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    near-infrared light tagged posts

    Hydrogen Fuel from water by harnessing Red and Near-infrared regions of sunlight

    November 18, 2017, Categories  Astronomy/Space

    This is an image of near-infrared-light-driven hydrogen evolution from water photo-driven by triruthenium photosensitizer. Credit: Kyushu University

    This is an image of near-infrared-light-driven hydrogen evolution from water photo-driven by triruthenium photosensitizer. Credit: Kyushu University

    Scientists have synthesized a compound with 3 ruthenium atoms connected by an organic molecule that absorbs near-infrared light to produce hydrogen from water. The absorbed light stimulates electrons to ‘jump’ into orbitals that do not exist in other, similar compounds. This is the first successful use of infrared light to reduce water into hydrogen, which can be used for energy conversion and storage, and other industrial purposes in a future sustainable energy society.

    Solar cells must absorb light of particular wavelengths, depending on how much energy the cell needs to drive the reaction...

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    Targeted Drug Delivery could help Fight Tumors and Local Infections

    January 20, 2016, Categories  Biology/Biotechnology, Health/Medical

    Photocleavable Hydrogel-Coated Upconverting Nanoparticles: A Multifunctional Theranostic Platform for NIR Imaging and On-Demand Macromolecular Delivery

    Photocleavable Hydrogel-Coated Upconverting Nanoparticles: A Multifunctional Theranostic Platform for NIR Imaging and On-Demand Macromolecular Delivery. Lanthanide-doped upconverting nanoparticles (UCNPs) have emerged as excellent nanotransducers for converting longer wavelength near-infrared (NIR) light to shorter wavelengths spanning the UV to visible (Vis) regions of the spectrum via a multiphoton absorption process, known as upconversion. Here, we report the development of NIR to UV–Vis–NIR UCNPs consisting of LiYF4:Yb3+/Tm3+@SiO2 individually coated with a 10 ± 2 nm layer of chitosan (CH) hydrogel cross-linked with a photocleavable cross-linker (PhL).

    Some drug regimens, eg those designed to eliminate tumors, are notorious for nasty side effects...

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