다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications

The richness of optical and electronic properties of graphene attracts enormous interest. Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability. So far, the main focus has been on fundamental physics and electronic devices. However, we believe its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability. The rise of graphene in photonics and optoelectronics is shown by several recent results, ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers. Here we review the state-of-the-art in this emerging field.

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Graphene photonics and optoelectronics

Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria

Thin SnOx films were applied to polyester foil by reactive rf magnetron sputtering. Typical data for 0.3-μm thick films were ~150-Ω resistance/square and ~76% luminous transmittance. Deposition rates exceeding 1 nm/s were obtained.

Transparent conducting SnO(x) films high rate reactively sputtered onto polyester foil.

Dielectric function of “undoped” In2O3

La fonction dielectrique complexe permet de comprendre les proprietes optiques des materiaux et d'obtenir leurs performances radiatives

Dielectric function of sputter-deposited silicon dioxide and silicon nitride films in the thermal infrared.

Resistance fluctuations in thin crystalline TiO2 films were investigated for gas sensing applications. The measurements were carried out as the films were irradiated by ultraviolet (UV) light with a wavelength of 370 nm in the presence of H2S. The films were prepared by reactive DC magnetron sputtering. They had a crystalline phase of anatase and a mean grain size of 17.8 nm, as found by X-ray diffraction. A prominent change in resistance noise level was discovered as the irradiated film was exposed to a gas containing 1.5 ppm of H2S, while no change was observed in the absence of UV. This effect is possibly due to decomposition of the adsorbed gas, via photocatalysis induced by TiO2, or to a decrease of the potential barrier between the charged grains.

https://iopscience.iop.org/article/10.1088/1742-6596/76/1/012056/pdf

Resistance noise in TiO2-based thin film gas sensors under ultraviolet irradiation

This paper reports on optical transmittance through samples comprised of ultrafine gold particles. These were prepared by two techniques: gas evaporation and island growth in discontinuous films. The measured data could be brought into detailed quantitative agreement with computed data based on the Maxwell‐Garnett theory provided an accurate model for the particle morphology was employed and the local‐field effects were accounted for properly.

Claes-Göran Granqvist

Papers

Transparent conducting SnO(x) films high rate reactively sputtered onto polyester foil.

Dielectric function of “undoped” In2O3

Dielectric function of sputter-deposited silicon dioxide and silicon nitride films in the thermal infrared.

Resistance noise in TiO2-based thin film gas sensors under ultraviolet irradiation

Optical properties of ultrafine gold particles