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    Category Chemistry/Nanotechnology

    Solar Cells: High-quality Perovskite materials developed capable of utilizing Long-Wavelength Sunlight

    November 2, 2015, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    A high-quality mixed-organic-cation perovskite (MA)x(FA)1−xPbI3 is prepared from a phase-pure non-stoichiometric intermediate complex (FAI)1−x−PbI2. The phase-pure (FAI)1−x−PbI2 probably facilitates homogenous nucleation and modulates the growth kinetics during the crystallization of (MA)x(FA)1−xPbI3. This strategy can be expected to pave the way for the development of mixed-organic-cation perovskite solar cells.

    A high-quality mixed-organic-cation perovskite (MA)x(FA)1−xPbI3 is prepared from a phase-pure non-stoichiometric intermediate complex (FAI)1−x−PbI2. The phase-pure (FAI)1−x−PbI2 probably facilitates homogenous nucleation and modulates the growth kinetics during the crystallization of (MA)x(FA)1−xPbI3. This strategy can be expected to pave the way for the development of mixed-organic-cation perovskite solar cells.

    NIMS researchers have developed the world’s first method to fabricate high-quality perovskite materials capable of utilizing long-wavelength sunlight of 800 nm or longer...

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    Single-agent Phototherapy System offers Efficacy of Cancer Diagnosis, Surgery and Rx around the world

    October 29, 2015, Categories  Physics, Health/Medical, Chemistry/Nanotechnology, Biology/Biotechnology

    This new single-agent phototherapy system may form a valuable new approach to fighting cancer. Credit: Graphic courtesy of Oregon State University

    This new single-agent phototherapy system may form a valuable new approach to fighting cancer. Credit: Graphic courtesy of Oregon State University

    Oregon State University today announced an important advance in the field of cancer imaging and phototherapy. It uses a single chemical compound, silicon naphthalocyanine, that has both diagnostic and therapeutic value. It makes cancer cells glow when exposed to near-infrared light, so a surgeon can identify the cancer and remove it + the compound creates heat and reactive oxygen species within any remaining cancer cells, killing them.

    In tests completed with laboratory animals, tumors were completely eradicated without side effects, and did not return...

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    Rosetta finds Molecular Oxygen on comet 67P (Update)

    October 29, 2015, Categories  Astronomy/Space, Chemistry/Nanotechnology

    Rosetta’s detection of molecular oxygen

    Rosetta’s detection of molecular oxygen

    ESA’s Rosetta spacecraft has made the 1st in situ detection of oxygen molecules outgassing from a comet, a surprising observation that suggests they were incorporated into the comet during its formation.

    Rosetta has been studying Comet 67P/Churyumov–Gerasimenko for over a year and has detected an abundance of different gases pouring from its nucleus. Water vapour, CO and CO2 are the most prolific, with a rich array of other N-, S- and C-bearing species, and even ‘noble gases’ also recorded...

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    Scientists Synthesize Hexagonal Boron Nitride

    October 28, 2015, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    Synthesis of multilayer h-BN film.

    (a) Schematic diagram of the chemical vapour deposition approach for h-BN synthesis. Borazine is used as a precursor. A multilayer h-BN film is grown on a Fe foil in a quarts tube. (b,c) Photographs of as-grown h-BN film on a Fe foil and the transferred h-BN film onto a SiO2/Si substrate. (d,e) SEM images of an h-BN film on a Fe foil. (f) Cathodoluminescence spectra of multilayer h-BN film. (g) Optical image of multilayer h-BN film. (h) Raman mapping image of the E2g peak near 1,366 cm−1 corresponding to the area of g. (i) Raman spectra of each spot for the corresponding blue triangle, red circle and black square in h. (j) X-ray diffraction pattern of multilayer h-BN film on a SiO2/Si substrate. (k) Contact angles of bare Fe (top) and as-grown h-BN on a Fe foil (bottom)...

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