technology found that smaller metal alloy nanoparticles release hydrogen gas more quickly when stored in a metal hydride. This could lead to more efficient hydrogen storage for fuel cells.
Researchers at Delft University of Technology have developed a cheap and efficient quantum dot solar cell by understanding electron movement in linked semiconductor nanoparticles. The discovery was published on Nature Nanotechnology, paving the way for more sustainable energy solutions.
A new type of nanoparticle has been developed to deliver chemotherapy drugs more effectively, with a high drug loading capacity and controlled release. The nanoparticle demonstrated significant growth inhibition of pancreatic tumors, showing up to three times higher therapeutic efficacy than traditional chemotherapy drugs.
Scientists have found that nanoparticles can cause brain injury in fish, leading to the formation of vacuoles and nerve cell death. The results may influence policy regulations on environmental protection and human safety.
Researchers found that low concentrations of carbon nanoparticles can cause leakage in the cellular lining of the renal nephron, leading to potential harm. The study highlights the need for further research into the effects of CNPs on human health and the environment.
Researchers develop a new collector technology using water-repelling nanoparticles to recover gold, silver, and copper from waste rock. The process achieves near-100% recovery rate in laboratory experiments.
A team of researchers has discovered a thermodynamically stable RNA nanoparticle that can serve as a platform for building larger, multifunctional nanoparticles. This breakthrough could lead to new therapeutic applications in treating cancers and viral infections.
Researchers at Penn State University have invented a method using magnetic fields to purify hybrid nanoparticles, which are composed of two or more kinds of materials. This technique will help improve drug-delivery systems, drug-targeting technologies, medical-imaging technologies, and electronic information-storage devices.
The discovery reveals changes in silicon's mechanical response with decreasing size, driving unexpected deformation mechanisms. This finding provides a basis for understanding the onset of plasticity in nanovolumes, benefiting nano-device design.
Researchers at the University of Michigan have discovered a generic mechanism for creating near-perfect nanoparticles that assemble into uniform structures. The breakthrough enables the formation of clusters with desirable properties, such as size, shape, and electrical conductivity.
New research from Brown University finds that nickel nanoparticles can activate a cellular pathway that contributes to cancer in human lung cells. The study shows that smaller nanoscale particles are more harmful and potentially cancer-causing than larger microscale particles.
Researchers at Syracuse University have developed tunable nano-suspensions capable of capturing specific wavelengths of sunlight, paving the way for improved solar energy efficiency and smart glass technologies. By manipulating the composition of the suspension, scientists can achieve optimal optical properties.
Scientists have developed a new heart model to investigate the effects of artificial nanoparticles on cardiac function. Exposure to certain types of nanoparticles led to increased heart rates, cardiac arrhythmia, and modified ECG values typical of heart disease.
Scientists have successfully used camel blood-derived nanobodies to target and kill cancer cells expressing specific markers. The approach involves attaching the nanobodies to nanoparticles that deliver a killer gene, preventing non-specific cell killing and improving safety.
Researchers have found that human Sertoli cells can proliferate in vitro and retain their functionality, making them suitable for therapeutic applications. The cells have also been successfully used as delivery systems for therapeutics in the deep lung areas, potentially providing an effective treatment alternative.
Researchers have developed a novel gene therapy system using nanoparticles that can be freeze-dried and stored for up to three months. The technology shows promise in treating brain cancer with high efficacy and minimal risk of complications, offering a potential alternative to traditional therapies.
Researchers at UC San Diego developed a method to disguise nanoparticles as red blood cells, allowing them to evade the immune system and deliver cancer-fighting drugs directly to tumors. This breakthrough could lead to more personalized drug delivery, reducing the risk of immune response.
Researchers create the world's first three-dimensional plasmon rulers, capable of measuring spatial changes in macrmolecular systems, providing a new tool for understanding critical biological events. The 3D plasmon rulers enable scientists to retrieve complete spatial configuration and track dynamic evolution of complex processes.
Researchers have developed Cornell Dots, ultra-small particles that can light up cancer cells. The technology enables visualization during surgical treatment and shows invasive or metastatic spread to lymph nodes and distant organs.
The new nanoparticles can carry hundreds of light-sensitive molecules, creating more reactive oxygen species from the same amount of light. This design allows the nanoparticles to penetrate easily into tumors and deliver targeted damage to cancer cells.
A recent literature review analyzed nearly 100 scientific articles on the effects of nanoparticles on edible plants. The study found that nanoparticle uptake and build-up vary depending on plant type, nanoparticle size, and chemical composition, highlighting a need for further research in nanoecotoxicology.
Physicists at the University of Michigan have successfully created 3D arrays of optically induced crystals using laser beams. The technique allows for the formation of crystalline structures without the need for X-ray crystallography, which is commonly used to analyze biological molecules.
Researchers found that carbon black nanoparticles activated a double source of inflammation in the lungs, causing immune cells to die and leading to a secondary inflammatory response. The study suggests environmental exposures to diesel exhaust or printer ink could contribute to lung inflammation.
Researchers at Berkeley Lab demonstrated antenna-enhanced gas sensing at the single particle level using a palladium nanoparticle on a gold nanoantenna. The technique amplifies plasmonic sensing signals, eliminating statistical characteristics and offering noninvasive, biocompatible applications.
Researchers create engineered mesoporous silica nanoparticles that improve drug delivery to tumors, increasing particle retention by up to 10% and reducing systemic side effects. The optimized platform achieves significant increases in doxorubicin delivery, inducing tumor shrinkage and apoptosis while improving safety profiles.
MIT scientists have designed a new type of nanoparticle that can target nearly any type of tumor by utilizing the acidic environment shared by most cancers. The particles are designed to break down in the slightly more acidic environment near a tumor, revealing another layer that can penetrate individual cells.
Scientists have developed a new imaging agent using tantalum oxide nanoparticles, which stays in the body long enough to image multiple organs. The material is inexpensive and has shown promising results in laboratory tests, potentially overcoming limitations of existing imaging agents.
Engineered gold nanoparticles have been shown to be non-toxic when administered by two alternative routes in mice, suggesting they may be safe for human use. The particles are designed to detect cancer-lesion sites with high sensitivity and could lead to early disease detection.
University of Cincinnati researchers have successfully produced large RNA nanoparticles using a bipartite approach, overcoming challenges in industry-scale production. The nanoparticles, containing small interfering RNA, show a half-life of between five and 10 hours in animal models, are non-toxic and produce no immune response.
Researchers have created nanoparticles that can store large amounts of drugs, allowing for a millionfold increase in efficiency over comparable methods. The 'protocells' can target specific cancer cells while restricting toxic chemotherapy drugs from leaking into the system, mitigating side effects.
A new study from North Carolina State University finds that the general public perceives nanoparticles as a relatively low risk, with 60% of respondents viewing them as posing only a slight health risk or none at all. The study compared public perceptions of nanoparticle risks to other environmental and health safety risks.