A5060665549- Nonlinear Optical Materials Research
- Nonlinear Optical Materials Studies
- Textile materials and evaluations
- Advanced Sensor and Energy Harvesting Materials
- Photochemistry and Electron Transfer Studies
- Optical measurement and interference techniques
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Porphyrin and Phthalocyanine Chemistry
- Crystal structures of chemical compounds
- Crystallography and molecular interactions
- Crystallization and Solubility Studies
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Laser-Matter Interactions and Applications
- Industrial Vision Systems and Defect Detection
- Thermoregulation and physiological responses
- Cold Atom Physics and Bose-Einstein Condensates
- Spectroscopy and Quantum Chemical Studies
- Advanced Fiber Optic Sensors
- Quantum Dots Synthesis And Properties
- Spectroscopy and Laser Applications
- Photochromic and Fluorescence Chemistry
- Photorefractive and Nonlinear Optics
- Electrospun Nanofibers in Biomedical Applications
University of Minho
2016-2025
Clinical Academic Center of Braga
2017-2020
Instituto de Biologia Molecular e Celular
2019
i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto
2019
Bellingham Technical College
2017
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
1994
University of Oregon
1991-1992
California State University, Long Beach
1990-1991
National Institute of Standards and Technology
1983-1988
Joint Institute for Laboratory Astrophysics
1983-1988
Recent measurements using two-dimensional electronic spectroscopy (2D ES) have shown that the initial dynamic response of photosynthetic proteins can involve quantum coherence. We show how coherence be differentiated from vibrational in 2D ES. On basis we conclude both and coherences are observed phycobiliprotein light-harvesting complex PC645 Chroomonas sp. CCMP270 at ambient temperature. These antenna cryptophyte algae suspended lumen, where pH drops significantly under sustained...
We report on the synthesis of ZnO nanoplates and nanoplate/Ag nanoparticle heterostructures <italic>via</italic> a simple cost effective wet chemical precipitation method.
New dicyanovinyl-substituted 1-(alkyl)aryl-2-(2'-thienyl)pyrroles 2 were synthesized and characterized. The solvatochromic behavior of the compounds was investigated. All derivatives showed reversible oxidation reduction on CV time scale. hyperpolarizabilities (β) measured using hyper-Rayleigh scattering. results are among highest β values reported for donor−acceptor-substituted thienylpyrroles.
This work explores the self-assembly and optical properties of a novel chiral, aromatic-rich Boc-Phe-Phe dipeptide derivative functionalized with benzothiazole bicyclic ring, which forms supramolecular structures. Leveraging well-known self-assembling capabilities diphenylalanine dipeptides, this modified introduces heterocyclic unit that significantly enhances fluorescence resulting nanostructures. The derivative’s rich aromatic character drives formation structures through...
In recent decades, substantial progress has been made in embedding molecules, nanocrystals, and nanograins into nanofibers, resulting a new class of hybrid functional materials with exceptional physical properties. Among these materials, nanofibers exhibiting ferroelectric, piezoelectric, pyroelectric, multiferroic, nonlinear optical characteristics, have attracted considerable attention undergone improvements. This review critically examines developments, focusing on strategies for...
This work explores the self-assembly and optical properties of a novel chiral, aromatic-rich Boc-Phe-Phe dipeptide derivative functionalized with benzothiazole bicyclic ring that forms supramolecular structures. Leveraging well-known self-assembling capabilities diphenylalanine dipeptides, this modified introduces heterocyclic unit significantly enhances fluorescence resulting nanostructures. The derivative's rich aromatic character drives formation structures through self-organization...
(Boc=tert-butoxycarbonyl)-p-nitro-L-phenylalanyl-p-nitro-L-phenylalanine, a dipeptide characterised by acentric symmetry, self-assembles into microtapes. This study explores its thermal, structural, and nonlinear optical properties. Thermogravimetric analysis reveals an onset degradation temperature of 190 ºC,...
Abstract A series of nonlinear optical chromophores 6 containing a substituted benzothiazole ring have been synthesized and characterized. 1,3‐Benzothiazoles were prepared by treating various formyl derivatives thienyl compounds with ortho ‐aminobenzenethiol in fair to excellent yields. These turn Suzuki coupling between aryl precursors. The electronic interactions donor acceptor end groups the conjugated 1,3‐benzothiazoles are revealed intense markedly solvatochromic CT transitions....
We have measured whole-pulse photon statistics of macroscopic twin pulses light generated by coherently seeding a two-mode optical parametric amplifier equally in each mode. are able to produce 300 ps, near-transform-limited (\ensuremath{\sim}${10}^{6}$ photons) with difference number having variance be 73% below the shot-noise level. probability distributions photoelectron number, which only regime cannot explained using standard semiclassical detection theory.
Electrospinning of an aqueous poly(vinyl alcohol) and glycine solution has been used to produce nanofibers with embedded crystalline exclusively in the form β polymorph. The β-glycine nanocrystals are highly oriented within polymer fibers present good polar properties. Piezoelectric nonlinear optical responses have quantitatively examined showing piezoelectric coefficient deff = 12.5 pm/V effective susceptibility two times greater than that potassium dihydrogen phosphate (KDP). Additionally,...
In-plane aligned nanofibers of organic 2-methyl-4-nitroaniline (MNA) were produced by the electrospinning technique using a 1:1 weight ratio with poly(l-lactic acid). The fibers are capable enormous efficient optical second harmonic generation as strong pure MNA crystals in powder form. Structural, spectroscopic, and polarimetry studies show that crystallizes within an orientation which aromatic rings predominantly orientated edge-on respect to plane fiber array their dipole moments axis....
Stimulated emission depletion (STED) fluorescence microscopy squeezes an excited spot well below the wavelength scale using a doughnut-shaped beam. To generate doughnut, scale-free vortex phase modulation (2D-STED) is often used because it provides maximal transverse confinement and radial-aberration immunity (RAI) to central dip. However, RAI also means blindness defocus term, making axial origin of photons uncertain within provided by confocal detection pinhole. Here, reduce uncertainty,...