Simultaneous insulation and modification of quartz tuning fork surface by single-step plasma polymerization technique wi
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Research Letter
Simultaneous insulation and modification of quartz tuning fork surface by single-step plasma polymerization technique with amine-rich precursors Gizem Kaleli Can, Hatice Ferda Özgüzar, and Gözde Kabay, Plasma Aided Biomedical Research Group (pabmed), Biomedical Engineering Division, Graduate School of Science and Technology, TOBB University of Economics and Technology, Ankara 06560, Turkey Pelin Kömürcü, Plasma Aided Biomedical Research Group (pabmed), Micro- and Nano-Technology Division, Graduate School of Science and Technology, TOBB University of Economics and Technology, Ankara 06560, Turkey Mehmet Mutlu, Biomedical Engineering Department, Engineering Faculty, Plasma Aided Biomedical Research Group (pabmed), TOBB University of Economics and Technology, Ankara 06560, Turkey Address all correspondence to Mehmet Mutlu at [email protected] (Received 3 February 2018; accepted 13 April 2018)
Abstract Amine-based plasma polymer thin films (NH2-PPTFs) are favorable due to their potential ability for binding a variety of biomolecules, especially in biotechnologic studies. In this context, to understand the effect of different amine sources on quartz tuning forks’ (QTF) surface functionalization and isolation, we prepared PPTFs by single-step plasma polymerization process. The amino-group concentration of PPTF’s was proportionally increased by increasing discharge powers, whereas not affected from exposure time. It was observed that the resistivity increased with the increasing molecular weight of the precursor. In conclusion, NH2-PPTF-modified QTFs present as a great candidate for future biotechnologic applications.
Introduction The plasma polymerization technique is a commonly used method to achieve tailor-made and ångström (Å) scale thin films. Plasma polymerization offers easily controllable, environmentally friendly, and inexpensive processing of various materials when compared with the wet chemical methods. It is known that the plasma-polymerized thin films (PPTFs) have a random network and highly crosslinked film density.[1,2] These advantageous properties make this technique a distinguished candidate for biotechnologic applications.[3] Ideally, thin films must possess some properties such as high stability, slow aging process, and uniformity.[4–6] So far, to achieve these features, precursors such as ethylenediamine,[5,7,8] amylamine,[2,3] heptylamine,[9] cyclopropylamine,[10] trans-1,2diaminocyclohexane[11–13] were studied by employing plasma polymerization and amine-based PPTFs (NH2-PPTFs) have been produced for biotechnologic applications because of providing covalent bonding with biomolecules such as proteins, enzymes, or living cells.[4,14] In order to achieve an active surface for biomolecule immobilization, amine-rich coatings are crucial, especially in biosensing studies.[15] Among biosensing technologies, mass sensitive devices are highly preferred due to their high precision and sensitivity. Although piezoelectric-based quartz crystal (QC) transducers are highly used for the preparation of m
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