m.y.a. rahman, a.a. umar, m.s. suait, a. ahmad, r. taslim, l. roza, s.k.m. saad, m.m. salleh.  (2016).  metal oxide nanostructure thin films for dye-sensitized solar cells (dsscs): a brief overview.  - international journal of electroactive materials.  8-13. 

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. 

l. roza, k.a.j. fairuzy, p. dewanta, a.a. umar, m.y.a. rahman, m.m. salleh.  (2015).  effect of molar ratio of zinc nitrate:hexamethylenetetramine on the properties of zno thin film nanorods and nanotubes and the performance of dye-sensitized solar cell (dssc).  - journal of materials science: materials in electronic.  7955-7966. 

muhamad bin mat salleh, muhammad bin yahaya, burhanuddin bin yeop majlis, akrajas ali umar.  (2015).  bahan mampan & teknologi hijau untuk peranti berkaitan tenaga.  - .  . 

akrajas ali umar, muhamad bin mat salleh, mohd yusri bin abd rahman, muhammad bin yahaya.  (2014).  growth of ultraporous platinum nanocrystal directly on ito substrate: investigation on the effect of sodium deocyl sulfate surfactant and formic acid reducingagent on the morphology and their applica….  - .  . 

yap chi chin, muhammad bin yahaya, mohammad hafizuddin bin jumali, muhamad bin mat salleh, rozidawati binti awang, akrajas ali umar.  (2014).  graphene thin film with enhanced electrical conductivity by chemical doping for organic solar cells.  - .  . 

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.