A Surface Modified Carbon Nanotube Fiber as a Microelectrode for the pH-Dependent Electrochemical Detection of Vitamin C
ACS Omega, cilt.10, sa.36, ss.41653-41664, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 10 Sayı: 36
- Basım Tarihi: 2025
- Doi Numarası: 10.1021/acsomega.5c05410
- Dergi Adı: ACS Omega
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Directory of Open Access Journals
- Sayfa Sayıları: ss.41653-41664
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
A pH-dependent electrochemical sensor based on nickel–cobalt oxide modified carbon nanotube fiber (NiCo–O@CNTF) has been fabricated via a simple electrochemical approach and utilized in the nonenzymatic detection of ascorbic acid (AA) with varying pH. Scanning electron microscopy (SEM), energy-dispersive electron microscopy (EDX), Raman, and FTIR were utilized to investigate the structural morphologies, elemental mapping, and electronic vibrational modes within the modified fiber (NiCo–O@CNTF) and revealed the successful fabrication of the electrode. Electrochemical characterization, including cyclic voltammetry and chronoamperometry, exhibited an enhanced anodic response in buffer solutions (varying pH), achieving a high sensitivity of 62.39 μA cm–2mM–1, a low detection limit of 16 μM, and a rapid response time of 5 s at pH 8.0. These results highlight NiCo–O@CNTF as a flexible and disposable microelectrode platform for wearable AA sensing applications.