Ring resonators with TiO2 core confinement factors from 0.07 to 0.42 are fabricated and measured for thermal sensitivity achieving -2.9 pm/K thermal drift in the best case. Materials used are CMOS compatible (TiO2, SiO2 and Si3N4) on a Si substrate. The under discussed role of stress in thermo-optic behavior is clearly observed when contrasting waveguides buried in SiO2 to those with etched sid...

It has been found that the electrocatalytic properties of metallic nanoparticles supported on transition metal oxides are affected by existing strong metal–support interaction (SMSI). Herein, effects SMSI electrocatalysis hydrogen evolution reaction (HER) were investigated in acid electrolyte using Pt and Ag carbon titanium oxide (TiO2). High-resolution transmission electron microscopy (HR–TEM)...

In this study, a uniform nanoporous NiO film, with a thickness of up to 2.6 μm, was prepared using polyethylene glycol (PEG). The addition of PEG significantly decreased the cracks in the NiO film and prevented the peeling of the NiO film from a fluorine-doped tin oxide substrate. The NiO cathode was prepared using CdSeS quantum dots (QDs) as the sensitizer, with an optimized photoelectric conv...

We demonstrate a low cost, phosphine-free route to synthesize CdSe quantum dots (QDs) by heating the mixed precursors of Se and Cd up to 260 C. The as-synthesized CdSe QDs are characterized by using UV-visible absorption spectroscopy, high resolution transmission electron microscopy, X-ray diffractrometry, and EDX analyses. The CdSe QDsensitized TiO2 films of solar cells has been fabricated by ...

The template-based methods belong to low-cost and rapid preparation techniques for various nanostructures like nanowires, nanotubes, and nanodots or even quantum dots [QDs]. The nanostructured surfaces with QDs are very promising in the application as a sensor array, also called 'fluorescence array detector.' In particular, this new sensing approach is suitable for the detection of various biom...

In this work we present a theoretical investigation of the attachment of catechol and isonicotinic acid to the rutile-TiO2(110) surface. These molecules can be considered as prototypical dyes for use in Grätzel type dye sensitised solar cells (DSCs) and are often employed as anchoring groups in both organic and organo-metallic sensitisers of TiO2. Our study focuses on determining the lowest ene...

We report a combined high-temperature scanning tunneling microscopy, ion scattering spectroscopy, and photoelectron spectroscopy study of bare lanthanum aluminate LaAlO3 LAO and of the initial stages of anatase TiO2 growth on LAO 001 . LAO 001 exhibits mixed La–O and Al–O2 surface terminations at 400 °C. Heteroepitaxial TiO2, grown by evaporating Ti metal in O2, nucleates near step edges, growi...

Chemicals and Materials All chemicals used in the experiments (KBr, Fe2(SO4)3, H2SO4, ethanol, Rhodamine B) are analytical grade or better provided by Sinopharm Co., China. All aqueous solutions are prepared with deionized water (18.2 MΩ, Milli-Q, Millipore Corp., France). ITO glass slides were washed in an ultrasonic cleaner by isopropanol and deionized water for several times and dried by blo...

P3HT layers with a thickness of ∼5 nm were deposited on bare and TiO2-covered ZnO ripple structures. The ZnO ripples were prepared wet-chemically and a TiO2 layer with a thickness less than 5 nm was prepared by atomic layer deposition. Under humid air and visible light illumination, the oxidation behaviors of P3HT on these surfaces were studied using photoelectron spectroscopy. It was found tha...

The potential of inorganic nanomaterials as reservoirs for healing agents is presented here. Mesoporous silica (SBA-15) and TiO2 nanotubes (TNTs) were synthesized. Both epoxy-encapsulated TiO2 nanotubes and amine-immobilized mesoporous silica were incorporated into epoxy and subsequently coated on a carbon steel substrate. The encapsulated TiO2 nanotubes was quantitatively estimated using a 'de...