Publications by authors named "Nicolas Filippin"
Article Synopsis
- * The array consists of vertical TiO nanotubes covered with Ag nanoparticles, improving surface area, water repulsion, and Raman signal enhancement through localized electromagnetic and charge transfer effects.
- * Achieving a Raman enhancement factor of 9.4 × 10, the device demonstrates exceptional sensitivity with a few-molecule detection limit of 10 M for Rh6G, while being scalable for mass production.
One-dimensional (1D) nanostructured surfaces based on high-density arrays of nanowires and nanotubes of photoactive titanium dioxide (TiO) present a tunable wetting behavior from superhydrophobic to superhydrophilic states. These situations are depicted in a reversible way by simply irradiating with ultraviolet light (superhydrophobic to superhydrophilic) and storage in dark. In this article, we combine in situ environmental scanning electron microscopy (ESEM) and near ambient pressure photoemission analysis (NAPP) to understand this transition.
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- The study introduces a novel technique for creating nanocrystalline hierarchical nanotubes using organic nanowires and plasma-enhanced chemical deposition of anatase TiO layers, operating at temperatures from room temperature to 250 °C.
- This method results in dense nanotubes with customizable properties, which can be formed on various substrates, including metals and conductive oxides.
- The 3D nanoarchitecture shows promising performance as a photoanode in solar cells, achieving efficiencies of 4.69% while demonstrating mechanical stability and potential applications in energy harvesting, catalysis, and nanosensing.
A three-step vacuum procedure for the fabrication of vertical TiO2 and ZnO nanotubes with three dimensional walls is presented. The method combines physical vapor deposition of small-molecules, plasma enhanced chemical vapor deposition of inorganic functional thin films and layers and a post-annealing process in vacuum in order to remove the organic template. As a result, an ample variety of inorganic nanotubes are made with tunable length, hole dimensions and shapes and tailored wall composition, microstructure, porosity and structure.
View Article and Find Full Text PDFSilver nanoparticles (NPs) depicting well defined surface plasmon resonance (SPR) absorption were deposited on flat substrates by physical vapor deposition in a glancing angle configuration. The particles were characterized by scanning electron microscopy and atomic force microscopy and their optical properties examined by UV-vis absorption spectroscopy using linearly polarized light. It was found that, depending on the amount of deposited silver and the evaporation angle, part of the 'as-prepared' samples present NPs characterized by an anisotropic shape and a polarization dependent SPR absorption and different colors when using polarized white light at 0° and 90°.
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