Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Helena M. Carapuça"'
Publikováno v:
Thin Solid Films. 518:5881-5888
Ultrathin multilayer films containing metal-substituted polyoxometalates, [PW11FeIII(H2O)O39]4− (PW11Fe) or [SiW11FeIII(H2O)O39]5− (SiW11Fe), and poly(ethylenimine) (PEI) were prepared by the electrostatic layer-by-layer self-assembly method on a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d535f68495f62c738c506e3caec2bdc
https://doi.org/10.1016/j.tsf.2010.05.065
https://doi.org/10.1016/j.tsf.2010.05.065
Autor:
Ana M. V. Cavaleiro, Susana Simões, Christopher M.A. Brett, Helena M. Carapuça, Diana M. Fernandes
Publikováno v:
Journal of Electroanalytical Chemistry. 639:83-87
Novel poly(hexylmethacrylate) carbon composite electrodes have been prepared from graphite powder and poly(hexylmethacrylate) binder, and modified with Keggin-type polyoxotungstate anions in the form of tetra-n-butylammonium (TBA) hybrid salts. The s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7172bf61f925fbbe745625c6f672a13
https://doi.org/10.1016/j.jelechem.2009.11.020
https://doi.org/10.1016/j.jelechem.2009.11.020
Publikováno v:
Journal of Electroanalytical Chemistry. 626:192-196
In this work, polyelectrolyte coatings assembled on glassy carbon/thin mercury film electrodes, as an adsorbed layer of poly(sodium 4-styrenesulfonate) (PSS), were studied. The goal was to search for the best conditions for the production of stable P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::709ab02011ae5664261bd8b731d655ab
https://doi.org/10.1016/j.jelechem.2008.11.001
https://doi.org/10.1016/j.jelechem.2008.11.001
Publikováno v:
Electrochimica Acta. 53:6580-6588
Novel glassy carbon modified electrodes were functionalised with tetra- n -butylammonium (TBA) hybrid salts of several α-Keggin-type polyoxosilicotungstate anions. The salts were immobilized via a one-step deposition of micrometer thick coatings by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4add1dd1d7a2fc9b59548315a521cd6
https://doi.org/10.1016/j.electacta.2008.04.071
https://doi.org/10.1016/j.electacta.2008.04.071
Publikováno v:
Journal of Electroanalytical Chemistry. 610:37-45
In this work, the performance and applicability of the thin mercury film electrode (TMFE) in the heavy metal speciation, by stripping chronopotentiometry (SCP), were exploited. The TMFE thickness was optimized and a 7.6 nm mercury film was selected.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30466d08d12ac937672930aea20cb78d
https://doi.org/10.1016/j.jelechem.2007.06.018
https://doi.org/10.1016/j.jelechem.2007.06.018
Publikováno v:
Electrochimica Acta. 52:1182-1190
Glassy carbon electrodes coated with adsorbed single layers of the cationic polyelectrolyte poly(allylamine hydrochloride), PAH, were produced by solvent evaporation for subsequent development of PAH modified thin mercury film electrodes (PAH/TMFE).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9909222fcb62bcae2bab35dc870d5eed
https://doi.org/10.1016/j.electacta.2006.06.045
https://doi.org/10.1016/j.electacta.2006.06.045
Autor:
Helena M. Carapuça, Luciana S. Rocha
Publikováno v:
Bioelectrochemistry. 69:258-266
The incorporation/exclusion features of dopamine (DA), ascorbic acid (AA) and uric acid (UA) are evaluated for Nafion (NA)-coated glassy carbon electrodes (GCE) of different thicknesses. The ion-exchange partition of DA(+) between the NA film and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c69fbfe5b3162dccec98a9df7a73eddb
https://doi.org/10.1016/j.bioelechem.2006.03.040
https://doi.org/10.1016/j.bioelechem.2006.03.040
Publikováno v:
Langmuir. 22:8241-8247
This work aimed to produce improved polymer coatings for the modification of thin mercury film electrodes (TMFEs). The goal is to obtain sensitive, reproducible, mechanically stable and antifouling devices suitable for the determination of trace meta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ae3c577615569d9fcfb4fe0863aac95
https://doi.org/10.1021/la060263s
https://doi.org/10.1021/la060263s
Publikováno v:
Talanta. 68:1655-1662
The present work describes the preparation, optimization and characterization of mixed polyelectrolyte coatings of poly-l-lysine (PLL) and poly(sodium 4-styrenesulfonate) (PSS) for the modification of thin mercury film electrodes (MFEs). The novel-mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5132fb5705e03a53f2ab56091b4874d
https://doi.org/10.1016/j.talanta.2005.08.029
https://doi.org/10.1016/j.talanta.2005.08.029
Publikováno v:
Talanta
Talanta, Elsevier, 2005, 66, pp.844-857. ⟨10.1016/j.talanta.2004.12.036⟩
Talanta, Elsevier, 2005, 66, pp.844-857. ⟨10.1016/j.talanta.2004.12.036⟩
Studies of trace metal mobilization in sediments are generally performed using sequential extraction schemes at equilibrium. In the present work, a kinetic fractionation of trace metals in sediments has been developed to assess that information. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1e0fa339b410c79c4f63a2092eebc04
https://doi.org/10.1016/j.talanta.2004.12.036
https://doi.org/10.1016/j.talanta.2004.12.036