Isoniazid (INH) a tuberculosis drug detection using turn-off fluorescent [Ce (o-Van) (HO)] probe in real samples.

Isoniazid (INH) is an essential antibiotic for the treatment of tuberculosis (TB). The accurate determination of its concentration in the human body is essential and must be monitored carefully because of the risk of severe side effects from prolonged use or overdosing. In this work, we synthesized a turn-off fluorescent sensor based on the coordination complex [Ce(o-Van)(HO)] by a simple precipitation method using cerium (III) nitrate hexahydrate and ortho-vanillin (o-Van) in a 1:3 stoichiometric ratio.

Surface elemental and structural analysis of ancient Indian punch-marked coins (600 to 200 BCE): insights into metallurgy and economic practices.

Punch-marked coins (PMCs) are the oldest coins in India and among the most widely circulated globally, often found in hoards that highlight their extensive use. This study utilizes X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to analyze the surface elemental composition and chemical properties of nine series (S-0 to S-VIII) of Janapada (S-0) and imperial PMCs (S-1 to S-VIII) dating from 600 to 200 BCE, housed in the Numismatic Society of India at BHU, Varanasi, based on the Gupta-Hardakar classification related to the PMCs. XRD results reveal four prominent diffraction peaks corresponding to metallic silver (Ag) in the face-centred cubic (fcc) phase, with a slight variation in d-spacing (∼ 0.

Utilizing Natural Materials in Electronic Devices: Inching Toward "Herbal Electronics".

Sustainable development is the primary key to address global energy challenges. Though the scientific community is engaged in developing efficient ways to not only maximize energy production from natural resources like sun, wind, water, etc. but also to make all the electronic gadgets power efficient, despite all this, the materials used in most of the electronic devices are largely produced using various materials processing techniques and semiconductors, polymers, dielectrics, etc.

A novel turn-on fluorescence sensor based on the Nd (III) complex for the ultrasensitive detection of 6-mercaptopurine.

6-mercaptopurine (6MP) is a chemotherapeuticdrug widely used for treating inflammatory bowel diseases and several cancers. Nevertheless, determining and monitoring its concentration in the human body is highly important because over or under-doses of 6MP can lead to critical health issues. In this paper, we have developed a turn-on fluorescent probe for the determination of the anticancer drug 6-mercaptopurine (6-MP) based on coordination complex [Nd (Anth) (HO)].

Feasibility of using polytetrafluoroethylene flexible implant tube for interstitial brachytherapy patients.

Purpose: To design the different Polytetrafluoroethylene (PTFE) based flexible implant tubes using an in-house developed device and to evaluate them for High dose rate (HDR) interstitial brachytherapy using computer tomography images.

Methods And Materials: PTFE hollow tube having a 2 mm (6 French) outer diameter (OD) and 1.4 mm inner diameter (ID) was used to design in-house single and/or double leader flexible catheters for interstitial brachytherapy implant.

Eldfellite-structured NaCr(SO): a potential anode for rechargeable Na-ion and Li-ion batteries.

Recent global concerns over continuously increasing air pollution and the related health risks due to automobile exhaust have shifted our attention towards green transportation. Recent decades have witnessed a revolution in portable energy-storage systems, mainly lithium-based energy-storage devices. However, the uneven distribution of global lithium reserves and its scarcity lead to huge price differences and geopolitical imbalances, and hence the research in energy-storage materials has shifted towards the development of cost-effective, abundant electrode materials.

Gd and Bi co-substituted cubic zirconia; (Zr Gd Bi O ): a novel high κ relaxor dielectric and superior oxide-ion conductor.

Solid oxide fuel cells (SOFCs) offer several advantages over lower temperature polymeric membrane fuels cells (PMFCs) due to their multiple fuel flexibility and requirement of low purity hydrogen. In order to decrease the operating temperature of SOFCs and to overcome the high operating cost and materials degradation challenges, the Cubic phase of ZrO was stabilized with simultaneous substitution of Bi and Gd and the effect of co-doping on the oxide-ion conductivity of Zr Bi Gd O was studied to develop a superior electrolyte separator for SOFCs. Up to 30% Gd and 20% Bi were simultaneously substituted in the cubic ZrO lattice (Zr Gd Bi O , + ≤ 0.

SrFeO: a novel Fe ↔ Fe redox mediated pseudocapacitive electrode in aqueous electrolyte.

Pseudocapacitors offer both high energy and high power, making them suitable for grid-scale electrochemical energy storage to harness renewable energy produced from sun, wind, and tides. To overcome performance degradation in terms of cycling fading and lower specific capacitance values at high charge/discharge rates of electrochemical pseudocapacitors based on transition-metal oxides, perovskite-structured SrFeO was envisaged as a negative electrode that harnesses the Fe and Fe redox couple to deliver superior performance. SrFeO offers high specific capacitances of 733 F g at a scan rate of 1 mV s and 743 F g at a current density of 1 A g and demonstrates excellent cyclic stability over 2500 repeated cycles with capacitance retention of >92%, achieving 94% coulombic efficiency.

NASICON-structured NaFePO(SO): a potential cathode material for rechargeable sodium-ion batteries.

The cost-effective and abundant availability of sodium offers an opportunity for rechargeable Na-ion batteries as an ideal replacement for rechargeable Li-ion batteries. However, the larger size and strong Na-Na interaction create multidimensional phase instability and transformation problems, especially in layer-structured NaMO (Mn, Co, Fe, and Ni) that inhibit the direct transformation of rechargeable Li-ion battery technology to Na-ion batteries. However, framework structures offer superior structural stability due to the interconnection of polyanions or polyhedra forming cationic octahedra.

Unfolding photophysical properties of poly(3-hexylthiophene)-MoSorganic-inorganic hybrid materials: an application to self-powered photodetectors.

Self-powered photodetectors have grown as inevitable members of the optoelectronic device family. However, it is still challenging to achieve self-powered photodetection with good responsivity in the visible spectrum region. Herein, we report solution-processable poly(3-hexylthiophene) (P3HT)-molybdenum disulfide (MoS) organic-inorganic hybrid material, which can be used as the active layer in self-powered photodetectors.

Electrochemical sensing of pioglitazone hydrochloride on N-doped r-GO modified commercial electrodes.

In this paper, we explain the electrochemical sensing of commercially available pioglitazone hydrochloride (PIOZ) tablets on a nitrogen (N) doped r-GO (Nr-GO) modified commercial glassy carbon electrode (GCE) and a commercial screen printed graphite electrode (SPGE). Nr-GO is synthesized by the chemical reduction of graphene oxide (GO) and simultaneous insertion of an N-dopant by hydrazine monohydrate. Pristine GO itself is prepared by chemical exfoliation of bulk graphite.

Facile synthesis of doped CN QDs as photoluminescent matrix for direct detection of hydroquinone.

In this work, we are reporting facile hydrothermal synthesis of a highly photoluminescent doped carbon nitride quantum dots (CNQDs) and implied it for direct detection of hydroquinone (HQ) by photoluminescence quenching phenomenon. Oxygen and sulphur moieties are regarded as dopant species in CNQDs and sourced from cheap solid precursors viz. cysteine and maleic acid.

The fabrication of an MoS QD-AuNP modified screen-printed electrode for the improved electrochemical detection of cefixime.

Herein, we report a voltammetric method for the nanomolar detection of cefixime, a third-generation antibiotic. The determination of cefixime is validated on a glassy carbon electrode (GCE) as well as on a screen-printed carbon electrode (SPCE). In the present study, we have reported a facile "one step simple hydrothermal synthesis" of MoS2 quantum dots and with the oxidation of aurochloric acid for the further formation of an MoS2 QD-AuNP composite.

Large Area Vertically Oriented Few-Layer MoS for Efficient Thermal Conduction and Optoelectronic Applications.

Large area growth of MoS can show great advances in optoelectronic devices due to its unique optical and electronic properties. Here, we directly grow vertically oriented and interconnected few-layer MoS over 1 × 1 cm of p-type Si substrate using CVD technique. We report for the first time the thermal conductivity of vertically oriented few-layer (VFL) MoS using the optothermal Raman technique.

A composite prepared from MoS quantum dots and silver nanoparticles and stimulated by mercury(II) is a robust oxidase mimetic for use in visual determination of cysteine.

MoS quantum dots were hydrothermally synthesized and utilized for the formation and stabilization of a nanocomposite with silver nanoparticles (AgNPs) in a single step. This composite was characterized by transmission electron microscopy and zeta potential measurements. It is found that this nanohybrid can be stimulated by mercury(II) ion and then exhibits excellent oxidase mimicking activity.

Nanonetwork of Coordination Polymer AHMT-Ag for the Effective and Broad Spectrum Detection of 6-Mercaptopurine in Urine and Blood Serum.

Nanocrystalline coordination polymers (NCCPs) have been considered as an incredible electrochemical sensor for the effective detection of biologically dynamic drug 6-mercaptopurine (6-MP). In the present report, a significantly stable infinite arrayed coordination polymeric network was self-assembled via metal with efficient organic tecton 4-amino-3-hydrazino-5-mercapto-1,2,4,-triazole (AHMT) in which silver(I) ions are coordinated by AHMT via hydrazino and exocyclic thiol linkage to form AHMT-Ag NCCP. An efficient and highly sensitive detection of 6-MP is attained owing to eminent electron channeling via polymeric nanocrystallite pores.

Corrosion prevention of commercial alloys by air-water interface grown, edge on oriented, ultrathin squaraine film.

Copper is one of the most demanded commercial metal/alloys in world market. The demand for copper in industries such as electrical, electronics, automobile, telecommunications, defence, etc. as well as in daily life has escalated in the recent years due to its versatile physical and chemical properties.

Chitosan based new nanocomposites for corrosion protection of mild steel in aggressive chloride media.

Chitosan is one of the important natural bio-polymers. Besides its good green value, it is rarely used to protect metals in aggressive media in direct form due to rapid degradation of its molecules in acid. Hence, it is necessary to use some means to increase protection efficiency of chitosan.

Vanadium doped few-layer ultrathin MoS nanosheets on reduced graphene oxide for high-performance hydrogen evolution reaction.

In this paper, we demonstrate a facile solvothermal synthesis of a vanadium(v) doped MoS-rGO nanocomposites for highly efficient electrochemical hydrogen evolution reaction (HER) at room temperature. The surface morphology, crystallinity and elemental composition of the as-synthesized material have been thoroughly analyzed. Its fascinating morphology propelled us to investigate the electrochemical performance towards the HER.

Voltammetric determination of the antimalarial drug chloroquine using a glassy carbon electrode modified with reduced graphene oxide on WS quantum dots.

A voltammetric method is described for the determination of chloroquine (CQ) and validated simultaneously by two techniques and in three different conditions. The WS quantum dots (WS QDs) were synthesized by a hydrothermal method and then placed on reduced graphene oxide (rGO) sheets. The resulting composite material was then deposited on a glassy carbon electrode (GCE) where it showed excellent electroactivity.

Application of Unsaturated Fatty Acid Molecules Derived from Microalgae toward Mild Steel Corrosion Inhibition in HCl Solution: A Novel Approach for Metal-Inhibitor Association.

Fatty acid molecules 9,12,15-octadecatrienoic acid (C18:3), 9,12-octadecadienoic acid (C18:2), and hexadecanoic acid (C16:0) possessing active functional groups with the capability of fast electron transfer have been established for effective corrosion inhibition of mild steel. In this regard, a microalga sp. is isolated and its fatty acids have been studied to corroborate the adsorption behavior, attributing the anticorrosion efficacy on mild steel in 1 M HCl solution by forming metal-inhibitor framework.

Donor-π-Acceptor-Type Configured, Dimethylamino-Based Organic Push-Pull Chromophores for Effective Reduction of Mild Steel Corrosion Loss in 1 M HCl.

In this work, donor-π-acceptor-type four crystalline compounds have been tested for the first time to restrict the corrosion of mild steel in 1 M HCl. The details of the compounds are: C1, 4-,-dimethylamino-β-nitrostyrene; C2, 2-(4-(dimethylamino) benzylidene)malononitrile; C3, ethyl 2-cyano-3-(4-(dimethylamino) phenyl)acrylate; and C4, methyl 2-cyano-3-(4-(dimethylamino)phenyl)acrylate. The corrosion inhibition potentials of the compounds have been primarily investigated by electrochemical techniques, such as linear polarization resistance, Tafel polarization curves, and electrochemical impedance spectroscopy.

A nanoporous palladium(II) bridged coordination polymer acting as a peroxidase mimic in a method for visual detection of glucose in tear and saliva.

A nanoporous coordination polymer (NPCP) was prepared from palladium(II) chloride and 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and is shown to act as a peroxidase mimetic. It can catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by HO which is formed on enzymatic oxidation of glucose by glucose oxidase. Based on these findings, a sensitive glucose test was worked out at 652 nm where the intensity if the greenish-blue product is related to the actual concentration of glucose.

Quick colorimetric determination of choline in milk and serum based on the use of MoS nanosheets as a highly active enzyme mimetic.

The authors have synthesized molybdenum disulfide nanosheets (MoS nanosheets) by using a bottom-up hydrothermal method. The nanosheets display strong catalytic (enzyme mimetic) activity in catalyzing the oxidation of peroxidase substrate of 3,3',5,5'-tetramethylbenzidine (TMB) in presence of HO to produce a blue product. The peroxidase mimicking properties of MoS nanosheets depend on temperature, HO concentration and pH value.