In situ AFM/STM characterization of porphyrin electrode films for electrochemical detection of neurotransmitters

Evidence for heme release in layer-by-layer assemblies of myoglobin and polystyrenesulfonate on pyrolitic graphite

“…Prior to use, the pyrolitic graphite electrode was abraded using P1000 SiC sandpaper and ultrasonicated in Millipore Milli-Q water for 1 min. The electrode was dried in a N 2 stream for 5 s. The electrode was immersed in the hemin solution for 10 min to saturate the surface with hemin [28,29], after which the electrode was rinsed with water.…”

Amperometric Metronidazole Sensor Based on the Supermolecular Recognition by Metalloporphyrin Incorporated In Carbon Paste Electrode

“…Some efforts have also been focused on the current utility of such compounds as the active material in the development of amperometric electrodes coated with porphyrin. Frey [14] and Duony [15] used TPP-coated glassy carbon electrode for the detection of heavy metalion (Cu ++ ) and electropolymerized protoporphyrin based graphite carbon electrode for dopamine determination. However, these procedures suffer from the insufficient stability of the modified porphyrin film on the electrode.…”

Surface Morphology of Fe(III)-Porphyrin Thin Layers as Characterized by Atomic Force Microscopy

“…Moreover, nanometer size small molecules have become the focus of surface science studies [4]. Recently porphyrins have more interest to be examined after known that size of the molecules in nanometer orde [5][6][7][8]. Porphyrin supramolecular structures can be formed on metal substrate surfaces as a result of metal-porphyrin and porphyrin-porphyrin interactions [9].…”

“…There have been several fascinating studies of coupling between the porphyrin molecules and the thin layers of substrates [13][14][15][16][17]. Magnetic characteristics and the effect of external magnetic fields on molecules metalloporphyrin have been studied [18][19][20].Charge carrier mobility under the influence of a magnetic field in Hall effect configuration on porphyrin-based materials has also been observed [21][22][23][24][25][26][27].For the detection of neurotransmitters, graphite electrodes coated by electropolymerized porphyrins have been studied since1997 [6]. Fabrication of the solid state sensor by porphyrin derivatives on glass substrates for optochemical sensing of HCl gas has also been reported in 2012 [28].…”