Chemically reduced graphene oxide (RGO) has recently attracted growing interest in the area of chemical sensors because its high electrical conductivity and chemically active defect sites. This paper reports synthesis GO using NaBH4 performance for ammonia detection at room temperature. The sensing layer was synthesized on a ceramic substrate containing platinum electrodes. effect reduction time (GO) explored to optimize response, recovery, response time. RGO film characterized electrically...

Highly luminescent MoS2 nanocrystals (NCs) with controlled size distribution have been achieved using a simple yet inexpensive and impurity free sono-chemical exfoliation method followed by gradient centrifugation. The of could be varied within the diameter range ∼4 to 70 nm. Typical nanocrystal has exhibited high crystalline quality 0.25 nm lattice fringe spacing for (002) planes 2-H phase MoS2. Raman spectra revealed that both out-of-plane in-plane vibrational modes are stiffen due edge...

Template-free, bottom-up synthesized, micron sized few layer 2H-MoS₂for photodetector and photocatalytic applications.

Sonication induced vertical fragmentation of two-dimensional (2D) WS2 nanosheets into highly luminescent, monodispered, zero-dimensional (0D) quantum dots (QDs) is reported. The formation 0D structures from 2D sheets and their surface/microstructure characterization are revealed microscopic spectroscopic investigations. Size dependent optical properties nanostructures have been explored by UV–vis absorption photoluminescence spectroscopy. Interestingly, it observed that, below a critical...

We report for the first time, fabrication of novel two-dimensional (2D) p-WS2/n-Si vertical heterostructures with superior junction and photoresponse characteristics. Few layer WS2 has been synthesized by a lithium-ion intercalation technique in hexane coated on Si substrates realization CMOS compatible devices. Atomic force microscopy Raman spectroscopy have used to confirm 2D nature layers. Sharp band-edge absorption emission peaks indicated formation mono-to-few-layers thick direct band...

The modification of individual oxygen functional groups and the resultant optical properties a graphene oxide suspension were investigated using controlled photothermal reduction by infrared irradiation. evolution structural characteristics GO suspensions was obtained from Raman spectra, x-ray photoelectron spectroscopy, absorption, steady state time-resolved photoluminescence spectroscopy. results suggest gradual restoration sp2 clusters within sp3 matrix with an increase time power...

This study identifies and characterizes a gold nano-particle tagged antimicrobial peptide that can internalize cells kill intracellular bacteria without being cytotoxic. It also considerably reduce<italic>S.</italic>Typhi infection in animal model.

Lithium halide assisted high yield synthesis of few layers 2H phase semiconducting WS2 in organic solvents is reported. A group lithium halides (LiCl, LiBr and LiI) has been employed for the first time to intercalate by using Li, followed mild sonication exfoliate dispersive polar solvents. In contrast n-butyllithium (n-BuLi) exfoliation method, which yields only metallic 1T on prolonged reaction (3-7 days) at higher temperatures, proposed method produces a much shorter (5 minute...

Defect induced enhanced charge storage performance of WS₂ quantum dots in a flexible solid state supercapacitor.

Molecular self-assembly, a phenomenon widely observed in nature, has been exploited through organic molecules, proteins, DNA, and peptides to study complex biological systems. These self-assembly systems may also be used understanding the molecular structural biology which can inspire design synthesis of increasingly biomaterials. Specifically, use these building blocks investigate protein folding misfolding particular value since it provide tremendous insights into peptide aggregation...

We report a novel graphene oxide (GO) based p-n heterojunction on n-Si. The fabricated vertical GO/n-Si diode shows very low leakage current density of 0.25 µA/cm(2) and excellent rectification characteristics upto 1 MHz. device illumination broadband (300-1100 nm) spectral response with characteristic peak at ~700 nm, in agreement the photoluminescence emission from GO. Very high photo-to-dark ratio (>10(5)) is observed upon UV light. transient photocurrent measurements indicate that GO...

A high yield synthesis technique of few-layer MoS2 by ethylenediamine (EDA)-assisted liquid phase exfoliation is reported. In the cyclic two-step process, EDA adsorbed initially followed sonication with propylene carbonate. The combination organic solvents results in micrometer sized two-dimensional (2D) nanosheets within a short duration. Controlled gradual centrifugations separate 2D different sizes ranging from nanocrystals to flakes. method differs other sonication-induced fragmentation...

We demonstrate a facile method for the Suzuki coupling of aryl molecules on diamond surface. This is more versatile alternative compared to previous methods based alkene linkers because it opens up possibilities application in molecular electronics and photovoltaics. The surface premodified with aryldiazonium salt order functionalize halide or boronic acid, these are then used as synthons subsequent molecules. highly specific can be uninterrupted conjugation large class organic As proof...

Abstract Two novel organic dyes have been synthesized using electron rich phenothiazine as donors and oligothiophene vinylene conjugation spacers. The two (2E)‐2‐cyano‐3‐(5‐(5‐((E)‐2‐(10‐(2‐ethylhexyl)‐10H‐phenothiazin‐7‐yl)vinyl)thiophen‐2‐yl)thiophen‐2‐yl)acrylic acid (PTZ‐1) (2E)‐3‐(5‐(5‐(4,5‐bis((E)‐2‐(10‐(2‐ethylhexyl)‐10H‐phenothiazin‐3‐yl)vinyl)thiophen‐2‐yl)thiophen‐2‐yl)thiophen‐2‐yl)‐2‐cyanoacrylic (PTZ‐2) were fully characterized employed in dye‐sensitized solar cells (DSCs) to...

Solid state ionic conductors based on a carbazole-imidazolium cation structure were synthesized for application in solid dye sensitized solar cells. electrolytes using designed and iodine provide dual channels hole/triiodide transportation, giving rise to good conversion efficiency of 2.85%.

Abstract A polymer based on fluorene, thiophene, and benzothiadazole as the donor–spacer–acceptor triad is covalently coupled to reduced graphene oxide (rGO) sheets via diazonium coupling with phenyl bromide, followed by Suzuki coupling. These polymer–graphene hybrids show good solubility in organic solvents, such chloroform, tetrahydrofuran (THF), toluene, dichlorobenzene, N , ‐dimethylformamide (DMF), exhibit an excellent optical‐limiting effect a 532‐nm laser beam. The threshold energy...

We report on the tuning of luminescence response few layered graphitic carbon nitride (g-C3N4) nanosheets by reducing functional groups though chemical reduction. The g-C3N4 have been obtained from its bulk counterpart through liquid phase exfoliation, while attached removed sodium borohydride treatment. X-ray photoelectron and micro Raman studies indicate improved aromatization removal groups, structural defect formation has realized at higher reduction levels. It found that increase in sp2...

Fabrication of flexible solid-state supercapacitor is a field paramount importance because its potential application in portable devices. In this article, graphene oxide and titanium dioxide hybrid (GO-TiO2) nanocomposites different compositions are employed for the fabrication supercapacitors. An easy, fast, scalable controlled sol-gel method devised GO-TiO2 growth from amounts isopropoxide at atmospheric pressure. Highly monodispersed rutile TiO2 nanospindle homogenously grafted on GO by...

Boron doped diamond (BDD) thin film was found to exhibit higher photocurrent conversion efficiencies and photostability compared commonly used transparent conducting oxides (ITO FTO) owing the matching energy levels strong C-C bonding at organic/diamond interface.