1/23/2024 0 Comments Example of non physical phenomena"The light strand shaped by the microstructured fiber design enables an unprecedented uniform illumination with constant high light intensity in optofluidic fibers, allowing extremely long and even more precise tracking of tiny objects. The light scattered by individual nanoparticles allows the dynamics of the particle objects to be observed with high precision. As a result, the sample to be examined, including the nano-objects contained therein, can be illuminated intensively and extremely homogeneously. When light is coupled into the fiber, it spreads evenly along the integrated fluid channel in the form of a strand. The fiber was manufactured by the company Heraeus Conamic. To demonstrate the formation of the new mode in fibers and its advantage for the FaNTA method, the researchers carried out experimental studies by equipping a special optical fiber with a light-conducting channel in the center of the fiber core with a diameter of 400 nanometers, filled with a liquid solution that contains diffusing nano-objects. Generating such light intensities in optical fibers requires sophisticated nanostructuring in the form of liquid-filled nanochannels in the fiber core, which can be used for real-time detection and counting of nano-objects. This mode, identified as a light strand, which they describe in the journal Optica, enables extremely homogeneous and constant illumination of diffusing nanoparticles along the entire fiber. Scientists at Leibniz Institute of Photonic Technology (Leibniz IPHT) in Jena, Germany, are researching the possibilities of the FaNTA method and its potential for a wide variety of nanoscale applications.Īs part of their research, the researchers demonstrated a new optical mode in glass fibers for the first time. In particular, fiber-assisted nanoparticle tracking analysis (FaNTA) enables microscopic observation of individual nano-objects confined in microchannels of optical fibers and the precise determination of their size distribution. The results of their studies were published in the journals Optica and Nature Communications.įiber-based methods are a promising approach for characterizing fast-moving nanoparticles in pharmaceuticals, bioanalytics and materials sciences. They thus lay the foundation for observing nanoparticles with unprecedented precision. Using special optical fibers, they identified a new optical mode that enables uniform illumination along the entire length of a fiber and determined the resolution limit of individual objects that could be measured with fibers. Researchers at Leibniz IPHT have made significant advances in deciphering tiny nano-objects. In all images on the right-handed side, the horizontal yellow dashed lines indicate the wall of the ARE. d Corresponding measured trajectory of several tracked nanoparticles. c Processed image showing the localization of the NPs (red circles). b Example of a selected frame showing 9 nm gold NPs diffusing inside the antiresonant element. An example of tracking such small nanoparticles with FaNTA can be seen in the images to the right. The concept of single antiresonant-element (ARE) fiber-assisted nanoparticle-tracking analysis (FaNTA) applied to track sub-10-nm nano-objects.
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