[1] Ahmed A. Ibrahim, Rajesh Kumar, Ahmad Umar*, S. H. Kim, A. Bumajdad, Z. Ansari, S. Baskoutas, "Cauliflower-shaped ZnO nanomaterials for chemical sensing and photocatalytic applications" Electrochimica Acta 222 (2016) 463-472; http://dx.doi.org/10.1016/j.electacta.2016.10.199

[2] Savita Chaudhary, Yesbinder Kaur, Ahmad Umar, Ganga Ram Chaudhary, "Ionic liquid and surfactant functionalized ZnO nanoadsorbent for Recyclable Proficient Adsorption of toxic dyes from waste water" Journal of Molecular Liquids 224 (2016) 1294-1304. DOI: 10.1016/j.molliq.2016.10.11

[3] Jin-Tak Jeong, Mun-Ki Choi, Yumin Sim, Jung-Taek Lim, Gil-Sung Kim, Maeng-Je Seong, Jung-Hwan Hyung, Keun Soo Kim, Ahmad Umar*, and Sang-Kwon Lee, "Effect of graphene oxide ratio on the cell adhesion and growth behavior on a graphene oxide-coated silicon substrate" Scientific Reports, Nature Publications 6 (2016) 33835. DOI: 10.1038/srep33835

[4] Sang-Hoon Kim and Ahmad Umar*, "Fabrication and characterization of ZnO nanoneedles based field emission devices", Nanoscience and Nanotechnology Letters, 8 (2016) 885-889; doi.org/10.1166/nnl.2016.2260

 [5] Sang Hoon Kim, Ahmad Umar*, Rajesh Kumar, "Synthesis of Sn-doped ZnO nanostructures for 4-nitrophenol chemical sensor application", Nanoscience and Nanotechnology Letters 8 (2016) 827-832, Special issue article

[6] Yas Al-Hadeethi, Saleh. H. Al-Heniti, Ahmad Umar*, "Low-temperature grown ZnO nanoflakes for dye sensitized solar cell application" Nanoscience and Nanotechnology Letters 8 (2016) 874-879. Special issue article doi.org/10.1166/nnl.2016.2256

[7] P. Saharan, G. R. Chaudhary, S.K. Mehta and Ahmad Umar*, "Efficient Photocatalytic degradation of Victoria blue R and fast green FCF dyes using ?-Fe2O3 and Fe3O4 nanoparticles" Nanoscience and Nanotechnology Letters 8 (2016) 965-971, Special issue article doi.org/10.1166/nnl.2016.2182

[8] Shunyu Yao, Xu Zhang, Fengyu Qu, Ahmad Umar, Xiang Wu, "Hierarchical WO3 nanostructures assembled by nanosheets and their applications in wastewater purification" Journal of Alloys and Compounds 689 (2016) 570-574, doi:10.1016/j.jallcom.2016.08.025

[9] Ahmed A. Ibrahim, Ahmad Umar*, R. Kumar, S. H. Kim, Ali Bumajdad, S. Baskoutas, "Sm2O3 doped ZnO beech fern hierarchical structures for nitroaniline chemical sensor", Ceramic International 42 (2016) 16505-16511; doi:10.1016/j.ceramint.2016.07.061

[10] Yili Zhang, Zhang Zhang, Tuantuan Zhou, Peng Lu, Yanshan Gao, Feng Yu, Ahmad Umar, Qiang Wang, "Synthesis and characterization of alkali metal molybdates with high catalytic activity for dye degradation", RSC Advances 6 (2016) 54553-54563 DOI: 10.1039/C6RA12437B

[11] Mingxuan Sun, Yalin Fang; Yuanyuan Kong, Shanfu Sun; Zhishui Yu; Ahmad Umar*, "Graphitic carbon nitride (g-C3N4) coated titanium oxide nanotube arrays with enhanced photo-electrochemical performance" Dalton Transactions 45 (2016) 12702-12709; DOI: 10.1039/C6DT02071B

[12] Sandeep Kumar, Shelja Sharma, Swati Sood, Ahmad Umar* and Sushil Kumar Kansal, "Bismuth Sulphide (Bi2S3) nanotubes decorated TiO2 nanoparticles heterojunction assembly for enhanced solar light driven photocatalytic activity" Ceramic International 42 (2016) 17551-17557; doi: 10.1016/j.ceramint.2016.08.068

[13] P. Sharma, D.S. Rana, Ahmad Umar*, R. Kumar, K. Negi, M.S. Chauhan, S. Chauhan, "Iron oxide nanocubes for photocatalytic degradation and antimicrobial properties" Special issue article Nanosci. Nanotech. Lett. 8 (2016) 1014-1019,. doi.org/10.1166/nnl.2016.2189

[14] Zhang Zhang, Yu Zhang, Tuantuan Zhou, Cheng Zhang, Peng Lu, Yanshan Gao, Ahmad Umar, Hongjie Wang, Qiang Wang, "Synthesis of Na2Mo4O13/?-MoO3 hybrid material using different sodium precursors for the degradation of cationic red GTL" Nanosci. Nanotech. Lett. 8 (2016) 924-930 Special issue article doi.org/10.1166/nnl.2016.2176

[15] Ahmad Umar,* Jong-Heun Lee, Rajesh Kumar, O. Al-Dossary, Ahmed A. Ibrahim, S. Baskoutas, "Development of highly-sensitive and selective ethanol sensor based on lance-shaped CuO nanostructures" Materials and Design 105 (2016) 16-24; doi:10.1016/j.matdes.2016.05.006

[16] Ahmad Umar,* H Algarni, S.H Kim, M.S Al-Assiri "Time dependent  growth of ZnO nanoflowers with enhanced field emission properties" Ceramic International 42 (2016) 13215-13222, doi:10.1016/j.ceramint.2016.05.114

[17] Peng Lu, Shuai Liang, Tuantuan Zhou, Xueyi Mei, Yu Zhang, Cheng Zhang, Ahmad Umar, Qiang Wang, "Layered double hydroxide/graphene oxide hybrid incorporated polysulfone substrate for thin?film nanocomposite forward osmosis membranes", RSC Advances 6 (2016) 56599-56609; DOI: 10.1039/C6RA10080E

[18] Tuantuan Zhou, Peng Lu, Qiang Wang, Ahmad Umar*, "Perforated Co3O4 nanoneedles assembled in Chrysanthemum-like Co3O4 structures for ultra-high sensitive hydrazine chemical sensor" Sensors and Actuators B: Chemical 235 (2016) 457-465; doi:10.1016/j.snb.2016.05.075

[19] Naushad Ahmad, Ahmad Umar*, Rajesh Kumar, Manawwer Alam, "Microwave-assisted synthesis of ZnO doped CeO2 nanoparticles as potential scaffold for highly sensitive nitroaniline chemical sensor" Ceramic International 42 (2016) 11562-11567; doi:10.1016/j.ceramint.2016.04.013

[20] Savita Chaudhary, Yesbinder Kaur, Ahmad Umar*, Ganga Ram Chaudhary, "1-butyl-3-methylimidazolium tetrafluoroborate functionalized ZnO nanoparticles for removal of toxic organic dyes" J. Molecular Liquids 220 (2016) 1013-1021; doi:10.1016/j.molliq.2016.05.011

[21] Ahmad Umar*, Rafiq Ahmad, Rajesh Kumar, Ahmed A. Ibrahim, S. Baskoutas, "Bi2O2CO3 nanoplates: Fabrication and characterization of highly sensitive and selective cholesterol biosensor" Journal of Alloys and Compounds 683 (2016) 433-438 doi:10.1016/j.jallcom.2016.05.063

[22] Savita Chaudhary, Ahmad Umar*, "Glycols functionalized fluorescent Eu2O3 nanopart1icles: functionalization effect on the structural and optical properties" Journal of Alloys and Compounds 682 (2016) 160-169. doi.org/10.1016/j.jallcom.2016.04.296

[23] S. Chauhan, J. Jyoti, Lalita Pathania, Ahmad Umar* and M.S. Chauhan, "Carbohydrate-Surfactant Interactions in Aqueous and Mixed Organic Solvents at Various Temperatures: Volumetric, compressibility and Acoustical Studies" Journal of Molecular Liquids 218 (2016) 637-648. doi.org/10.1016/j.molliq.2016.02.078

[24] Huanghao Xiao, Fengyu Qu, Ahmad Umar*, Xiang Wu, "Facile synthesis of SnO2 hollow microspheres composed of nanoparticles and their remarkable photocatalytic performance". Materials Research Bulletin 74 (2016) 284-290 10.1016/j.materresbull.2015.10.055

[25] Jingwen Wu, Tuantuan Zhou, Qiang Wang, Ahmad Umar* "Morphology and chemical composition dependent synthesis and electrochemical properties of MnO2 based nanostructures for efficient hydrazine detection", Sensors and Actuators B: Chemical 224 (2016) 878-884. doi.org/10.1016/j.snb.2015.09.016

[26] Sandeep Kumar, Gaurav Bhanjana, Neeraj Dilbaghi, Rajeev Kumar and Ahmad Umar*, "Fabrication and characterization of highly sensitive and selective arsenic sensor based on ultra-thin graphene oxide nanosheets", Sensors and Actuators B: Chemical 227 (2016) 29-34 doi.org/10.1016/j.snb.2015.11.101

[27] H. Algarni, Ahmad Umar*, Sang Hoon Kim, M. S. Al-Assiri, S. AlFaify, "Enhanced Field emission properties of Aligned ZnO Nanowires" Nanosci. Nanotech. Lett. 8, (2016) 521-526 doi.org/10.1166/nnl.2016.2160

[28] Sheifali Shukla, Ahmad Umar*, Savita Chaudhary, G. R. Chaudhary, S. K. Kansal, Surinder Kumar Mehta, "Bare and cationic surfactants capped Tungsten trioxide nanoparticles based hydrazine chemical sensors: A comparative study" Sensors and Actuators B: Chemical 230 (2016) 571-580 doi.org/10.1016/j.snb.2016.02.090

[29] Ahmad Umar*, Sang-Hoon Kim, Rajesh Kumar, Hamed Algarni, "Platinum nanoparticles decorated carbon nanotubes for highly sensitive 2- nitrophenol chemical sensor" Ceramic International 42 (2016) 9257-9263. doi.org/10.1016/j.ceramint.2016.03.032

[30] Sang-Hoon Kim, Ahmad Umar*, Rajesh Kumar, Hamed Algarni, M. S. Al-Assiri, "Poly(acrylic acid) –multi walled carbon nanotube composites: Efficient Scaffold for highly sensitive 2-nitrophenol chemical sensor" Nanosci. Nanotech. Lett. 8 (2016) 200-206. doi.org/10.1166/nnl.2016.2110

[31] No-Won Park, Jay-Young Ahn, Ahmad Umar, Soon-Gil Yoon and Sang-Kwon Lee, "Thermoelectric properties of n-type bismuth telluride (Bi2Te3 ) thin films prepared by RF sputtering" Sci. Adv. Mater. 8 (2016) 1172-1176. doi.org/10.1166/sam.2016.2743

[32] Shailesh S. Dixit, Atul Kulkarni, Hyo Hyun Seo, Jayant Gadgil, Medini Dingre, Ahmad Umar, Sang Hyun Moh and Varsha A. Parasharami, "Anti-oxidant properties of Ficus religiosa L. bark extract on human keratinocytes" Sci. Adv. Mater. 8 (2016) 1221-1226. doi.org/10.1166/sam.2016.2740

[33] P. Sharma, D.S. Rana, Ahmad Umar*, R. Kumar, M.S. Chauhan, S. Chauhan, "Hexagonal Cadmium Oxide nanodisks: Efficient scaffold for cyanide ion sensing, and photo-catalytic applications" Talanta 153 (2016) 57-65. DOI: 10.1016/j.talanta.2016.02.048

[34] A. Kaur, S. Sharma, S. Sood, Ahmad Umar,* S. S. Bhinder, S. K. Kansal, "Visible light driven photo-catalytic degradation of fluoroquinolone antibiotic drug using Bi2WO6 spheres composed of fluffy nanosheets" Nanosci. Nanotech. Lett. 8, (2016) 660-666. doi.org/10.1166/nnl.2016.2170

[35] Zhen-Ni Yang, Xiao-Min Li, Ahmad Umar, Wen-Hong Fan and Yao Wang, "Insight to Calcification of Synechocystis sp. Enhanced by Extracellular Carbonic Anhydrase" RSC Advances 6 (2016) 29811-29817. DOI:10.1039/C5RA26159G

[36] Zhanhu Guo,   Jiang Guo,   Jun Long,   Daowei Ding,   Qiang Wang,  Ahmad Umar,   Xin Zhang,   Brandon Weeks,   Yu Shan and  Suying Wei,   "Significantly enhanced mechanical and electrical properties of epoxy nanocomposites reinforced with low loading of Polyaniline nanoparticles" RSC Advances  6 (2016) 21187-21192, DOI: 10.1039/C5RA25210E

[37] Sandeep Kumar, Shelja Sharma, Ahmad Umar* and Sushil Kumar Kansal, "Bismuth Sulphide (Bi2S3) nanotubes as an efficient photocatalyst for methylene blue dye degradation" Nanosci. Nanotech. Lett. 8 (2016) 266-272. doi.org/10.1166/nnl.2016.2108

[38] Sheifali Shukla, Ahmad Umar*, Ganga Ram Chaudhary, S.K. Mehta, "Surfactant Functionalized Tungsten Oxide Nanoparticles with Enhanced Photocatalytic activity" Chemical Engineering Journal 288 (2016) 423-431. doi.org/10.1016/j.cej.2015.12.039

[39] Tuantuan Zhou, Churuo Zhang, Peng Lu, Zhang Zhang, Yanshan Gao, Qiang Wang, Ahmad Umar*, "Morphology controlled synthesis of Co3O4 nanostructures for hydrazine chemical sensor applications", Nanosci. Nanotech. Lett. 8 (2016) 634-640. doi.org/10.1166/nnl.2016.2169

[40] Zhang Zhang, Fei Xu, Yili Zhang, Ahmad Umar, Qiang Wang, "The influence of Na species addition on the synthesis and catalytic activity of Na2Mo4O13/??MoO3 as CWAO catalyst" Catalysis Today 278 (2016) 192-202; doi:10.1016/j.cattod.2015.10.031

[41] P. Sharma, D.S. Rana, Ahmad Umar*, R. Kumar, M.S. Chauhan, S. Chauhan, "Synthesis of cadmium sul?de nanosheets for smart photocatalytic and sensing applications" Ceramics International 42 (2016) 6601–6609. doi.org/10.1016/j.ceramint.2015.12.151

[42] Zeenat Khatoon, Taimur Athar, H. Fouad, Ahmad Umar, Z. A. Ansari, S. G. Ansari, "Highly sensitive hydrazine chemical sensor based on nickel doped antimony oxide nanoellipsoids modified screen-printed electrode" Nanosci. Nanotech. Lett. 8 (2016) 555-560. doi.org/10.1166/nnl.2016.2168

[43] S. Chauhan, K. Singh, M.S. Chauhan. Ahmad Umar* and C.N. Sundaresan, "Intermolecular interactions of L-Glutamine and L-Histidine in aqueous solutions of Metformin Hydrochloride: Thermo-acoustic and optical properties" Journal of Molecular Liquids 214 (2016) 390-399. doi.org/10.1016/j.molliq.2015.11.035

[44] S. H. Kim, Ahmad Umar, R. Kumar, S. W. Hwang, "Synthesis and characterization of mimosa pudica leaves shaped ?-iron oxide nanostructures for Ethanol chemical sensor applications" Journal of Nanoscience and Nanotechnology, 16 (2016) 2944-2949. doi.org/10.1166/jnn.2016.12334

[45] Junya Wang, Wenlong Bao, Ahmad Umar, Qiang Wang, Dermot O'Hare, Yinglang Wan, "Delaminated layered double hydroxide nanosheets as an efficient vector for DNA delivery" Journal of Biomedical Nanotechnology, 12 (2016) 922-933. doi.org/10.1166/jbn.2016.2252

[46] Yanshan Gao, Qiang Wang, Lei Qiu, Jingwen Wu, Xingru Yan, Ahmad Umar, Jiang Guo, Xi Zhang, Junya Wang, Zhanhu Guo, "Ethylene-vinyl acetate/LDH nanocomposites with enhanced thermal stability, flame retardancy and rheological property", Polymer Composites 37 (2016)3449-3459; doi: 10.1002/pc.23545

[47] Ahmad Umar,*Jong-Heun Lee, Rajesh Kumar, O.Al-Dossary, "High-sensitive ethanol gas sensors based on Ag-doped ZnO nanocones" Nanosci. Nanotech. Lett. 8 (2016) 241-246. doi.org/10.1166/nnl.2016.2109

[48] Othman Y. Alothman, H. Fouad, Ubair Abdus Samad, Ahmad Umar*, and S. G. Ansari, "Nanoclay-Reinforced High Density Polyethylene: Morphological and Nano-Indentation Characterizations", Sci. Adv. Mater. 8, (2016) 458-465. doi.org/10.1166/sam.2016.2727

[49] Sang-Hoon Kim, Ahmad Umar*, Rajesh Kumar, Hamed Algarni, M. S. Al-Assiri, "Fabrication of nitroaniline chemical sensor based on polyaniline coated multi-walled carbon nanotubes" Nanosci. Nanotech. Lett. 8 (2016) 193-199. doi.org/10.1166/nnl.2016.2107

[50] Qiang Wang, Shuai Liang and Ahmad Umar, "A SPECIAL ISSUE ON Advanced Nanomaterials for Energy and Environmental Sustainability", Nanoscience and Nanotechnology Letters 8, 903-905 (2016) [Special issue-Editorial] DOI: 10.1166/nnl.2016.2173

[51] Sang-Kwon Lee and Ahmad Umar, "A Special Issue on Energy Generating Devices and Bio-Inspired Nanoscale Materials" Nanoscience and Nanotechnology Letters 8, 799-801 (2016) [Special issue-Editorial] DOI: 10.1166/nnl.2016.2193.

[52] Ahmad Umar, S. G. Ansari, and Sang-Kwon Lee, "A Special Issue on Functional Materials based Sensors" Sensor Lett. 14, 109-113 (2016) [Special Issue-Editorial] DOI: 10.1166/sl.2016.3655

[53] Xiang Wu, Chuanfei Guo, Haibo Zeng, and Ahmad Umar, "A Special Section on Hierarchically Nanostructured Materials for Environmental and Energy Applications" Sci. Adv. Mater. 8, 1227–1230 (2016) [Special issue-Editorial] DOI: 10.1166/sam.2016.2756

[54] Ahmad Umar, S. G. Ansari, and Sang-Kwon Lee, "A Special Issue on Advanced Materials for Sensors Applications" Sensor Lett. 14, 325-330 (2016) [Special issue-Editorial] DOI: 10.1166/sl.2016.3683

[55] S. G. Ansari, Ahmad Umar, and Sang-Kwon Lee, "A Special Issue on Biosensors" Sensor Lett. 14, 1-3 (2016) [Special issue-Editorial] doi.org/10.1166/sl.2016.3615

[56] Peng Lu, Shuai Liang, Tuantuan Zhou, Xueyi Mei, Yu Zhang, Cheng Zhang, Ahmad Umar, Hongjie Wang, Qiang Wang, "Typical thin–film composite (TFC) membranes modified with inorganic nanomaterials for forward osmosis: A review" Nanosci. Nanotech. Lett. 8, 906-916 (2016) [Special issue-invited article] DOI: I:10.1166/nnl.2016.2174

[57] Radhika N.P., Rosilda Selvin, R. Kakkar and Ahmad Umar*, "Recent Advances in Nano-photocatalysts for Organic Synthesis" Arabian Journal of Chemistry (2016); DOI: 10.1016/j.arabjc.2016.07.007,

[58] Savita Chaudhary, Ahmad Umar* and S.K. Mehta, "Selenium nanomaterials: An overview of recent developments in synthesis, properties, and potential applications", Progress in Materials Science 83 (2016) 270-329; DOI: 10.1016/j.pmatsci.2016.07.001

[59] Qinghua Yan, Ruoyan Yang, Yili Zhang, Ahmad Umar, Zhanggen Huang, Qiang Wang, "A comprehensive review on selective catalytic reduction catalysts for NOx emission abatement from municipal solid waste incinerators" Environmental Progress and Sustainable Energy 35 (2016) 1061-1069; DOI: 10.1002/ep.12328.

[60] Amandeep Kaur, Ahmad Umar* and Sushil K Kansal, "Heterogeneous Photocatalytic studies of analgesic and Non-steroidal anti-inflammatory drugs: A Review" Applied Catalysis A: General, (2016) 134-155 DOI: 10.1016/j.apcata.2015.11.008