Materials Literature
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Multiple Exciton Generation (MEG) in nanoparticle-based solar cells promises to increase the cell-efficiency above the Shockley–Queisser limit. However, utilizing MEG is hampered by the Quantum Confinement Dilemma (QCD): quantum confinement advantageously increases the effective Coulomb interaction, but at the same ti…
A novel blue-emitting LaOCl:Eu2+ phosphor has been successfully synthesized using the solid-state reaction. In addition, Ce3+ and Tb3+ activated LaOCl phosphors have been prepared and compared with the LaOCl:Eu2+ phosphor. FE-SEM images clearly indicate that the LaOCl:Eu2+ phosphor has a lamellar structure. XRD result…
Ultrabroadband near-infrared luminescence in the 1.0–2.4 μm range has been observed in bismuth (Bi)-doped oxyfluoride germanate thin films prepared by pulsed laser deposition (PLD). The emission peak position shows a red-shift with decreasing oxygen pressure during PLD growth. Systematic investigation reveals that the…
The water-stable branched gold nanoparticles coated with a PNIPAM shell allow pyrene SERS detection at a concentration of 0.13 μM.
Wavelength dependent electron and hole distribution and dynamics of nanorod heterostructures leads to competing photoreduction pathways with different charge separation and recombination rates and steady state photoreduction quantum efficiencies.
This highlight summarizes current advances in the design and the employment of nanostructured materials in SERS substrates especially from the dimensional point of view. We then talk about synthesis methods and the novel properties of these nanostructured materials with their potential applications in SERS.
MSN) and the leakage of the drug is only 16% at pH 7.4 phosphate-buffered saline for 72 h. Simultaneously, the DOX release percentage can reach 54% by decreasing the pH to 5.5. In contrast, unsealed MSNs show a fast DOX release rate at pH 7.4 and a slight pH-response. Confocal laser scanning microscopy demonstrates th…
Photoluminescent properties of four low-dimensional [(CuI) <sub>x</sub> L] <sub>n</sub> complexes were investigated in the solid state at ambient temperature. A photoluminescence quantum yield of 73% was recorded for [(CuI) <sub>2</sub> (46dmpm)] <sub>n</sub> .
High quality, nanostructured Bi2Te3, with an unprecedented degree of positional and orientational control of the material form on the nanoscale, is readily obtained by low pressure chemical vapour deposition using a new molecular precursor. This system offers a convenient method that delivers key structural requiremen…
High-density electrodes allow aqueous-based supercapacitors to attain energy densities comparable to those of commercially-available organic-based supercapacitors with 10–100× greater power.
We present a quantitative analysis of the correlation between quasi-localized, low energy vibrational modes and structural relaxation events in computer simulations of a quiescent, thermal polymer glass. Our results extend previous studies on glass forming binary mixtures in 2D, and show that the soft modes identify r…
In this work, we developed a green and facile approach to prepare graphene by the reduction of graphite oxide (GO) using two Chinese medicinal herbs: inulin and Chinese wolfberry. The reduced products were systematically characterized by UV-visible absorption spectroscopy, X-ray diffraction, X-ray photoelectron spectr…
Polyaniline nanotubes have been prepared in a facile manner via the chemical polymerization of aniline in an aqueous medium using ammonium persulphate (APS) and ten different dopant acids. The formation of PANI in the composite was confirmed using 1H-NMR, UV-Vis and FTIR spectroscopic studies. An intensive FESEM inves…
The primary and secondary relaxation timescales of aging colloidal suspensions of Laponite are estimated from intensity autocorrelation functions obtained in dynamic light scattering (DLS) experiments. The dynamical slowing down of these relaxation processes are compared with observations in fragile supercooled liquid…
Silicon-process compatible metasurface was designed and tested in the infrared wavelength range. These metasurfaces show very high Q (>100), extreme chirality, and polarization conversion along with very low-loss operation. They show promise for sensing applications as well as spectrally selective CP thermal emitte…
A series of ten mononuclear lanthanoid containing phosphotungstate clusters were synthesized by the reaction of the dilacunary ligand [P2W19O69(H2O)](14-) with Ln(NO3)3·xH2O in a potassium acetate buffer (pH 4.8), leading to the formation of Peacock and Weakley type dimers [Ln(PW11O39)2](11-) (Ln = Pr(3+) (1), Nd(3+)…
We developed a chiral 1,1'-bi-2-naphthol-bridged imidazole dimer possessing 100 μs fast photochromism and high fatigue resistance. It offers great opportunities for the practical applications to fast photoresponsive chiral dopants, invisible security materials and optical trigger molecules to induce the dynamic struct…
This paper presents a research on the thermal degradation of typical polymer insulation materials extruded polystyrene (XPS) under both oxidizing gas air and non-oxidizing gas nitrogen. The Kissinger-Akahira-Sunose method was employed to calculate the activation energy values according to thermogravimetic analysis (TG…
The [001]-oriented cuboid-shaped Bi <sub>2</sub> Fe <sub>4</sub> O <sub>9</sub> with an indirect bandgap of 1.29 eV and strong absorption in all solar spectrum shows distinct photocurrent as photoanode.
We present a frequency-selective surfaces (FSS) transparent window exhibiting low losses for broadband spectroscopic and imaging measurements in terahertz (THz) frequencies. The intent is to replace existing samples holders (e.g., Z-cut crystal quartz) with transparent metamaterial windows and increase measurement sen…