Yazar "Özden, Ayberk" için listeleme
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A comparative device performance assesment of CVD grown MoS2 and WS2 monolayers
Sar, Hüseyin; Özden, Ayberk; Yorulmaz, Büşra; Sevik, Cem; Perkgöz, Nihan Kosku; Ay, Feridun (Springer, 2018)In this study, optical and electronic transport properties of chemical vapor deposition (CVD) grown 2D WS2 and MoS2 based transistors and photodetectors are investigated and compared in ambient air by using 2D flakes grown ... -
CVD grown 2D MoS2 layers: A photoluminescence and fluorescence lifetime imaging study
Özden, Ayberk; Sar, Hüseyin; Yeltik, Aydan; Madenoğlu, Büşra; Sevik, Cem; Ay, Feridun; Perkgöz, Nihan Kosku (Wiley-V C H Verlag GMBH, 2016)In this letter, we report on the fluorescence lifetime imaging and accompanying photoluminescence properties of a chemical vapour deposition (CVD) grown atomically thin material, MoS2. mu-Raman, mu-photoluminescence (PL) ... -
CVD growth of monolayer MoS2: Role of growth zone configuration and precursors ratio
Özden, Ayberk; Ay, Feridun; Sevik, Cem; Perkgöz, Nihan Kosku (IOP Publishing LTD, 2017)Single-layer, large-scale two-dimensional material growth is still a challenge for their wide-range usage. Therefore, we carried out a comprehensive study of monolayer MoS2 growth by CVD investigating the influence of ... -
Determination of Dynamically Stable Electrenes toward Ultrafast Charging Battery Applications
Kocabaş, Tugbey; Özden, Ayberk; Demiroğlu, İlker; Çakır, Deniz; Sevik, Cem (American Chemical Society, 2018)Electrenes, an atomically thin form of layered electrides, are very recent members of the 2D materials family. In this work, we employed first principle calculations to determine stable, exfoliatable, and application-promising ... -
Extensive mode mapping and novel polarization filter design for ALD grown Al2O3 ridge waveguides
Demirtaş, Mustafa; Özden, Ayberk; Acikbas, Ethem; Ay, Feridun (Springer, 2016)In this work we report on realistic simulations aiming at extending our design knowledge on the fabrication and optimization of highly efficient integrated optical waveguide amplifiers. We focus specifically on atomic layer ... -
Near-Unity Efficiency Energy Transfer from Colloidal Semiconductor Quantum Wells of CdSe/CdS Nanoplatelets to a Monolayer of MoS2
Taghipour, Nima; Martinez, Pedro Ludwig Hernandez; Özden, Ayberk; Olutas, Murat; Dede, Didem; Güngör, Kıvanç; Demir, Hilmi Volkan (American Chemical Society, 2018)A hybrid structure of the quasi-2D colloidal semiconductor quantum wells assembled with a single layer of 2D transition metal dichalcogenides offers the possibility of highly strong dipole-to-dipole coupling, which may ... -
Polarization insensitive single mode Al2O3 rib waveguide design for applications in active and passive optical waveguides
Özden, Ayberk; Demirtaş, M.; Ay, Feridun (Springeropen, 2015)Both passive and active, single mode, wavelength and polarization insensitive design of Al2O3 rib waveguides on SiO2 substrate is reported. Influence of the waveguide height, etch depth, waveguide width and operation ... -
Thermal conductivity engineering of bulk and one-dimensional Si-Ge nanoarchitectures
Kandemir, Ali; Özden, Ayberk; Çağın, Tahir; Sevik, Cem (Taylor & Francis LTD, 2017)Various theoretical and experimental methods are utilized to investigate the thermal conductivity of nanostructured materials; this is a critical parameter to increase performance of thermoelectric devices. Among these ... -
Thermal Conductivity Suppression in Nanostructured Silicon and Germanium Nanowires
Özden, Ayberk; Kandemir, Ali; Ay, Feridun; Perkgöz, Nihan Kosku; Sevik, Cem (Springer, 2016)The inherent low lattice thermal conductivity (TC) of semiconductor nanowires (s-NW) due to one-dimensional phonon confinement might provide a solution for the long-lasting figure-of-merit problem for highly efficient ... -
Vibrational and mechanical properties of single layer MXene structures: a first-principles investigation
Yorulmaz, Uğur; Özden, Ayberk; Perkgöz, Nihan Kosku; Ay, Feridun; Sevik, Cem (IOP Publishing LTD, 2016)MXenes, carbides, nitrides and carbonitrides of early transition metals are the new members of two dimensional materials family given with a formula of Mn+1 X-n. Recent advances in chemical exfoliation and CVD growth of ...
