Muhammad Nurdin; Ilham Ilham; Maulidiyah Maulidiyah; Muh. Zakir Muzakkar; Dwiprayogo Wibowo; Zul Arham; La Ode Agus Salim; Irwan Irwan; Catherina Bijang; Akrajas Ali Umar.  (2023).  Enhanced Photoelectrocatalytic Performance Using Chalcogenide Te/TiO2/ Ti Nanotube Array Based on COD Analyses for Water Treatment Applications.  - Electrocatalysis.  581-592. 

Siti Naqiyah Sadikin, Jaenudin Ridwan, Marjoni Imamora Ali Umar, Aini Ayuni Mohd Raub, Jumril Yunas, Azrul Azlan Hamzah, Dahyunir Dahlan, Mohd Yusri Abd Rahman, Akrajas Ali Umar.  (2023).  Photocatalytic activity and stability properties of porous TiO2 film as photocatalyst for methylene blue and methylene orange degradation.  - International Journal of Electrochemical Science.  1-8. 

Muhammad Nurdin, Muhammad Zakir Muzakkar, Maulidiyah Maulidiyah, Trisna Trisna, Zul Arham, La Ode Agus Salim, Irwan Irwan, Akrajas Ali Umar.  (2022).  High-Performance COD Detection of Organic Compound Pollutants using Sulfurized-TiO2/Ti Nanotube Array Photoelectrocatalyst.  - Electrocatalysis.  580-589. 

Muhammad Nurdin, Muhammad Zakir Muzakkar, Maulidiyah Maulidiyah, Trisna Trisna, Zul Arham, La Ode Agus Salim, Irwan Irwan, Akrajas Ali Umar.  (2022).  High-Performance COD Detection of Organic Compound Pollutants using Sulfurized-TiO2/Ti Nanotube Array Photoelectrocatalyst.  - Electrocatalysis.  580-589. 

Mohd Mustaqim Rosli, Tengku Hasnan Tengku Abdul Aziz, Majoni Imamora Ali Umar, Muhammad Nurdin, Akrajas Ali Umar.  (2022).  Propylene Glycol Directed Synthesis of Silver Nanowires for Transparent Conducting Electrode Application.  - Journal of Electronic Materials.  5150-5158. 

Marjoni Imamora Ali Umar, Setia Budi, Muhammad Nurdin, Akrajas Ali Umar.  (2022).  Synthesis of standing ZnO nanosheets and impact of Ag nanoparticles loading on its optical property.  - Bulletin of Materials Science.  1-6. 

J. Ridwan, J. Yunas, A.A. Umar, A.A. Mohd Raub, A.A. Hamzah, J. Kazmi A.B.D. Nandiyanto, R.E. Pawinanto, I. Hamidah.  (2022).  Vertically Aligned Cu-Doped ZnO Nanorods for Photocatalytic Activity Enhancement.  - International Journal of Electrochemical Science.  1-18. 

A.Y.A. Al-She'irey, M.Y.A. Rahman, A.A. Umar.  (2022).  Perovskite-sensitized solar cell utilizing TiO2 nanograss: Effect of dipping time of CH3NH3PbI3 perovskite.  - Journal of the Indian Chemical Society.  1-5. 

A Y A Al-She'irey, M Y A Rahman, M I A Umar, I Sugihartono, V Fauzia, A A Umar.  (2022).  Effect of potassium precursor concentration on the performance of perovskite-sensitized solar cells.  - Bulletin of Materials Science.  1-9. 

M.Y.A. Rahman, S.N. Sadikin, A.A. Umar.  (2022).  Dye-sensitized solar cells using zinc sulphide-coated titanium dioxide films as photoanode: Effect of immersion temperature on its performan.  - International Journal of Electrochemical Science.  1-11. 

Setia Budi, Wisnu Ari Adi, Yusmaniar, Zahra Fairuza, Imam Basori, Akrajas Ali Umar.  (2022).  Structural Analysis of Nanocrystalline Cu2O Prepared by Electrodeposition at Different Temperatures.  - International Journal of Electrochemical Sciences.  1-12. 

N.A.S. Aziz, M.Y.A. Rahman, A.A. Umar.  (2022).  Palladium selenide as cathode for dye-sensitized solar cell: Effect of palladium content.  - Solid-State Electronics.  1-5. 

N.A.S. Aziz, M.Y.A. Rahman, A.A. Umar.  (2022).  Comparative study of dye-sensitized solar cell utilizing selenium and palladium cathode.  - Journal of the Indian Chemical Society.  1-5. 

Marjoni Imamora Ali Umar, Akrajas Ali Umar.  (2021).  Synthesis of large-scale cadmium oxide nanowires from an aqueous solution.  - Journal of Electronic Materials.  5553-5556. 

Ummi Kalsom Noor Din, Muhamad Mat Salleh, Tengku Hasnan Tengku Aziz, Ahmad Rifqi Md Zain, Mohd. Ambri Mohamed, Akrajas Ali Umar.  (2021).  On the performance of polymer-inorganic perovskite oxide composite light-emitting diodes: The effect of perovskite SrTiO3 additives.  - Nanomaterials and Nanotechnology.  1-9. 

S.N. Sadikin, M.Y.A. Rahman, A.A. Umar.  (2020).  Influence of annealing temperature of TiO2-coated ZnS films on the performance of dye-sensitized solar cells.  - Optik.  1-9. 

Ari Sulistyo Rini, Yolanda Rati, Miranti Agustin, Yanuar Hamzah, Akrajas Ali Umar.  (2020).  Seed-mediated synthesis and photoelectric properties of selenium doped zinc oxide nanorods.  - Sains Malaysiana.  3055-3063. 

Dahyunir Dahlan, Nabilah Alias, Siti Khatijah Md Saad, Andhika Dwipanur Priya Utama, Muhamad Adam Ramli, Nurul Ain Abd Malek, Mohd Mustaqim Rosli, Nur Adliha Abdullah, Akrajas Ali Umar.  (2020).  Photoelectrical properties of anatase TiO2 with diferent morphologies under Au plasmonic effect.  - Applied Physics A.  1-10. 

Nurul Ain Abd Malek, Nabilah Alias, Akrajas Ali Umar, Xin Zhang, Xiaoguo Li, Siti Khatijah Md Saad, Nur Adliha Abdullah, Haijuan Zhang, Zhenhua Weng, Zejiao Shi, Chongyuan Li, Mohd Mustaqim Rosli, Yiqiang Zhan.  (2020).  Enhanced charge transfer in atom-thick 2H-WS2 nanosheets' electron transport layers of perovskite solar cells.  - Solar RRL.  1-11. 

U.A. Kamarulzaman, M.Y.A. Rahman, M.S. Suait, A.A. Umar.  (2020).  Effect of annealing treatment on multi-layers TiO2 films on the performance of dye-sensitized solar cells.  - Optik.  1-10. 

Rahmat Setiawan Mohar, Iwan Sugihartono, Vivi Fauzia, Akrajas Ali Umar.  (2020).  Dependence of optical properties of Mg-doped ZnO nanorods on Al dopant.  - Surface and Interfaces.  1-6. 

Elvy Rahmi Mawarnis, Akrajas Ali Umar.  (2019).  Fibrous bimetallic silver palladium and ruthenium palladium nanocrystals exhibit an exceptionally high active catalytic process in acetone hydrogenation.  - Materials Today Chemistry.  1-9. 

M.Y.A. Rahman, S.A.M. Samsuri, A.A. Umar.  (2019).  TiO2-SrTiO3 composite photoanode: effect of strontium precursor concentration on the performance of DSSC.  - APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING.  1-11. 

S.N. Sadikin, M.Y.A. Rahman, A.A. Umar, T.H.T. Aziz.  (2019).  Improvement of dye-sensitized solar cell performance by utilizing TiO2 coated graphene films photoanode.  - Superlattices and Microstructures.  92-98. 

S.N. Sadikin, M.Y.A. Rahman, A.A. Umar.  (2019).  Zinc sulphide-coated titanium dioxide films as photoanode for dye-sensitized solar cells: effect of immersion time on its performance.  - Superlattices and Microstructures.  153-159. 

Norhayati Abu Bakar, Akrajas Ali Umar, Muhamad Mat Salleh.  (2019).  Reka bentuk sensor pendar cahaya bintik kuantum zncdse untuk mengesan racun perosak.  - Sains Malaysiana.  1513-1518. 

Muhammad Nurdin, Owink Agung Prabowo, Zul Arham, Dwiprayogo Wibowo, Maulidiyah Maulidiyah, Siti Khatijah Md Saad, Akrajas Ali Umar.  (2019).  Highly sensitive fipronil pesticide detection on ilmenite (FeO.TiO2)-carbon paste composite electrode.  - Surfaces and Interfaces.  108-113. 

A.S. Sulaiman, M.Y.A. Rahman, A.A. Umar, M.M. Salleh.  (2018).  Dye-sensitized solar cell (DSSC) utilizing TiO2 nanostructure films: Effect of synthesis temperature.  - Russian Journal of Electrochemistry.  56-61. 

M.Y.A. Rahman, A.S. Sulaiman, A.A. Umar.  (2018).  Effect of annealing temperature of gold doped reduced graphene oxide counter electrode on the performance of dye-sensitized solar cell.  - International Journal of Electrochemical Science.  . 

Akrajas Ali Umar, Altaf Yahya Ahmed Al-She'irey, Mohd Yusri Abd Rahman, Muhamad Mat Salleh, Munetaka Oyama.  (2018).  Perovskite-sensitized solar cells-based Ga-TiO2 nanodiatom-like photoanode: the improvement of performance by perovskite crystallinity refinement.  - Applied Physics A: materials science and processing.  . 

M.Y.A. Rahman, S.N. Sadikin, A.A. Umar.  (2018).  TiO2-coated ZnS films as photoanode for dye-sensitized solar cell: Effect of zinc nitrate hexahydrate concentration on the performance.  - Applied Physics A: materials science and processing.  . 

M.Y.A. Rahman, A.S. Sulaiman, A.A. Umar.  (2018).  Dye-sensitized solar cell utilising gold doped reduced graphene oxide counter electrode: influence of annealing time.  - Micro & Nano Letters.  . 

M.Y.A. Rahman, L. Roza, S.A.M. Samsuri, A.A. Umar.  (2018).  Effect of N719 dye dipping temperature on the performance of dye-sensitized solar cell.  - Russian Journal of Electrochemistry.  . 

Elvy Rahmi Mawarnis, Akrajas Ali Umar, Masahiko Tomitori, Aamna Balouch, Muhammad Nurdin, Muhammad Zakir Muzakkar, Munetaka Oyama.  (2018).  Hierarchical bimetallic AgPt nanoferns as high-performance catalysts for selective acetone hydrogenation to isopropanol.  - ACS Omega.  . 

M.Y.A. Rahman, A.S. Sulaiman, A.A. Umar.  (2018).  Dye-sensitized solar cell utilizing gold doped reduced graphene oxide films counter electrode.  - Journal of New Materials for Electrochemical Systems.  . 

Aishah Khalid, Mohd Ambri Mohamed & Akrajas Ali Umar.  (2017).  Graphene Growth at Low Temperatures using RF-Plasma Enhanced Chemical Vapour Deposition.  - Sains Malaysiana.  1111-1117. 

N.A. Sadikin, M.Y.A. Rahman, A.A. Umar.  (2017).  TiO2-BaTiO3 composite films as photoanode for dye sensitized solar cell: Effect of BaTiO3 content.  - Journal of New Materials for Electrochemical Systems.  109-113. 

Akrajas Ali Umar, Fera Anggelina, Siti Khatijah Md Saad, Mohd.Yusri Abd. Rahman, Iwantono Iwantono.  (2017).  Influence of Ag ion adsorption on the photoactivity of ZnO nanorods for dye-sensitized solar cell application.  - Materials Express.  312-318. 

Akrajas Ali Umar, Siti Khatijah Md Saad and Muhamad Mat Salleh.  (2017).  Scalable Mesoporous Platinum Diselenide Nanosheet Synthesis in Water.  - ACS Omega.  3325-3332. 

Dahyunir Dahlan, Siti Khatijah Md Saad, Ade Usra Berli, Abdil Bajili, Akrajas Ali Umar.  (2017).  Synthesis of two-dimensional nanowall of Cu-Doped TiO2 and its application as photoanode in DSSCs.  - Physica E.  185-189. 

M.Y.A. Rahman, L. Roza, S.A.M. Samsuri, A.A. Umar, M.M. Salleh.  (2017).  Dye-sensitized solar cell utilizing TiO2 films prepared via microwave irradiation technique: Effect of TiO2 synthesis time.  - Journal of New Materials for Electrochemical Systems.  59-64. 

S.N. Sadikin, M.Y.A. Rahman, A.A. Umar, M.M. Salleh.  (2017).  Effect of spin coating cycle on the properties of TiO2 thin film and performance of DSSC.  - International Journal of Electrochemical Science.  5529-5538. 

T.H.T. Aziz, M.M. Salleh, N.A. Bakar, A.A. Umar and M.Y.A. Rahman.  (2016).  Electroluminescence Enhancement of Polymer Light Emitting Diodes Through Surface Plasmons by Ag Nanoplates.  - Acta Physica Polonica A.  711. 

Iwantono Iwantono, Erni Widya Putri, Fitri Yenni Naumar, Fera Anggelina, Siti Khatijah Md Saad and Akrajas Ali Umar.  (2016).  Performance of Dye-Sensitized Solar Cell Utilizing Ga-ZnO Nanorods: Effect of Ga Concentration.  - International Journal of Electrochemical Science.  7499 - 7506. 

L. Roza, M.Y.A. Rahman, A.A. Umar, M.M. Salleh.  (2016).  Multi-cycle growth of boron doped ZnO films as photoanode for dye-sensitized solar cell (DSSC).  - International Journal of Electrochemical Science.  10965-10977. 

M.Y.A. Rahman, A.A. Umar, L. Roza, M.M. Salleh.  (2015).  Morphological, optical, structural and photoelectrochemical properties of TiO2 nanostructure prepared via PVP surfactant assisted liquid phase deposition technique.  - Journal of Experimental Nanoscience.  925-936. 

Fitri Yenni Naumar, Akrajas Ali Umar, Muhamad Mat Salleh, Marjoni Imamora Ali Umar and Mohd. Yusri Abd. Rahman.  (2015).  Polythiopene sodium poly [2-(3-thienyl)-ethoxy-4-buthylsulfonate] Inkjet Printed Film-Sensitized ZnO Nanorods Solar Cells.  - International Journal of Electrochemical Science.  445-455. 

Nafisah S., Saad S.K.M., Umar A.A., Plucinski K., Lis M., Maciaga A., Miedzinski R..  (2015).  Laser stimulated nonlinear optics of Ag nanoparticle-loaded poriferous TiO2 microtablet.  - Optica Applicata.  263-271. 

M.Y.A. Rahman, A.A. Umar, R. Taslim, M.M. Salleh.  (2015).  Effect of surfactant on the physical properties of ZnO nanorods and the performance of ZnO photoelectrochemical cell.  - Journal of Experimental Nanoscience.  599-609. 

M.Y.A. Rahman, A.A. Umar, L. Roza, S.A.M. Samsuri, M.M. Salleh, I. Iwantono, Tugirin.  (2015).  Effect of growth solution concentration on the performance of boron doped ZnO dye-sensitized solar cell (DSSC).  - Journal of New Materials for Electrochemical Systems.  213-218. 

M.Y.A. Rahman, A.A. Umar, S.K.M. Saad, M.M. Salleh, A. Ishaq.  (2014).  Effect of dye on the performance of nitrogen doped TiO2 solar cell prepared via ammonia treated liquid phase depostion technique.  - Journal of New Materials for New Electrochemical Systems.  17(1):33-37. 

Iqbal, J., Tabassum, H., Ahmad, I., Jan, T., Dee, C.F., Madhuku, M., Umar, A.A., Ahmad, N.  (2014).  Carbon ion-beam-induced modification in structural and electrical properties of ZnO nanowires.  - Sains Malaysina.  283-287. 

M.Y.A. Rahman, A.A. Umar, L. Roza, M.M. Salleh.  (2014).  Effect of organic dye on the performance of dye-sensitized solar cell utilizing TiO2 nanostructure films synthesized via CTAB-assisted liquid phase deposition technique.  - Russian Journal of Electrochemistry.  1072-1076. 

M.Y.A. Rahman, A.A. Umar, L. Roza, M.M. Salleh.  (2014).  Morphology, structure, optical property and photoelectrochemical property of TiO2 nanoflower films synthesized via liquid phase deposition technique.  - Micro & Nano Letters.  9(4):253-256. 

M.Y.A. Rahman, A.A. Umar, L. Roza, M.M. Salleh.  (2014).  Effect of hexamethylenetetramines (HMT) surfactant concentration on the performance of TiO2 nanostructure photoelectrochemical cellS.  - Russian Journal of Electrochemistry.  974-980. 

M. Imperiyka, A. Ahmad, S.A. Hanifah, A.A. Umar, N.S. Mohamed, M.Y.A. Rahman.  (2014).  Photo-polymerization of methacrylate based polymer electrolyte for dye-sensitized solar cell.  - Journal of Polymer Engineering.  695-702. 

Sin Tee Tan, N.S.AlZayed, G.Lakshminarayan, F.Naumar , A.A.Umar, M.Oyama,G. Myronchuk, I.V.Kityk.  (2014).  Laser stimulated electrooptics in the Ag-ZnO nanorods.  - Physica E.  23-27. 

Muhammad Shahid, Muhammad Akhyar Farrukh, Akrajas Ali Umar, and Muhammad Khaleeq ur Rahman.  (2014).  Solvent Controlled Synthesis of CaO-MgO Nanocomposites and Their Application in the Photodegradation of Organic Pollutants of Industrial Waste.  - Russian Journal of Physical Chemistry A.  842-850. 

A. H.Reshak, Sin Tee Tan, Fitri Yeni Naumar, A.A.Umar, M.Oyama, Z. A. Alahmed,H. Kamarudin, I.V.Kityk.  (2014).  Photoinduced Nonlinear Optical Second-Order Optical Effects in the Ag-ZnO Nanorods.  - International Journal of Electrochemical Science.  6352-6358. 

Reza Zamiri, Hamid-Reza Bahari-Poor, Azmi Zakaria, Raheleh Jor, Golnoosh Zamiri, Avito Rebelo, Akrajas Ali Umar.  (2013).  Upconversion properties of the Er-doped Y2o3, Bi2o3 and Sb2o3 nanoparticles fabricated by pulsed laser ablation in liquid media.  - Chinese Physics Letters.  Art no.118103. 

Aamna Balouch, Akrajas Ali Umar, Sin Tee Tan, Suratun Nafisah, Siti Khatijah Md Saad, Muhamad Mat Salleh and Munetaka Oyama.  (2013).  Fibrous, ultra-small nanorod-constructed platinum nanocubes directly grown on the ITO substrate and their heterogeneous catalysis application.  - RSC Advances.  2013(3):19789. 

Ishaq, A , Iqbal, S., Ali, N., Khurram, A.A., Akrajas, A.U., Dee, C.F., Naseem, S., Rafique, H.M., Long, Y.  (2013).  H+, N+, and Ar+ ion irradiation induced structure changes of carbon nanostructures.  - New Carbon Materials.  81-87. 

A. A. Umar, Ali H. Reshak, M. Oyama, K. J. Plucinski.  (2012).  Fluorescent and nonlinear optical features of CdTe quantum dots.  - Journal of Materials Science: Materials in Electronics.  23:546-550. 

V. Fauzia, A.A. Umar, M.M. Salleh and M. Yahaya.  (2012).  Thermal Annealing Effect on the Morphology of Inkjet Printed Polymer:Fullerene Composites Solar Cells.  - Acta Physica Polonica A.  121:155-158. 

Tahir, SFBM; Ramli, N; Izzuddin, I; Salleh, MM; Yahaya, M; Umar, AA; Jumali, MHH.  (2012).  Effect of ZnO addition on structural properties of ZnO-PANi/carbon black thin films.  - Sains Malaysiana.  41(8):1001-1004. 

G. HUSNAIN, ISHAQ AHMAD, SHU-DE YAO, H. M. RAFIQUE, AKRAJAS ALI UMAR and CHANG FU DEE.  (2012).  Depth-dependent tetragonal distortion study of AlGaN epilayer thin film using rbs and channeling technique.  - Modern Physics Letters B.  26(14):Art 1250086. 

M. Y. A. Rahman, A. A. Umar, L. Roza & M. M. Salleh.  (2012).  Effect of TiO2 nanostructure morphology on the performance of a photoelectrochemical cell of ITO/TiO2/electrolyte/platinum.  - Journal of Solid State Electrochemistry.  16:3947-3952. 

Fui, M.L.W., Hang, N.K., Minggu, L.J., Umar, A.A., Kassim, M.B..  (2012).  Determination of band energy levels for tungsten nitrosyldithiolene [Penentuan aras jalur tenaga kompleks tungsten nitrosilditiolena].  - Sains Malaysiana.  41(4):439-444. 

Sri Nengsih, Akrajas Ali Umar, Muhamad Mat Salleh & Muhammad Yahaya.  (2011).  Detection of volatile organic compound gas using localized surface plasmon resonance of gold nanoparticles.  - Sains Malaysiana.  40(3):231-235. 

Munetaka Oyama, Akrajas Ali Umar, Muhamad Mat Salleh & Burhanuddin Yeop Majlis.  (2011).  Chemical synthesis of metal nanoparticles in aqueous solutions with the presence of some additives.  - Sains Malaysiana.  40(12):1345-135. 

Umar, AA; Salleh, MM; Majlis, BY; Oyama, M.  (2011).  Formation of High-Density Crystalline-Shape Gold Nanoparticles on Indium Tin Oxide Surfaces: Effects of Alcohothermal Seeding.  - Journal of Nanoscience and Nanotechnology.  11(6):4974-4980. 

Rika Taslim, M. Y. A. Rahman, M. M. Salleh, A. Ali Umar, A. Ahmad.  (2010).  Fabrication of a nanoparticle TiO2 photoelectrochemical cell utilizing a solid polymeric electrolyte of PAN-PC-LiClO4.  - Ionics.  16:639?644. 

Norhayati Abu Bakar, Akrajas Ali Umar*, Muhamad Mat Salleh & Muhammad Yahaya.  (2010).  Synthesis of CdTe-CdSe Core-Shell Quantum Dots with Luminescence in the Red.  - Sains Malaysiana.  39(3): 473-477. 

Rika, M. Y. A. Rahman, M. M. Salleh, A. A. Umar, A. Ahmad.  (2010).  Effect of ionic conductivity of a PAN-PC-LiClO4 solid polymeric electrolyte on the performance of a TiO2 photoelectrochemical cell.  - Journal of Solid State Electrochemistry.  14:2089-2093. 

Supriyanto, A., Triyana, K., Roto, Kusminarto, Salleh, M.M., Umar, A.A..  (2009).  Fabrication and performance studies of TiO2 and Porphyrin Heterojunction based organic photodetector.  - Journal of Optoelectronics and Advanced Materials.  11(11):1760-1764.