Materials Literature
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Phase-change materials (PCMs) integrated with nanophotonic components enable tunable integrated optical devices and hold promise for emerging applications in long-term photonic data storage by exploiting the large contrast in optical properties when switched between amorphous and crystalline phase states. The phase tr…
Many phase transitions in correlated matter exhibit spatial inhomogeneities with expected yet unexplored effects on the associated ultrafast dynamics. Here we demonstrate the combination of ultrafast nondegenerate pump-probe spectroscopy with far from equilibrium excitation, and scattering scanning near-field optical…
Light-triggered drug delivery systems enable site-specific and time-controlled drug release. In previous work, we have achieved this with liposomes containing gold nanoparticles in the aqueous core. Gold nanoparticles absorb near-infrared light and release the energy as heat that increases the permeability of the lipo…
Calculation of core loss is essential in the design of magnetic components especially in high frequency applications. Existing empirical approaches still present some limitations such as the inaccuracy and the difficulty to apply under nonsinusoidal waveforms. In particular, these methods fail to predict core loss wit…
A shape-memory adhesive has been prepared that exhibits two levels of reversible adhesion. The adhesive is a semicrystalline cross-linked polymer that contains dynamic disulfide bonds. Melting of the crystalline regions via heat causes a drop in the modulus of the material facilitating wetting of the substrate as well…
We design and numerically investigate a perfect narrow band absorber based on a metal-metal-dielectric-metal structure which consists of periodic metallic nanoribbon arrays. The absorber presents an ultra narrow absorption band of 1.11 nm with a nearly perfect absorption of over 99.9% in the infrared region. For obliq…
The emergence of stretchable electronic devices has attracted intensive attention. However, most of the existing stretchable electronic devices can generally be stretched only in one specific direction and show limited specific capacitance and energy density. Here, we report a stretchable isotropic buckled carbon nano…
Modern semiconductor devices have revolutionized wide-ranging technologies such as electronics, lighting, solar \nenergy, and communication [1]. The semiconductor industry \nemploys Si to fabricate electronic circuits, and GaAs, \nGaN, and other III–V materials for optoelectronics [2], with \ntypical substrates consis…
Nanoparticles (NPs) have diverse properties when compared to respective chemicals due to their structure, surface to volume ratio, morphology, and reactivity. Toxicological effects of metallic NPs on organisms including plants have been reported. However, to the best of our knowledge, there is still not any report on…
Highly uniform Mo-glycerate solid spheres are synthesized for the first time through a solvothermal process. The size of these Mo-glycerate spheres can be easily controlled in the range of 400-1000 nm by varying the water content in the mixed solvent. As a precursor, these Mo-glycerate solid spheres can be converted i…
Recent investigations on two-dimensional black phosphorus material mainly highlight work on few atomic layers and multilayers. It is still unknown if the black phosphorus atomically thin sheet is an ideal structure for the enhanced gas-solid interactions due to its large surface area. To further investigate this conce…
Metallic stents are used to promote revascularization and maintain patency of plaqued or damaged arteries following balloon angioplasty. To mitigate the long-term side effects associated with corrosion-resistant stents (i.e., chronic inflammation and late stage thrombosis), a new generation of so-called "bioabsorbable…
Phosphorene and phosphorene analogues such as SnS and SnSe monolayers are promising nanoelectronic materials with desired bandgap, high carrier mobility, and anisotropic structures. Here, we show first-principles calculation evidence that these monolayers are potentially the long-sought two-dimensional (2D) materials…
Abstract ................................................................................................. 204 14.1 Introduction .................................................................................. 204 14.2 Experimental ................................................................................ 205…
Étude structurale, distribution cationique et état d'oxydation dans des nanoparticules magnétiques de ferrite du type coeur-coquille Nous explorons les propriétés structurales de nanoparticules cœur-coquille, avec un cœur de ferrite MFe2O4 (M = Mn et Co) ou de ferrite mixte Mn-Zn. Ces nanoparticules sont obtenues par…
Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts Nous avons étudié la dynamique de particules rigides et sphériques immergées dans un écoulement de cisaillement simple et oscillant à bas nombre de Reynolds. Les particules, au delà d’une déformation critiqu…
Cette thèse porte sur la relation entre le procédé de préparation et la structure des nanocomposites polypropylène/argile. Les échantillons ont été préparés au mélangeur interne dans un premier temps. Des observations au microscope électronique à balayage, complétées par des analyses en diffraction des rayons X ainsi…
エレクトロスピニング (ES) 法は，キャピラリー先端に高電圧を印加し，高分子溶液を吐出させることで，溶媒を瞬時に蒸散させ，繊維直径が数十～数百ナノオーダーのナノファイバーを形成させる技術である．古くからES法は繊維業界において直径がナノメートルサイズの繊維による不織布の製造方法として研究されてきた．また，医学分野では，細胞工学や再生医療を行う際の細胞の足場として研究されており，iPS細胞の確立とも相まって，様々な臓器の再生に応用できる技術であると期待されている．さらに，工学分野ではセルロースナノファイバーの調製と研究が隆盛となり，ES法は様々な工業製品へ応用できる未来の新素材を創製する技術として注目を集めている．しかし，薬学分野…
Rezistencija mikroorganizama na antimikrobne lijekove danas je vrlo raširen problem koji dovodi do primjene većih doza lijekova i posljedično veće toksičnosti, neuspješnog liječenja i duljeg zadržavanja u bolnici te, na kraju, povećanog mortaliteta. Stoga se sve više istražuju terapijski nanosustavi nespecifičnog anti…
Duration: 12:46