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Hydrogen adsorption on graphene can be increased by functionalization with Ti. This requires dispersing Ti islands on graphene as small and dense as possible, in order to increase the number of hydrogen adsorption sites per Ti atom. In this…

材料科学 · 物理学 2020-02-17 Yuya Murata , Stefano Veronesi , Dongmok Whang , Stefan Heun

Nanoscale surface analysis of 1 micrometer thick high entropy alloys (HEAs) was carried out using nano-IR for hyperspectral imaging and single point spectroscopy in the 700-1700 1/cm spectral range. Nano-IR is based on the detection of…

Numerical investigations are conducted to study the effect of factors such as particle clustering and interfacial layer thickness on thermal conductivity of nanofluids. Based on this, parameters including Kapitza radius, and fractal and…

流体动力学 · 物理学 2012-05-10 George Okeke , Sanjeeva Witharana , Joseph Antony , Yulong Ding

This study experimentally determines the dielectric properties of a powdery titanium (II) oxide (TiO) material within the microwave range (0.1-13.5 GHz). The properties were determined using a coaxial airline method using a TiO/paraffin…

应用物理 · 物理学 2019-04-19 Robert Tempke , Christina Wildfire , Dushyant Shekhawat , Terence Musho

The oxygen octahedral tilted domains in 0.90(Bi1/2Na1/2)TiO3-0.5(Bi1/2K1/2)TiO3-0.5BaTiO3 lead-free perovskite piezoelectric ceramic have been studied by transmission electron microscopy (TEM). Selected-area electron diffraction patterns…

材料科学 · 物理学 2015-05-13 Cheuk W. Tai , Y. Lereah

This study utilizes molecular dynamics simulations to scrutinize the influence of type and volume fraction of nanoparticle on the density of nanofluids, i.e. silver (as a hydrophilic case) and titanium dioxide (as a hydrophobic case)…

应用物理 · 物理学 2021-05-20 M. M. Heyhat , M. Abbasi , A. Rajabpour

Motivated by the experimental synthesis of two-dimensional (2D) perovskite materials, we study the stability of 2D SrTiO$_3$ from first principles. We find that the TiO$_6$ octahedral rotations emerge in 2D SrTiO$_3$ with a rotation angle…

材料科学 · 物理学 2023-10-27 Shota Ono , Yu Kumagai

Atomic and electronic structures of TiO_2(110) surface with possible adsorptional, substitutional and interstitial Au or Pt elemental impurities at full and one-sixth monolayer concentrations were investigated by density functional theory…

强关联电子 · 物理学 2012-11-19 Ersen Mete , Oğuz Gülseren , Şinasi Ellialtıoğlu

A number of metal-based nanopowders such kinds as Fe, Co, Fe/Co alloy, Fe/C, Fe/organic shell were successfully produced by aerosol synthesis method. The mechanism of nanoparticles formation and the influence of experimental parameters on…

材料科学 · 物理学 2007-08-13 E. S. Vasilieva , O. V. Tolochko , V. E. Yudin , D. Kim , D. -W. Lee

We report here a new concept, the use of bipolar electrochemistry, which allows the rapid and wireless growth of self-assembled TiO2 NT layers that consist of highly defined and controllable gradients in NT length and diameter. The gradient…

介观与纳米尺度物理 · 物理学 2016-10-18 G. Loget , S. So , R. Hahn , P. Schmuki

Titanium oxides have many fascinating optical and electrical properties, such as the superconductivity at 2.0 K in cubic titanium monoxide TiO polycrystalline bulk. However, the lack of TiO single crystals or epitaxial films has prevented…

超导电性 · 物理学 2017-02-27 Chao Zhang , Feixiang Hao , Guanyin Gao , Xiang Liu , Chao Ma , Yue Lin , Yuewei Yin , Xiaoguang Li

Nanostructured titania derived from the sol-gel processing requires a detailed study to clarify state-of-art of every process step starting from colloidal sol, peptization, gelation to the final sintering. The applied parameters such as…

Structural and electronic properties comparison between anatase, rutile and monoclinic TiO2(B) titania polymorphs in bulk and related nanostructures simulated by two-dimensional slabs has been performed by means of density functional theory…

材料科学 · 物理学 2011-08-16 Luciana Fernández-Werner , Ricardo Faccio , Helena Pardo , Álvaro W. Mombrú

This paper reports on a new and swift hydrothermal chemical route to prepare titanate nanostructures (TNS) avoiding the use of crystalline TiO2 as starting material. The synthesis approach uses a commercial solution of TiCl3 as titanium…

材料科学 · 物理学 2012-12-06 E. K. Ylhainen , M. R. Nunes , A. J. Silvestre , O. C. Monteiro

Herein, titania thin films are fabricated by a facile liquid-phase method based on vacuum filtration of a colloidal suspension of titania nanosheets, which is followed by thermal annealing to transform the nanosheet film into anatase TiO2.…

应用物理 · 物理学 2020-06-03 Masaya Sato , Masahiro Hara , Asami Funatsu , Ryo Nouchi

A method is presented for the registration and correlation of intrinsic property maps of materials, including data from nanoindentation hardness, Electron Back-Scattered Diffraction (EBSD), Electron Micro-Probe Analysis (EPMA). This highly…

Understanding the structural phase diagram of nano scale SrTiO3 has important implications on the basic physics and applications of the general class of transition metal oxide perovskites. Pressure dependent structural measurements on…

The nucleation and growth of pure titanium nanoparticles in a low-pressure sputter plasma has been believed to be essentially impossible. The addition of impurities, such as oxygen or water, facilitates this and allows the growth of…

Two sorts of solid organic samples can be produced in laboratory experiments simulating Titan atmospheric reactivity: grains in the volume and thin films on the reactor walls. We expect that grains are more representative of Titan…

地球与行星天体物理 · 物理学 2017-05-05 N. Carrasco , F. Jomard , J. Vigneron , A. Etcheberry , G. Cernogora

Bismaleimide (BMI) resin/ titania nanocomposites were synthesized from allylated-phenolic modified bismaleimide resin and TiO2 via the sol-gel process of tetrabutyltitanate (Ti(OnBu)4, TBT). These nanocomposite materials were characterized…

材料科学 · 物理学 2013-04-29 Guotao Lu , Ying Huang