Kurum Yazarı "Öksüzoğlu, Ramis Mustafa" WoS İndeksli Yayınlar Koleksiyonu İçin Listeleme
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Bifunctional Fe-SBA-15-SO3H Mesoporous Catalysts with Different Si/Fe Molar Ratios: Synthesis, Characterization and Catalytic Activity
Erdem, Sezer; Erdem, Beyhan; Öksüzoğlu, Ramis Mustafa; Çıtak, Alime (Wiley-V C H Verlag GMBH, 2013)Bifunctional Fe-SBA-15-SO3H mesoporous materials with different Si/Fe molar ratios (3, 5, and 7) have been synthesized via a simple direct hydrothermal method and characterized by XRD, N-2-adsorption/desorption, TG/DTG and ... -
Catalytic Applications of Large Pore Sulfonic Acid-Functionalized SBA-15 Mesoporous Silica for Esterification
Erdem, Beyhan; Erdem, Sezer; Öksüzoğlu, Ramis Mustafa (De Gruyter Poland Sp Zoo, 2018)We report the preparation of pore expanded and sulfonic acid functionalized mesoporous silica catalysts by using different kinds of swelling agents such as 1,3,5-trimethyl benzene (TMB), n-decane (D), n-tridecane (TD), and ... -
Direct and Postsynthetic Functionalization of Mesoporous B-SBA-15-SO3H Acid Catalyst and Application to Methyl Propionate Esterification
Erdem, Beyhan; Azko, C.; Erdem, Sezer; Öksüzoğlu, Ramis Mustafa (Polish Acad Sciences Inst Physics, 2017)Organic functionality can be added to mesoporous silicates in two ways: either by covalent grafting (postsynthetic) of various functional groups onto the channel walls or by incorporating functionalities directly during ... -
Effect of bias voltage on tunneling mechanism in Co40Fe40B20/MgO/Co40Fe40B20 pseudo-spin valve
Yıldırım, Mustafa; Öksüzoğlu, Ramis Mustafa (Elsevier Science BV, 2015)Bias voltage dependence of tunneling mechanism has been systematically investigated in Co40Fe40B20 (2.1 nm)/MgO (2 nm)/Co40Fe40B20 (1.7 nm) pseudo-spin valve magnetic tunnel junction deposited using the combination of the ... -
Effect of calcination temperature on the structural and magnetic properties of Ni/SBA-15 nanocomposite
Erdem, Sezer; Erdem, Beyhan; Öksüzoğlu, Ramis Mustafa; Çıtak, Alime (Springer, 2015)The effect of calcination temperature on the structural and magnetic properties of Ni/SBA-15 nanocomposite prepared by reductant-impregnation method was studied using SBA-15 mesoporous silica as support. The structure, ... -
Effect of Thickness on the Structural, Microstructural, Electrical and Magnetic Properties of Ni Films Elaborated By Pulsed Electrodeposition on Si Substrate
Kacel, T.; Guittoum, A.; Hemmous, M.; Dirican, E.; Öksüzoğlu, Ramis Mustafa; Azizi, A.; Zergoug, M. (World Scientific Publ Co Pte LTD, 2018)We have studied the effect of thickness on the structural, microstructural, electrical and magnetic properties of Ni films electrodeposited onto n-Si (100) substrates. A series of Ni films have been prepared for different ... -
Excited state dynamics of nanocrystalline VO2 with white light continuum time resolved spectroscopy
Kurum, Ulaş; Yağlıoğlu, H. Gül; Küçüköz, Betül; Öksüzoğlu, Ramis Mustafa; Yıldırım, Mustafa; Yagci, A. Murat; Elmali, Ayhan (Elsevier Science BV, 2014)In an attempt to use ultrafast pump probe spectroscopy technique with white light continuum to reveal wavelength dependent dynamics of VO2, bandgap needs to be opened. Therefore, nanostructured amorphous and crystalline ... -
High-surface-area SBA-15-SO3H with enhanced catalytic activity by the addition of poly(ethylene glycol)
Erdem, Beyhan; Erdem, Sezer; Öksüzoğlu, Ramis Mustafa; Çıtak, Alime (Springer, 2013)The influence of poly(ethylene glycol) (PEG) and synthesis temperature in the synthesis of SBA-15-SO3H was investigated to evaluate the catalytic activity in the esterification of propionic acid with methanol. The catalysts ... -
Influence of Deposition Technique on Growth and Resistivity of Ta/NiFe Nano Films.
Capar, Ogeday; Yıldırım, Mustafa; Çınar, Hakan; Öksüzoğlu, Ramis Mustafa (Int Union Crystallography, 2009)… -
Magnetic Mesoporous Silica Nanocomposite for Biodiesel Production
Erdem, S.; Öksüzoğlu, Ramis Mustafa; Avşar, S. B.; Erdem, Beyhan (Polish Acad Sciences Inst Physics, 2017)Ordered mesoporous silicas can be utilized as support because of having large surface area, tunable porosity, uniform pore size distribution, high thermal stability and modifiable properties. However, these materials ... -
Magnetic Nano-Sized Solid Acid Catalyst Bearing Sulfonic Acid Groups for Biodiesel Synthesis
Erdem, Sezer; Erdem, Beyhan; Öksüzoğlu, Ramis Mustafa (De Gruyter Poland Sp Zoo, 2018)In our approach for magnetic iron oxide nanoparticles surface modification, the fabrication of an inorganic shell, consisting of silica by the deposition of preformed colloids onto the nanoparticle surface and functionalization ... -
Modifying ultrafast optical response of sputtered VOX nanostructures in a broad spectral range by altering post annealing atmosphere
Kurum, Ulaş; Yağlıoğlu, H. Gül; Küçüköz, Betül; Öksüzoğlu, Ramis Mustafa; Yıldırım, Mustafa; Yagci, A. M.; Elmali, Ayhan (IOP Publishing LTD, 2015)Nanostructured VOX thin films were grown in a dc magnetron sputter system under two different Ar:O-2 gas flow ratios. The films were annealed under vacuum and various ratios of O-2/N-2 atmospheres. The insulator-to-metal ... -
Preparation, Characterization and Catalytic Properties of SBA-15-SO3H Supported Tungstophosphoric Acid for Esterification Reaction
Erdem, Beyhan; Erdem, Sezer; Çıtak, Alime; Yavru, C.; Öksüzoğlu, Ramis Mustafa (Polish Acad Sciences Inst Physics, 2017)SBA-15-SO3H supported tungstophosphoric acid (TPA, H3PW12O40) mesoporous materials were synthesized by impregnation of TPA into the hydrothermally synthesized SBA-15-SO3H and the catalytic performances were compared for ... -
Structural and Electrical Properties of Specular Spin Valve with CuOx Spacer.
Yıldırım, Mustafa; Öksüzoğlu, Ramis Mustafa; Çınar, Hakan (Int Union Crystallography, 2009)… -
Surface and Interface Study of Vanadium Oxide Nano Films
Öksüzoğlu, Ramis Mustafa (Int Union Crystallography, 2009)… -
Synthesis, characterization and catalytic behavior of functionalized mesoporous SBA-15 with various organo-silanes
Çıtak, Alime; Erdem, Beyhan; Erdem, Sezer; Öksüzoğlu, Ramis Mustafa (Academic Press Inc Elsevier Science, 2012)Mesoporous silica SBA-15 has been synthesized and functionalized by one-step synthesis method to widen their various application possibilities. In this study, phenyltrimethoxysilane (PTMS), 3-mercapto-propyltrimethoxysilane ... -
Thickness Optimization of Underlayer and Seed Layer for Spin Valves.
Çınar, Hakan; Öksüzoğlu, Ramis Mustafa; Yıldırım, Mustafa (Int Union Crystallography, 2009)… -
The third order nonlinear optical characteristics of amorphous vanadium oxide thin film
Kurum, Ulaş; Öksüzoğlu, Ramis Mustafa; Yuksek, M.; Yağlıoğlu, H. G.; Çınar, H.; Elmali, Ayhan (Springer, 2011)We studied the nonlinear absorptive characteristics (saturation intensity threshold and effective nonlinear absorption coefficients) and nonlinear refraction in a 50-nm-thick VO (x) thin amorphous film prepared by pulsed ...