02327nas a2200241 4500008004100000022001400041245015600055210006900211260007300280300001000353490000800363520136000371653002201731653004101753653003901794653002801833653003101861100001801892700001901910700001601929700001301945856012701958 2006 eng d a0927-775700aMicellar behavior of dodecyldimethylethyl ammonium bromide and dodecyltrimethyl ammonium chloride in aqueous media in the presence of diclofenac sodium0 aMicellar behavior of dodecyldimethylethyl ammonium bromide and d aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR a17-250 v2783 a

The micellar properties of cationic surfactants (S) viz. dodecyldimethylethyl ammonium bromide (DDAB) and dodecyltrimethylammonium chloride (DTAC) in aqueous media in the presence of diclofenac sodium (D) have been investigated by spectroscopic and conductivity measurements. The UV-vis and H-1 NMR studies suggest possible packing of diclofenac sodiurn molecules in the micelles. The conductivity studies were carried out over the temperature range 288.15-308.15 K. The critical micelle concentration (cmc) and degree of counterion binding (beta) of the micelles were determined at different temperatures. Delay in micellisation was observed for both DDAB and DTAC. Thermodynamic parameters (Delta G(m)(0) Delta H-m(0) and Delta S-m(0).) for the micelle system were estimated by applying the charged pseudo-phase separation model. The results of the ternary S/D/W system were analysed in comparison with the reported results of binary SAV system. The Delta G(m)(0) values for the ternary S/D/W system in both the cases show an increase in comparison to the respective binary SAV system. However, Delta S-m(0) decreased with temperature and remained positive in both the systems. At lower temperatures, the micellisation was found to be entropy-driven while at higher temperatures it was enthalpy-dfiven. (c) 2005 Elsevier B.V. All rights reserved.

10adiclofenac sodium10adodecyldimethylethylammonium bromide10adodecyltrimethylammoniurn chloride10aElectrical conductivity10aspectroscopic measurements1 aMehta, S., K.1 aBhasin, K., K.1 aKumar, Anil1 aDham, S. uhttps://library.ncl.res.in/content/micellar-behavior-dodecyldimethylethyl-ammonium-bromide-and-dodecyltrimethyl-ammonium-002151nas a2200253 4500008004100000022001400041245009500055210006900150260006900219300001200288490000800300520125700308653002401565653002801589653001301617653002201630100001801652700002001670700001701690700002001707700002201727700002101749856012701770 2011 eng d a0254-058400aFabrication, thermal and electrical properties of polyphenylene sulphide/copper composites0 aFabrication thermal and electrical properties of polyphenylene s aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUL a114-1200 v1283 a

The thermal and electrical properties of high performance poly(phenylene sulphide) (PPS) composites reinforced up to 31 vol% Cu particles were investigated to be used as materials for electronic applications. The thermal stability and char yield of the composites increased significantly. Both pre- and post- glass transition coefficient of thermal expansion (CTE) of composites decreased significantly. The microhardness was increased by more than 50% compared to pure PPS matrix. Microhardness and CTE of composites correlated well with the rule of mixtures. A percolation threshold about 6 vol% Cu was obtained. The electrical conductivity was increased by about eight orders of magnitude for 18 vol% composite. Dielectric constant and dissipation factor of composites at 1 MHz was increased by about 6-fold and 70-fold compared to matrix, respectively. They decreased gradually with increasing frequency up to 1 MHz and thereafter, there was insignificant change. The scanning electron microscope showed almost uniform distribution of Cu particles in the matrix. Owing to better dimensional stability and good electrical properties, these composites are very promising for electronic applications. (C) 2011 Elsevier B.V. All rights reserved.

10aDielectric property10aElectrical conductivity10ahardness10aThermal expansion1 aGoyal, R., K.1 aKambale, K., R.1 aNene, S., S.1 aSelukar, B., S.1 aArbuj, Sudhir, S.1 aMulik, Uttam, P. uhttps://library.ncl.res.in/content/fabrication-thermal-and-electrical-properties-polyphenylene-sulphidecopper-composites-001683nas a2200241 4500008004100000022001400041245009300055210006900148260006900217300001400286490000800300520082500308653002301133653001901156653002801175653001401203100002001217700001901237700001801256700001801274700002201292856012701314 2011 eng d a0925-838800aSynthesis and characterization of chemically deposited nickel substituted CdSe thin film0 aSynthesis and characterization of chemically deposited nickel su aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB a2948-29510 v5093 a

The technologically important Cd(0.5)Ni(0.5)Se thin film has been developed by solution growth technique on non-conducting glass substrate in tartarate bath containing Cd(+2), Ni(+2) ions and sodium selenosulphate in an aqueous alkaline medium at room temperature. Various preparative conditions of the thin films are outlined. The films were characterized by X-ray diffraction, scanning electron microscope, optical absorption and electrical measurements. The X-ray diffraction study indicates that the film is polycrystalline in nature with hexagonal phase. Scanning electron micrograph shows that the film is homogeneous with well-defined grains. The films have high optical absorption coefficient. Thermoelectric power measurement shows p-type conduction mechanism. (C) 2010 Elsevier B.V. All rights reserved.

10aChemical synthesis10aCrystal growth10aElectrical conductivity10athin film1 aHankare, P., P.1 aJadhav, B., V.1 aChate, P., A.1 aSathe, D., J.1 aMulla, Imtiaz, S. uhttps://library.ncl.res.in/content/synthesis-and-characterization-chemically-deposited-nickel-substituted-cdse-thin-film-002348nas a2200265 4500008004100000022001400041245014300055210006900198260000800267300001200275490000800287520138500295653003201680653002801712100001801740700002001758700001701778700002201795700001901817700001901836700003201855700003601887700003001923856012901953 2023 eng d a0002-786300aTailoring COFs: transforming nonconducting 2D layered COF into a conducting quasi-3D architecture via interlayer knitting with polypyrrole0 aTailoring COFs transforming nonconducting 2D layered COF into a  cDEC a487-4990 v1463 a

Improving the electronic conductivity and the structural robustness of covalent organic frameworks (COFs) is paramount. Here, we covalently cross-link a 2D COF with polypyrrole (Ppy) chains to form a quasi-3D COF. The 3D COF shows well-defined reflections in the SAED patterns distinctly indexed to its modeled crystal structure. This knitting of 2D COF layers with conjugated polypyrrole units improves electronic conductivity from 10(-9) to 10(-2 )S m(-1). This conductivity boost is affirmed by the presence of density of states near the Fermi level in the 3D COF, and this elevates the COF's valence band maximum by 0.52 eV with respect to the parent 2D pyrrole-functionalized COF, which agrees well with the opto-electro band gaps. The extent of HOMO elevation suggests the predominant existence of a polaron state (radical cation), giving rise to a strong EPR signal, most likely sourced from the cross-linking polypyrrole chains. A supercapacitor devised with COF20-Ppy records a high areal capacitance of 377.6 mF cm(-2), higher than that of the COF loaded with noncovalently linked polypyrrole chains. Thus, the polypyrrole acts as a ``conjugation bridge'' across the layers, lowering the band gap and providing polarons and additional conduction pathways. This marks a far-reaching approach to converting many 2D COFs into highly ordered and conducting 3D ones.

10acovalent organic frameworks10aElectrical conductivity1 aJain, Chitvan1 aKushwaha, Rinku1 aRase, Deepak1 aShekhar, Pragalbh1 aShelke, Ankita1 aSonwani, Disha1 aAjithkumar, Thalasseril, G.1 aVinod, Chathakudath, Prabhakara1 aVaidhyanathan, Ramanathan uhttps://library.ncl.res.in/content/tailoring-cofs-transforming-nonconducting-2d-layered-cof-conducting-quasi-3d-architecture02266nas a2200217 4500008004100000022001400041245012100055210006900176260000900245300001400254490000700268520147700275653004101752653002801793653001901821653001501840653002101855100001901876700002401895856012901919 2024 eng d a2050-748800aConductive metal-organic frameworks for zinc-air battery application: design principles, recent trends and prospects0 aConductive metalorganic frameworks for zincair battery applicati cJAN  a2605-26190 v123 a

Electrochemical energy conversion and storage systems have an indispensable place in the modern world to fulfill the increasing energy demands. Among the different storage devices, rechargeable zinc-air batteries (ZABs) have become one of the most promising energy technologies owing to the abundance and inexpensiveness of Zn, simple operation, environmental friendliness, and reasonable energy density. However, the sluggishness of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) occurring in ZABs is a serious obstacle in their progress and commercialization. This creates a need for the development of efficient bifunctional electrocatalysts for ORR and OER. Conductive metal-organic frameworks (cMOFs) imbibing the general properties of MOFs, like high surface area, tunable porosity, redox-active centers, and additional intrinsic conductivity, can be a very lucrative option for developing bifunctional ORR and OER electrocatalysts for ZAB applications. In this review, we discuss the conductivity and design strategies of conductive MOFs, the basic configuration of ZABs, and the use of cMOFs for ZAB applications. The future directions for the improvement of cMOFs for ZABs have been provided, which hopefully will incite interest among researchers for further exploring cMOFs for ZABs. Electrochemical energy conversion and storage systems have an indispensable place in the modern world to fulfill the increasing energy demands.

10aBiofunctional Oxygen Electrocatalyst10aElectrical conductivity10aEnergy storage10aFuel-Cells10ali-ion batteries1 aDevi, Bandhana1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/conductive-metal-organic-frameworks-zinc-air-battery-application-design-principles-recent02330nas a2200241 4500008004100000022001400041245010300055210006900158260000800227300001100235490000700246520150900253653001701762653002801779653002401807653001401831653002601845653002601871100002501897700002001922700002101942856012501963 2026 eng d a1861-472800aFacile synthesis of fluoride-free mxene nanosheets as an efficient anode for lithium-ion capacitor0 aFacile synthesis of fluoridefree mxene nanosheets as an efficien cJAN ae705620 v213 a

MXenes are a promising class of two-dimensional (2D) nanomaterials known for their exceptional metallic conductivity and adjustable surface chemistry. However, the current state-of-the-art synthesis methods rely on the chemical etching of MAX phase (e.g., Ti3AlC2) with HF or fluoride-based compounds, leading to fluorine-terminated MXenes. These MXenes suffer from poor stability in ambient conditions, restricting their applications, particularly in lithium-ion-based batteries and capacitors (LIBs and LICs). In this study, we present a two-step method to produce fluorine-free MXene, addressing the stability issues of MXene in aqueous dispersions and relatively improved performance in LICs. Specifically, an efficient etching process employing hydroiodic acid (HI) with vinegar is used for the selective removal of the A layer from the MAX phase, resulting in F-free exfoliated MXenes (HVM). The HVM shows an outstanding electrical conductivity of 388 S cm(-1), maintaining high stability in aqueous dispersions over two weeks. HVM as electrode shows significantly enhanced Li+ ion storage capabilities, delivering a discharge capacity of 295 mAh g(-1) over 500 cycles at 1 A g(-1), substantially outperforming MXenes derived from F-based etching approaches. Furthermore, the HI-vinegar etching mechanism introduces unique surface functionalities that provide HVM superior cycling stability and rate capability, enabling more stable, high-performance MXene-based energy storage devices.

10a2D materials10aElectrical conductivity10afluoride-free MXene10aHVM anode10aLithium-ion capacitor10alithium-ion diffusion1 aPawar, Meenakshi, D.1 aShinde, Dhanraj1 aShelke, Manjusha uhttps://library.ncl.res.in/content/facile-synthesis-fluoride-free-mxene-nanosheets-efficient-anode-lithium-ion-capacitor