Polyoxometalates as anionic molecular metal oxides clusters with open frameworks and rich redox chemistry have outstanding versatility in energy conversion storage research.

By effectively converting waste heat into electricity, thermoelectric materials and devices can provide an alternative approach to tackle the energy crisis. Amongst materials, bismuth telluride (Bi2Te3) its derivatives exhibit high figure of merit ZT values in near-room-temperature region show great potential for application devices. Considering rapid development Bi2Te3-based their last few years, a short systematic review is much needed. Here, we summarize novel designs, properties,...

The formation of ordered arrays molecules via self‐assembly is a rapid, scalable route towards the realization nanoscale architectures with tailored properties. In recent years, graphene has emerged as an appealing substrate for molecular in two dimensions. Here, first five years progress supramolecular organization on are reviewed. process can vary depending type employed: epitaxial graphene, grown situ metal surface, and non‐epitaxial transferred onto arbitrary substrate, have different...

Scanning tunneling microscopy (STM) of monolayers comprising oligothiophene and fullerene molecular semiconductors reveals details their molecular-scale phase separation ordering with potential implications for the design organic electronic devices, in particular future bulk heterojunction solar cells. Prochiral terthienobenzenetricarboxylic acid (TTBTA) self-assembles at solution/graphite interface into either a porous chicken wire network linked by dimeric hydrogen bonding associations...

Weak interactions between bromine, sulphur, and hydrogen are shown to stabilize 2D supramolecular monolayers at the liquid–solid interface. Three different thiophene-based semiconducting organic molecules assemble into close-packed ultrathin ordered layers. A combination of scanning tunneling microscopy (STM) density functional theory (DFT) elucidates within monolayer. Electrostatic identified as driving force for intermolecular Br⋯Br Br⋯H bonding. We find that S⋯S layers correlate with hole...

Abstract Perovskite solar cells (PSCs) exhibit the steepest growth in power conversion efficiency among existing photovoltaic technologies. However, a wide range of factors restrict commercial viability PSCs as renewable energy source. This article reviews latest progress PSC devices including innovative light‐harvesting perovskite materials and advanced interfacial layers, foremost challenges. The most promising remedial solutions to challenges are also discussed. For realization high...

We describe a surprising cooperative adsorption process observed by scanning tunneling microscopy (STM) at the liquid−solid interface. The involves association of threefold hydrogen-bonding unit, trimesic acid (TMA), with straight-chain aliphatic alcohols varying length (from C7 to C30), which coadsorb on highly oriented pyrolytic graphite (HOPG) form linear patterns. In certain cases, known TMA "flower pattern" can coexist temporarily TMA−alcohol patterns, but it eventually disappears....

The results of a high-resolution ambient STM study 'sulflower' (octathio[8]circulene) and 'selenosulflower' (sym-tetraselena-tetrathio[8]circulene) molecules, immobilized in hydrogen-bonded matrix trimesic acid (TMA) at the solid-liquid interface, are compared with X-ray structure separate host guest 2D 3D crystals, respectively.

The behavior of small molecules on a surface depends critically both molecule-substrate and intermolecular interactions. We present here detailed comparative investigation 1,3,5-benzene tricarboxylic acid (trimesic acid, TMA) two different surfaces: highly oriented pyrolytic graphite (HOPG) single-layer graphene (SLG) grown polycrystalline Cu foil. On the basis high-resolution scanning tunnelling microscopy (STM) images, we show that epitaxy matrix for hexagonal TMA chicken wire phase is...

Abstract Thermal annealing of the emissive layer an organic light emitting diode (OLED) is a common practice for solution processable layers and reported temperatures varies across wide range temperatures. We have investigated influence thermal at different on performance OLEDs. Solution processed polymer Super Yellow were annealed their performances compared against OLEDs with non-annealed layer. found significant difference in efficiency The external quantum (EQE) reached maximum 4.09% 50...

Soft actuators that respond to external stimuli like moisture, magnetism, light, and temperature have received tremendous attention owing their promising potential in many frontier applications, including smart switches, soft robots, sensors, artificial muscles. However, most of the conventional can only be triggered by a solo stimulus demand advanced manufacturing techniques utilize expensive, hazardous, synthetic raw materials. Herein, we design fabricate multiple stimuli-responsive...

Abstract Aqueous batteries using non‐metallic charge carriers like proton (H + ) and ammonium (NH 4 ions are becoming more popular compared to traditional metal‐ion batteries, owing their enhanced safety, high performance, sustainability (they ecofriendly derived from abundant resources). Ammonium ion energy storage systems (AIBs), which use NH with tetrahedral geometry, a small hydrated ionic radius, relatively low weight, emerging as strong candidates in non‐metal battery chemistry....

Trimesic acid (TMA) and alcohols were recently shown to self-assemble into a stable, two-component linear pattern at the solution/highly oriented pyrolytic graphite (HOPG) interface. Away from equilibrium, TMA/alcohol self-assembled molecular network (SAMN) can coexist with pure-TMA networks. Here, we report on some novel characteristics of these non-equilibrium TMA structures, investigated by scanning tunneling microscopy (STM). We observe that both chicken-wire flower-structure phases host...

Recently, halogen···halogen interactions have been demonstrated to stabilize two-dimensional supramolecular assemblies at the liquid–solid interface. Here we study effect of changing halogen, and report on 2D structures obtained by adsorption 2,4,6-tris(4-bromophenyl)-1,3,5-triazine (TBPT) 2,4,6-tris(4-iodophenyl)-1,3,5-triazine (TIPT) both highly oriented pyrolytic graphite (111) facet a gold single crystal. These molecular systems were investigated combining room-temperature scanning...

We report a new method for the growth of reduced graphene oxide (rGO) on 316L alloy stainless steel (SS) and its relevance biomedical applications. demonstrate that electrochemical etching increases concentration metallic species surface enables rGO. This result is supported through combination Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron (SEM), density functional theory (DFT) calculations static water contact angle...

The imaging and characterization of single-molecule reaction events is essential to both extending our basic understanding chemistry applying this challenges at the frontiers technology, for example, in nanoelectronics. Specifically, behavior individual molecules can elucidate processes critical controlled synthesis materials applications multiple nanoscale technologies. Here, we report an important semiconducting organic molecule through unprecedented observed with submolecular resolution...

We show that the surface-supported two-dimensional covalent organic framework (COF) known as COF-1 can act a host architecture for C60 fullerene molecules, predictably trapping molecules under range of conditions. The fullerenes occupy lattice at solution/solid interface, and in dried films COF-1/fullerene network be synthesized through either drop-deposition solution or by dipstick-type synthesis which is briefly dipped into solution.

A novel approach to improve the specific capacitance of reduced graphene oxide (rGO) films is reported. We combine aqueous dispersion liquid-crystalline GO incorporating salt and urea with a blade-coating technique make hybrid films. After drying, stacked sheets mediated by solidified NaCl are hydrothermally reduced, resulting in nanoporous film consisting rumpled N-doped rGO sheets. As supercapacitor electrode, exhibits high gravimetric 425 F g-1 record volumetric 693 cm-3 at 1 M H2SO4...

Ullmann coupling is one of the most frequently employed methodologies for producing π-conjugated surface-confined polymers. One unfortunate side product reaction creation metal halide islands formed from liberated halogen atoms. Following reaction, these can account a large proportion substrate surface area and thus inhibit domain growth effectively poison catalyst. Here, we describe an efficient reliable methodology removing byproduct at room temperature by exposure to beam atomic hydrogen;...