Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
Browse
2 results
Search Results
Now showing 1 - 2 of 2
Article Citation - WoS: 3Citation - Scopus: 3Reusable polymer-based fluorescent sensor nanoprobe for selective detection of cd<sup>2+</sup> ions in real water sources(Royal Society of Chemistry, 2024) Karabıyık, Merve; Ebil, ÖzgençCadmium, which is classified as a highly toxic metal among all heavy metals, poses a threat to the environment and human health, even at trace levels. In this study, for the first time in the literature, a fluorescent sensor nanoprobe that can selectively detect Cd2+ ions in different real water sources has been developed by attaching a CdTe QD-4 amino TEMPO complex to an iCVD deposited cross-linked copolymer surface with high mechanical strength. Under the appropriate conditions such as pH, concentration, type of solvent and reaction time, the interaction between Cd2+ ions and the polymer-based QD-4AT nanoprobe was enhanced, and the detection of this target ion with high selectivity was made possible even in the environments with complex structures containing different heavy metal ions. The limit of detection (LOD) of Cd2+ ions with this proposed polymer sensor nanoprobe was found to be 0.195 mu M by using the linear detection region of 0.0784-2.5 mu M (R-2 > 0.997). In the literature, several sensor probes have been developed for the detection of Cd2+ ions and have only been investigated for single use in liquid media. The polymer sensor nanoprobe developed in this study has high sensitivity and selectivity in terms of detection limit compared to the previous ones, and the results obtained from the multiple use studies indicate that this nanoprobe can be used more than once for ion detection without loss of performance. This is a brand-new product for fluorescence sensing studies and will be a great source of inspiration for them.Article Citation - WoS: 13Citation - Scopus: 14Robust Fluorinated Siloxane Copolymers Via Initiated Chemical Vapor Deposition for Corrosion Protection(Springer, 2021) Cihanoğlu, Gizem; Ebil, ÖzgençHomopolymers of 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (V4D4), 2-(perfluorohexyl)ethyl acrylate (PFHEA) and 2-(perfluoroalkyl)ethyl methacrylate (PFEMA) and their copolymers were synthesized via initiated chemical vapor deposition (iCVD). All coatings exhibited excellent adhesion to substrates. The corrosion resistance of iCVD coatings was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. In addition, chemical durability of various organic solvents and adhesion to the substrate were also evaluated. Tafel polarization measurements in 5 wt% NaCl solution revealed that the corrosion rates as low as 0.002 mpy on zinc substrates can be reached with 250-nm-thick iCVD-synthesized polymers which is lower than previously reported polymer coatings and more than three orders of magnitude lower than bare zinc. EIS analysis coupled with equivalent electric circuits model confirmed that poly(V4D4) and poly(PFHEA) homopolymers show extremely high protection efficiencies (similar to 99%) on zinc, while poly(V4D4-co-PFHEA) copolymer with slightly lower corrosion efficiency (85-91%) provides a better anticorrosion barrier with weight loss reduction by 57 and 45% for copper and zinc, respectively, and with improved chemical and mechanical properties. The results indicate that iCVD process enables fabrication of finely tuned fluorinated siloxane copolymer conformal coatings for corrosion protection on a variety of substrates.