Test and Measurement Center In advanced Technologies (MERKEZ LABORATUVARI)

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Recent Submissions

Compositional analysis of (p) a-SiCx:H emitter layers for enhanced short-circuit current density in SHJ solar cells Salimi, Arghavan; Sedani, Salar H.; Ghasemi, Milad; Ünver, Seda Kılıçkaya; Dönerçark, Ergi; Koç, Mehmet; Yıldız, İlker; Depauw, Valerie; Radhakrishnan, Hariharsudan Sivaramakrishnan; Nasser, Hisham; Turan, Raşit (2026-11-01) One of the loss mechanisms in silicon heterojunction (SHJ) solar cells is the parasitic absorption in the p-type emitter layer. In order to increase the device performance, parasitic absorption losses should be decreased b...
Green-Synthesized Bi-Doped PEI N-GQDs Enabling Long-Term Stable Silicon Heterojunction Photodetectors Berktas, Zeynep; Kumar, Arun; Sedani, Salar H.; YILDIZ, MUSTAFA; Yıldız, İlker; Di Bartolomeo, Antonio; ORHAN, ELİF (2026-08-04) In this study, BiNPs&PEI N-GQDs nanocomposites were synthesized via a green approach by incorporating bismuth nanoparticles (BiNPs) into polyethyleneimine-functionalized nitrogen-doped graphene quantum dots (PEI N-GQDs). T...
A-Site Engineered High Entropy Perovskite Oxides for Rechargeable Zinc-Air Batteries Ozgur, Cagla; Erdil, Tuncay; Geyikci, Uygar; Cihan, Huseyin Inan; Yıldız, İlker; Toparlı, Çiğdem (2026-06-01) High-entropy perovskite oxides (HEPOs) combine the compositional flexibility of perovskite oxides with the structural stability of high-entropy oxides, which enables tunable physicochemical properties and robust electronic...
Continuous and reversible electrical-tuning of fluorescent decay rate via Fano resonance Polat, Emre Ozan; Artvin, Zafer; Şaki, Yusuf; Bek, Alpan; Sahin, Ramazan (2026-04-01) We demonstrate electrically tunable control of the radiative and nonradiative decay rates of a fluorescent molecule through a Fano-resonant transparency embedded in the plasmonic local density of optical states (LDOSs). An...
Electrical Properties of ZnO Nanoparticle-Embedded/Polyethylenimine-Functionalized Nitrogen-Doped Graphene Quantum Dot Nanocomposites Yıldız, İlker (2026-03-10) In this work, a sustainable solution-based route was employed to synthesize a ZnONPs/PEI N-GQDs nanocomposite by integrating zinc oxide nanoparticles into polyethylenimine-functionalized nitrogen-doped graphene quantum dot...
Iron impurities drive Zn-rich phase formation in CdZnTe crystals Yıldız, İlker (2025-09-01)
Calcination effects on meta-forms of kaolin and halloysite: Role of Al-Si spinel crystallization in zeolite synthesis Paşabeyoğlu, Pelin; Akata Kurç, Burcu (2025-06-01) The role of Al-Si spinel crystallization during high-temperature calcination of kaolin and halloysite was investigated to optimize the direct synthesis of zeolites 4A and 13X without additional silica or structure-directin...
Middle-to-Late Eocene shoshonitic basaltic volcanism in NW Iran (Kivi region): implications for a buried Neo-Tethyan suture Mohamadi chaghamarani, Zeinab; Amel, Nasir; Topuz, Gültekin; Moayyed, Mohsen; Koroneos, Antonios; Köksal, Serhat; Küçük, Aynur (2025-01-01) In Iran, Eocene igneous rocks form two main magmatic belts: the Azerbaijan-Alborz and Urumieh-Dokhtar. This paper examines the petrogenesis of Middle–Late Eocene andesitic to basaltic rocks and dykes (microgabbro, dolerite...
Synthesıs, Bıologıcal Actıvıty, Molecular Dockıng And Adme Studıes Of Novel Benzımıdazole Derıvatıves Carryıng Methyl Sulfonyl Group As Bcl-2 Inhıbıtors gado, sarah; Baylava, Ayşenur; Parıltı, Damla Nur; ALAGÖZ, ZEYNEP; MUTLU, PELİN; Doğan, Tuğba (2024-10-21)
Novel retinoid-benzimidazole derivatives:Synthesis, anticancer activity, molecular docking and in silico ADME studies CANSARAN DUMAN, DEMET; ALAGÖZ, ZEYNEP; ALKAN, AYŞE HALE; BOZKURT, FATMA ZEYNEP; Doğan, Tuğba; MUTLU, PELİN (2024-10-13)
Solar-driven calcination of clays for sustainable zeolite production: CO2 capture performance at ambient conditions Paşabeyoğlu, Pelin; Deniz, Erdem; Moumin, Gkiokchan; Say, Zafer; Akata, Burcu (2024-10-01) This study presents the environmentally sustainable synthesis of zeolites from solar-calcined kaolin and halloysite, emphasizing their application in CO2 capture due to their distinctive porous structures and chemica...
Role of pyrite on oxidative degradation of some chlorophenolic compounds with zero- valent iron/H2O2 system KANTAR, ÇETİN; ORAL, ÖZLEM; Yıldız, İlker (2024-05-19)
Sentetik Hidrojeller Endoğan Tanır, Tuğba (ODTÜ Yayıncılık, 2023-12-01)
Synthesis and characterization of b-site controlled la-based high entropy perovskite oxides Yıldız, İlker (2023-12-01) High entropy perovskite oxide materials are a highly promising class of materials with a wide range of potential applications. They offer a unique combination of perovskite oxides and high entropy oxides, making them suita...
Thermoluminescence and optically stimulated luminescence properties of NaMgF3:Dy,Eu synthesized by hydrothermal method and DFT calculations for the bandgap Guckan, V.; Bokhari, S.W.; Altunal, Volkan; Varan, Nazlı Ece; Kurt, K.; Yıldız, İlker; Gao, W.; Yegingil, Z. (2023-11-01) This study indicates Thermoluminescence (TL) and Optically Stimulated Luminescence (OSL) radiation dosimetry characteristics for NaMgF3:Dy1%,Eu0.1% fluoroperovskite. Nanocrystalline NaMgF3:Dy1%,Eu0.1% material was synthesi...
A Standard Method Verification for Determination of Sugar Content of Commercial Fruit Juices by HPLC Doğan, Tuğba; Şeker, Tamay (2023-07-01) This study aimed to verify the standard test method TS EN 12630 and determine the sugar contents of commercially available fruit juices by high pressure liquid chromatography. A laboratory should verify the standard test m...
The Effects of “Transition to Professional Life’’ Course on Career Decision-Making Self-Efficacy Ünder, Ümran ; Çavuş, Mustafa ; Akyıldız Munusturlar, Müge ; Akdoğan, Emre ; Görkem, Sultan Funda ; Tuna Öztürk, Eda; Balkan, Sevgin Aysu ; Banar, Müfide (2023-06-01) Üniversite son sınıf öğrencilerinin kariyer gelişimleri için gerekli yetkinliklerin kazandırılması ve var olan yetkinliklerinin geliştirilmesi amacıyla tasarlanan ESTÜ401 Profesyonel Hayata Geçiş (1+1; 2 ECTS) dersinin, öğ...
Yükselmiş Kıyı Çökellerinde Karadeniz’in Geç Pleyistosen-Holosen Özellikleri Erturaç, Mehmet Korhan; Şahiner, Eren; Kandemir, Raif; Sağlam Selçuk, Azad; Çelen, Meltem; Okur, Hilal; Dikbaş, Aynur; Hasözbek, Altuğ; Barredo, Fernando Jiménez; Köksal, Serhat; Süer, Selin; Kazancı, Nizamettin (2023-04-10) ÖzDünya’nın önemli iç denizlerinden olan Karadeniz’in buzul vebuzullararası dönemlerde Akdeniz, Marmara ve Hazar Denizi ilebağlantıları oldukça karmaşıktır. Karadeniz’in Geç Pleyistosen-Holosen zaman aralığındaki yüksek se...
Radyojenik İzotop Jeokimyasının Arkeolojide Uygulanması: Faydaları ve Handikapları Köksal, Serhat; Pişkin, Evangelia; Durdu, Gamze; Süer, Selin; Küçük, Aynur (2023-04-10) ÖzYerbilimleri ve diğer birçok disiplin gibi arkeoloji alanında daradyojenik izotop jeokimyasından yararlanılmaktadır. Radyojenikizotop jeokimyası verileri, eski uygarlıkların yaşam şekilleri vekoşulları ile farklı bölgele...
Coffee-Derived Exosome-Like Nanoparticles: Are They the Secret Heroes? Kantarcıoğlu, Murat; Yıldırım, Gülşen; Akpınar Oktar, Pınar; Yanbakan, Serpil; Özer, Zeynep Büşra; Yurtsever Sarıca, Deniz; Taşdelen, Serpil; Bayrak, Emel; Akın Balı, Dilara Fatma; Öztürk, Seçkin; Akçalı, Kamil Can; Ezer, Üstün; Kürekçi, Ahmet Emin (2023-02-01) BACKGROUND: Regular coffee consumption has beneficial and preventative effects on liver and chronic neurodegenerative diseases. However, the studies performed with the ingredients found in coffee beverages have not clarifi...

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