A5042082156- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Nonlinear Optical Materials Studies
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Photonic Crystals and Applications
- Biosensors and Analytical Detection
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Proteomics Techniques and Applications
- Advanced Photocatalysis Techniques
- Mechanical and Optical Resonators
- Air Quality Monitoring and Forecasting
- Gas Sensing Nanomaterials and Sensors
- Recycling and utilization of industrial and municipal waste in materials production
- Nanowire Synthesis and Applications
- Coal and Its By-products
- Melamine detection and toxicity
- Chemical Synthesis and Analysis
- Analytical Chemistry and Sensors
- Thermal Radiation and Cooling Technologies
- Laser Material Processing Techniques
- Copper-based nanomaterials and applications
- Ultrasound and Hyperthermia Applications
- Near-Field Optical Microscopy
National Interuniversity Consortium of Materials Science and Technology
2018-2021
Material Physics Center
2019
Piaggio (Italy)
2019
Piaggio Aerospace (Italy)
2019
Italian Institute of Technology
2019
Università Cattolica del Sacro Cuore
2019
Interface (United States)
2019
Brescia University
2014-2019
University of Brescia
2014-2018
National Institute of Optics
2018
Biosensing based on nanophotonic structures has shown a great potential for cost-efficient, high-speed and compact personal medical diagnostics. While plasmonic nanosensors offer high sensitivity, their intrinsically restricted resonance quality factors strong heating due to metal absorption impose severe limitations real life applications. Here, we demonstrate an all-dielectric sensing platform silicon nanodisks with optically-induced magnetic resonances, which are able detect concentration...
SiO2/TiO2 core/shell beads (T-rex) were designed, fabricated and tested for Raman detection of environmental CO2 under real-working conditions, as those encountered, example, in solar-to-fuel conversion reactions. The exploitation light trapping morphology dependent resonances was crucial extending the limit adsorbed on TiO2 surfaces. T-rex allowed achieving surface enhanced scattering (SERS) without using plasmonic metals showing high-efficiency, fast response reproducibility both air...
Colloidal lenses can be easily implemented into conventional microspectroscopy experiments as universal, disposable Raman scattering enhancers.
Abstract All‐dielectric materials are emerging as a new class of substrates for enhanced Raman scattering. As ohmic losses reduced in the absence plasmonic metals, data obtained with dielectrics very reproducible and reliable. This mini‐review summarizes our recent work field core/shell dielectric resonators designed purposes, special focus on SiO 2 /TiO (T‐rex) beads. These systems able to exploit evanescent generated by total internal reflection multiple scattering light at...
Abstract SiO 2 /TiO core/shell (T-rex) beads were exploited as “all-in-one” building-block materials to create analytical assays that combine plasmon-free surface enhanced Raman scattering (SERS) and assisted laser desorption/ionization (SALDI) mass spectrometry (RaMassays). Such a multi-modal approach relies on the unique optical properties of T-rex beads, which are able harvest manage light in both UV Vis range, making ionization more efficient. RaMassays successfully applied detection...
This paper reports an experimental investigation of surface-enhanced Raman scattering in high-density Si nanowire arrays obtained by electroless etching. A direct relationship between light trapping capabilities nanowires and enhanced was demonstrated. Optimized allowed for a remarkable increase sensitivity comparison to reference planar samples. As result, the detection limit molecular probes under resonant excitation (e.g. methylene blue) can be extended three orders magnitude. In...
Rohit Chikkaraddy opened the discussion of Introductory Lecture: Regarding quantifying chemical enhancement, you showed a systematic change in SERS enhancement for halide substituted molecules due to charge transfer from metal. Is extra an inherent increas
A sustainable economy can be achieved only by assessing processes finalized to optimize the use of resources. Waste a relevant source energy thanks energy-from-waste processes. Concerns regarding toxic fly ashes solved transforming them into resource as recycled materials. The commitment recycle is driven need conserve natural resources, reduce imports raw materials, save landfill space and pollution. new method stabilize ash from Municipal Solid Incinerator (MSWI) at room temperature has...
Silicon is one of the most interesting candidates for plasmon-free surface-enhaced Raman scattering (SERS), because its high-refractive index and thermal stability. However, here we demonstrate that alleged stability silicon nanoshells irradiated by conventional laser cannot be taken granted. We investigated opto-thermal behavior SiO2/Si core/shell microbeads (Si-rex) with three common sources (λ = 532, 633, 785 nm) under real working conditions. obtained an experimental proof critical role...
Binder and effector molecules that allow studying manipulating epigenetic processes are of biological relevance pose severe technical challenges. We report the first example a synthetic receptor able to recognize mono-methylated lysines in histone H3 tail peptide, which has relevant functions regulation. Recognition is robust specific regardless position number along polypeptide chain. The peptide captured solution by tetraphosphonate cavitand (Tiiii) selectively binds its Lys-NMe+ moieties....
The photo-induced heat generation in SiO<sub>2</sub>/Si core/shell nanoantennas is analysed on the basis of their optothermal properties.
We report the observation of whispering-gallery modes in 2 μm-sized SiO2/ZrO2 core/shell beads utilized as all-dielectric Raman enhancers. This allows us to achieve simultaneous optical and ultrasensitive detection with a single spectral analysis. opportunity opens exciting perspectives for multimodal chemical sensing fabrication fiber devices.
The synthesis of hybrid metallic-dielectric substrates as reliable SERS platforms relies on core-shell nanoparticles, obtained by wet chemistry, with an outer dielectric shell composed SiO2 or TiO2. Apart from the composition, nanoparticle density and aggregation type strongly affect surface-enhanced SERS. Going beyond a single layer building random aggregates NPs would result in step forward production platforms. Here we achieve fabrication 3D nanogranular film Ag metallic cores not fully...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. Guasoni, N. Bontempi, D. Neshev, L. Carletti, Rocco, I. Alessandri, and C. De Angelis, "Design of All-Dielectric Photonic Crystals for Surface-Enhanced Raman Scattering," in Photonics Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Technical Digest (online) (Optica Publishing Group, 2016), paper NW3A.3. Export BibTex Endnote (RIS) HTML Plain alert Save article
We demonstrate new direction in biosensing based on bio-compatible, non-toxic, robust and low-loss dielectric nanoantennas. Using biotin-coated silicon nanodisks with optically-induced magnetic resonances we detect streptavidin concentration as low 10−10 mol/L.
We suggest a new platform for highly efficient biosensing using nontoxic, low loss silicon nanoresonators. demonstrate low-concentration detection limit of 10−10 M streptavidin biotin-coated nanodisks with Mie-type magnetic dipole resonances.
We demonstrate that conductometric gas sensing at room temperature with SnO2 nanowires is enhanced by visible and supra bandgap UV irradiation when only the metal oxide are decorated Ag nanoparticles (r < 20 nm); no enhancement observed for bare case. combine spectroscopic techniques to study wavelength dependency of sensors response, showing a strict correlation between loaded optical absorption its response as function wavelength. Our results lead hypothesis under UV-vis light effect...
Here we investigate for the first time opto-thermal behavior of SiO 2 /Si core/shell microbeads (Si-rex) irradiated with three common Raman laser sources (lambda=532, 633, 785 nm) under real working conditions. We obtained an experimental proof critical role played by bead size and aggregation in heat light management, demonstrating that case strong coupling temperature can exceed melting points both core shell components. In addition, also show weakly coupled beads be utilized as stable...
<p>Here we investigate for the first time opto-thermal behavior of SiO<sub>2</sub>/Si core/shell microbeads (Si-rex) irradiated with three common Raman laser sources (lambda=532, 633, 785 nm) under real working conditions. We obtained an experimental proof critical role played by bead size and aggregation in heat light management, demonstrating that case strong coupling temperature can exceed melting points both core shell components. In addition, also show weakly coupled...