Papers

PUBLISHED IN REFEREED JOURNALS

107) Asli Celebioglu, Kugalur Shanmugam Ranjith, Hamit Eren, Necmi Biyikli, and Tamer Uyar, “Surface Decoration of Pt Nanoparticles via ALD with TiO2 Protective Layer on Polymeric Nanofibers as Flexible and Reusable Heterogeneous Nanocatalysts”, Scientific Reports, 7, 13401 (2017).

106) (Inside Front Cover Article) Kugalur Shanmugam Ranjith, Asli Celebioglu, Hamit Eren, Necmi Biyikli, Tamer Uyar, “Monodispersed, Highly Interactive Facet (111) Oriented Pd Nanograins by ALD onto Free-standing and Flexible Electrospun Polymeric Nanofibrous Webs for Catalytic Application”, Advanced Materials Interfaces, DOI: 10.1002/admi.201700640 (2017).

105) Osman Arslan, Hamit Eren, Necmi Biyikli, and Tamer Uyar, “Reusable and Flexible Heterogeneous Catalyst for Reduction of TNT by Pd Nanocube Decorated ZnO Nanolayers onto Electrospun Polymeric Nanofibers”, ChemistrySelect, 2, 8790 (2017).

104) (Invited Topical Review) Necmi Biyikli and Ali Haider, “Atomic Layer Deposition: An Enabling Technology for the Growth of Functional Nanoscale Semiconductors”, Semiconductor Science and Technology, 32, 093002 (2017).

103) Zurab Kushitashvili, Amiran Bibilashvili, and Necmi Biyikli, “Properties of Hafnium Oxide Received by Ultra Violet Stimulated Plasma Anodizing”, IEEE Transactions on Device and Materials Reliability, DOI: 10.1109/TDMR.2017.2751078 (2017).

102) Osman Arslan, Fuat Topuz, Hamit Eren, Necmi Biyikli, and Tamer Uyar, “Pd Nanocube Decoration onto Flexible Nanofibrous Mats of Core-Shell Polymer-ZnO Nanofibers for Visible Light Photocatalysis” New Journal of Chemistry, 41, 4145 (2017).

101) Turkan Bayrak, Seda Kizir, Enver Kahveci, Necmi Biyikli, and Eda Goldenberg, “Postdeposition annealing on RF-sputtered SrTiO3 thin films”, Journal of Vacuum Science and Technology (A), 35, 021505 (2017).

100) Ali Kemal Okyay, Oguz Hanoglu, Mustafa Yuksel, Handan Acar, Selim Sulek, Burak Tekcan, Sedat Agan, Necmi Biyikli, and Mustafa O. Guler, “Using nanogap in label-free impedance based electrical biosensors to overcome electrical double layer effect”, Microsystem Technologies, 23, 889 (2017).

99) Kazim Gorgulu, Abdullah Gok, Mehmet Yilmaz, Kagan Topalli, Necmi Biyikli, and Ali. K. Okyay, “All-Silicon Ultra-Broadband Infrared Light Absorbers”, Scientific Reports, 6, 38589 (2016).

98) Ali Haider, Petro Deminskyi, Talha M. Khan, Hamit Eren, and Necmi Biyikli, ”Area-Selective Atomic Layer Deposition Using Inductively Coupled Plasma Polymerized Fluorocarbon Layer – A Case Study for Metal-Oxides”, The Journal of Physical Chemistry (C), 120, 26393 (2016).

97) Ali Haider, Mehmet Yilmaz, Petro Deminskyi, Hamit Eren, Talha M. Khan, and Necmi Biyikli, ”Nanoscale Selective Area Atomic Layer Deposition of TiO2 using E-beam Patterned Polymers”, RSC Advances, 6, 106109  (2016).

96) Mohammad Aref Khalily, Hamit Eren, Serdar Akbayrak, Hepi Hari Susapto, Necmi Biyikli, Saim Ozkar, and Mustafa O. Guler, “Facile Synthesis of Three-Dimensional Pt-TiO2 Nanonetworks: Highly Active Catalyst for Hydrolytic Dehydrogenation of Ammonia Borane”, Angewandte Chemie, 55, 12257 (2016).

95) Ruslan Garifullin, Hamit Eren, Gamze T. Ulusoy, Necmi Biyikli, Ali K. Okyay, and Mustafa O. Guler, “Self-Assembled Peptide Nanofiber Templated ALD Growth of TiO2 and ZnO Semiconductor Nanonetworks”, Physica Status Solidi A: Applications and Materials Science, 213, 3238 (2016).

94) Halit Altuntas, Turkan Bayrak, Seda Kizir, Ali Haider, and Necmi Biyikli, “Electrical conduction and dielectric relaxation properties of AlN thin films grown by hollow-cathode plasma-assisted atomic layer deposition”, Semiconductor Science and Technology, 31, 075003 (2016).

93) Sevde Altuntas, Fatih Buyukserin, Ali Haider, Buket Altinok, Necmi Biyikli, Belma Aslim, “Protein-releasing conductive anodized alumina membranes for nerve-interface materials”, Materials Science and Engineering C, 67, 590 (2016).

92) Seda Kizir, Ali Haider, and Necmi Biyikli, “Substrate impact on the low-temperature growth of GaN thin films by plasma-assisted atomic layer deposition”, Journal of Vacuum Science and Technology (A), 34, 041511 (2016).

91) Ali Haider, Seda Kizir, and Necmi Biyikli, “Low-temperature self-limiting atomic layer deposition of wurtzite InN on Si(100)”, AIP Advances, 6, 045203 (2016).

90) Murat Serhatlioglu, Senver Ayas, Necmi Biyikli, Aykutlu Dana, and Mehmet E. Solmaz, “Perfectly absorbing ultra thin interference coatings for hydrogen sensing”, Optics Letters, 41, 1724 (2016).

89) Abdullah Gok, Mehmet Yilmaz, Necmi Biyikli, Kagan Topalli, and Ali K. Okyay, “Practical Multi-Featured Perfect Absorber Utilizing High Conductivity Silicon”, Journal of Optics, 18, 035002 (2016).

88) Mustafa Alevli, Nese Gungor, Ali Haider, Seda Kizir, and Necmi Biyikli, “Comparison of trimethylgallium and triethylgallium as “Ga” source materials for the growth of ultra-thin GaN films on Si(100) substrates via hollow-cathode plasma-assisted atomic layer deposition”, Journal of Vacuum Science and Technology (A), 34, 01A137 (2016).

87) Mustafa Alevli, Nese Gungor, Ali Haider, Seda Kizir, and Necmi Biyikli, “Substrate temperature influence on the properties of GaN thin films grown by hollow-cathode plasma-assisted atomic layer deposition”, Journal of Vacuum Science and Technology (A), 34, 01A125 (2016).

86) Ali Haider, Seda Kizir, Cagla Ozgit-Akgun, Ali Kemal Okyay, and Necmi Biyikli, “Low-temperature sequential pulsed chemical vapor deposition of ternary BxGa1-xN and BxIn1-xN thin film alloys”, Journal of Vacuum Science and Technology (A), 34, 01A123 (2016).

85) Sesha Vempati, Fatma Kayaci-Senirmak, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar, “Surface ionic states and structure of titanate nanotubes”, RSC Advances, 5, 82977 (2015).

84) Sesha Vempati, Fatma Kayaci-Senirmak, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar, “Amorphous to tetragonal zirconia nanostructures and evolution of valance and core regions”, The Journal of Physical Chemistry C, 119, 23268 (2015).

83) Ali Haider, Seda Kizir, Cagla Ozgit-Akgun, Eda Goldenberg, Shahid Ali Leghari, Ali Kemal Okyay, and Necmi Biyikli, “Low-temperature grown wurtzite InxGa1-xN thin films via hollow cathode plasma-assisted atomic layer deposition”, Journal of Materials Chemistry (C), 3, 9620 (2015).

82) Halit Altuntas, Cagla Ozgit-Akgun, Inci Donmez, and Necmi Biyikli, “Effect of film thickness on the electrical properties of AlN films prepared by plasma-enhanced atomic layer deposition”, IEEE Transactions on Electron Devices, 62, 3627 (2015).

81) Eda Cetinorgu-Goldenberg, Turkan Bayrak, Cagla Ozgit-Akgun, Ali Haider, Shahid A. Leghari, Manoj Kumar, and Necmi  Biyikli, “Effect of O2/Ar Flow Ratio and Post-deposition Annealing on the Structural, Optical and Electrical Characteristics of SrTiO3 Thin Films Deposited by RF Sputtering at Room Temperature”, Thin Solid Films, 590, 193 (2015).

80) A. Turut, A. Karabulut, K. Ejderha, and N. Biyikli, “Capacitance-conductance-current-voltage characteristics of atomic layer deposited Au/Ti/Al2O3/n-GaAs MIS Structures”, Materials Science in Semiconductor Processing, 39, 400 (2015).

79) Fatma Kayaci, Sesha Vempati, Cagla Ozgit-Akgun, Inci Donmez, Necmi Biyikli, and Tamer Uyar,  “Transformation of polymer-ZnO core-shell nanofibers into ZnO hollow nanofibers: Intrinsic defect reorganization in ZnO and its influence on the photocatalysis”, Applied Catalysis B: Environmental, 176-177, 646 (2015).

78) Cagla Ozgit-Akgun, Fatma Kayaci, Sesha Vempati, Ali Haider, Asli Celebioglu, Eda Goldenberg, Seda Kizir, Tamer Uyar, and Necmi Biyikli, “Fabrication of flexible polymer-GaN core-shell nanofibers by the combination of electrospinning and hollow cathode plasma-assisted atomic layer deposition”, Journal of Materials Chemistry (C), 3, 5199 (2015).

77) Halit Altuntas, Cagla Ozgit-Akgun, Inci Donmez, and Necmi Biyikli, “Current transport mechanisms in plasma-enhanced atomic layer deposited AlN thin films”, Journal of Applied Physics, 117, 155101 (2015).

76) Mustafa Alevli, Cagla Ozgit-Akgun, Inci Donmez, Ali K. Okyay, Necmi Biyikli, Sampath Gamage, Indika Senevirathna, and Nikolaus Dietz, “Effect of reactor pressure on optical and electrical properties of InN films grown by high-pressure chemical vapor deposition” Physica Status Solidi (C), 12, 423 (2015).

75) A. Turut, A. Karabulut, K. Ejderha, and N. Biyikli, “Capacitance-conductance characteristics of Au/Ti/Al2O3/n-GaAs structures with very thin Al2O3 interfacial layer”, Materials Research Express, 2, 046301 (2015).

74) Cagla Ozgit-Akgun, Eda Goldenberg, Sami Bolat, Burak Tekcan, Fatma Kayaci, Tamer Uyar, Ali Kemal Okyay, and Necmi Biyikli, “Low-temperature hollow cathode plasma-assisted atomic layer deposition of crystalline III-nitride thin films and nanostructures”, Physica Status Solidi (C), 12, 394 (2015).

73) S. Bolat, C. Ozgit-Akgun, B. Tekcan, N. Biyikli, and A. K. Okyay, “Electronic and Optical Device Applications of Hollow Cathode Plasma Assisted Atomic Layer Deposition Based GaN Thin Films”, Journal of Vacuum Science and Technology (A), 33, 01A143 (2015).

72) Ali Haider, Hilal Cansizoglu, Mehmet Fatih Cansizoglu, Tansel Karabacak, Ali Kemal Okyay, and Necmi Biyikli, “Enhanced Photoresponse of Conformal TiO2/Ag Nanorod Array-based Schottky Photodiodes Fabricated via Successive Glancing Angle and Atomic Layer Deposition”, Journal of Vacuum Science and Technology (A), 33, 01A110 (2015).

71) Feyza B. Oruc, Levent E. Aygun, Inci Donmez, Hyun Yong Yu, Necmi Biyikli, and Ali K. Okyay, “Low Temperature Atomic Layer Deposited ZnO Photo Thin Film Transistors”, Journal of Vacuum Science and Technology (A), 33, 01A105 (2015).

70) Asli Celebioglu, Sesha Vempati, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar, “Water-soluble non-polymeric electrospun cyclodextrin nanofiber template for the synthesis of metal oxide tubes by atomic layer deposition”, RSC Advances, 4, 61698 (2014).

69) Burak Tekcan, Cagla Ozgit-Akgun, Sami Bolat, Necmi Biyikli, Ali K. Okyay, “Metal-semiconductor-metal ultraviolet photodetectors based on gallium nitride grown by atomic layer deposition at low temperatures”, SPIE Optical Engineering, 53, 107106 (2014).

68) Necmi Biyikli, Abdulkerim Karabulut, Hasan Efeoglu, Betul Guzeldir, and Abdulmecit Turut, “Electrical characteristics of Au/Ti/n-GaAs contacts over a wide measurement temperature range”, Physica Scripta, 89, 095804 (2014).

67) Ali Haider, Cagla Ozgit-Akgun, Fatma Kayaci, Ali K. Okyay, Tamer Uyar, and Necmi Biyikli, “Fabrication of BN/AlN bishell hollow nanofibers by electrospinning and atomic layer deposition”, APL Materials, 2, 096109 (2014).

66) Sabri Alkis, Burak Tekcan, Mustafa Alevli, Nikolaus Dietz, Bulend Ortac, Necmi Biyikli, and Ali K. Okyay, “A near-infrared range photodetector based on indium nitride nanocrystals obtained through laser ablation”, IEEE Electron Device Letters, 35, 936 (2014).

65) Ali Haider, Cagla Ozgit-Akgun, Eda Goldenberg, Ali K. Okyay, and Necmi Biyikli, “Low-Temperature Deposition of Hexagonal Boron Nitride Via Sequential Injection of Triethylboron and N2/H2 Plasma”, Journal of the American Ceramic Society, 97, 4052 (2014).

64) S. Bolat, C. Ozgit-Akgun, B. Tekcan, N. Biyikli, and A. K. Okyay, “Low temperature thin film transistors with hollow cathode plasma-assisted atomic layer deposition based GaN channels”, Applied Physics Letters, 104, 243505 (2014).

63) Fatma Kayaci, Sesha Vempati, Inci Donmez, Necmi Biyikli, and Tamer Uyar, “Role of zinc interstitials and oxygen vacancies of ZnO in photocatalysis: A bottom-up approach to control the defect density”, Nanoscale, 6, 10224 (2014).

62) Halit Altuntas, Inci Donmez, Cagla Ozgit-Akgun, and Necmi Biyikli, “Effect of post-deposition annealing on the electrical properties of β-Ga2O3 thin films grown on p-Si by plasma-enhanced atomic layer deposition”, Journal of Vacuum Science and Technology (A), 32, 041504 (2014).

61) H. Mopidevi, H. V. Hunerli, E. Cagatay, N. Biyikli, M. Imbert, J. Romeu, L. Jofre, and Bedri A. Cetiner, “Three-dimensional microfabricated broadband patch antenna for WiGig applications”, IEEE Antennas and Wireless Propagation Letters, 13, 828 (2014).

60) (Front Cover Article) Fatma Kayaci, Sesha Vempati, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar, “Selective isolation of the electron or hole in photocatalysis: ZnO–TiO2 and TiO2–ZnO core-shell structured heterojunction nanofibres via electrospinning and atomic layer deposition”, Nanoscale, 6, 5735 (2014).

59) Eda Goldenberg, Cagla Ozgit-Akgun, Ali Kemal Okyay, and Necmi Biyikli, “Optical characteristics of nanocrystalline AlxGa1-xN thin films deposited by hollow cathode plasma-assisted atomic layer deposition” Journal of Vacuum Science and Technology (A), 32, 031508 (2014).

58) Fatma Kayaci, Sesha Vempati, Cagla Ozgit-Akgun, Necmi Biyikli, and Tamer Uyar, “Enhanced Photocatalytic Activity of Homoassembled ZnO Nanostructures on Electrospun Polymeric Nanofibres: A Combination of Atomic Layer Deposition and Hydrothermal Growth”, Applied Catalysis B: Environmental, 156-157, 173 (2014).

57) (Front Cover Article) Cagla Ozgit-Akgun, Eda Goldenberg, Ali Kemal Okyay, and Necmi Biyikli, “Hollow cathode plasma-assisted atomic layer deposition of crystalline AlN, GaN and AlxGa1-xN thin films at low temperature”, Journal of Materials Chemistry (C), 2, 2123 (2014).

56) A. Ghobadi, K. Topalli, N. Biyikli, and A.K. Okyay, “Complementary Spiral Resonators For Ultrawideband Suppression Of Simultaneous Switching Noise In High-Speed Circuits”, Progress in Electromagnetics Research Society, 46, 117 (2014).

55) Halit Altuntas, Inci Donmez, Cagla Ozgit-Akgun, and Necmi Biyikli, “Electrical characteristics of β-Ga2O3 thin films grown by plasma enhanced atomic layer deposition”, Journal of Alloys and Compounds, 593, 190 (2014).

54) B. Sahin, F. Bayansal, M. Yuksel, N. Biyikli, and H. A. Cetinkara, “Effect of coumarin concentration on the physical properties of CdO nanostructures”, Ceramics International, 40, 5237 (2014).

53) H. Ceylan, C. Ozgit-Akgun, T. S. Erkal, I. Donmez, R. Garifullin, A. B. Tekinay, H. Usta, N. Biyikli, and M. O. Guler, “Size-controlled conformal nanofabrication of biotemplated three-dimensional TiO2 and ZnO nanonetworks”, Scientific Reports, 3, 2306 (2013).

52) H. Karaagac, M. Parlak, L.E. Aygun, M. Ghaffari, N. Biyikli, A.K. Okyay, “A baseball-bat-like CdTe/TiO2 nanorods-based heterojunction core–shell solar cell”, Scripta Materialia, 69, 323 (2013).

51) F. Bayansal, B. Şahin, M. Yüksel, N. Biyikli, H.A. Çetinkara, H.S. Güder, “Influence of coumarin as an additive on CuO nanostructures prepared by successive ionic layer adsorption and reaction (SILAR) method”, Journal of Alloys and Compounds566, 78 (2013).

50) Fatma KayaciCagla Ozgit-AkgunNecmi Biyikli, and  Tamer Uyar, “Surface-decorated ZnO nanoparticles and ZnO nanocoating on electrospun polymeric nanofibers by atomic layer deposition for flexible photocatalytic nanofibrous membranes”, RSC Advances, 3, 6817 (2013).

49) I. Donmez, F. Kayaci, C. Ozgit-Akgun, T. Uyar, and N. Biyikli, “Fabrication of hafnia (HfO2) hollow nanofibers by atomic layer deposition using electrospun nanofiber templates”, Journal of Alloys and Compounds, 559, 146 (2013).

48) I. Donmez, C. Ozgit-Akgun, and N. Biyikli, “Low temperature deposition of Ga2O3 thin films using trimethylgallium and oxygen plasma”, Journal of Vacuum Science and Technology (A), 31, 01A110 (2013).

47) C. Ozgit, F. Kayaci, I. Donmez, T. Uyar, and N. Biyikli, “Template-based synthesis of aluminum nitride hollow nanofibers via plasma-enhanced atomic layer deposition”, Journal of the American Ceramics Society, 96, 916 (2013).

46) F. Kayaci, C. Ozgit-Akgun, I. Donmez, N. Biyikli, and T. Uyar “Polymer-Inorganic Core-Shell Nanofibers by Electrospinning and Atomic Layer Deposition: Flexible Nylon-ZnO Core-Shell Nanofiber Mats and Their Photocatalytic Activity”, ACS Applied Materials & Interfaces, 4, 6185 (2012).

45) N. Biyikli, C. Ozgit, and I. Donmez, “Low-temperature self-limiting growth of III-Nitride thin films by plasma-enhanced atomic layer deposition”, Nanoscience and Nanotechnology Letters, 4, 1008 (2012).

44) H. Karaagac, Levent Erdal Aygun, Mehmet Parlak, Mohammad Ghaffari, N. Biyikli, and A. K. Okyay, “Au/TiO2 nanorods based Schottky type UV photodetectors”, Physica Status Solidi – Rapid Research Letters, 6, 442 (2012).

43) M. Alevli, C. Ozgit, I. Donmez, and N. Biyikli, “Optical properties of AlN thin films grown by plasma enhanced atomic layer deposition”, Journal of Vacuum Science and Technology (A), 30, 021506 (2012).

42) C. Ozgit, I. Donmez, M. Alevli, and N. Biyikli, “Atomic layer deposition of GaN at low temperatures”, Journal of Vacuum Science and Technology (A), 30, 01A124 (2012).

41) M. Alevli, C. Ozgit, I. Donmez, and N. Biyikli, “Structural Properties of AlN Films Deposited by Atomic Layer Deposition at different growth temperatures”, Physica Status Solidi (A), 209, 266 (2012).

40) C. Ozgit, I. Donmez, M. Alevli, and N. Biyikli, “Self-limiting low-temperature growth of crystalline AlN thin films by plasma-enhanced atomic layer deposition”, Thin Solid Films, 520, 2750 (2012).

39) C. Ozgit, I. Donmez, and N. Biyikli, “Self-limiting growth of GaN at low temperatures”, Acta Physica Polonica (A), 120, A55 (2011).

38) M. Alevli, C. Ozgit, I. Donmez, and N. Biyikli, “The Influence of N2/H2 and Ammonia N Source Materials on Optical and Structural Properties of AlN Films Grown by Plasma Enhanced Atomic Layer Deposition”, Journal of Crystal Growth, 335, 51 (2011).

37) Bedri A. Cetiner, Gemma Roqueta, Luis Jofre, and Necmi Biyikli, “RF MEMS Integrated Frequency Reconfigurable Annular Slot Antenna”, IEEE Transactions on Antenna and Propagation, 58, 626 (2010).

36) B. A. Cetiner, N. Biyikli, B. Yildirim, and Y. Damgaci, “Nanoelectromechanical Switches for Reconfigurable Antennas”, Microwave and Optical Technologies Letters, 52, 64 (2010).

35) N. Biyikli, Y. Damgaci, and B. A Cetiner, “Low-voltage small-size double-arm MEMS actuator” Electronics Letters, 45, 354 (2009).

34) H. Cheng, N. Biyikli, J. Xie, C. Kurdak, and H. Morkoc, “Energy relaxation probed by weak antilocalization measurements in GaN heterostructures”, Journal of Applied Physics, 106, 103702 (2009).

33) H. Cheng, N. Biyikli, U. Ozgur, C. Kurdak, H. Morkoc, and V. I. Litvinov, “Measurement of linear and cubic spin-orbit coupling parameters in AlGaN/AlN/GaN heterostructures with a polarization-induced two-dimensional electron gas”, Physica E-Low Dimensional Systems & Nanostructures, 40, 1586 (2008).

32) Mutlu Gokkavas, Serkan Butun, Turgut Tut, Necmi Biyikli, and Ekmel Ozbay, “AlGaN-based high-performance metal-semiconductor-metal photodetectors”, Photonics and Nanostructures – Fundamentals and Applications, 5, 53 (2007).

31) P. R. Ohodnicki, K. Y. Goh, Y. Hanlumyuang, K. Ramos, M. E. McHenry, Z. Cai, K. Ziemer, H. Morkoc, Necmi Biyikli, Z. Chen, C. Vittoria, and V. G. Harris, “Magnetic anisotropy and crystalline texture in BaO(Fe2O3)6 thin films deposited on GaN/Al2O3”, Journal of Applied Physics, 101, 09M521 (2007).

30) Necmi Biyikli, H. Cheng, Ç. Kurdak, X. Ni, Y. Fu, J. Xie, I. Vurgaftman, J. Meyer, and H. Morkoç, “Magneto-transport properties of MOVPE-grown AlxGa1-xN/AlN/GaN heterostructures with high-mobility two-dimensional electron gas”, Journal of Applied Physics, 101, 113710 (2007).

29) X. Ni, U. Ozgur, Y. Fu, Necmi Biyikli, J. Xie, A. A. Baski, H. Morkoc, and Z. Liliental-Weber, “Defect reduction in (11-20) a-plane GaN by two-stage epitaxial lateral overgrowth”, Applied Physics Letters, 89, 262105 (2006).

28) Necmi Biyikli, Ç. Kurdak, Ü. Özgür, X. Ni, Y. Fu, and H. Morkoç, “Illumination and annealing characteristics of two-dimensional electron gas systems in metal-organic vapor-phase epitaxy grown AlxGa1–xN/AlN/GaN heterostructures”, Journal of Applied Physics, 100, 103702 (2006).

27) Ç. Kurdak, Necmi Biyikli, Ü. Özgür, H. Morkoç, and V. I. Litvinov, “Weak antilocalization and zero-field electron spin splitting in AlGaN/AlN/GaN heterostructures with a polarization-induced two-dimensional electron gas”, Physcial Review B, 74, 113308 (2006).

26) Necmi Biyikli, C. W. Litton, J. Xie, Y. T. Moon, F. Yun, C. G. Stefanita, S. Bandyopadhyay, J. R. Meyer, and H. Morkoc, “Quantitative Mobility Spectrum Analysis of AlGaN/GaN Heterostructures Using Variable-Field Hall Measurements”, Materials Science Forum, 527-529, 1533 (2006).

25) Y. T. Moon, J. Xie, C. Liu, Y. Fu, X. Ni, Necmi Biyikli, K. Zhu, F. Yun, H. Morkoc, A. Sagar, and R. M. Feenstra, “A study of the morphology of GaN seed layers on in situ deposited SixNy and its effect on properties of overgrown GaN epilayers”, Journal of Crystal Growth, 291, 301 (2006).

24) Y. I. Alivov, X. Bo, S. S. Akarca-Biyikli, Q. Fan, J. Xie, Necmi Biyikli, K. Zhu, D. Johnstone, H. Morkoc, “Effect of annealing on electrical properties of radio-frequency-sputtered ZnO films”, Journal of Electronic Materials, 35, 520 (2006).

23) X. Ni, Y. Fu, Y. T. Moon, Necmi Biyikli, H. Morkoc, “Optimization of (11-20) a-plane GaN growth by MOCVD on (1-102) r-plane sapphire”, Journal of Crystal Growth, 290, 166 (2006).

22) Necmi Biyikli, J. Xie, Y. T. Moon, F. Yun, C. G. Stefanita, S. Bandyopadhyay, H. Morkoc, I. Vurgaftman, J. R. Meyer, “Quantitative mobility spectrum analysis of AlGaN/GaN heterostructures using variable-field Hall measurements”, Applied Physics Letters, 88, 142106 (2006).

21) Y. Fu, F. Yun, Y. T. Moon, U. Ozgur, J. Q. Xie, X. F. Ni, Necmi Biyikli, H. Morkoc, L. Zhou, D. J. Smith, C. K. Inoki, and T. S. Kuan, “Dislocation reduction in GaN grown on porous TiN networks by metal-organic vapor-phase epitaxy”, Journal of Applied Physics, 99, 033518 (2006).

20) Necmi Biyikli, Ibrahim Kimukin, Turgut Tut, Orhan Aytur, and Ekmel Ozbay, “Fabrication and characterisation of solar-blind Al0.6Ga0.4N MSM photodetectors”, IEE Electronics Letters, 41, 274 (2005).

19) Turgut Tut, Necmi Biyikli, Ibrahim Kimukin, Tolga Kartaloglu, Orhan Aytur, and Ekmel Ozbay, “High Bandwidth-Efficiency Solar-Blind AlGaN Schottky Photodiodes with Low Dark Current”, Solid State Electronics 49, 117 (2005).

18) Necmi Biyikli, Ibrahim Kimukin, Orhan Aytur, and Ekmel Ozbay, “ITO-Schottky Photodiodes for High-Performance Detection in the UV-IR Spectrum”, IEEE Journal of Selected Topics in Quantum Electronics, 10, 759 (2004).

17) Necmi Biyikli, Ibrahim Kimukin, Turgut Tut, Tolga Kartaloglu, Orhan Aytur, and Ekmel Ozbay, “High-speed characterization of solar-blind AlxGa1xN p-i-n photodiodes”, Semiconductor Science & Technology, 19, 1259 (2004).

16) Ibrahim Kimukin, Necmi Biyikli, Tolga Kartaloglu, and Ekmel Ozbay, “High-speed InSb p-i-n photodiodes”, IEEE Journal of Selected Topics in Quantum Electronics, 10, 766 (2004).

15) (invited) Ekmel Ozbay, Necmi Biyikli, Ibrahim Kimukin, T. Tut, T. Kartaloglu, and Orhan Aytur, “High-Performance Solar-Blind Photodetectors Based on AlxGa1-xN Heterostructures”, IEEE Journal of Selected Topics in Quantum Electronics, 10, 742 (2004).

14) Necmi Biyikli, Ibrahim Kimukin, Orhan Aytur, and Ekmel Ozbay, “Solar-blind AlGaN-based p-i-n photodiodes with low dark current and high detectivity”, IEEE Photonics Technology Letters, 16, 1718 (2004).

13) B. Butun, N. Biyikli, Orhan Aytur, Ibrahim Kimukin, Ekmel Ozbay, P.A. Postigo, J.P. Silveira, and A.R. Alija, “High-speed 1.55 mm operation of low-temperature grown GaAs based resonant cavity enhanced p-i-n photodiodes”, Applied Physics Letters, 84, 4185 (2004).

12) Necmi Biyikli, Ibrahim Kimukin, Tolga Kartaloglu, Orhan Aytur, and  Ekmel Ozbay, “High-speed visible-blind resonant cavity enhanced AlGaN Schottky photodiodes”,  MRS Internet Journal of Nitride Semiconductor Research, 8, 8 (2003).

11) Necmi Biyikli, Ibrahim Kimukin, Tolga Kartaloglu, Orhan Aytur, and Ekmel Ozbay, “High-speed solar-blind AlGaN-based metal-semiconductor-metal photodetectors”, Physica Status Solidi C, 0, 2314 (2003).

10) Ibrahim Kimukin, Necmi Biyikli, and Ekmel Ozbay, “1.55 mm InSb p-i-n photodiodes”, Journal of Applied Physics [Rapid Communications], 94, 5414 (2003).

9) Necmi Biyikli, Ibrahim Kimukin, Tolga Kartaloglu, Orhan Aytur, Ekmel Ozbay, “High-speed solar-blind photodetectors with indium-tin-oxide Schottky contacts”, Applied Physics Letters, 82, 2344 (2003).

8) Necmi Biyikli, Tolga Kartaloglu, Orhan Aytur, Ibrahim Kimukin, and Ekmel Ozbay, “High-Performance Solar-Blind AlGaN Schottky Photodiodes”, MRS Internet Journal of Nitride Semiconductor Research, 8, 2 (2003).

7) Necmi Biyikli, Orhan Aytur, Ibrahim Kimukin, Turgut Tut, and Ekmel Ozbay, “Solar-blind AlGaN-based Schottky photodiodes with low noise and high detectivity”,Applied Physics Letters, 81, 3272 (2002).

6) Ibrahim Kimukin, Necmi Biyikli, Bayram Butun, Orhan Aytur, Selim Unlu, and Ekmel Ozbay, “InGaAs Based High Performance p-i-n Photodiodes”, IEEE Photonics Technology Letters, 14, 366 (2002).

5) Ekmel Ozbay, Ibrahim Kimukin and Necmi Biyikli, “Ultrafast & Highly Efficient Resonant Cavity Enhanced Photodiodes”, Materials Science Forum, 384-385, 241 (2002).

4) Necmi Biyikli, Tolga Kartaloglu, Orhan Aytur, Ibrahim Kimukin, and Ekmel Ozbay, “High-speed visible-blind GaN-based indium–tin–oxide Schottky photodiodes”,Applied Physics Letters, 79, 2838 (2001).

3) Necmi Biyikli, ibrahim Kimukin, Orhan Aytür, Mutlu Gokkavas, Selim Ünlü, Ekmel Ozbay, “45-GHz Bandwidth-Efficiency Resonant-Cavity-Enhanced ITO-Schottky Photodiodes”, IEEE Photonics Technology Letters, 13, 705 (2001).

2) Ibrahim Kimukin, Ekmel Ozbay, Necmi Biyikli, Tolga Kartaloglu, Orhan Aytür, Selim Ünlü, and Gary Tutle, “High-speed GaAs-based resonant-cavity-enhanced 1.3µm photodetector”, Applied Physics Letters, 77, 3890 (2000).

1) Ekmel Ozbay, Ibrahim Kimukin, Necmi Biyikli, Orhan Aytür, Mutlu Gökkavas, Gökhan Ulu, R. Mirin, D. H. Christensen, and M.Selim Ünlü, “High-Speed >90% Quantum-Efficiency p-i-n Photodiodes with a Resonance Wavelength Adjustable in 795-835 nm Range,” Applied Physics Letters, 74, 1072 (1999).

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