Ahmad Umar
Ahmad Umar
The Ohio State University, USA, Najran University, KSA
Verified email at - Homepage
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Zinc Oxide Nanostructures for NO2 Gas–Sensor Applications: A Review
R Kumar, O Al-Dossary, G Kumar, A Umar
Nano-Micro Letters 7, 97-120, 2015
Hierarchical porous carbon aerogel derived from bagasse for high performance supercapacitor electrode
P Hao, Z Zhao, J Tian, H Li, Y Sang, G Yu, H Cai, H Liu, CP Wong, ...
Nanoscale 6 (20), 12120-12129, 2014
Antimicrobial properties of ZnO nanomaterials: A review
R Kumar, A Umar, G Kumar, HS Nalwa
Ceramics International 43 (5), 3940-3961, 2017
Hierarchical SnO2 Nanostructures Made of Intermingled Ultrathin Nanosheets for Environmental Remediation, Smart Gas Sensor, and Supercapacitor Applications
Y Liu, Y Jiao, Z Zhang, F Qu, A Umar, X Wu
ACS applied materials & interfaces 6 (3), 2174-2184, 2014
Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines
H Qi, M Teng, M Liu, S Liu, J Li, H Yu, C Teng, Z Huang, H Liu, Q Shao, ...
Journal of colloid and interface science 539, 332-341, 2019
Zinc oxide nanonail based chemical sensor for hydrazine detection
A Umar, MM Rahman, SH Kim, YB Hahn
Chemical Communications, 166-168, 2008
Highly effective Fe-doped TiO2 nanoparticles photocatalysts for visible-light driven photocatalytic degradation of toxic organic compounds
S Sood, A Umar, SK Mehta, SK Kansal
Journal of colloid and interface science 450, 213-223, 2015
ZnO nanoparticles: growth, properties, and applications
M Vaseem, A Umar, YB Hahn
Metal oxide nanostructures and their applications 5 (1), 10-20, 2010
Growth of aligned ZnO nanorods and nanopencils on ZnO/Si in aqueous solution: growth mechanism and structural and optical properties
Q Ahsanulhaq, A Umar, YB Hahn
Nanotechnology 18 (11), 115603, 2007
Ultra-sensitive cholesterol biosensor based on low-temperature grown ZnO nanoparticles
A Umar, MM Rahman, M Vaseem, YB Hahn
Electrochemistry Communications 11 (1), 118-121, 2009
Catalyst-free large-quantity synthesis of ZnO nanorods by a vapor–solid growth mechanism: structural and optical properties
A Umar, SH Kim, YS Lee, KS Nahm, YB Hahn
Journal of Crystal Growth 282 (1-2), 131-136, 2005
Metal oxide nanostructures and their applications
American Scientific Publisher, 2010
ZnO nanosheet networks and hexagonal nanodiscs grown on silicon substrate: growth mechanism and structural and optical properties
A Umar, YB Hahn
Nanotechnology 17 (9), 2174, 2006
Structural and optical properties of single-crystalline ZnO nanorods grown on silicon by thermal evaporation
A Umar, B Karunagaran, EK Suh, YB Hahn
Nanotechnology 17 (16), 4072, 2006
Ultraselective and sensitive detection of xylene and toluene for monitoring indoor air pollution using Cr-doped NiO hierarchical nanostructures
HJ Kim, JW Yoon, KI Choi, HW Jang, A Umar, JH Lee
Nanoscale 5 (15), 7066-7073, 2013
A critical review on the heterogeneous catalytic oxidation of elemental mercury in flue gases
Y Gao, Z Zhang, J Wu, L Duan, A Umar, L Sun, Z Guo, Q Wang
Environmental Science & Technology 47 (19), 10813-10823, 2013
High sensitive and low-concentration sulfur dioxide (SO2) gas sensor application of heterostructure NiO-ZnO nanodisks
Q Zhou, W Zeng, W Chen, L Xu, R Kumar, A Umar
Sensors and Actuators B: Chemical 298, 126870, 2019
Pt nanoparticles decorated SnO2 nanoneedles for efficient CO gas sensing applications
Q Zhou, L Xu, A Umar, W Chen, R Kumar
Sensors and Actuators B: Chemical 256, 656-664, 2018
Highly-sensitive cholesterol biosensor based on well-crystallized flower-shaped ZnO nanostructures
A Umar, MM Rahman, A Al-Hajry, YB Hahn
Talanta 78 (1), 284-289, 2009
Low-temperature synthesis of flower-shaped CuO nanostructures by solution process: formation mechanism and structural properties
M Vaseem, A Umar, SH Kim, YB Hahn
The Journal of Physical Chemistry C 112 (15), 5729-5735, 2008
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