Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Conference Object Citation - WoS: 1Plasmonic Functional Assay Platform for Measuring Single Cell Growth through Refractive Index Sensing(Optical Society of America, 2023) Avci, M.B.; Topkaya, S.N.; Yalcin-Ozuysal, O.; Khademhosseini, A.; Çetin, A.E.Measuring cell growth on adhesive substrates is critical for understanding cell biophysical properties and drug response. Traditional optical techniques have low sensitivity and vary in reliability depending on cell type, while microfluidic technologies rely on cell suspension. In this study, a new platform has been developed that is able to measure the weight and growth of individual cells in real−time. The platform can determine the growth rates of cells in just 10 minutes and map the growth of cell populations in short intervals. It can also identify differences in the growth of different subpopulations within a larger group. The platform was used to study the growth of MCF−7 cells and the impact of two intracellular metabolic processes on cell proliferation. The platform demonstrated the negative effect of serum starvation on cell growth and the role of a particular enzyme, ornithine decarboxylase (ODC), in cell proliferation. It was also able to show the ability of an external factor, putrescine, to rescue cells from the inhibitory effects of low osmolarity. In addition to measuring intracellular processes, the platform can determine the response of cancer cells to drug treatment. It showed the susceptibility of MCF−7 cells to a particular drug, difluoromethylornithine (DFMO), and the ability of a resistant subpopulation to survive in the presence of the drug. The platform’s ability to quickly measure cell growth in small samples makes it a potential tool for both research and clinical use. © 2023 SPIE.Article Citation - WoS: 3Citation - Scopus: 3Compact Multilayer Thin-Film Color Filters and Direct Integration on White-Light Diodes for Color Conversion(Optical Society of America, 2021) Yiğen, Serap; Ekmekçioğlu, Merve; Özdemir, Mehtap; Aygün, Gülnur; Özyüzer, LütfiWe present highly efficient green, yellow, and red filters based on a metal-dielectric structure. The filters encompass only five layers of alternating zinc tin oxide and silver thin films that are grown on soda lime glass and white light-emitting diodes (LEDs) using direct current magnetron sputtering at room temperature. The designed filters provide efficient color filtering in the visible spectrum. High purity colored light is obtained by direct application of filters on LEDs as color converters. The presented method offers an easy way for realizing different colors by tuning the thicknesses of layers in the structure. (C) 2021 Optical Society of America