Articles tagged with Optical Properties
Researchers from Russia and India have developed a narrow-band UV photodetector based on indium oxide nanocrystals embedded in aluminum oxide. The device shows record values of responsivity and external quantum efficiency, making it suitable for applications such as fluorescence detection and UV phototherapy.
Scientists investigated aerosol optical properties and radiative effects in the Pearl River Delta region of China. They found that fine-mode strongly absorbing particles dominated aerosols during the dry season, significantly influencing radiation exchange between Earth's surface and atmospheric system.
Researchers at MIPT have conducted precise measurements of ultrathin gold films, which are key components of modern micro- and nanoscale optical and optoelectronic devices. The findings reveal that the properties of thin gold films are heavily dependent on their structure and average grain size.
Researchers at Imperial College London have created a filter that can switch between reflecting and transmitting light by fine-tuning the distance between nanoparticles in a single layer. This development could lead to the creation of special materials with real-time tunable optical properties.
Researchers have discovered that fluorescence in ligand-protected gold nanoclusters is an intrinsic property of the gold particles. The study used Au20 nanoparticles with a tetrahedral structure and found intense fluorescence at a wavelength of 739.2 nanometers, indicating that the metal core is responsible for the phenomenon.
Scientists have discovered that three-dimensional graphene can be tuned to exhibit precise control over its plasmon frequencies through doping, pore size, or molecule attachment. This property may enable the creation of specific chemical sensors and solar cells.
The researchers have developed a new technique to apply precisely controlled silica coatings to quantum dot nanorods, saving time and preserving their optical properties. The approach enables the coating process to be completed in a day, up to 21 times faster than previous methods.
Plant cellulose can self-assemble into wrinkled surfaces that produce striking optical effects, such as iridescence and color changes. The researchers found that the twisting structure of cellulose creates a pattern of parallel ridges that split light into its colored components, producing an iridescent sheen.
Scientists developed a technique to enhance nanoparticle signals using an optical microcavity, achieving near fundamental diffraction limit resolution. This enables the study of individual nanoparticles' optical properties, promising potential breakthroughs in biology, chemistry, and nanoscience.
The study introduces a novel approach to growing nanowires using metal-alloy catalysts, allowing for more control over their light-emitting and electronic properties. By adjusting the concentration of nickel and gold in the catalyst, researchers can precisely manipulate the orientation of the nanowires.
Bending nanomaterials can detach layers from each other, improving control over their electronic and optical properties. This discovery advances research in nanoelectronics and optoelectronics, allowing for more accurate interpretation and tuning of material properties.
Researchers at NC State University have developed a technique to produce large quantities of gold nanorods while controlling their dimensions and optical properties. This allows for the creation of nanorods with tailored aspect ratios, essential for various biomedical applications.
New York University chemists have created an optical evaluation instrument that can assess the viability of displays in consumer and industrial products. The device, developed with Hinds Instruments, uses a complex scheme to modulate and analyze light polarization, enhancing accuracy by encoding properties in intensity changes over time.
Researchers at the University of Southampton have created an artificial material that can be controlled by electric signals. This breakthrough enables the rapid manipulation of metamaterial building blocks, leading to changes in transmission and reflection characteristics.
UBC chemists create a new model to predict the optical properties of non-conducting ultra-fine particles, which could inform the design of nano-structures and help study cosmic dust formation. The findings have potential applications in remote sensing and drug delivery systems.
Researchers at NC State University create core/shell nanoparticles with gold and silver, as well as alloy nanoparticles, using the 'digestive ripening' technique. This method allows for control over optical properties of the resulting nanoparticles.
Researchers develop scalable devices exhibiting customizable optical properties using a bottom-up approach inspired by nature. The findings showcase potential applications in sensitive sensors, detectors, and invisibility cloaks, and demonstrate the possibility of manipulating artificial molecules to create desired optical properties.
Scientists at NIST made precise measurements of nanotube concentrations for transparent conducting sheets, revealing the importance of uniform length for high-performance films. The study validated one theory, showing that longer nanotubes become electrically conducting at lower concentrations.
Researchers at Arizona State University have made a breakthrough in understanding the effect of brown carbon on climate change by developing a novel technique to measure its optical properties. This discovery could lead to more accurate forecasting of global warming activity, as current models often overlook this key component.
University of Oregon chemist Jim Hutchison has developed a method to rapidly generate diverse libraries of functionalized gold particles with cores of 11 gold atoms. The new synthesis technique offers great promise for research and development at the nanoscale.
Hydrogel nanoparticles provide a foundation for creating self-assembled periodic structures that can transmit specific wavelengths of light. By controlling the de-swelling process, the researchers can tune the colors to one-nanometer steps over a wavelength range of more than 200 nanometers.
Researchers at Northwestern University have developed a method to create triangular nanoprisms in large quantities, which can be used as new diagnostic labels for detecting biological weapons and diseases. The nanoparticles' unique optical properties make them a promising building block for detection science.
A five-year ONR-sponsored initiative aims to investigate optical properties of the shallow ocean floor to enhance remote sensing and underwater imaging capabilities. The experiment will aid in mine detection and provide high-resolution maps of coral reef ecosystems, enabling easier disease spotting.