Materials Literature
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A polymeric gel is a cross-linked polymer network swollen with a solvent. Much of the literature concerning the constitutive response of these materials is limited to elasticity coupled with fluid permeation. We have developed a continuum-level theory to describe the coupled fluid permeation and large viscoelastic def…
A primary factor influencing catalyticversus stoichiometric behaviour of molecular main group species in homogeneous dehydrocoupling reactions is the redox stability of the metal centre. Thus, only in the case of redox-stable metals has catalytic behaviour so far been observed, through genuinely hydrogenic coupling (E…
Dye-sensitized solar cells (DSCs) show potential as a low cost alternative to silicon solar cells. Power conversion efficiencies exceeding 12% have been achieved for DSCs. Typical DSCs are based on TiO(2) nanoparticle photoanodes, which have numerous grain boundaries, surface defects and trap states as electrons trans…
The electronic band structure of halogenated germanene in the presence of spin–orbit coupling is investigated using first-principles calculations. Our results demonstrate that, compared with pure germanene, the π and π* bands of germanene adsorbed with Cl, Br and I remain crossed at the Fermi level – despite the cross…
A series of “H” type dye sensitizers with pyrrole as the conjugated bridge were synthesized, in which two pieces of N-arylpyrrole-based organic dye moieties were linked together through various aromatic rings. Interestingly, the introduced aromatic isolation group not only gave a new possibility to modify the construc…
This work presents a one-pot template-free synthesis, detailed characterization, growth mechanism and application of well-defined uniform monodisperse (BiO)2CO3 hierarchical hollow microspheres self-assembled with single-crystalline nanosheets. The synthesis was conducted by hydrothermal treatment of bismuth citrate a…
[PtL(6)X] {X = Cl or NCS and L(6) = 5-mesityl-1,3-di(2-pyridyl)-benzene} display similar luminescence in solution but, in the solid state, the packing of the molecules is different, with short PtPt interactions for X = NCS, leading to a red-shifted emission band. The effect has been used to generate OLEDs that emit sq…
The first luminescent metal-organic framework (MOF) with [Zn(6)(μ(6)-O)] cluster has been synthesized and realized for reversible sensing of small molecules.
A robust fluorescent turn-on sensor with a detection limit of 10 nM was developed for detecting sulfite anions in water and real beverage samples. For this sensitive sensor, the reaction of sulfite with the quenching moiety of the probe led to the enhanced fluorescent emission.
A facile route that combines co-assembly and photothermal reduction was developed to synthesize free-standing, flexible FeF(3)-graphene papers. The papers contain well-dispersed FeF(3) nanoparticles and open diffusion channels in a porous, electrically conducting network of graphene sheets, and demonstrate promising a…
Graphene-like carbon-Ni-α-MnO(2) and -Cu-α-MnO(2) blends can serve as effective catalysts for the oxygen reduction reaction with activities comparable to Pt/C.
Nitrogen-doped graphene (NGR) was incorporated as a catalyst and used as a counter electrode in dye-sensitized solar cells (DSSCs). The NGR electrodes showed a number of advantages over other electrodes that consisted solely of graphene or Pt films, including high charge transfer rates, low resistance to diffusion, an…
Most of reported fluorescent probes for mercapto amino acids are organic dyes. They often exhibit poor water-solubility and require the use of biologically toxic organic solvents in sensing and bioimaging. In the present study, a biocompatible phosphorescent nanoprobe by using mesoporous silica nanoparticles as carrie…
portland cement (OPC) is conventionally used as primary binder to produce concrete. The amount of carbon dioxide released during the manufacture of OPC and the extent of energy required to produce OPC are the matters of environmental concern in view of global warming and the poor availability of power. Fly-ash, abunda…
Smart materials that can sense and respond to changes in the environment are of interest in numerous and diverse applications. In this paper, we report gradient surfaces where wettability and surface potential respond to changes in the pH. The gradients are produced by controlling the concentration of amine and carbox…
A facile, mild, environmentally friendly and reproducible strategy was used to fabricate the multifunctional fluorescent-magnetic polyethyleneimine functionalized Fe(3)O(4)-mesoporous silica yolk-shell nanocapsules for simultaneous fluorescent tracking and magnetically guided small interfering RNA delivery.
3,4,5-Trinitropyrazole-1-ol and its nitrogen-rich salts were synthesized and well characterized by 1H, 13C NMR (some with 15N NMR), and IR spectroscopy, and by elemental analysis. Additionally, the structures of the ammonium and triazolium 3,4,5-trinitropyrazole-olates were confirmed by single-crystal X-ray diffractio…
Homeostatic synaptic plasticity is a negative-feedback response employed to compensate for functional disturbances in the nervous system. Typically, synaptic activity is strengthened when neuronal firing is chronically suppressed or weakened when neuronal activity is chronically elevated. At both the whole cell and en…
Increasing interest has been devoted to preparing gold nanoparticle (GNP) functionalized TiO2 nanotube array (TNTA) nanocomposites (GNP/TNTA) for photocatalytic applications. Nonetheless, achieving accurate control of surface assemblies of GNPs tethered on the TNTA substrate is far from satisfactory. Thus, in our work…
A wide variety of polymeric carbohydrate-rich weed species were directly converted to a platform chemical, 5-hydroxymethylfurfural (HMF), and a promising next-generation biofuel, 5-ethoxymethyl-2-furfural (EMF), with homogeneous and heterogeneous catalysts under mild reaction conditions. Brønsted acidic IL catalysts,…