11 documents found, page 1 of 2
Nanoscopic photoluminescence memory as a fingerprint of complexity in self-asse...
Carlos, L. D.; Amaral, V. S.; Silva, N. J.; Sá Ferreira, R. A.; Rocha, J.; De Zea Bermudez, V.; Nunes, S. C.; Santilli, C. [UNESP]Made available in DSpace on 2022-04-28T18:56:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-12-01; Phys. Dep. CICECO Aveiro University; Chem. Dep. CICECO Aveiro University; Chem. Dep. CQ-VR UTAD University; Chemistry Institute Unesp, Araraquara, S.P.; Chemistry Institute Unesp, Araraquara, S.P.
Hybrid sol-gel materials doped with AgY and NaY Zeolites
Gomes, B. R.; Pereira, R. F. P.; Nunes, S. C.; Fonseca, A. M.; Neves, Isabel C.; Figueira, R. B.The sol-gel process is a chemical synthesis often considered as a green technology due to mild conditions preparation since is waste-free and the processing temperature is generally low (e.g., close to room temperature). Also, uses compounds that do not introduce impurities into the end material and excludes the washing stage. Compared to other chemical routes, sol-gel method has several advantages in the desig...
Solar spectral conversion based on plastic films of lanthanide-doped ionosilica...
Cardoso, M. A.; Correia, S. F. H.; Frias, A. R.; Gonçalves, H. M. R.; Pereira, R. F. P.; Nunes, S. C.; Armand, M.; André, P. S.; de Zea Bermudez, V.The mismatch between the photovoltaic (PV) cells absorption and the solar irradiance on earth is one of the major limitations towards more efficient PV energy conversion. This aspect was addressed by down-shifting the solar irradiance on Earth through luminescent down-shifting layers based on lanthanide-doped surface-functionalized ionosilicas (ISs) embedded in poly(methyl methacrylate) (PMMA) coated on the sur...
Luminescent κ-Carrageenan-Based Electrolytes Containing Neodymium Triflate
Nunes, S. C.; Saraiva, S. M.; Pereira, Rui Francisco Gonçalves Pinto Fernandes; Silva, Maria Manuela; Carlos, L. D.; Almeida, P.; Gonçalves, M. C.In recent years, the synthesis of polymer electrolyte systems derived from biopolymers for the development of sustainable green electrochemical devices has attracted great attention. Here electrolytes based on the red seaweeds-derived polysaccharide κ-carrageenan (κ-Cg) doped with neodymium triflate (NdTrif<sub>3</sub>) and glycerol (Gly) were obtained by means of a simple, clean, fast, and low-cost procedure. ...
d-Poly(e-caprolactone) (530)/siloxane biohybrid films doped with protic ionic l...
Fernandes, M.; Cardoso, M. A.; Rodrigues, L. C.; Silva, Maria Manuela; Ferreira, R. A. S.; Carlos, L. D.; Nunes, S. C.; de Zea Bermudez, V.Organic/inorganic biohybrids composed of poly(ε-caprolactone) (PCL(530)) (where 530 represents the average molecular weight of the chains in gmol−1 ) chains covalently bonded to a siloxane network via urethane linkages and incorporating protic ionic liquids (PILs) were investigated. The materials (H-PILX, where H represents the host hybrid matrix and X is the ratio, in %, of the mass of PIL per mass of organic ...
Di-amidosils with tunable structure, morphology and emission quantum yield: the...
Nunes, S. C.; Huemmer, J.; Freitas, V. T.; Ferreira, R. A. S.; Carlos, L. D.; Almeida, P.; de Zea Bermudez, V.Tailoring of the structure (from amorphous to highly ordered lamellar), morphology (from a homogenous texture to fibers, microparticles, seaweeds- and desert rose-like shapes) and photoluminescence features of five di-amide crossed-linked decyl/siloxanes (di-amidosils, d-A(10)) was achieved via sol-gel chemistry and self-assembly from a single precursor through a fine control of the reaction conditions (water c...
Di-amidosils with tunable structure, morphology and emission quantum yield: the...
Nunes, S. C.; Huemmer, J.; Freitas, V. T.; Ferreira, R. A. S.; Carlos, L. D.; Almeida, P.; de Zea Bermudez, V.Correction for ‘Di-amidosils with tunable structure, morphology and emission quantum yield: the role of hydrogen bonding’ by S. C. Nunes et al., J. Mater. Chem. C, 2015, 3, 6844–6861.
Fractality and metastability of a complex amide cross-linked dipodal alkyl/silo...
Nunes, S. C.; Ferreira, C. B.; Ferreira, R. A. S.; Carlos, L. D.; Ferro, M. C.; Mano, J. F.; Almeida, P.; de Zea Bermudez, V.A novel room-temperature white light emitter amide-cross linked alkyl/siloxane hybrid material (amidosil A) was produced by self-organization through the rational design of the precursor. This hybrid displays a highly complex hierarchical architecture composed of two lamellar bilayer structures, the relative spatial arrangement of which yields a multiplicity of ordered nanodomains with variable shapes and sizes...
Fractality and metastability of a complex amide cross-linked dipodal alkyl/silo...
Nunes, S. C.; Ferreira, C. B.; Ferreira, R. A. S.; Carlos, L. D.; Ferro, M. C.; Mano, J. F.; Almeida, P.; Bermudez, V. de ZeaA novel room-temperature white light emitter amide-cross linked alkyl/siloxane hybrid material (amidosil A) was produced by self-organization through the rational design of the precursor. This hybrid displays a highly complex hierarchical architecture composed of two lamellar bilayer structures, the relative spatial arrangement of which yields a multiplicity of ordered nanodomains with variable shapes and sizes...
Lamellar mono-amidosil hybrids doped with Rhodamine (B) methyl ester perchlorate
Nunes, S. C.; Freitas, V. T.; Ferreira, R. A. S.; Carlos, L. D.; Almeida, P.; de Zea Bermudez, V.Ordered mono-amide cross-linked alkyl/siloxane hybrids (mono-amidosils) incorporating a Rhodamine (B) methyl ester perchlorate dye (Rh(B) CH3ClO4) have been synthesized through the sol-gel process and self-directed assembly. The host hybrid matrix m-A(14) is a lamellar bilayer hierarchically structured hybrid composed of short methyl-capped alkyl chains grafted to a siliceous framework through amide groups. At ...