Elektrokimyasal algılamada fulleren türevlerinin ve pirol bazlı kompozitlerin karakterizasyonu


Ertuğrul Uygun H. D.

4th International Euroasian Conference on Science, Engineering and Technology, Ankara, Türkiye, 14 - 16 Aralık 2022, ss.12

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Ankara
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.12
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Fullerenes are carbon-derived nanomaterials with a spherical and 0-D structure. They have a large surface area because of their spherical structure. Since the large surface area increases the sensitivity of the system, the use of fullerenes in sensor systems has increased in recent years. Surface formation by electropolymerization of conductive monomers on the electrode surface is quite common in sensor fabrication. Pyrrole (PPy) is one of the most commonly used of these monomers. In this study, the effect of fullerene and its derivatives on pyrrole polymerization was investigated using a gold nanoparticle screen printed electrode. Fullerene, polyhydroxylated fullerene and carboxy fullerene were selected derivatives. All of them were added to the polymerization solution separately and the resulting surface were characterized X-ray Photoelectron Spectroscopy (XPS) and scanning electron microscopy (SEM). The conductivity change of the formed structures was investigated by electrochemical impedance spectroscopy (EIS). Electropolymerization was carried out by cyclic voltammetry (CV) method.CV parameters for the PPy electropolymerization were determined as 0.1 and +0.5 V potential range with 50 mV/s scan rate for 5 cycles in 100mM H2SO4. SEM analysis was performed to monitor the surface morphology of the electrodes. For SEM analysis, the electrodes were coated with a thin gold layer for better analysis. For this, an ion coater device was used. SEM analysis was performed under high vacuum using an application voltage of 20 kV. The appropriate spot size for the desired magnifications was determined as 12. XPS analysis was performed to determine the electrode element composition and surface chemistry. A Monochromatic Al-Kα (1486.7 eV) X-ray source and a beam size of 400 nm in diameter were used for the XPS measurement. The survey scan of the XPS was carried out from −10 to 1350 eV with a scanning speed of 1 eV applying pass energy of 150 eV.