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161.
S. Harada Y. Inada G.-Q. Zheng 《Physica C: Superconductivity and its Applications》2010,470(20):1089-1091
We report the 11B and 195Pt NMR measurements in non-centrosymmetric superconductors Li2(Pd1−xPtx)3B (x = 0.0, 0.2, 0.5, 1.0). From the measurements of spin–lattice relaxation time (T1), we found that there was a coherence peak (CP) just below superconducting transition temperature (Tc) for x = 0–0.5 but no CP in x = 1. We demonstrated that the system for x = 0–0.5 were BCS superconductors but there existed line node in the superconducting gap for x = 1.0. The 195Pt Knight Shift in x = 0.2 decreased below Tc, indicating spin-singlet state. The results showed that BCS superconducting state evolves into an exotic state with line-nodes in the gap function when x is increased, as the spin–orbit coupling is enhanced. 相似文献
162.
Adriano de Souza Carolino Matheus Moraes Biondo tefan lu Henrique Duarte da Fonseca Filho Pedro Henrique Campelo Jaqueline de Araújo Bezerra Cicero Mota Hidembergue Ordozgoith da Frota Vanderlei Salvador Bagnato Natalia Mayumi Inada Edgar Aparecido Sanches 《Molecules (Basel, Switzerland)》2022,27(15)
The development of conjugated polymer-based nanocomposites by adding metallic particles into the polymerization medium allows the proposition of novel materials presenting improved electrical and optical properties. Polyaniline Emeraldine-salt form (ES–PANI) has been extensively studied due to its controllable electrical conductivity and oxidation states. On the other hand, tungsten oxide (WO3) and its di-hydrated phases, such as WO3·2H2O, have been reported as important materials in photocatalysis and sensors. Herein, the WO3·2H2O phase was directly obtained during the in-situ polymerization of aniline hydrochloride from metallic tungsten (W), allowing the formation of hybrid nanocomposites based on its full oxidation into WO3·2H2O. The developed ES–PANI–WO3·2H2O nanocomposites were successfully characterized using experimental techniques combined with Density Functional Theory (DFT). The formation of WO3·2H2O was clearly verified after two hours of synthesis (PW2 nanocomposite), allowing the confirmation of purely physical interaction between matrix and reinforcement. As a result, increased electrical conductivity was verified in the PW2 nanocomposite: the DFT calculations revealed a charge transfer from the p-orbitals of the polymeric phase to the d-orbitals of the oxide phase, resulting in higher conductivity when compared to the pure ES–PANI. 相似文献
163.
Johan Sebastián Díaz Tovar Dr. Giulia Kassab Dr. Natalia Mayumi Inada Prof. Dr. Vanderlei Salvador Bagnato Prof. Dr. Cristina Kurachi 《Chemphyschem》2023,24(18):e202300381
Indocyanine green is an attractive molecule for photodynamic therapy due to its near infrared absorption, resulting in a higher tissue penetration. However, its quantum yields of the triplet and singlet state have been reported to be low and then, reactive oxygen species are unlikely to be formed. Aiming to understand the ICG role in photodynamic response, its photobleaching behavior in solution has been studied under distinct conditions of CW laser irradiation at 780 and 808 nm, oxygen saturations and solvents. Sensitizer bleaching and photoproduct formation were measured by absorption spectroscopy and analyzed using the PDT bleaching macroscopic model to extract physical parameters. ICG photobleaching occurs even at lower oxygen concentrations, indicating that the molecule presents more than one way of degradation. Photoproducts were produced even in solution of less than 4 % oxygen saturation for both solvents and excitation wavelengths. Also, the amplitude of absorption related to J-dimers was increased during irradiation, but only in 50 % PBS solution. The formation of photoproducts was enhanced in the presence of J-type dimers under low oxygen concentration, and the quantum yields of triplet and singlet states were one order of magnitude and two times higher, respectively, when compared to ICG in distilled H2O. 相似文献
164.