Pyroelectric Crystal For Microfluidics

Manipulating buffers and organic solvents on surfaces is fundamental for many biological and/or chemical operations and thus critical in various thermal, optical, and medical applications. For any of these, it is necessary to design a platform that enables locally addressable fluids to be navigated with a low loss rate and partitioned and merged in a [..]

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X-Ray Holographic Nano-Tomography (XNH)

Researchers have demonstrated that X-Ray Holographic Nano-Tomography (XNH) could help accelerate efforts to map neural circuits and ultimately the brain itself. The team describes how XNH can be used to image relatively large volumes of mouse brain and fruit fly nervous tissue at high resolutions. Combined with artificial intelligence-driven image analysis, they reconstructed dense neural [..]

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Colorimetric Sensor - Optical Chips

 By recent developments in photonic structures, some structural colors can be reversibly changed in response to external stimuli. Based on a lesson from natural photonic structure, specific examples of photonic crystal‐based structural coloring schemes show unprecedented possibilities in colorimetric sensor applications, such as temperature, pH, ion species, solvents, water vapor, humidity, pressure, and biomolecule detection. [..]

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Insulator-Metal Transition In Night Vision

Researchers have discovered what makes vanadium dioxide films conduct electricity (insulator-metal transition). Their findings will enable thermal imaging devices with a sensitivity and reaction rate superior to those of the currently existing analogs. While 100-nanometer thin films of vanadium dioxide (VO2) do not normally conduct electricity, their resistance drops up to 100,000 times when slightly [..]

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Bioelectronics

Conducting or semiconducting materials embedded in insulating polymeric substrates can be useful in bioelectronics applications; however, attainment of this composite configuration by direct chemical processes is challenging. Laser-assisted synthesis has evolved as a fast and inexpensive technique to prepare various materials, but its utility in the construction of biophysical tools or biomedical devices is less [..]

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Nafion Transparent Film

Researchers employed Nafion as a solid medium for the fabrication of transparent luminescent materials with tunable emissions. These membranes are quite famous for their ability to conduct protons and exchange cations. Nafion is composed of hydrophobic main chains and pendant hydrophilic side chains. The side chains are especially important. When Nafion is introduced to a [..]

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Deep Learning Framework

Researchers are working to harness a deep learning framework to learn more about how mental illness and other disorders affect the brain. The team is combining different types of brain imaging data to capture patterns that are indicative of brain disorders. Their work is funded by a $2.4 million, a four-year award from the National [..]

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Microlasers

A team of scientists have demonstrated tunable red, green and blue single-mode microlasers in an optimized heterogeneously coupled cavities constructed with three spherical microcavities incorporated with distinct gain media. The microcavities with perfect circle boundary and smooth surface were applied as high-quality WGM resonators. Benefiting from the outstanding flexibilities, RGB lasing was obtained by doping [..]

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PET Imaging

Tuberculosis (TB) disease affects 10 million people worldwide every year and is the leading cause of death from an infectious disease. New TB biomarkers are required for a variety of applications, including detection of sub-clinical disease for early intervention to prevent disease progression; detection of new active TB cases; and for monitoring of treatment response [..]

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Circularly Polarized Light

Artificial light plays an essential role in information technologies such as optical telecommunications, data storage, security features, and the display of information. Here, researchers show a chiral lanthanide lumino-glass with extra-large circularly polarized light (luminescence) (CPL) for advanced photonic security device applications. The chiral lanthanide glass is composed of a europium complex with the chiral [..]

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Pockels Effect

The explosive rise of silicon photonics has led to renewed interest in the electro-optic (EO) or Pockels effect due to its potential uses in many next-generation device applications. To find materials with a strong EO response in thin-film form, which are essential for low power and small footprint devices, one needs to find a general [..]

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Metasurface Lens

In the last decade or so, a group of scientists has begun to transform the field of optics by engineering flat optical metasurfaces (e.g. metasurface lens) that use an array of millions of microscopically thin and transparent fused-silica pillars to control phase, amplitude, and/or polarization of light. The technology was selected as among the Top [..]

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Nanopixels

For some applications, such as microprojection and augmented and virtual reality (AR/VR), researchers continue to chase ever-smaller pixel sizes (nanopixels) and higher pixel densities. And these efforts eventually run up against some practical limitations, particularly on pixel brightness, that are imposed by the 2D-patterning approaches commonly used to create display pixels. Now, researchers have proposed [..]

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Radiative Cooling

Instead of absorbing light from the Sun and transforming it into electricity like your typical solar panel, a new radiative cooling technology developed by researchers at Stanford University works in reverse. Even though there’s no incoming heat for solar panels to capture at night, there is still outgoing heat that can be used for energy. [..]

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Optical Physics

A highly advanced management of electronics, CMOS, and optical physics is pushing system-in-package designs past the terabit-per-second boundary in this DARPA-sponsored project. There’s a constant reassessment among the three key system blocks—processor, memory, and interconnects (I/O)—which is presently the “choke point” in enhancing overall performance, with each element pushing to get better so as to [..]

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Laser Test

Researchers have developed a laser test for measuring the effectiveness of a facemask. The mask-testing setup, is much simpler than those commonly seen in typical laser labs: it consists only of a laser, a lens, and a camera. Specifically, a laser is shone through a cylindrical lens to create an elliptical beam profile, which then [..]

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Imaging Method

While your skeleton helps your body to move, fine skeleton-like filaments within your cells likewise help cellular structures to move. Now, researchers have developed a new imaging method that lets them monitor a small subset of these filaments, called actin. Actin is the most abundant protein in the cell, so when you image it, it’s [..]

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