prof. madya dr. akrajas bin ali umar

pensyarah universiti

institut kejuruteraan mikro & nanoelektronik (imen)

 akrajas@ukm.edu.my

No. sambungan :  60389118547

No. rasmi:
UKM : 03 8921 5555



   Biografi/ Biography :

  • Dr. Akrajas Ali Umar received his PhD in Physics from the National University of Malaysia in 2004 in organic thin film for optical sensing application. He is currently Associate Professor in the Institute of Microengineering and Nanoelectronics (IMEN), the National University of Malaysia since 2011. His research interests are mainly in the field of Nanophysics and Nanomaterial Chemistry, particularly nanostructures design with controlled atomic composition, surface structure and morphology with emphasis on energy conversion applications. Prior to joining the National University of Malaysia, he has served as a lecturer at the Department of Physics, Universitas Andalas, Indonesia from 1997 to 2008. He has also served as Ministry of Science and Technology and Environment of Malaysia (MOSTE) Postdoctoral Fellow, at the National University of Malaysia in 2004, Kyoto University Venture Business Laboratory Postdoctoral Fellow (2004-2005) and Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellow in Kyoto University, Japan, from 2005-2007. He was World Class Professor of Ministry of Research, Science , Technology and higher Education of Indonesia (2018) and visiting scholar in Fudan University, China (2019-2020). Currently, he is a member of American Chemical Society USA and Institute of Electronics and Electrical Engineering USA. He has published more than 180 papers in high-impact factor journals with h-index as high as 29.

  • u.a. kamarulzaman, m.y.a. rahman, m.s. suait, a.a. umar.  (2021).  nickelpalladium alloy-reduced graphene oxide as counter electrode for dye-sensitized solar cells.  - journal of molecular liquids.  1-7. 

     

    muhamad adam ramli, elvy rahmi mawarnis, marjoni imamora ali umar, mohd yusri abd rahman, vivi fauzia, muhammad nurdin, akrajas ali umar.  (2021).  charge transfer uplift in dye-sensitized solar cells using fibrous nanocrystals of platinum-based bimetallic counter electrodes.  - surface and interfaces.  1-12. 

     

    marjoni imamora ali umar, dahyunir dahlan, muhammad nurdin, munetaka oyama, akrajas ali umar.  (2021).  two-dimensional crystal growth in zno nanostructures directed by poly vinylpyrrolidone.  - materials letters.  1-4. 

     

    anita eka putri, liszulfah roza, setia budi, akrajas ali umar, vivi fauzia.  (2021).  tuning the photocatalytic activity of nanocomposite zno nanorods by shape-controlling the bimetallic auag nanoparticles.  - applied surface science.  14784. 

     

    nabilah alias, akrajas ali umar,* nurul ain abd malek, kai liu, xiaoguo li, nur adliha abdullah, mohd mustaqim rosli, mohd yusri abd rahman, zejiao shi, xin zhang, haijuan zhang, fengcai liu, jiao wang, yiqiang zhan.  (2021).  photoelectrical dynamics uplift in perovskite solar cells by atoms thick 2d tis2 layer passivation of tio2 nanograss electron transport layer.  - acs applied materials and interfaces.  3051-3061. 

     

    muhamad adam ramli, elvy rahmi mawarnis, marjoni imamora ali umar, mohd yusri abd rahman, vivi fauzia, muhammad nurdin, akrajas ali umar.  (2021).  charge transfer uplift in dye-sensitized solar cells using fibrous nanocrystals of platinum-based bimetallic counter electrodes.  - surface and interfaces.  1-12. 

     

    u.a. kamarulzaman, m.y.a. rahman, m.s. suait, a.a. umar.  (2021).  nickelpalladium alloy-reduced graphene oxide as counter electrode for dye-sensitized solar cells.  - journal of molecular liquids.  1-7. 

     

    nabilah alias, akrajas ali umar,* nurul ain abd malek, kai liu, xiaoguo li, nur adliha abdullah, mohd mustaqim rosli, mohd yusri abd rahman, zejiao shi, xin zhang, haijuan zhang, fengcai liu, jiao wang, yiqiang zhan.  (2021).  photoelectrical dynamics uplift in perovskite solar cells by atoms thick 2d tis2 layer passivation of tio2 nanograss electron transport layer.  - acs applied materials and interfaces.  3051-3061. 

     

    anita eka putri, liszulfah roza, setia budi, akrajas ali umar, vivi fauzia.  (2021).  tuning the photocatalytic activity of nanocomposite zno nanorods by shape-controlling the bimetallic auag nanoparticles.  - applied surface science.  14784. 

     

    marjoni imamora ali umar, dahyunir dahlan, muhammad nurdin, munetaka oyama, akrajas ali umar.  (2021).  two-dimensional crystal growth in zno nanostructures directed by poly vinylpyrrolidone.  - materials letters.  1-4. 

     

    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. 

     

    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. 

     

    norhayati abu bakar, nur adliha abdullah, akrajas ali umar, muhamad mat salleh, joseph george shapter.  (2019).  effect of silver concentration towards formation of agpt nanofern films as sers substrates.  - fourth international conference on science and technology (materials science forum).  231-236. 

     

    norhayati abu bakar, muhamad mat salleh, akrajas ali umar and joseph george shapter.  (2018).  effect of surface density silver nanoplate films toward surface-enhanced raman scattering enhancement for bisphenol a detection.  - journal of physics: conference series (3rd international symposium on frontier of applied physics, isfap 2017). 

     

    liszulfah roza, i. iwantono, gusyeri andika, akrajas ali umar, mohd. yusri. abd rahman.  (2018).  effect of hexamethylenetetramine (hmt) concentration on the properties of boron doped zno nanotubes array films and the performance of dye-sensitized solar cell (dssc).  - international conference on engineering and technology (intcet 2017). 

     

    norshafadzila m.n., huda a., noor azwen n.a., akrajas a.u., aidil a.h., sahbudin s..  (2016).  fabrication and characterization of pani-ag-co nanocomposite thin films as microbial sensor for e. coli detection.  - materials science forum.  641-649. 

     

    iwan s., fauzia v., umar a.a., sun x.w..  (2016).  room temperature photoluminescence properties of zno nanorods grown by hydrothermal reaction.  - aip conference proceedings.  1-4. 

     

    norhayati abu bakar, nur adliha abdullah, akrajas ali umar, muhamad mat salleh, joseph george shapter.  (2019).  effect of silver concentration towards formation of agpt nanofern films as sers substrates.  - fourth international conference on science and technology (materials science forum).  231-236. 

     

    norhayati abu bakar, muhamad mat salleh, akrajas ali umar and joseph george shapter.  (2018).  effect of surface density silver nanoplate films toward surface-enhanced raman scattering enhancement for bisphenol a detection.  - journal of physics: conference series (3rd international symposium on frontier of applied physics, isfap 2017). 

     

    liszulfah roza, i. iwantono, gusyeri andika, akrajas ali umar, mohd. yusri. abd rahman.  (2018).  effect of hexamethylenetetramine (hmt) concentration on the properties of boron doped zno nanotubes array films and the performance of dye-sensitized solar cell (dssc).  - international conference on engineering and technology (intcet 2017). 

     

    norshafadzila m.n., huda a., noor azwen n.a., akrajas a.u., aidil a.h., sahbudin s..  (2016).  fabrication and characterization of pani-ag-co nanocomposite thin films as microbial sensor for e. coli detection.  - materials science forum.  641-649. 

     

    iwan s., fauzia v., umar a.a., sun x.w..  (2016).  room temperature photoluminescence properties of zno nanorods grown by hydrothermal reaction.  - aip conference proceedings.  1-4. 

     

    norhayati abu bakar, muhamad mat salleh dan akrajas ali umar.  (2015).  testing and measurement: techniques and applications.  - 34 dan 155-159. 

     

    mohammad b. kassim, lorna jeffery minggu, mohd hafizuddin haji jumali, akrajas, ali umar, siti fairus binti mohd yusoff, farah hannan anuar, khuzaimah arifin.  (2012).  progress in photoelectrochemical research 2012.  - 74. 

     

    norhayati abu bakar, muhamad mat salleh dan akrajas ali umar.  (2015).  testing and measurement: techniques and applications.  - 34 dan 155-159. 

     

    munetaka oyama, akrajas ali umar, jingdong zhang.  (2010).  advanced nanomaterials.  - Bab 8 hal. 297-318. 

     

    mohammad b. kassim, lorna jeffery minggu, mohd hafizuddin haji jumali, akrajas, ali umar, siti fairus binti mohd yusoff, farah hannan anuar, khuzaimah arifin.  (2012).  progress in photoelectrochemical research 2012.  - 74. 

     

    mohammad b. kassim, wan ramli wan daud, lorna jeffery minggu, kamaruzzaman sopian, mohd hafizuddin hj. jumali, akrajas ali umar, ibrahim n. hassan, siti fairus mohd yusoff, yap chi chin.  (2011).  progress in photoelectrochemical research 2011.  - 99. 

     

    tengku hasnan bin tengku abdul aziz;akrajas bin ali umar.  (2021).  reduced graphene oxide as electron buffer layer for organic light emitting diodes (oleds).  -

     

    akrajas bin ali umar;tengku hasnan bin tengku abdul aziz;mohd yusri bin abd rahman;mohd ambri bin mohamed.  (2021).  investigation of the role of atomic stoichiometry in moxwycu1-x-yx2 (x=s and se) nanosheets on their optoelectronic properties for high performance solar cells.  -

     

    abdul rahman bin mohmad;azrul azlan bin hamzah;tengku hasnan bin tengku abdul aziz;akrajas bin ali umar.  (2021).  metallic 2-dimensional 1t mos2 as electrode material for supercapacitors.  -

     

    mohd yusri bin abd rahman;akrajas bin ali umar.  (2021).  nickel sulfide-reduced graphene oxide composite film as counter electrode in dye-sensitized solar cell.  -

     

    akrajas bin ali umar;tengku hasnan bin tengku abdul aziz;mohd yusri bin abd rahman.  (2020).  high performance organometal halide perovskite solar cells utilizing high-surface energy (001) faceted anatase tio2 nanosheets.  -