The Au(CN)(2)(-) ion is the most stable Au compound known for centuries, yet a detailed understanding of its chemical bonding still lacking. Here we report direct experimental evidence significant covalent character in Au-C bonds using photoelectron spectroscopy and comparisons with lighter congeners, Ag(CN)(2)(-) Cu(CN)(2)(-). Vibrational progressions stretching mode were observed all detachment transitions Au(CN)(2)(-), contrast to atomic-like Cu(CN)(2)(-), revealing character. In...

A p-type semiconductor photoelectrode in dye sensitized solar cells (DSCs) has a large optical band gap and high ionization potential but suffers from its intrinsically low hole transfer rate, thus resulting much poorer performance than n-DSCs. Nickel oxide (NiO)/graphene composite is synthesized to offer larger surface area higher conductivity the pristine NiO film. The novel as p-DSCs demonstrates increment of both short-circuit photocurrent open-circuit photovoltage, leading 2 times...

To improve the interlaminar shear strength (ILSS) of carbon fiber reinforced epoxy composite, networks multiwalled nanotubes (MWNTs) were grown on micron-sized fibers and single-walled (SWNTs) dispersed into matrix so that these two types entangle at (CF)/epoxy interface. The MWNTs CF (CF-MWNTs) by chemical vapor deposition (CVD), while finely in precursor with aid a dispersing agent polyimide-graft-bisphenol A diglyceryl acrylate (PI-BDA) copolymer. Using vacuum assisted resin transfer...

Abstract Wearable flexible electronics that are derived from hydrogels inevitably undergo dehydration, and the sensing performance is highly affected because stretchability conductivity weaken. Monitoring water retention rate of as they operate without dismantling assembled device vital for evaluating performances intervening in a timely manner to address problem. However, relevant research still lacking. Herein, an autofluorescent hydrogel engineered based on clusterization‐triggered...

The 3rd-Gen OLED materials employing thermally-activated delayed fluorescence (TADF) combine advantages of first two for high-efficiency and low-cost devices. Though urgently needed, blue TADF emitters have not met stability requirement applications. It is essential to elucidate the degradation mechanism identify tailored descriptor material device lifetime. Here, via in-material chemistry, we demonstrate chemical involves critical role bond cleavage at triplet state rather than singlet,...

Acquiring high-performance calcium phosphate (CaP) ceramics via 3D printing is critical for their applications in bone regenerative repair. In current study, a complete process study of printed CaP based on digital light processing (DLP) technology was performed to get the ideal implant repair calvarial defects. The smaller particle size initial powder would be more favorable getting slurry with high solid content and low viscosity. green body precision curing rate could fabricated at...

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Liquid crystal elastomers (LCEs), as a classical two-way shape-memory material, are good candidates for developing artificial muscles that mimic the contraction, expansion, or rotational behavior of natural muscles. However, biomimicry is currently focused more on actuation functions dominated by muscle fibers, whereas tactile sensing neuronal receptors and synapses have not been well captured. Very few studies reported concept LCEs, but signals were still donated macroscopic actuation, is,...

Bicontinuous macroporous graphene foam composed of few-layered sheets provides a highly conductive platform on which to deposit mesoporous polyaniline via incorporation electrodeposition and inkjet techniques. The experimental results exhibit that the coating thin layer surface three-dimensional is importance for changing hydrophobic hydrophilic one subsequent filling network into foam. porous with high pseudocapacitance efficient adjusting pore structure capacitive properties When used as...

A salt-triggered transparency-switchable polyampholyte hydrogel is engineered as a multifunctional smart window featuring active and facile light modulation ability, on-demand information-provision management capacity, self-healing capacity.

The reprogrammable shape-memory effect of the anistropic aerogel-based sensing electronics enables adaptive wearability, potentially ensuring accurate long-term physical monitoring without suppressing inherent excellent pressure-sensing performance.

We report an investigation of the electronic structure and chemical bonding AuH2− using photoelectron spectroscopy ab initio calculations. obtained vibrationally resolved spectra at several photon energies. Six states AuH2 were observed assigned according to theoretical The ground state is known be linear, while that neutral bent with a ∠H–Au–H equilibrium bond angle 129°. This large geometry change results in very broad bending vibrational progression for ground-state transition. electron...

The finding of the periodic law is a milestone in chemical science. periodicity light elements Periodic Table fully accounted for by quantum mechanics. Here we report that relativistic effects change bond multiplicity group 6 diatomic molecules M2 (M = Cr, Mo, W, Sg) from hextuple bonds Cr2, Mo2, W2 to quadruple Sg2, thus breaking nonrelativistic domain. same trend also found other superheavy-element diatomics Rf2, Db2, Bh2, and Hs2.

Abstract Bone regeneration for large, critical-sized bone defects remains a clinical challenge nowadays. Guided (GBR) is promising technique the repair of multiple defects, which widely used in oral and maxillofacial but still unsatisfied treatment long defects. Here, we successfully fabricated bilayer mineralized collagen/collagen (MC/Col)-GBR membrane with excellent osteoinductive barrier function by coating MC particles prepared via situ biomimetic mineralization process on one side...

We report a combined experimental and theoretical investigation of MI2− (M = Cs, Cu, Ag, Au) to explore the chemical bonding in group IA IB diiodide complexes. Both photoelectron imaging low-temperature spectroscopy are applied Au), yielding vibrationally resolved spectra for CuI2− AuI2− accurate electron affinities, 4.52 ± 0.02, 4.256 0.010, 4.226 0.010 eV CsI2, CuI2, AuI2, respectively. Spin−orbit coupling is found be important all complexes ab initio calculations including spin−orbit...

We report vibrationally resolved photoelectron spectroscopy (PES) of Au(2)(CO)(n)(-) (n = 1-3), in combination with relativistic density functional theory (DFT) and ab initio calculations. The ground-state transition the spectrum Au(2)CO(-) is broad, containing vibrational structures both bending CO stretching modes suggesting a large structural change from to Au(2)CO. transitions for n 2 3 display well-resolved progression mode frequencies 2110 +/- 40 2160 cm(-1), respectively. PES data...

Thiolate-protected gold nanoparticles have been found recently to be coordinated by the so-called "staple" bonding motifs, consisting of quasi-linear [RS–Au–SR] and V-shaped [RS–Au–(SR)–Au–SR] units, which carry a negative charge formally. Using photoelectron spectroscopy (PES) in conjunction with ab initio calculations, we investigated electronic structure chemical simplest staples R = CH3: Au(SCH3)2− Au2(SCH3)3−, were produced electrospray ionization. PES data two Au–thiolate complexes are...

We report a combined experimental and theoretical investigation of [XAuCN]− (X = F, Cl, Br, I) to examine the chemical bonding in mixed cyanide halide Au(I) complexes. Photoelectron spectra are obtained for [XAuCN]−, yielding electron affinities 5.38 ± 0.05, 5.14 4.75 0.05 eV XAuCN I), respectively. Relativistic quantum calculations based on wavefunction theory density functional carried out help interpret photoelectron elucidate electronic structures Spin–orbit coupling is found be...

Abstract There is a great need for viable alternatives to today’s transparent conductive film using largely indium tin oxide. We report the fabrication of new type flexible silver nanowires (AgNW) and single-walled carbon nanotube (SWCNT) networks which are fully embedded in UV curable resin substrate. The hybrid SWCNTs-AgNWs relatively flat so that RMS roughness top surface 3 nm. Addition SWCNTs make resistance uniform; without SWCNTs, sheet composed just AgNWs varies from 20 Ω/sq 10 7...

The electronic absorption and emission spectra of free UO2Cl2 its Ar-coordinated complexes below 27 000 cm(-1) are investigated at the levels ab initio complete active space second-order perturbation theory (CASPT2) coupled-cluster singles doubles perturbative triples [CCSD(T)] using valence 3ζ-polarized basis sets. influence argon matrix in 12K experiment on is explored by investigating excited states ArnUO2Cl2. calculated two most stable with n = 2, 3 can explain observed sites...