Author

H. M. Umar

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Review Open access Oct 2026

Recent advances in neem-mediated green synthesis of Ag-doped ZnO nanostructures: fundamentals, characterization, visible-light photocatalysis, and optoelectronic applications

Zinc oxide (ZnO) is among the most heavily studied wide-band-gap semiconductors, but its practical use in visible-light Photocatalysis and optoelectronic devices is limited by a band gap confined to the near-ultraviolet and by fast electron-hole recombination. Doping with silver addresses both limitations, and synt...

Huzaifa Ali Saleh, H. M. Umar, Auwal Adam et al. · Journal of Materials Science... · 0 citations

Open access Oct 2026

Physics Informed Machine Learning for Electrical Sensing and Prediction of Heavy Metal Contamination in Water

Access to safe drinking water remains a global challenge, with approximately 2.1 billion people lacking safely managed water services. Continuous, low-cost monitoring of heavy metal contamination is limited because conventional techniques such as atomic absorption spectroscopy (AAS) and inductively coupled plasma mass...

H. M. Umar, I. Mahmoud, Neha Shrivas et al. · Techno-computing Journal · 0 citations

Open access Oct 2026

Comparative Structural, Optical, Morphological and Elemental Characterisation of Jujube-Mediated Silver and Zinc Oxide Nanoparticles

Plant extracts offer a practical route for nanoparticle synthesis because naturally occurring compounds can participate in particle formation and remain associated with the resulting material. In this study, jujube extract was used to prepare silver nanoparticles (AgNPs) and zinc oxide nanoparticles (ZnO NPs). Both pro...

H. M. Umar, Jamilatu Sumaila, T. Zangina · FUDMA Journal of Sciences · 0 citations