Recent studies have demonstrated the feasibility of synthesizing two-dimensional (2D) Janus materials which possess intrinsic structure asymmetry. Hence, we performed a systematic first-principles study of 2D Janus transition metal dichalcogenide...

Polyaniline emeraldine salt (PAni-ES) was successfully deposited on paper through layer-by-layer technique. In this method, a paper was alternately dipped in aniline monomer and an oxidizing agent for different dipping cycles. This process produced green PAni-ES on paper. The morphology of the samples showed polymeric networks with pores, fiber-like structures and aggregates. There is a transition from frequency-independent to frequency-dependent conductivities of the samples. The conductivity increased with increasing number of dipping cycles. The frequency-dependent conductivities follow the power-law behavior reflecting conducting network and hopping mechanisms. Lastly, the conductivities with frequency followed a scaling behavior reflecting a common physical mechanism in PAni-ES on paper.

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We report a top-down method for high-yield production of Janus monolayer MoSSe. In particular, we replace the top S atom with Se by controlled plasma-assisted selenization of monolayer MoS2. Based on the Raman Spectroscopy results, all of the characterized monolayer MoS2 triangles are completely transformed to Janus MoSSe. The Janus structure of MoSSe is confirmed directly by means of high-resolution transmission electron microscopy (TEM) and energy-dependent X-ray photoelectron spectroscopy (XPS). Density Functional Theory (DFT) calculations are performed to determine the effect of the Se-concentration on the electronic properties of Janus MoSSe. Our method provides an avenue towards high-yield production and full exploration of Janus Transition Metal Dichalcogenides (TMDs).

Hydrophobic surfaces are eyed for their self-cleaning ability because water droplets can roll on them (instead of clinging), thus the surface have capability to remove dirt. Hydrophobic surfaces were created by coating functionalized Titanium Dioxide-based paint. The paint was fabricated by reacting fluorosilane molecules in ethanol with titanium dioxide nanoparticles. Ethanol also serves as the volatile suspension medium that evaporates when the paint is coated on surfaces. The paint was coated on different surfaces by simple dipping. Contact angle of coated aluminum sheet, soda-lime glass, filter paper and silicon carbide polishing paper showed hydrophobicity. Water droplets are made to roll on coated soda-lime glass at angle of 0.057°. The ability of water droplets to roll highlights the coated surface self-cleaning potential.