UV Irradiation To Tailor Graphene Optical Response

Researchers have studied the impact of in situ photoreduction, by means of UV irradiation, on the nonlinear optical response (NLO) of some graphene oxide (GO), fluorographene (GF), hydrogenated fluorographene (GFH) and graphene (G) dispersions. In situ UV photoreduction allowed for the extended modification of the degree of functionalization (i.e., oxidization, fluorination and hydrogenation), leading to [..]

Read More
Multiple Sclerosis – Early Detection With MRI

Focal white matter lesions (WML) of demyelination are the most readily detectable manifestation of multiple sclerosis at morphologic MRI. However, they represent only macroscopic tissue damage. Therefore, they are unable to fully explain the topographic origin and severity of many clinical symptoms of multiple sclerosis, particularly in the progressive phase of the disease. Advanced imaging [..]

Read More
Stretchable Sensor With Optical Fiber

Skin-like electrical stretchable sensor has been widely employed for wearable human healthcare monitoring but is limited by electromagnetic interferences, poor waterproof performance, and point-type measurement. Now, researchers have developed a skin-like optical fiber (SSOF) stretchable sensor with excellent stretchability (up to 100%), flexibility, and excellent compliance with skin is reported. A hybrid coding based on [..]

Read More
Optical Fiber Imaging For Medical Applications

A new optical fiber imaging technique could transform imaging for a wide range of industrial inspection and environmental monitoring applications. It allows 3D imaging at video rates through a fiber the width of a human hair. In the longer term, with development, the technique can work for applications in medical imaging. Typically, when light shines [..]

Read More
Electrochemical Reaction - Spectroscopic Study

Electrochemical reduction and evolution of oxygen are two critical reactions, which almost determine the performance and efficiency of clean-energy devices due to their sluggish reaction kinetics and large overpotential. Apart from the oxygen reduction/evolution reaction (ORR/OER), the importance of the hydrogen evolution/oxidation reaction (HER/HOR) cannot be ignored either, as hydrogen can work as the powerful [..]

Read More
Colloidal Quantum Dots For Optoelectronics

Semiconductors at the heart of electronic and optoelectronic devices require high-purity materials and involve costly manufacturing processes. In contrast, emerging applications often require a combination of the electronic and optical properties of inorganic semiconductors and cost-efficient solution-based fabrication techniques suitable for industrial-scale manufacturing. In recent years, colloidal quantum dots (QDs) have become a versatile platform [..]

Read More
Electron Microscopy Interfaced With Integrated Photonics

Scientists have achieved efficient electron-beam modulation using integrated photonics – circuits that guide light on a chip. The experiments could lead to entirely new quantum measurement schemes in electron microscopy. The transmission electron microscope (TEM) can image molecular structures at the atomic scale by using electrons instead of light, and has revolutionized materials science and [..]

Read More
Brain Chip Detects Electrical Pulses, Chemicals

Neurons use electrical pulses and chemicals to communicate with each other. Analyzing both is critical for studying brain function and spotting brain diseases, but today’s implants can measure only one or the other. Researchers have now made a multifunctional brain chip that can measure both electrical charges and neurochemicals in the brain and inject drugs [..]

Read More
Early Stage Lung Cancer Detection From A Drop Of Blood

Lung cancer, the leading cause of cancer death, is usually diagnosed late with a low survival rate. Early-stage lung cancer is primarily asymptomatic. Low-dose spiral CT imaging (the current method for detecting early lung cancer lesions) isn’t feasible as a widespread screening test for the general population due to the high cost and the radiation [..]

Read More
Solar Materials For Ultrathin, Lightweight Solar Panel

Researchers have achieved record efficiencies in a promising group of photovoltaic materials. These materials – transition metal dichalcogenides – or TMDs – absorb ultrahigh levels of the sunlight that strikes their surface compared to other solar materials like silicon. It is much too heavy, bulky, and rigid for applications where flexibility, lightweight, and high power [..]

Read More
Split Photons Discovery To Advance Optical Sensors

Researchers are predicting that split photons may also exist. This is a major paradigm change of how we understand light. Not only did the researchers find a new physical entity, but it was one that nobody believed could exist. The theoretical discovery of the split photons – known as a “Majorana bosons” – advances the [..]

Read More
Multimode Optical Fiber Transforms 3D Imaging

Researchers are developing a new technique for imaging through a single multimode optical fiber the width of a human hair. The researchers aim to create a new generation of single-fiber imaging devices that can produce 3D images of remote scenes. Normally, when light shines through a single multimode optical fiber, crosstalk between modes scrambles the [..]

Read More
Synchrotron Light For Glass Microfluidics Applications

Shedding synchrotron light on microfluidic systems, exploring several contrasts in situ/operando at the nanoscale, like X-ray fluorescence, diffraction, luminescence, and absorption, has the potential to reveal new properties and functionalities of materials across diverse areas, such as green energy, photonics, and nanomedicine. Researchers have developed the micro-fabrication and characterization of a multifunctional polyester/glass sealed microfluidic [..]

Read More
Frequency Upconversion Turns Infrared Into Visible Light

Molecules have rich signatures in their spectra at infrared wavelengths and are typically accessed with dedicated spectroscopic instrumentation. Researchers have discovered optomechanical frequency upconversion from the mid-infrared to the visible domain using molecular vibrations coupled to a plasmonic nanocavity at ambient conditions. Using different nanoantenna designs, one with a nanoparticle-on-resonator and the other with nanoparticle-in-groove, [..]

Read More
Intraocular Lens Tunability Will End Exchanges

Through their careers, most cataract surgeons become highly comfortable with and adept at performing phacoemulsification, removing even the most challenging lenses, and placing lens implants with little stress. As their comfort in this procedure grows, it often decreases with other operations performed less frequently, such as intraocular lens exchange. For some, the prospect of performing [..]

Read More
Transparent Electrodes For Optoelectronic Applications

A primary metal-semiconductor interface can create a potential energy barrier to the efficient flow of electrons, depending on the electronic properties of the two materials. It is vital to make a careful choice of contact material and the process to deposit material onto the semiconductor. The design considerations are more complicated for optoelectronic components such as light-emitting [..]

Read More
Phase Changing Material For Smart Night Vision

Researchers have developed a novel tunable optical filter for smart IR night vision imaging systems. They used a new phase changing material (PCM) – GSST, that undergoes a phase transition at a higher transition temperature (approx. 300°C). It is synthesized by partially substituting selenium for tellurium, resulting in a composition of Ge2Sb2Se4Te1. The phase changing [..]

Read More