Silver nanowire/chitosan nanocomposite dry electrodes for electrocardiogram

---

Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye

Tezin Onay Tarihi: 2019

Tezin Dili: İngilizce

Öğrenci: SÜLEYMAN KAZIM SÖMEK

Asıl Danışman (Eş Danışmanlı Tezler İçin): Hüsnü Emrah Ünalan

Özet:

Nanocomposites of chitosan and silver nanowires (Ag NWs) were fabricated and their mechanical, thermal, electrical and antibacterial properties were investigated. A simple solvent casting method was used for the fabrication of nanocomposites with different Ag NW loadings ranging from 1 wt.% to 40 wt.%. Nanowires showed excellent dispersion in chitosan matrix. Antibacterial properties of the Ag NW/ chitosan nanocomposites were investigated against different bacteria strains of American type culture Collection (ATCC) using conventional microbiological methods. Prepared nanocomposites were found to have high antibacterial affect against Staphylococcus aureus, (ATCC #25923), Escherichia coli (ATCC#25922), Bacillus cereus (ATCC#14603) and Candida albicans (ATCC #90028) strains. Following the demonstration of antibacterial activity, fabricated nanocomposites were used as in-vitro electrocardiogram (ECG) electrodes. ECG measurement results showed that higher nanowire loadings within the nanocomposites have better performance in terms of recording useful ECG signals. Results presented herein showed that the Ag NW/ chitosan nanocomposites have a very high potential to be used as dry electrodes for ECG and offers simple and easy fabrication.