Investigation of modified basal plane pyrolytic graphite electrodes: definitive evidence for the electrocatalytic properties of the ends of carbon nanotubesElectronic supplementary information (ESI) available: the use of CNT-modified electrodes in electrochemistry, and SEM images of MWNTs before immobilisation and after modification of a basal plane pyrolytic graphite electrode. See http://www.rsc.org/suppdata/cc/b4/b406174h/

2004 ◽  
pp. 1804 ◽  
Author(s):  
Craig E. Banks ◽  
Ryan R. Moore ◽  
Trevor J. Davies ◽  
Richard G. Compton
Keyword(s):  
Basal Plane ◽  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Modified Electrodes ◽  
Supplementary Information ◽  
Sem Images ◽  
Graphite Electrodes ◽  
Electrocatalytic Properties ◽  
Definitive Evidence ◽  
Pyrolytic Graphite Electrode

scholarly journals Cryptand-Functionalized Highly Oriented Pyrolytic Graphite Electrodes

2021 ◽  
Vol 13 (8) ◽  
pp. 4158
Author(s):  
Marcos A. Bento ◽  
Sara Realista ◽  
Ana S. Viana ◽  
Ana M. Ferraria ◽  
Paulo N. Martinho
Keyword(s):  
Photoelectron Spectroscopy ◽  
Diazonium Salt ◽  
Pyrolytic Graphite ◽  
Coupling Reaction ◽  
Modified Electrodes ◽  
Current Response ◽  
Highly Oriented Pyrolytic Graphite ◽  
Graphite Electrodes ◽  
Pyrolytic Graphite Electrode ◽  
20 Nm

Reproducible materials that have detection properties towards a certain molecule are very important for applications in the fabrication of devices. Among all the substrates that are used, highly oriented pyrolytic graphite allows to clearly image a monolayer. On the other hand, cryptand molecules are versatile because they can sense certain analytes with high selectivity. The highly oriented pyrolytic graphite electrode was first functionalized with an aryl bearing a bromine or an alkyne group to further attach cryptand molecules to its surface. The functionalization was performed through the electroreduction of aryl diazonium salts. While functionalization with an aryl-bromine produced a 20 nm-thick dendritic layer, functionalization of the surface with an aryl bearing a terminal alkyne produced a 9.7 nm-thick multilayer. However, if the diazonium salt is prepared in situ, a 0.9 nm monolayer with aryl–alkyne groups is formed. The alkyne functionalized electrode reacted with a bromo-cryptand through a Sonogashira C–C coupling reaction yielding electrodes functionalized with cryptands. These were immersed in a solution of a Co(II) salt resulting in Co(II)-cryptate modified electrodes, highlighting the ability of the cryptands’ modified electrode to sense metal ions. The electrode surface was analyzed by X-ray photoelectron spectroscopy after each modification step, which confirmed the successful functionalization of the substrate with both the cryptand and the cryptate. Cyclic voltammetry studies showed stable current response after approximately six cycles. Different reduction processes were detected for both cryptand (−1.40 V vs. SCE) and cryptate (−1.22 V vs. SCE) modified highly oriented pyrolytic graphite.

Highly Sensitive and Selective Basal Plane Pyrolytic Graphite Electrode Modified with 1,4-Naphthoquinone/MWCNT for Simultaneous Determination of Dopamine, Ascorbate and Urate

2013 ◽  
Vol 25 (3) ◽  
pp. 723-731 ◽  
Author(s):  
Ananda Xavier Oliveira ◽  
Saimon Moraes Silva ◽  
Fernando Roberto Figueiredo Leite ◽  
Lauro Tatsuo Kubota ◽  
Flavio Santos Damos ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Basal Plane ◽  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Highly Sensitive ◽  
Pyrolytic Graphite Electrode

Development of a sensor for L-Dopa based on Co(DMG)2ClPy/multi-walled carbon nanotubes composite immobilized on basal plane pyrolytic graphite electrode

2012 ◽  
Vol 86 ◽  
pp. 22-29 ◽  
Author(s):  
Fernando Roberto Figueirêdo Leite ◽  
Camila Marchetti Maroneze ◽  
Adriano Bof de Oliveira ◽  
Wallans Torres Pio dos Santos ◽  
Flavio Santos Damos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Basal Plane ◽  
Graphite Electrode ◽  
Pyrolytic Graphite ◽  
Multi Walled Carbon Nanotubes ◽  
Pyrolytic Graphite Electrode ◽  
Walled Carbon Nanotubes
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