Browsing by Author "Şahin, B."
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Item Open Access Influence of coumarin as an additive on CuO nanostructures prepared by successive ionic layer adsorption and reaction (SILAR) method(Elsevier, 2013) Bayansal, F.; Şahin, B.; Yüksel, M.; Bıyıklı, Necmi; Çetinkara, H. A.; Güder, H. S.The effect of coumarin doping during the growth of CuO nanostructures by SILAR method has been studied. It was found that coumarin considerably influences the growth process, manipulates the bandgap and modifies the crystallite size of the films. XRD experiments evidenced that with higher coumarin concentrations in the growth solution, the microstrain and dislocation density increased, while the crystallite size of the films decreased. SEM images revealed that the thicknesses of the plate-like nanostructures decreased with increasing coumarin concentration. By UV/vis spectrophotometer analysis it is found that the coumarin concentration affects both the optical band gap and the transmission rate: both the band gap and spectral transmittance values of the films decreased for higher coumarin content. © 2013 Elsevier B.V. All rights reserved.Item Open Access Real-Time In Vivo Control of Neural Membrane Potential by Electro-Ionic Modulation(Elsevier, 2019) Soybas, Z.; Şimşek, S.; Erol, F. M. B.; Erdogan, U. Ç.; Şimşek, E. N.; Şahin, B.; Marçalı, M.; Aydogdu, B.; Elbüken, Çağlar; Melik, R.Theoretically, by controlling neural membrane potential (Vm) in vivo, motion, sensation, and behavior can be controlled. Until now, there was no available technique that can increase or decrease ion concentration in vivo in real time to change neural membrane potential. We introduce a method that we coin electro-ionic modulation (EIM), wherein ionic concentration around a nerve can be controlled in real time and in vivo. We used an interface to regulate the Ca2+ ion concentration around the sciatic nerve of a frog and thus achieved stimulation and blocking with higher resolution and lower current compared with electrical stimulation. As EIM achieves higher controllability of Vm, it has potential to replace conventional methods used for the treatment of neurological disorders and may bring a new perspective to neuromodulation techniques.