Science news articles about 'metal nanoparticles'

  • Argonne scientists discover networks of metal nanoparticles are culprits in alloy corrosion

    ... Fellow Ken Natesan said. "A network of continuous metal nanoparticles allow the carbon to dissolve and diffuse ... in the scale. "By examining the oxide scale, we find the metal nanoparticles," Zeng said. "If they are eliminated we can create a more corrosion ...
  • Surface plasmon resonances of metal nanoparticles in array can have narrower spectral widths

    ... experimentally and theoretically that the surface plasmon resonances of metal nanoparticles in a periodic array can have considerably narrower spectral widths than those of isolated metal nanoparticles. Further, as the optical fields are significantly more intense in a periodic ...
  • First metallic nanoparticles resistant to extreme heat

    ... the first demonstration of high-temperature stability in metallic nanoparticles, the vaunted next-generation materials ... 250 degrees more than typical metallic nanoparticles. Forged from the catalytic metals platinum and rhodium, the highly ...
  • Study improves understanding of method for creating multi-metal nanoparticles

    ... is a viable method for creating multi-component metal nanoparticles. We used gold and silver, but the same principles ... help other researchers explore other kinds of binary metal nanoparticles." Digestive ripening relies on the use of ligands ...
  • Researchers discover new way to design metal nanoparticle catalysts

    ... Processing have discovered a new strategy for fabricating metal nanoparticles in catalysts that promises to enhance the selectivity ... catalysts," Marks said. "This method could be used with a variety of different metal nanoparticles. It's a new strategy, and it could have a very big ...
  • Metal nanoparticles shine with customizable color

    ... (SEAS), and colleagues have engineered the size and shape of metal nanoparticles so that the color they appear strongly depends on the polarization of the light illuminating them. The nanoparticles can be regarded as antennas -- similar to antennas used for wireless ...
  • MIT crafts bacteria-resistant films

    ... coating surfaces with antimicrobial chemicals or embedding metal nanoparticles into the surface, which disrupt the bacterial cell walls. “For those bacteria that readily form biofilms, we have no ...
  • Metals shape up with a little help from friends

    ... -scaffolding material. The innovative use of the ligands allows for the metal nanoparticles to be dissolved--even at high concentrations ... . The scaffold is then allowed to cool. Because the metal nanoparticles have a very low melting point ...
  • Scientists overcome nanotech hurdle

    ... initiating self-assembly of peptides on the surface of a metal nanoparticle. Whilst this approach can provide a massive ... dynamics shows that the interactions between peptides leads to a nanoparticle that is relatively organized, but not uniform. This is the first time ...
  • University of Pennsylvania scientists move optical computing closer to reality

    ... developments in nanotechnology have enabled researchers to fabricate nanoparticle chains with great precision and fidelity. Penn ... took advantage of this technological advance by utilizing metallic nanoparticles as a chain of miniature waveguides that exchange ...
  • New technique sees into tissue at greater depth, resolution

    ... the molecular function of an antibody attaching to a receptor. "The use of metal nanoparticles as contrast agents with photothermal OCT ... cells, while metal nanospheres are relatively safer." "Also, given the wide range of nanoparticle shapes ...
  • Noble metal nanoparticles deposit on the mycelium of growing fungi—an approach to new catalytic systems?

    ... nanoscopic particles of a noble metal, the resulting mycelium is coated with the nanoparticles. As researchers from the Technical University in Dresden and the Max Planck Institute ...
  • Gold nanostars outshine the competition

    ... and biological sensing and imaging. These uniquely shaped nanoparticles may one day be used in a range of applications from disease diagnostics to contraband identification. SERS relies on metallic nanoparticles, most commonly gold and silver, to amplify ...
  • Researchers show how to 'stamp' nanodevices with rubber molds

    ... electrodes, and through them to other circuitry. In addition to metal nanoparticles, the process could be applied to quantum dots ... . They began with gold nanoparticles about 12 nanometers in diameter suspended in water. To suspend metal particles ...
  • Gold nanostar shape of the future

    ... is extremely weak. When the target molecule is coupled with a metal nanoparticle or nanostructure, the Raman response is greatly ... by designing a variety of unique types and shapes of metal nanoparticles that can be used as SERS labels for chemical and biomedical ...

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