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Publication 2011

[1] A. A. Alharbi, M. Alkahtani, Ahmad Umar*, O. Al-Dossary, M. M. Abdullah, "Growth of La0.7Sr0.3MnO3 Thin-Films on SrTiO3 (100) substrate by Pulsed Laser Deposition: Structural, Optical and Electrical Properties", Advanced Science Letter, 4 (2011) 3475-3479. doi.org/10.1166/asl.2011.1969

[2] Z.A. Ansari, Mazhar-ul-Haque, Hyung-Kee Seo, Ahmad Umar*, Ali Al-Hajry, S. A. Al-Sayari, Hyung-Shik Shin, S.G. Ansari, "Urea sensing properties of Cu-doped Titanate nanostructure", Advanced Science Letter, 4 (2011) 3451-3457; DOI: 10.1166/asl.2011.1978

[3] S. K. Mehta, Kulvinder Singh, Ahmad Umar*, G. R. Chaudhary and Sukhjinder Singh, "Well-Crystalline ?-Fe2O3 Nanoparticles for Hydrazine Chemical Sensor Application", Science of Advanced Materials, 3 (2011) 962-967. DOI: 10.1166/sam.2011.1244

[4] M. Abaker, Ahmad Umar*, S. Baskoutas, G. N. Dar, S. A. Zaidi, S. A. Al-Sayari, A. Al-Hajry, S. H. Kim and S. W. Hwang, "Highly Sensitive Ammonia Chemical Sensor Based on ?-Fe2O3 nanoellipsoids", Journal of Physics D: Applied Physics, 44 (2011) 425401. DOI: 10.1088/0022-3727/44/42/425401

[5] S. H. Kim, Ahmad Umar, S. H. Al-Heniti, A. Al-Hajry and A. A. Al-Ghamdi, "Growth, structural and optical properties of well-crystalline Al-doped ZnO nanowire and their based field effect transistor (FET)", Science of Advanced Materials, 3 (2011) 719-724. doi.org/10.1166/sam.2011.1235

[6] Surinder K Mehta, Khushboo, Ahmad Umar*, "Highly sensitive Hydrazine Chemical Sensor Based on Mono-Dispersed Rapidly Synthesized PEG-coated ZnS Nanoparticles", Talanta, 85 (2011) 2411-2416. doi.org/10.1016/j.talanta.2011.07.089

[7] S. W. Hwang, Ahmad Umar*, S. H. Kim, S. A. Al-Sayari, M. Abaker, A. Al-Hajry, A. M. Stephen, "Low-temperature growth of well-crystalline Co3O4 hexagonal nanodisks as anode material for lithium-ion battery application", Electrochimica Acta, 56 (2011) 8534-8538. doi.org/10.1016/j.electacta.2011.07.033

[8] S. H. Kim, Ahmad Umar*, S. W. Hwang, S. A. Al-Sayari, M. Abaker and A. Al-Hajry, "Well-crystallized ZnO nanowire based field effect transistors (FETs)", Journal of Nanoscience and Nanotechnology, 11 (2011) 5102-5107. doi.org/10.1166/jnn.2011.4744

[9] Ahmad Umar*, M. S. Akhtar, A. Al-Hajry, M. S. Chauhan and S. Chauhan, "Growth, Properties and Dye-Sensitized Solar Cells (DSSCs) Applications of ZnO Nanocones and Small Nanorods", Science of Advanced Materials, 3 (2011) 695-701. DOI: 10.1166/sam.2011.1237

[10] M. Abaker, S. A. Al-Sayari, S. Baskoutas, Mohammed M. Rahman, A. Al-Hajry, S. H. Kim, S. W. Hwang and Ahmad Umar*, "Utilization of CuO Layered Hexagonal Disks for Room-Temperature Aqueous Ammonia Sensing Application", AIP Conference Proceedings, 1370 (2011) 97; doi: 10.1063/1.3638088.

[11] M. Abaker, Ahmad Umar*, S. A. Al-Sayari, G. N. Dar, M. Faisal, S. H. Kim and S. W. Hwang, "Growth and photocatalytic properties of Sb-doped ZnO nanoneedles by hydrothermal process", AIP Conference Proceedings, 1370 (2011) 121-127; doi: 10.1063/1.3638092.

[12] S. H. Kim, Ahmad Umar*, S. W. Hwang, H. Algarni, M. Abaker, S. A. Al-Sayari, G. N. Dar, A. Al-Hajry, "Growth of branched In-doped ZnO nanowires: Structural and Optical Properties", AIP Conference Proceedings, 1370 (2011) 142-148; doi: 10.1063/1.3638095.

[13] Ahmad Umar*, M. S. Chauhan, S. Chauhan, R. Kumar, G. Kumar, S. W. Hwang, S. A. Al-Sayari, A. Al-Hajry, "Large-scale synthesis of ZnO balls made of fluffy thin nanosheets by simple solution process: Structural, Optical and Photocatalytic properties", Journal of Colloid and Interface Science, 363 (2011) 521-528. doi.org/10.1016/j.jcis.2011.07.058

[14] M. Abaker, Ahmad Umar*, S. Baskoutas, S. H. Kim and S. W. Hwang, "Structural and Optical Properties of CuO Layered Hexagonal Disks Synthesized by Low-Temperature Hydrothermal Process", Journal of Physics D: Applied Physics, 44 (2011) 155405. DOI: 10.1088/0022-3727/44/15/155405

[15] M. S. Chauhan, R. Kumar, Ahmad Umar*, S. Chauhan, G. Kumar, M. Faisal and S. W. Hwang, "Utilization of ZnO nanocones for the photocatalytic degradation of Acridine Orange", Journal of Nanoscience and Nanotechnology, 11 (2011) 4061-4066 doi.org/10.1166/jnn.2011.4166

[16] M. Faisal, S. B. Khan, Mohammed M. Rahman, Aslam Jamal, Ahmad Umar, "Ethanol Chemi-Sensors: Evaluation of Structural optical and sensing properties of CuO nanosheets", Material Letters, 65 (2011) 1400-1403. doi.org/10.1016/j.matlet.2011.02.013

[17] R. M. Al-Tuwirqi, A.A. Al-Ghamdi, Nadia Abdel Aal, Ahmad Umar, W. E. Mahmoud*, "A Facile Synthesis and Optical Properties of Co3O4 Nanostructure by Microwave Route", Superlattices and Microstructures, 49 (2011) 416-421. doi.org/10.1016/j.spmi.2010.12.010

[18] Ahmad Umar*, Abdul Aziz Alharbi, Pragya Singh and S. A. Al-Sayari, "Growth of Aligned hexagonal ZnO Nanorods on FTO Substrate for Dye-Sensitized Solar Cells (DSSCs) Applications", Journal of Nanoscience and Nanotechnology, 11 (2011) 3560-3564. DOI: 10.1166/jnn.2011.4150

[19] Ahmad Umar*, M. Abaker, M. Faisal, S. W. Hwang and S. Baskoutas and S. A. Al-Sayari, "High-Yield Synthesis of Well-Crystalline ?-Fe2O3 Nanoparticles: Structural, Optical and Photocatalytic Properties", Journal of Nanoscience and Nanotechnology, 11 (2011) 3474-3480. doi.org/10.1166/jnn.2011.4148

[20] G. N. Dar, Ahmad Umar*, Shabi Abbas Zaidi, S. Baskoutas, S. H. Kim, M. Abaker, A. Al-Hajry and S. A. Al-Sayari, "Fabrication of High-Sensitive Non-Enzymatic Glucose Biosensor based on ZnO Nanorods", Science of Advanced Materials, 3 (2011) 901-906. DOI: 10.1166/sam.2011.1242

[21] Ahmad Umar, "Editorial: Welcome to Journal of Nanoengineering and Nanomanufacturing", Journal of Nanoengineering and Nanomanufacturing, 1 (2011) 1-3. doi.org/10.1166/jnan.2011.1001