Articles tagged with Gold Nanoparticles
Researchers have successfully imaged gold nanoparticles at atomic resolution using high-resolution electron microscopy, revealing a crystalline structure with 68 gold atoms. The breakthrough opens the way for understanding and practical applications of nanoparticle structures.
Researchers have identified a mechanism by which tiny gold particles can fuse with cell membranes without damaging cells. This discovery suggests possible strategies for designing nanoparticles that could get into cells more easily.
Shanghai researchers create a new antibacterial material by coating titanium with gold nanoparticles, which effectively kills bacteria and promotes bone growth. This innovative approach may lead to improved implant surfaces and reduced surgical complications.
Researchers at UC Riverside developed a high-resolution pressure sensor that changes color according to stress levels, providing vital information for engineers designing safer automobiles. The technology also has applications in improving everyday devices like smartphones.
A Northwestern University research team successfully built near-perfect single crystals out of nanoparticles and DNA, transforming disordered materials into orderly crystal structures. The technique, developed by Chad Mirkin and Monica Olvera de la Cruz, holds promise for novel technologies and new industries.
Researchers from Brown University have developed a catalyst using gold nanoparticles that selectively converts CO2 to carbon monoxide, an active molecule for making alternative fuels and commodity chemicals. The team found that particles with an exact size of eight nanometers achieved the best selectivity, converting 90% of CO2 to CO.
Gold nanoparticles with special coatings can deliver drugs or biosensors to a cell's interior without damaging it. Researchers have figured out how the process works, including the crucial first step of fusing with lipids in the cell wall.
Researchers developed a novel DNAzyme-gold nanoparticle test to detect dengue virus in mosquitoes, detecting as little as 10 viruses per sample. The assay is stable at high temperatures and can be easily transported and used in remote regions.
A new composite nanoparticle material, silica nanorattles @ gold nanoparticles (SN @ GNs), has been developed for biological imaging. The silica shell reduces the toxicity of gold nanoparticles, increasing their maximum tolerated dose to 200 mg/kg. This innovation provides a promising approach for cancer diagnosis and treatment.
Researchers at Virginia Tech Carilion Institute invent technique to image nanoparticle dynamics with atomic resolution in a liquid environment. The new method allows visualization of nanoscale processes, such as nanoparticle engulfment into cells.
Researchers at NIST have developed a way to predictably increase or decrease the intensity of quantum dot fluorescence by using DNA templates and controlling distances between gold nanoparticles. This breakthrough enables potential applications in photodetectors, chemical sensors, and nanoscale lasers.
Rice University researchers have found a way to selectively heat diverse nanoparticles using short laser pulses. They demonstrated the effect in common gold nanoparticles, nanoparticle clusters, and mixed nanorods and nanoshells, showing narrow photothermal spectra and spectral selectivity.
Researchers have successfully synthesized fluorescent gold nanoparticles within human hair for potential use in hair dyeing, electronic sensors, and medical diagnostic tests. The gold particles were formed inside the hair's central core cortex after soaking white hairs in a solution of a gold compound.
Researchers at the University of Missouri have developed a new gold nanoparticle treatment for prostate cancer that uses radioactive gold nanoparticles. The treatment has shown to be safe and effective in dogs, which are the only other mammal to naturally contract aggressive prostate cancer, making it a promising lead for human trials.
Researchers at the University of Illinois have discovered a DNA 'genetic code' that can shape gold nanoparticles into various forms, such as hexagons, stars, and discs. The code is based on the sequence of four DNA bases - A, T, G, and C - which bind to different facets of gold nanoseeds and direct their growth pathways.
Researchers report the first structural study on the atomistic processes of a ligand-exchange reaction in well-defined gold nanoparticles. The study reveals that only 4 sites out of 44 possibilities showed occupation by the exchanged ligand, providing insight into the highly heterogeneous structure of the overlayer.
Researchers have found a new treatment for prostate cancer using gold nanoparticles produced from chemicals in tea leaves, reducing tumors by 80 percent and requiring doses thousands of times smaller than chemotherapy. The nanoparticles are attracted to tumor cells and destroy them efficiently.
Gold nanoparticles with a slight positive charge have been found to unravel DNA's double helix, enabling potential breakthroughs in gene therapy. The research also highlights the importance of characterizing nanoparticle characteristics for DNA-based electronics.
The researchers found that larger ligands produce smaller gold nanoparticles and that each type of ligand produces nanoparticles in a particular array of discrete sizes. This discovery advances the understanding of nanoparticle formation and provides a new tool for controlling the size and characteristics of gold nanoparticles.
Researchers at Rice University have created a way to print fine lines of gold nanoparticles on glass, allowing them to transmit signals over long distances using dark plasmons. This breakthrough enables efficient energy transfer on the micrometer scale, potentially improving optoelectronic devices.
Carnegie Mellon researchers successfully used NMR to determine the structure of infinitesimal gold nanoparticles, revealing their handedness. This approach offers a significant advantage over routine methods for analyzing gold nanoparticles and holds promise for developing safer, more effective drugs.
The NIST team uses analytical ultracentrifugation to simultaneously sort and measure light absorption of nanoparticle clusters by size. This allows for the measurement of individual cluster sizes without being confounded by other components, enabling more accurate experiments in EHS and biosensors research.
Researchers at Duke University propose harnessing gold nanoparticles' unique optical properties to flag brain tumors. The team synthesized rod-shaped nanoparticles with varying sizes, which displayed different optical properties and could be tuned to scatter specific light frequencies.
UCLA researchers have developed a plasmonic-enhanced polymer tandem solar cell that improves power conversion efficiency from 5.22% to 6.24%, thanks to the incorporation of gold nanoparticles. The enhancement effect is attained through local near-field enhancement, showing great potential for future development.
Researchers have created a uniform, controllable core-shell nanoparticle that can be made-to-order with precise shape and size. This nanoparticle testbed enables the study of controlled variations in biological systems, facilitating the development of better nanomaterials.
A team of researchers from Brown University has developed a new technique using gold nanoparticles to detect liver cancer at early stages. The approach uses X-ray scatter imaging to spot tumor-like masses as small as 5 millimeters, which is significantly smaller than the current detection limit of about 5 centimeters.
Christine Aikens, assistant professor of chemistry at K-State, has received the two-year $50,000 award to support her research on sustainable energy and gold nanoparticles. The fellowship will allow her group to study fundamental problems not funded by other sources.
Researchers have created a novel crystal lattice composed of gold nanoparticles and viral particles held together by strands of DNA. The structure demonstrates the potential to combine materials with different properties to create infinitesimal devices.
Researchers at the University of Missouri have developed a method to create gold nanoparticles using cinnamon, replacing toxic chemicals and reducing environmental impact. The process utilizes no electricity and toxic agents, making it a more sustainable approach for healthcare products and pharmaceuticals.
Researchers developed a new, ultra-simple method to create nanoscale gold coatings using liquid toluene and gold nanoparticles. The process produces monolayers of gold on various surfaces in just 10 minutes without post-synthesis cleaning.
A fast and efficient detection method for melamine in dairy products has been developed by the University of Miami researchers using gold nanoparticles. The new method can detect melamine within seconds and is completed in under 15 minutes.
Researchers at Georgia Institute of Technology have developed a system using gold nanoparticles that can kill cancer cells by targeting their nuclei, preventing cell division and inducing apoptosis. This breakthrough offers a promising treatment for cancers in areas inaccessible to traditional laser-based therapies.
Researchers have created a new class of ultra-sensitive nanoscale devices capable of detecting the vibrations of individual gold nanoparticles. By studying bipyramid-shaped nanoparticles with highly uniform sizes and shapes, scientists overcame previous limitations in understanding damping in these systems.
Researchers at Northwestern University have successfully designed synthetic HDL, a nanoparticle version capable of irreversibly binding cholesterol. The study shows that the synthetic HDL mimics natural HDL's surface composition and could one day help fill the gap in useful therapeutics for raising good cholesterol.
Researchers from Lehigh University and Cardiff University have identified gold nanoparticles triggered by bilayer clusters as responsible for the critical CO oxidation reaction. The discovery could help protect hydrogen fuel cells and firefighters entering burning buildings.
Researchers have identified natural gold nanoparticles in Western Australia's groundwater, providing new insights into geological processes and potential gold deposits. The discovery could aid explorers in finding new gold deposits due to the unique properties of these nanoparticles.
Kattesh Katti's breakthrough discovery uses gold salts, soybeans and water to produce gold nanoparticles with major applications in cancer detection, electronics and medicine. The environmentally-friendly process could have significant implications for the future of nanotechnology.
A team of researchers at the University of Missouri-Columbia has discovered a clean process for making gold nanoparticles using gold salts, soybeans, and water. The new process eliminates the need for synthetic or man-made chemicals, which can have negative environmental impacts.
Researchers have successfully used a nanofountain probe to directly deposit gold nanoparticles, 15 nanometers in diameter, onto silicon substrates. This novel technique enables better control over resultant patterns and simplifies the fabrication of functional structures.
Researchers demonstrate ability to attach gold nanoparticles to proteins, forming protein-gold arrays for deciphering protein structures, identifying functional parts, and targeted drug delivery. Applications include catalysts for biomass energy conversion and precision vehicles for tumor targeting.
Scientists at Northwestern University developed a simple method to detect mercury using gold nanoparticles and DNA. The technique can identify mercury levels in water samples by visual inspection, offering a faster and more convenient alternative to existing detection methods.
Researchers at the University of Missouri-Columbia have found that a plant extract can be used to stabilize gold nanoparticles, making them nontoxic and stable enough for injection or oral administration. This breakthrough has the potential to revolutionize cancer detection and treatment using nanomedicine.
Researchers at JILA demonstrated that gold nanoparticles can be trapped and detected six times more easily than polystyrene particles of similar size. However, the high heating effect could damage molecules under study, limiting their use in temperature-sensitive experiments.
Researchers at Ohio University have discovered that gold nanoparticles can heat an area significantly larger than the nanoparticle itself, making them useful for targeting specific cells or objects. The particles' heating properties are precise and can be controlled using bio-linkers to affect specific targets.
Researchers have discovered a potential treatment for Alzheimer's disease by combining gold nanoparticles with microwave radiation. The approach breaks up beta amyloid fibrils and reduces protein re-aggregation, offering hope for other neurodegenerative diseases like Parkinson's and Huntington's.
A team of researchers developed fine-tunable carbon-supported gold catalysts that can achieve selective hydrocarbon oxidation under mild conditions. The catalysts enable the conversion of unsaturated hydrocarbons to oxygen-containing organic compounds with higher yields and environmental friendliness.
Gold nanoparticles have shown to detect cancer cells with 600% greater affinity, using a technique that doesn't require expensive equipment or lasers. The method uses an antibody bound to the particles to target cancer cells, allowing for instant detection and non-toxic results.
Researchers at Georgia Institute of Technology and University of California, San Francisco discovered that gold nanoparticles can bind to cancer cells using an antibody, making detection easier. The technique has a 600% greater affinity for cancer cells than noncancerous cells and doesn't require expensive microscopes or lasers.
Researchers at Stanford University created a simple and inexpensive sensor to determine protein conformation changes using gold nanoparticles. The new test turned out to be useful in detecting conformational changes in proteins, which could help identify disease-related proteins like antibodies.
Researchers have successfully used alfalfa plants as miniature factories to extract and store gold nanoparticles, offering a potential alternative to harsh chemical methods. The process uses the plant's natural physiological need to extract metals from its growth medium.
Researchers have successfully used alfalfa plants to extract gold nanoparticles from the soil, a breakthrough that eliminates the need for harsh chemicals. The study published in Nano Letters demonstrates the potential of using plants as tiny factories to produce gold nanoparticles.
Researchers developed a new material by attaching gold nanoparticles to a sticky molecule gradient, enabling efficient processing and high-throughput testing. The material can be used as a filter, sensor or catalyst with potential applications in electronics, chemistry and life sciences.