Materials Literature
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Abstract Four new superconducting and metallic salts of the family of organic molecular conductors (BEDT‐TTF) 4 A I [Fe III (C 2 O 4 ) 3 ]G [A = H 3 O + ; G = 2‐chloropyridine ( 1 ), 2‐bromopyridine ( 2 ), 3‐chloropyridine ( 3 ), and 3‐bromopyridine ( 4 ); BEDT‐TTF = bis(ethylenedithio)tetrathiafulvalene] have been pr…
Plasma polymers are often limited by their susceptibility to spontaneous and photo‐oxidation. We show that the unusual photoluminescence (PL) behavior of a plasma polymer of trans ‐2‐butene is correlated with its PL strength. These photo‐processes occur under blue light illumination (λ = 405 nm), distinguishing them f…
A surface atomic‐ligand exchange method is applied the first time in the construction of photodetectors (PDs) based on PbS quantum dots (QDs) for ultrasensitivity. The device thus produces a high photosensitivity to visible and near‐infrared light with a photoresponsivity up to 7.5 × 10 3 A W −1 and a high stability i…
A molecular dyad that can photosensitize and visualize singlet oxygen ((1)O2) was developed. The dual photofunction enables ratiometric photoluminescence monitoring of the progress of (1)O2-induced cell death.
We report a self-referenced ratiometric nanothermometer based on short conjugated polyelectrolytes. An amphiphilic macromolecule destabilizes the polymer π-π stacking and makes it possible to shift the equilibrium between the less emissive aggregated state (520 nm) and the brighter individual chain (450 nm) within 20.…
We report a type of solar cell based on graphene/CdTe Schottky heterostructure, which can be improved by surface engineering as graphene is atomic thin. By coating a layer of ultrathin CdSe quantum dots onto graphene/CdTe heterostructure, the power conversion efficiency is increased from 2.08% to 3.10%. Photo-induced…
Microlenses with multiple focal lengths play an important role in three-dimensional imaging and the real-time detection of unconfined or fluctuating targets. In this Letter, we present a novel method of fabricating lens-on-lens microstructures (LLMs) using a two-step femtosecond laser wet etching process. A 3×3 LLM ar…
Through the combination of polyhedral oligosilsesquioxane (POSS) and a lanthanide complex, a hybrid material with enhanced luminescent properties was achieved. FTIR, XRD, SEM, and photoluminescence spectroscopy were employed to characterize the obtained material. Improved photo- and thermal-stability were observed in…
Thin films of cobalt oxide are deposited by atomic layer deposition using dicobalt octacarbonyl [Co2(CO)8] and ozone (O3) at 50 °C on microscope glass substrates and polished Si(111) wafers. Self-saturated growth mechanism is verified by x-ray reflectivity measurements. As-deposited films consist of both the crystalli…
New lead‐free (100− x )Li 0.12 Na 0.88 NbO 3 ‐ x BaTiO 3 (0 ≤ x ≤ 40) piezoelectric ceramics have been synthesized using conventional ceramics processing route. Structural analysis revealed an existence of morphotropic phase boundary ( MPB ), separating orthorhombic and tetragonal phases, between the BaTiO 3 content,…
The mechanisms by which amorphous intermediates transform into crystalline materials are not well understood. To test the viability and the limits of the classical crystallization, new model systems for crystallization are needed. With a view to elucidating the formation of an amorphous precursor and its subsequent cr…
Designing and controlling particle self-assembly into robust and reliable high-performance smart materials often involves crystalline ordering in curved spaces. Examples include carbon allotropes like graphene, synthetic materials such as colloidosomes, or biological systems like lipid membranes, solid domains on vesi…
We measured the low-temperature thermal conductivity of a layered superconductor with quasi-one-dimensional characteristics, the ternary telluride ${\mathrm{Ta}}_{4}{\mathrm{Pd}}_{3}{\mathrm{Te}}_{16}$ with a transition temperature ${T}_{c}\ensuremath{\approx}4.3$ K. The significant residual linear term of thermal con…
We have established finite-sized model molecules of hexagonal graphene nanoflakes which consisted of up to about 400 carbon atoms and certain defects and calculated their geometric structures, molecular orbitals, and valence electron excitation properties by DFT and TD-DFT approaches. Several types of defects such as…
Thin film growth of iron chalcogenides by pulsed laser deposition (PLD) is still a delicate issue in terms of simultaneous control of stoichiometry, texture, substrate/film interface properties, and superconducting properties. The high volatility of the constituents sharply limits optimal deposition temperatures to a…
Among the various drug delivery devices, nanoliposome is an emerging formulation in the treatment of cancer. Here we have developed tamoxifen citrate (TC) loaded nanoliposome conjugated with phosphoethanolamine (PE) by thin film hydration method. Various physicochemical and biopharmaceutical characterization studies s…
An anionic degradable hydrogel based on a heparin mimetic polymer was prepared using PEG-PCL-DIC as a crosslinker.
Transfer of epitaxial, two-dimensional (2D) MoS2 on sapphire grown via synthetic approaches is a prerequisite for practical device applications. We report centimeter-scale, single crystal, synthesized MoS2 field effect transistors (FETs) transferred onto SiO2/Si substrates, with a field-effect mobility of 4.5 cm2 V−1…
The upper critical field ${H}_{c2}$ in superconducting ${\mathrm{BaFe}}_{2\ensuremath{-}x}{\mathrm{Ni}}_{x}{\mathrm{As}}_{2}$ single crystals has been determined by magnetotransport measurements down to 0.6 K over the whole superconducting dome with $0.065\ensuremath{\le}x\ensuremath{\le}0.22$ for both the interplane…
We have investigated the lattice distortion coupled to the Co $3d$-spin-state ordering in thin films of perovskite ${\mathrm{LaCoO}}_{3}$ with various epitaxial strains by measurements of the magnetization, x-ray diffraction, and optical spectra. In the system with tensile strain about 0.5%, a lattice distortion chara…