A5004141723- Photonic and Optical Devices
- Molecular Junctions and Nanostructures
- Nanowire Synthesis and Applications
- Semiconductor Lasers and Optical Devices
- Nanopore and Nanochannel Transport Studies
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Nanofabrication and Lithography Techniques
- Analytical Chemistry and Chromatography
- Orbital Angular Momentum in Optics
- Electrowetting and Microfluidic Technologies
- Advanced Materials and Mechanics
- Micro and Nano Robotics
- Organic Electronics and Photovoltaics
- Graphene research and applications
- Drug Solubulity and Delivery Systems
- Near-Field Optical Microscopy
- Microfluidic and Capillary Electrophoresis Applications
- Analytical Methods in Pharmaceuticals
- Silicon Nanostructures and Photoluminescence
- Acoustic Wave Resonator Technologies
- Photonic Crystals and Applications
- Modular Robots and Swarm Intelligence
- Gene expression and cancer classification
- Advanced Fiber Optic Sensors
University of Notre Dame
2019-2024
University of Trento
2008-2014
University of Modena and Reggio Emilia
2011
The size of an ion affects everything from the structure water to life itself. In this report, gauge their size, ions dissolved in are forced electrically through a sub-nanometer-diameter pore spanning thin membrane and current is measured. measurements reveal ion-selective conductance that vanishes pores <0.24 nm diameter-the molecule-indicating permeating have grossly distorted hydration shell. Analysis noise power spectral density exposes threshold, below which independent current, beyond...
Abstract The modifications to the vibrational spectra produced by inclusion into cyclodextrins on of non‐steroidal anti–inflammatory drug ibuprofen, have been investigated means Raman scattering and numerical simulation. These changes are discussed explained comparison with theoretical wavenumbersfrequencies intensities obtained quantum classical simulations, disentangling effects directly related complexation process, from those be ascribed non‐covalent dimerization ibuprofen due hydrogen...
Channel waveguide-based evanescent-field optical sensors are developed to make a fully integrated chip biosensor. The system senses fluorescent analytes immobilized within micrometric sized bioreactor well realized an waveguide. main novelty of this work is related the fact that, well, excitation signal achieved by means evanescent field propagating through silicon oxynitride immobilization emitting molecules functionalization waveguide surface wet chemical method. These photonic biosensors...
This is a report on pilot study that tests the feasibility of assembling photonic metamaterials (PMs) using light gradient forces. Following strategy works like modular construction, forces, produced by tightly focused, 1D standing wave optical trap, time-multiplexed across 2D lattice are used to assemble voxels consisting prefabricated, monodispersed nanoparticles (NPs) with radii ranging from 30 500 nm into 3D structures hydrogel scaffold. Hundreds NPs can be manipulated concurrently...
Slot waveguides are very promising for optical sensing applications because of their peculiar spatial mode profile. In this paper we have carried out a detailed analysis confinement properties in slot realized low refractive index materials. We show that the sensitivity waveguide is not directly related to contrast high and materials forming waveguide. Thus, careful design structures allows realization devices even (e.g., polymers) be achieved. Advantages dielectrics terms cost,...
We describe the development of optical waveguides and adiabatic tapers based on SiON-glasses for a lab-on-chip device with fluorescence detection. Sensing is evanescent near-field excitation biomolecules captured surface thin waveguide. First, composition SiON was optimized to reduce losses visible light. Waveguides refractive index ~1.63 showed propagation ~0.8-0.9 dB/cm at 633 nm. A low loss taper developed convert efficiently light from multi mode waveguide into mono-modal one. Design...
One-dimensional photonic crystal structure is used for a slow light effect in coupled resonators optical horizontal slot waveguide with Si-nc. We report on design, simulations and preliminary transmission characterization around 1.55 mum.
Metamaterials were assembled using the force of a light gradient in one-dimensional Standing Wave Optical Trap (SWOT) that was time-shared across 2-D lattice to create three-dimensional (3D) array traps, which then populated with monodispersed dielectric or metallic nanoparticles (NPs). The NP structure anchored hydrogel scaffold, and process repeated macroscopic metamaterials. error particle position within voxel (σ=55 nm) limited by dark time Brownian motion, whereas between voxels, (σ=88...
When a denatured protein isoform (i.e., proteoform) immersed in electrolyte is impelled by an electric field through sub-nanometer-diameter pore sub-nanopore) spanning thin membrane, the sequence of amino acid (AA) residues constituting proteoform can be directly "read" one at time measuring fluctuations electrolytic current. Corroborating this assertion, analysis current with molecular dynamic (MD) simulations reveals that are correlated to AA volumes, water and mobility. After alignment...