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IMAGE: Scanning electron microscopy images of newly fabricated highly ordered nanohole arrays in tungsten, iron, cobalt and niobium oxide layers. view more
Credit: Tokyo Metropolitan University
Tokyo, Japan - Scientists from Tokyo Metropolitan University have developed a new method for making ordered arrays of nanoholes in metallic oxide thin films using a range of transition metals. The team used a template to pre-pattern metallic surfaces with an ordered array of dimples before applying electrochemistry to selectively grow an oxide layer with holes. The process makes a wider selection of ordered transition metal nanohole arrays available for new catalysis, filtration, and sensing applications.
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IMAGE: Simultaneous multicontrast OR-PAM of hemoglobin concentration, oxygen saturation, blood flow speed, and lymphatic concentration; doi 10.1117/1.AP.3.1.016002 view more
Credit: Wang, et al.
Optical-resolution photoacoustic microscopy (OR-PAM), a new hybrid imaging technique, allows us to listen to the sound of light and see the color of biological tissue itself. It can be used for live, multicontrast functional imaging, but the limited wavelength choice of most commercial lasers and the limitations of the existing scanning methods have meant that OR-PAM can obtain only one or two different types of contrast in a single scan. These limitations have made multicontrast functional imaging time-consuming, and it s been difficult to capture the dynamic changes of functional information in biological tissues.
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IMAGE: A light field with time-dependent frequencies - propagating in a waveguide. Due to self-compression the pulse addresses individual quantum emitters. view more
Credit: University of Innsbruck
In order to exploit the properties of quantum physics technologically, quantum objects and their interaction must be precisely controlled. In many cases, this is done using light. Researchers at the University of Innsbruck and the Institute of Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences have now developed a method to individually address quantum emitters using tailored light pulses. Not only is it important to individually control and read the state of the emitters, says Oriol Romero-Isart, but also to do so while leaving the system as undisturbed as possible. Together with Juan Jose? Garci?a-Ripoll (IQOQI visiting fellow) from the Instituto de Fi?sica Fundamental in Madrid, Romero-Isart s research group has now investigated
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IMAGE: Nanomaterials of perovskite dispersed in hexane and irradiated by laser. Light emission by these materials is intense thanks to resistance to surface defects view more
Credit: Luiz Gustavo Bonato
Quantum dots are manmade nanoparticles of semiconducting material comprising only a few thousand atoms. Because of the small number of atoms, a quantum dot s properties lie between those of single atoms or molecules and bulk material with a huge number of atoms. By changing the nanoparticles size and shape, it is possible to fine-tune their electronic and optical properties - how electrons bond and move through the material, and how light is absorbed and emitted by it.
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IMAGE: From left, Pan Adhikari, Lawrence Coleman and Kanishka Kobbekaduwa align the ultrafast laser in the Department of Physics and Astronomy s UPQD lab. view more
Credit: Clemson University
CLEMSON, South Carolina By using laser spectroscopy in a photophysics experiment, Clemson University researchers have broken new ground that could result in faster and cheaper energy to power electronics.
This novel approach, using solution-processed perovskite, is intended to revolutionize a variety of everyday objects such as solar cells, LEDs, photodetectors for smart phones and computer chips. Solution-processed perovskite are the next generation materials for solar cell panels on rooftops, X-ray detectors for medical diagnosis, and LEDs for daily-life lighting.