[1] R. Wahab, Y. B. Yang, Ahmad Umar, Surya Singh, I. H. Hwang, Hyung-Shik Shin, Young-Soon Kim, "Platinum nanoparticles and their cytotoxic effect towards myoblast cancer cells (C2C12)", Journal of Biomedical Nanotechnology, 8 (2012) 424-431. DOI: 10.1166/jbn.2012.1448

[2] Suzan A. Khayyat, M. Abaker, Ahmad Umar*, Manal O. Alkattan, Najlaa D. Alharbi, S. Baskoutas, "Synthesis and Characterizations of Cd-doped ZnO Multipods for Environmental Remediation Application", Journal of Nanoscience and Nanotechnology 12 (2012) 8453-8458

[3] Surinder K Mehta*, Khushboo Salaria, Ahmad Umar*, "Highly Sensitive and Selective Cyanide Ion Sensor Based on Modified ZnS Nanoparticles", Electrochimica Acta, 81 (2012) 308-312; doi.org/10.1016/j.electacta.2012.07.018

[4] M. Abaker, G. N. Dar, Ahmad Umar*, S. A. Zaidi, Ahmed A. Ibrahim, S. Baskoutas, A. Al-Hajry, "CuO nanocubes based highly sensitive 4-Nitrophenol Chemical Sensor", Science of Advanced Materials, 4 (2012) 893-900. doi.org/10.1166/sam.2012.1383

[5] G. N. Dar, Ahmad Umar*, S. A. Zaidi, Ahmed A. Ibrahim, S. Baskoutas, "Ce-doped ZnO nanorods for the detection of hazardous chemical", Sensors and Actuators B: Chemical, 173 (2012) 72-78. doi.org/10.1016/j.snb.2012.06.001

[6] S. G. Ansari, Ahmad Umar, A. Al-Hajry, Salem S. Al-Deyab, Z. A. Ansari, "Effect of flower extracts on the optoelectronic properties of Cd and Sn doped TiO2 nanopowder", Science of Advanced Materials, 4 (2012) 763-770. DOI: 10.1166/sam.2012.1371

[7] Ahmad Umar*, M. S. Akhtar, A. Al-Hajry, M.S. Al-Assiri, N. Y. Almehbad, "Hydrothermally grown ZnO Nanoflowers for Environmental Remediation and Clean Energy Applications", Materials Research Bulletin, 47 (2012) 2407-2414. doi.org/10.1016/j.materresbull.2012.05.028

[8] O. Al-Dossary, Ahmad Umar*, A. A. Al-Harbi, S. A. Zaidi, G. N. Dar, "La0.7Sr0.3MnO3 Nanoparticles based Ultra-high sensitive Ammonia Chemical Sensor", Journal of Nanoscience and Nanotechnology, 12 (2012) 6368-6373. doi.org/10.1166/jnn.2012.6445

[9] Kiran, D.S. Rana, R.L. Balokhra, A. Umar, S. Chauhan, "A thermodynamic study of 1,4-dioxane across cellulose acetate membrane under different conditions", Fluid Phase Equilibria, 322-323 (2012) 148-158; doi.org/10.1016/j.fluid.2012.03.013

[10] Suzan Khayat, M. S. Akhtar, Ahmad Umar*, "ZnO Nanocapsules for photocatalytic degradation of thionine dye", Materials Letters, 81 (2012) 239-241; doi.org/10.1016/j.matlet.2012.04.039

[11] A. H. Ashry, H. El-Sammane, M. Abou-leila, W. Arafa, Ahmad Umar, A. M. Abdalla, T. Tsuruta, "A nuclear tester for micro-hardness measurement", Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 290 (2012) 39-42; doi.org/10.1016/j.nimb.2012.08.021

[12] M.S. Chauhan, Rajni, S. Chauhan, D.S. Rana and Ahmad Umar, "Effect of Temperature on Micellar Properties of Sodium Dodecyl Sulfate in Aqueous Solutions of Some Amino Acids (Glycine, Alanine, Valine and Leucine)", Advanced Science Letters, 5 (2012) 43-51. doi.org/10.1166/asl.2012.3317   

[13] S. K. Mehta, Kulvinder Singh, Ahmad Umar*, G. R. Chaudhary and Sukhjinder Singh, "Ultra-High Sensitive Hydrazine Chemical Sensor Based on Low-Temperature Grown ZnO Nanoparticles", Electrochimica Acta, 69 (2012) 128-133. doi.org/10.1016/j.electacta.2012.02.091

[14] Ahmed A. Ibrahim, G. N. Dar, Shabi Abbas Zaidi, Ahmad Umar*, S. H. Kim, H. Bouzid, S. Baskoutas, "Growth and properties of Ag-Doped ZnO nanoflowers for highly sensitive phenyl hydrazine chemical sensor application", Talanta, 95 (2012) 257-263. doi.org/10.1016/j.talanta.2012.02.030

[15] S. Chauhan, D.S. Rana, Akash, K. Rana, M.S. Chauhan, Ahmad Umar, "Temperature-Dependant Volumetric and Compressibility Studies of Drug-Surfactant Interactions in Dimethylsulfoxide (DMSO) Solutions", Advanced Science Letters, 5 (2012) 178-181. doi.org/10.1166/asl.2012.3252

[16] S. Chauhan, Seema, D.S. Rana, Rajni, M.S. Chauhan, Ahmad Umar, "Volumetric and Compressibility Studies of Salt Induced Hydrophobic Interactions in Pre–Micellar Region of Sodium Dodecyl Sulfate", Advanced Science, Engineering and Medicine, 4 (2012) 81-84. doi.org/10.1166/asem.2012.1122

[17] S.K. Mehta, Khushboo, Ahmad Umar*, Sanjay Kumar, "A mechanistic study of photoluminescence quenching of Cetryl Trimethyl Ammonium Bromide stabilized ZnS nanoparticles with ?-cyclodextrin", Journal of Nanoscience and Nanotechnology, 12 (2012) 1760-1764; doi.org/10.1166/jnn.2012.5851

[18] Ahmad Umar*, Faten Al-Hazmi, Ghulam Nabi Dar, S. A. Zaidi, Reem M. Al-Tuwirqi, Fowzia Alnowaiserb, Ahmad A Al-Ghamdi, S. W. Hwang, "Ultra-sensitive ethanol sensor based on rapidly synthesized Mg(OH)2 hexagonal nanodisks", Sensors and Actuators B: Chemical, 166-167 (2012) 97-102. doi.org/10.1016/j.snb.2011.12.103

[19] G.N. Dar, Ahmad Umar*, Shabi Abbas Zaidi, S. Baskoutas*, S.W. Hwang, M. Abaker, A. Al-Hajry, S.A. Al-Sayari, "Ultra-high sensitive ammonia chemical sensor based on ZnO nanopencils", Talanta, 89 (2012) 155-161; doi.org/10.1016/j.talanta.2011.12.006

[20] S. Al-Heniti, R. I. Badran*, Ahmad Umar*, A. Al-Ghamdi, S. H. Kim, F. Al-Marzouki, A. Al-Hajry, S. A. Al-Sayari, T. Al-Harbi, "Temperature Dependant Structural and Electrical Properties of ZnO Nanowire Networks", Journal of Nanoscience and Nanotechnology, 12 (2012) 68-74. DOI: 10.1166/jnn.2012.5117

[21] Faten Al-Hazmi, Ahmad Umar*, G. N. Dar, A. A. Al-Ghamdi, S. A. Al-Sayari, A. Al-Hajry, S. H. Kim, Reem M. Al-Tuwirqi, Fowzia Alnowaiserb, Farid El-Tantawy, "Microwave Assisted Rapid Growth of Mg(OH)2 Nanosheet Networks for Ethanol Chemical Sensor Application", Journal of Alloys and Compounds, 519 (2012) 4-8. doi.org/10.1016/j.jallcom.2011.09.089

 [22] S. G. Ansari, Laitka Bhayana, Ahmad Umar*, A. Al-Hajry, Salem S. Al-Deyab, Z. A. Ansari, "Understanding the effect of flower extracts on the photo-conducting properties of nanostructured TiO2", Journal of Nanoscience and Nanotechnology, 12 (2012) 7860-7868. DOI: 10.1166/jnn.2012.6642 ·

[23] Kulvinder Singh, Ahmad Umar*, A. Kumar, G. R. Chaudhary, Sukhjinder Singh and S. K. Mehta, "Non-Enzymatic Glucose Sensor based on Well-crystallized ZnO Nanoparticles", Science of Advanced Materials, 9 (2012) 994-1000. doi.org/10.1166/sam.2012.1399

[24] S. Chauhan, Kundan Sharma, D. S. Rana, G. Kumar, Ahmad Umar, "Conductance, apparent molar volume and compressibility studies of cetyltrimethylammonium bromide in aqueous solution of leucine", Journal of Molecular Liquids, 175 (2012) 103–110. doi.org/10.1016/j.molliq.2012.07.029

[25] Ahmad Umar, D. Xue, K. Li, "Editorial: Welcome to Materials Focus", Materials Focus, 1 (2012) 1-3. doi.org/10.1166/mat.2012.1001

[26] Ahmad Umar, "Editorial: Welcome to Energy and Environment Focus", Energy and Environment Focus, 1 (2012) 1-3. doi.org/10.1166/eef.2012.1001

[27] Ahmad Umar, "Editorial: Welcome to Reviews in Advanced Sciences and Engineering", Reviews in Advanced Sciences and Engineering, 1 (2012) 1-3. doi.org/10.1166/rase.2012.1001