02413nas a2200253 4500008004100000022001400041245008700055210006900142260006900211300001400280490000800294520152300302653002401825653001101849653003401860653002301894653003101917100002401948700002001972700001801992700002002010700001802030856011102048 2006 eng d a0257-897200aFormation of poly(o-anisidine) coatings on copper from aqueous salicylate solution0 aFormation of polyoanisidine coatings on copper from aqueous sali aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY a5557-55650 v2003 a

Poly(o-anisidine) coatings have been electrosynthesized by using cyclic voltammetry on copper from an aqueous salicylate medium. Cyclic voltammetry, UV-visible absorption spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy were used to characterize these coatings, which indicates that the aqueous salicylate solution is a suitable medium for the electrochemical polymerization of o-anisidine on copper substrate. Cyclic voltammetry accompanied by the X-ray photoelectron spectroscopy was used to characterize the surface modifications induced by polarizing the copper substrate in the aqueous salicylate solution (without monomer). It was shown that the polarization of the copper in the aqueous salicylate medium results into the passivation of its surface via the formation of Cu(2)O and/or copper salicylate complex. It was found that the electrochemical polymerization of o-anisidine takes place after the passivation of the copper substrate via fort-nation of Cu(2)O and/or copper salicylate complex and results into the formation of shiny, uniform and strongly adherent poly(o-anisidine). The optical absorption spectroscopy reveals the formation of emraldine salt form of poly(o-anisidine). This study offers an electrochemical polymerization recipe to synthesize strongly adherent poly(o-anisidine) coating on copper from aqueous media for possible use in corrosion protection application. (c) 2005 Elsevier B.V. All rights reserved.

10aconducting polymers10aCopper10acorrosion protective coatings10acyclic voltammetry10apoly(o-anisidine) coatings1 aChaudhari, Sudeshna1 aMandale, A., B.1 aPatil, K., R.1 aSainkar, S., R.1 aPatil, P., P. uhttps://library.ncl.res.in/content/formation-polyo-anisidine-coatings-copper-aqueous-salicylate-solution-001970nas a2200253 4500008004100000022001400041245008700055210006900142260006900211300001400280490000800294520108000302653003201382653001101414653003301425653002301458653003101481100001501512700002001527700001801547700002001565700001801585856011301603 2006 eng d a0257-897200aPoly(o-toluidine) coatings on copper: electrochemical synthesis from aqueous media0 aPolyotoluidine coatings on copper electrochemical synthesis from aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcAPR a5094-51010 v2003 a

Poly(o-toluidine) (POT) coatings were synthesized on copper (Cu) by electrochemical polymerization of o-toluidine using aqueous sodium oxalate solution as supporting electrolyte. The resulting coatings were uniform, compact and strongly adherent to the Cu substrate. These coatings were characterized by using cyclic voltammetry, UV-visible absorption spectroscopy, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) measurements and X-ray photoelectron spectroscopy (XPS). The results of these studies reveal that the sodium oxalate is suitable supporting electrolyte for the electrochemical polymerization of o-toluidine on Cu substrate. It is found that the electrochemical polymerization of o-toluidine takes place after the passivation of the Cu substrate via formation of copper oxalate (CuC2O4, H2O) layer, which is confirmed by XRD and XPS. The optical absorption spectroscopy study reveals the exclusive formation of the pernigraniline base (PB) form of POT. (c) 2005 Elsevier B.V. All rights reserved.

10aConducting polymer coatings10aCopper10aCorrosion resistant coatings10acyclic voltammetry10apoly(o-toluidine) coatings1 aShinde, V.1 aMandale, A., B.1 aPatil, K., R.1 aGaikwad, A., B.1 aPatil, P., P. uhttps://library.ncl.res.in/content/polyo-toluidine-coatings-copper-electrochemical-synthesis-aqueous-media-002295nas a2200253 4500008004100000022001400041245017400055210006900229260007300298300001400371490000800385520135300393653001701746653001101763653001101774653001901785653001501804653000801819100002501827700001801852700002001870700002301890856012801913 2011 eng d a0169-433200aSynthesis of Cu-ZnO and C-ZnO nanoneedle arrays on zinc foil by low temperature oxidation route: effect of buffer layers on growth, optical and field emission properties0 aSynthesis of CuZnO and CZnO nanoneedle arrays on zinc foil by lo aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG a8366-83720 v2573 a

Different densities of ZnO nanoneedle films have been prepared by pre-coated zinc foils with thin layer of copper and carbon followed by thermal oxidation at 400 degrees C in air. The X-ray diffraction patterns show well defined peaks, which could be indexed to the wurtzite hexagonal phase of ZnO. The scanning electron microscope images clearly reveal formation of ZnO needles on the entire substrate surface. The X-ray photoelectron spectroscopy studies indicate that Cu and C ions are incorporated into the ZnO lattice. Photoluminescence studies evaluate different emission bands originated from different defect mechanism. From the field emission studies, the threshold field, required to draw emission current density of similar to 100 mu A/cm(2), is observed to be 2.25 V/mu m and 1.57 V/mu m for annealed zinc foil pre-coated with copper and carbon, respectively. The annealed film with copper layer exhibits good emission current stability at the pre-set value of similar to 100 mu A over a duration of 4 h. The results show that buffer layer is an important factor to control the growth rate, resulting in different density of ZnO needles, which leads to field emission properties. This method may have potential in fabrication of electron sources for high current density applications. (C) 2011 Elsevier B. V. All rights reserved.

10aBuffer layer10aCarbon10aCopper10afield emission10aNanoneedle10aZnO1 aJamali-Sheini, Farid1 aPatil, K., R.1 aJoag, Dilip, S.1 aMore, Mahendra, A. uhttps://library.ncl.res.in/content/synthesis-cu-zno-and-c-zno-nanoneedle-arrays-zinc-foil-low-temperature-oxidation-route-0