Search Results - "Costa, Sílvia M. B."

Fluorescence Spectroscopy of Porphyrins and Phthalocyanines: Some Insights into Supramolecular Self-Assembly, Microencapsulation, and Imaging Microscopy by Teixeira, Raquel, Serra, Vanda Vaz, Botequim, David, Paulo, Pedro M. R., Andrade, Suzana M., Costa, Sílvia M. B.

“…The molecular interactions of anionic tetrasulfonate phenyl porphyrin (TPPS) with poly(amido amine) (PAMAM) dendrimers of generation 2.0 and 4.0 (G2 and G4,…”
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Tip-Specific Functionalization of Gold Nanorods for Plasmonic Biosensing: Effect of Linker Chain Length by Paulo, Pedro M. R, Zijlstra, Peter, Orrit, Michel, Garcia-Fernandez, Emilio, Pace, Tamara C. S, Viana, Ana S, Costa, Sílvia M. B

“…Gold nanorods are promising platforms for label-free biosensing. We have functionalized gold nanorods with biotin thiol linkers of increasing chain length and…”
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Extreme Enhancement of Single-Molecule Fluorescence from Porphyrins Induced by Gold Nanodimer Antennas by Francisco, Alexandra P, Botequim, David, Prazeres, Duarte M. F, Serra, Vanda V, Costa, Sílvia M. B, Laia, César A. T, Paulo, Pedro M. R

“…Porphyrins are typically weak emitters, which presents challenges to their optical detection by single-molecule fluorescence microscopy. In this contribution,…”
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Fluorescent dye nano-assemblies by thiol attachment directed to the tips of gold nanorods for effective emission enhancement by Botequim, David, Silva, Inês I R, Serra, Sofia G, Melo, Eduardo P, Prazeres, Duarte M F, Costa, Sílvia M B, Paulo, Pedro M R

“…The conjugation of dye-labelled DNA oligonucleotides with gold nanorods has been widely explored for the development of multifunctional fluorescent nanoprobes…”
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Enhanced Fluorescence of a Dye on DNA-Assembled Gold Nanodimers Discriminated by Lifetime Correlation Spectroscopy by Paulo, Pedro M. R., Botequim, David, Jóskowiak, Agnieszka, Martins, Sofia, Prazeres, Duarte M. F., Zijlstra, Peter, Costa, Sílvia M. B.

“…The surface plasmon modes of metal nanoparticles provide a way to efficiently enhance the excitation and emission from a fluorescent dye. We have employed…”
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Core-Assisted Formation of Porphyrin J-Aggregates in pH-Sensitive Polyelectrolyte Microcapsules Followed by Fluorescence Lifetime Imaging Microscopy by Vaz Serra, Vanda, Neto, Nuno G. B, Andrade, Suzana M, Costa, Sílvia M. B

“…A strategy assisted by an inorganic template was developed to promote the organized self-assembly of meso-(tetra­kis)-(p-sulfo­nato­phenyl)­porphyrin (TPPS) on…”
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Structural Effects of the β‑Vinyl Linker in Pyridinium Porphyrins: Spectroscopic Studies in Organic Solvents and AOT Reverse Micelles by Vaz Serra, Vanda, Andrade, Suzana M, Silva, Eduarda M. P, Silva, Artur M. S, Neves, Maria G. P. M. S, Costa, Sílvia M. B

“…Two isomeric β-vinylpyridinium porphyrins, 2-[2-(2-methylpyridinium)vinyl]-5,10,15,20-tetraphenylporphyrin (1, ortho isomer) and…”
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Photoluminescence Dynamics of CdSe QD/Polymer Langmuir–Blodgett Thin Films: Morphology Effects by Martín-García, Beatriz, Paulo, Pedro M. R, Costa, Sílvia M. B, Velázquez, M. Mercedes

“…Thin films of colloidal semiconductor CdSe quantum-dots (QDs) and a styrene/maleic anhydride copolymer were prepared by the Langmuir–Blodgett technique and…”
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Merging Porphyrins with Gold Nanorods: Self Assembly Construct to High Fluorescent Polyelectrolyte Microcapsules by Serra, Vanda Vaz, Serra, Sofia G, Vallejo, Mariana C S, Paulo, Pedro M R, Moura, Nuno M M, Botequim, David, Neves, Maria Graça P M S, Costa, Sílvia M B

“…Dual probe porphyrin-gold nanorod polyelectrolyte microcapsules were developed to explore the enhancing effects of a plasmonic interface of self-assembled gold…”
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Plasmon-Enhanced Emission of a Phthalocyanine in Polyelectrolyte Films Induced by Gold Nanoparticles by Teixeira, Raquel, Paulo, Pedro M. R, Viana, Ana S, Costa, Sílvia M. B

“…We report on the plasmon-enhanced fluorescence emission achieved in an organic/inorganic hybrid multilayered polyelectrolyte film incorporating aluminum…”
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Molecular Dynamics Simulations of Charged Dendrimers:  Low-to-Intermediate Half-Generation PAMAMs by Paulo, Pedro M. R, Lopes, José N. Canongia, Costa, Sílvia M. B

“…We have performed atomistic molecular dynamics simulations of PAMAM dendrimers of generations 0.5, 1.5, 2.5, 3.5, and 4.5. The simulated systems comprise the…”
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Electronic Excited-State Behavior of Rhodamine 3B in AOT Reverse Micelles Sensing Contact Ion Pair to Solvent Separated Ion Pair Interconversion by Ferreira, José A. B, Costa, Sílvia M. B

“…The amphiphile Aerosol OT (1,4-bis(2-ethylhexyl)sodium sulfosuccinate, AOT) forms, in reverse micellar nanoaggregates of water, RM, in isooctane, ion pairs…”
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Polyelectrolyte-Assisted Noncovalent Functionalization of Carbon Nanotubes with Ordered Self-Assemblies of a Water-Soluble Porphyrin by Andrade, Suzana M., Raja, Perumal, Saini, Vipin K., Viana, Ana S., Serp, Philippe, Costa, Sílvia M. B.

“…The self‐assembly and induced supramolecular chirality of meso‐tetrakis(4‐sulfonatophenyl)porphyrin (TSPP) on both single‐wall (SWCNT) and multiwall carbon…”
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Molecular Dynamics Simulations of Porphyrin−Dendrimer Systems: Toward Modeling Electron Transfer in Solution by Paulo, Pedro M. R, Lopes, José N. Canongia, Costa, Sílvia M. B

“…We have performed computational simulations of porphyrin−dendrimer systemsa cationic porphyrin electrostatically associated to a negatively charged…”
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Interaction of Zinc Tetrasulfonated Phthalocyanine with Cytochrome c in Water and Triton-X 100 Micelles by Laia, César A. T, Costa, Sílvia M. B

“…The interaction of a zinc tetrasulfonated phthalocyanine with cytochrome c was studied using steady-state spectroscopic techniques and time-correlated single…”
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Gold Nanoparticles in Core–Polyelectrolyte–Shell Assemblies Promote Large Enhancements of Phthalocyanine Fluorescence by Teixeira, Raquel, Paulo, Pedro M. R, Costa, Sílvia M. B

“…We have incorporated gold nanoparticles into a core–polyelectrolyte–shell type of assembly with a coating lipid vesicle encapsulating a phthalocyanine dye. The…”
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Self-organization of a sulfonamido-porphyrin in Langmuir monolayers and Langmuir-Blodgett films by Togashi, Denisio M, Romão, Rute I S, Gonçalves da Silva, Amélia M, Sobral, Abilio J F N, Costa, Sílvia M B

“…Langmuir monolayers (LM) and Langmuir-Blodgett (LB) films of pure lipophilic meso-tetra(4-dodecylaminosulfophenyl)porphyrin (PC12) and mixed with the anionic…”
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Single-Molecule Fluorescence of a Phthalocyanine in PAMAM Dendrimers Reveals Intensity−Lifetime Fluctuations from Quenching Dynamics by Paulo, Pedro M. R, Costa, Sílvia M. B

“…We report on single-molecule fluorescence of an aluminum phthalocyanine dye associated with PAMAM dendrimers at a glass surface. The fluorescence decays of the…”
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Unfolding Kinetics of β-Lactoglobulin Induced by Surfactant and Denaturant: A Stopped-Flow/Fluorescence Study by Viseu, Maria Isabel, Melo, Eduardo P., Carvalho, Teresa Isabel, Correia, Raquel F., Costa, Sílvia M.B.

“…The β→ α transition of β-lactoglobulin, a globular protein abundant in the milk of several mammals, is investigated in this work. This transition, induced by…”
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Interactions in Noncovalent PAMAM/TMPyP Systems Studied by Fluorescence Spectroscopy by Paulo, Pedro M. R, Costa, Sílvia M. B

“…Steady-state absorption and emission spectroscopy and time-resolved fluorescence measurements were employed in the study of…”
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