A5007713392- Nanofabrication and Lithography Techniques
- Photonic and Optical Devices
- Advancements in Photolithography Techniques
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Photopolymerization techniques and applications
- Nonlinear Optical Materials Studies
- Silicone and Siloxane Chemistry
- 3D Printing in Biomedical Research
- Semiconductor Lasers and Optical Devices
- Additive Manufacturing and 3D Printing Technologies
- Analytical Chemistry and Sensors
- Anodic Oxide Films and Nanostructures
- Advanced Surface Polishing Techniques
- Semiconductor materials and devices
- Transition Metal Oxide Nanomaterials
- Integrated Circuits and Semiconductor Failure Analysis
- Quantum Dots Synthesis And Properties
- Photorefractive and Nonlinear Optics
- Cellular Mechanics and Interactions
- Advanced Fiber Laser Technologies
- TiO2 Photocatalysis and Solar Cells
- Photochromic and Fluorescence Chemistry
- Liquid Crystal Research Advancements
- Advanced optical system design
National Interuniversity Consortium of Materials Science and Technology
2008-2021
University of Padua
2010-2019
Veneto Institute of Molecular Medicine
2016-2017
Veneto Nanotech (Italy)
2013-2015
École Polytechnique Fédérale de Lausanne
2012
Abstract The development of a solution‐deposited up‐converted distributed feedback laser prototype is presented. It employs sol–gel silica/germania soft‐lithographed microcavity and CdSe–CdZnS–ZnS quantum dot/sol–gel zirconia composites as optical gain material. Characterization the linear nonlinear properties dots establishes their high absorption cross‐sections in one‐ two‐ photon regimes to be 1 × 10 −14 cm 2 5 4 GM, respectively. In addition, ultrafast transient dynamics measurements...
Structurally and mechanically similar to the extracellular matrix (ECM), biomimetic hydrogels offer a number of opportunities in medical applications. However, generation synthetic microenvironments that simulate effects natural tissue niches on cell growth differentiation requires new methods control hydrogel feature resolution, biofunctionalization mechanical properties. Here we show how these goals can be achieved by using pullulan-based hydrogel, engineered composition server as...
The preparation of highly homogeneous hybrid organic−inorganic materials with enhanced functional properties requires a deep understanding the synthesis process and high control material structure. To achieve this goal it is necessary to apply advanced characterization techniques that can elucidate all different features structure complicated by presence interconnected organic inorganic species cooperate in building complex network. We have used as case study sol−gel synthesized...
A new spin-on alumina-based resist exhibits excellent performance in terms of both achievable lateral resolution and etch resistance fluorine-based non-cryo-cooled dry etching processes. The has selectivity greater than 100:1 with respect to the underlying silicon during process, patternability various lithographic tools (UV, X-rays, electron beam, nanoimprint lithography), positive negative tone behavior depending only on developer chemistry. As a service our authors readers, this journal...
In this paper, we have investigated the properties of a composite SiO2−TiO2/TiO2 nanoparticle system. Hybrid films been prepared using sol−gel process, starting from tetraisopropoxy titanate and 3-glycidoxipropyltrimethoxysilane as precursors performing synthesis at room temperature. The spin-coated thoroughly characterized with UV−vis FT-IR spectroscopies, TEM analysis, profilometry, ellipsometry to evaluate their physical structural properties. Particular attention has devoted study...
New epoxy based sol–gel organic inorganic materials, showing lithographic resist-like properties without the addition of any photocatalysts, are presented. To obtain a material sensitive to radiation, specific syntheses on an organically modified alkoxide containing ring, 3-glycidoxypropyltrimethoxysilane (GPTMS), have been developed. The synthesis and patternability hybrid materials obtained controlling crosslinking degree with almost total absence polymerization. Two examples directly...
Irradiation of aryl tosylates leads to homolysis the ArO–S bond and PTSA or <italic>p</italic>-toluenesulfinic acid was released. The sulfonates tested were then used as non-ionic photoacid generators (PAGs) in hybrid organic/inorganic sol–gel photoresists.
An industrially feasible process for the fast mass-production of molded polymeric micro-patterned substrates is here presented. Microstructured polystyrene (PS) surfaces were obtained through micro injection molding (μIM) technique on directly patterned stamps realized with a new zirconia-based hybrid spin-on system able to withstand 300 cycles at 90 °C. The use entails great advantage overall manufacturing as it allows fast, flexible, and simple one-step respect milling, laser machining,...
We report a facile production of an up-converted surface-emitting DFB laser, performed by exploiting the versatility sol–gel chemistry, intriguing properties well designed graded CdSe–CdS–Cd0.5Zn0.5S–ZnS colloidal quantum dots, and scalability nanoimprinting. Our laser prototype operates in visible region following efficient optical pumping either direct one-photon excitation or through up-conversion near infrared (NIR) light. By achieving cavity mode Q-factors excess 650 retaining high...
In this study, we investigate CdSe based core−shell quantum dots as potential active materials for nonlinear optical applications. A detailed characterization of the linear and properties is carried out QDs in solution within two electronically similar sol−gel hosts, hafnia zirconia. The favorable absorption emission solid-state hybrid sol−gel/QD matrices are exploited realization up cavity-less laser.
Sol–gel derived inorganic–organic hybrid materials (HYBRIMERs) have shown a great potential for planar and channel waveguides due to their high photosensitivity, low-cost processing good suitability doping. These been synthesized with content of titanium (40%) three different chelating agents: acetylacetone, methacrylic acid trifluoroacetic acid. The degree photopolymerization the methacrylate part changes nature agent. Trifluoroacetic are agents showing highest conversion. All coatings were...
Abstract Two perfluoroaryl sulfonates were tested as initiators for the extreme ultraviolet (EUV)‐promoted polymerization of silica‐based hybrid organic‐inorganic films containing epoxy moieties. One was able to strongly improve efficiency in materials and behaved much better than commercial photoacid generator diphenylsulfonium (4‐phenylthiophenyl)diphenylsulfonium triflate. Furthermore, lithographic patterns with sub‐micrometric resolutions achieved by irradiating resists selected...