Raman Spectroscopy-Assisted Characterization of Nanoform MoS Thin Film Transistor.

In this paper, we report the simple preparation and investigation of electrical transport properties of nanoform MoS thin film transistor (TFT) devices. MoS nanoparticles were synthesized by using the hydrothermal method. The physiochemical characterizations such as UV-vis, Fourier transform infrared, X-ray diffraction, and Raman spectroscopy studies were performed.

Ferroelectric-semiconductor BaTiO-AgO nanohybrid as an efficient piezo-photocatalytic material.

Piezo-photocatalysis is a new concept of utilizing nanohybrids comprising piezoelectric and photocatalytic materials for enhancement in advanced oxidation process under the presence of light and mechanical energy. In this study, we explored the effectiveness of piezo-photocatalysis via examining their catalytic activity towards the degradation of azo dye (Rhodamine-B) and standard pollutant (Phenol) catalyzed by ferroelectric-semiconductor (BaTiO-AgO) nanohybrids. Further, the enhancement in piezo-photocatalysis has been achieved via persulfate activation and the role of free radicals was examined by quenchers.

Effect of peroxomonosulfate, peroxodisulfate and hydrogen peroxide on graphene oxide photocatalytic performances in methyl orange dye degradation.

Carbocatalyst GO photocatalytic mechanism and performances in the presence of an electron scavenger (ES) has been consciously discussed herein. Single layer GO photocatalyst has been synthesized by Hummer's method and photocatalyst characteristics are gathered by different analytical methods. Studies ensured the formation of a good crystalline GO that contains number of oxygenated functional groups, with average crystalline size of the sp domain in 18.

Enhanced Photocatalytic Degradation Activity of 2-D Graphitic Carbon Nitride-SnO₂ Nanohybrids.

In this paper, we report on the facile synthesis of graphitic carbon nitride (g-C₃N₄)-tin oxide (SnO₂) nanohybrid as an efficient photocatalyst prepared via sol-gel method. SnO₂ nanoparticles are pointcontacted with g-C₃N₄. The results of physio-chemical characterizations such as SEM-EDAX, XRD, BET, FT-IR and UV-DRS spectra reveal the successful formation and integration of nanohybrid.

Enhanced Photocatalytic Properties of Nanostructured WO₃ Semiconductor-Photocatalyst Prepared via Hydrothermal Method.

Ground and distilled water-mediated tungsten trioxide (WO3) nanostructures are prepared via hydrothermal approach. The physical and surface chemical properties of catalyst are analyzed using XRD, SEM-EDAX, HR-TEM, FT-IR, UV-DRS, Zeta potential and photoluminescence spectroscopy. It is confirmed that ground water has high impacts on the materials properties such as crystallinity and morphology.

Influence of Morphology and Common Oxidants on the Photocatalytic Property of β-SnWO4 Nanoparticles.

In this paper, we report a simple, cost effective and surfactant-free method for synthesizing different morphology of β-SnWO4 with irregular, spherical, flake-like and leaf-like structures by using sonochemical method followed by calcination. A well dispersed and highly crystalline β-SnWO4 crystallites with various sizes have been prepared. The samples were characterized by using X-ray diffraction (XRD), scanning electron microscope (SEM), UV-vis spectroscopy, particle size and Zeta potential analyser.

Facile Synthesis of Vanadium-Pentoxide Nanoparticles and Study on Their Electrochemical, Photocatalytic Properties.

Vanadium pentoxide (V2O5) nanoparticles were synthesized via an anionic, cationic and non-ionic surfactant-assisted hydrothermal method. The synthesized nanoparticles were characterized by using powder X-ray diffractometer, Scanning Electron Microscope, High Resolution Transmission Electron Microscope and UV-Vis spectroscopy. The experimental results confirm the formation of vanadium pentoxide nanoparticles.

Graphene-oxide (GO)-Fe3+ hybrid nanosheets with effective sonocatalytic degradation of Reactive Red 120 and study of their kinetics mechanism.

This work demonstrates the preparation of graphene-oxide (GO)-Fe(3+) hybrids nanosheets and their high bleaching efficiency on the dye "Reactive Red 120 (RR 120)" by using sonocatalytic degradation. Sonocatalytic degradation was enhanced by using oxidants like PMS (peroxomonosulphate), PDS (peroxodisulphate), H2O2 (hydrogen peroxide) and KIO4 (potassium periodate). Our observations manifested that the degradation of the dye "RR 120" was found to be multiplied by addition of oxidants in the order of PMS>H2O2>PDS>KIO4.

Phenylhydrazones of piperidin-4-ones as AND, OR, NOR, NAND, and INH molecular logic gates.

Phenylhydrazone derivatives of 2,6-diarylpiperidin-4-ones viz., 3-methyl-2,6-diphenylpiperidin-4-one (PMP-PH) and 3-methyl-2,6-di-(9H-fluorenyl)piperidin-4-one (FMP-PH) when illuminated and protonated perform the functions of AND, OR, NOR, NAND Boolean logic gates with all optical outputs. The functions of the AND and the NAND gates rely on changes in absorption and emission of the phenylhydrazone upon isomerization of the photochromic unit.

Investigation of transfer characteristics of high performance graphene flakes.

In this article, we attempted a study on field effect transport characteristics of graphene flakes. These graphene flakes were exfoliated by mechanical peeling-off technique and the electrical contacts were patterned by photo-lithographic method. Graphene devices have shown better transfer characteristics which was obtained even in low-voltage (< 5 V).

Observation of nonvolatile resistive memory switching characteristics in Ag/graphene-oxide/Ag devices.

In this paper, we report highly stable and bipolar resistive switching effects of Ag/Graphene oxide thinfilm/Ag devices. The graphene-oxide (GO) thinfilms were prepared on Ag/SiO2/Si substrates by spin-coating technique. The Ag/GO/Ag devices showed a steady and bipolar resistive switching characteristic.

Nanoscale fabrication of a three-dimensional stack of graphene layers using a focused ion beam.

A top-down nanoscale stack fabrication approach involving the high-precision carving of a stack of graphene layers from a thin graphite flake via focused-ion-beam (FIB) three-dimensional (3D) etching is presented. Using this technology, etching was performed in the c-axis with the height of a few tens of nanometres. By reducing the stack height to 50 nm, a 3D stack of graphene layers coupled in a stacked manner was fabricated.

Fabrication and characteristics of submicron stacked-junctions on thin graphite flakes.

We report on the fabrication and transport characteristics of submicron-size stacks along c-axis of thin graphite flakes. The stacks were fabricated using a three-dimensional focused-ion-beam (FIB) etching technique. The stack with in-plane area A of 0.

Temperature dependence of transport anisotropy of planar-type graphite nanostructures fabricated by focused ion beam.

We report in this paper on the observation of temperature-dependent anisotropic transport behavior for planar-type nanostructures (in-plane and out-of-plane) fabricated on a thin graphite layer using a three-dimensional focused-ion-beam (FIB) etching technique. The transport characteristics were studied for several in-plane areas with sizes of 6 x 6 microm2, 6 x 4 microm2 and 6 x 2 microm2 planar-type structures/patterns and out-of-plane structures with the dimensions of 2 x 1 x 0.3 microm3.