poh choon ooi m.f.mohd. razip wee chang fu dee chi chin yap muhammad mat salleh burhanuddin yeop majlis.  (2018).  fabrication of transparent bistable switching memory device using plasmapolymerized hexamethyldisiloxane layers with embedded graphene quantum dots.  - thin solid films.  45-50. 

md saad, s.k., ali umar, a., ali umar, m.i., tomitori, m., abd rahman, m.y., mat salleh, m., oyama, m..  (2018).  two-dimensional, hierarchical ag-doped tio2 nanocatalysts: effect of the metal oxidation state on the photocatalytic properties.  - acs omega.  . 

noor far'ain md noor, muhammad ashraf saiful badri, muhamad mat salleh & akrajas ali umar.  (2018).  synthesis of white fluorescent pyrrolic nitrogen-doped graphene quantum dots.  - optical materials.  . 

marjoni imamora ali umar, fitri yenni naumar, muhamad mat salleh & akrajas ali umar.  (2018).  hydrothermally grown of well-aligned znonrs: dependence of alignment ordering upon precursor concentration.  - journal of materials sciences: materials in electronics.  . 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh, mohammad hafizuddin hj jumali.  (2017).  solution-dispersed cuo nanoparticles as anode buffer layer in inverted type hybrid organic solar cells.  - physica status solidi a.  1-7. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, muhamad mat salleh.  (2017).  effect of thermal reduction temperature on the optical and electrical properties of multilayer graphene.  - journal of materials science: materials in electronics.  1038-1041. 

marlia morsin, muhamad mat salleh, akrajas ali umar and mohd zainizan sahdan.  (2017).  gold nanoplates for a localized surface plasmon resonance-based boric acid sensor.  - sensors.  947-955. 

s.a.m. samsuri, m.y.a. rahman, a.a. umar, m.m. salleh.  (2017).  influence of zno growth temperature on the performance of dye-sensitized solar cell utilizing tio2-zno composite films photoanode.  - ionics.  3533-3544. 

teck-yaw tiong, chang-fu dee, azrul azlan hamzah, boon tong goh, yuan-yee wong, lia ooi, burhanuddin yeop majlis, muhamad mat salleh, ishaq ahmad.  (2017).  a rapid responding ultraviolet sensor based on multi-parallel aligned zno nanowires field effect transistor.  - sensors and actuators a: physical.  139-145. 

muhammad ashraf saiful badri, muhamad mat salleh, noor far`ain md noor, mohd yusri abd rahman, akrajas ali umar.  (2017).  green synthesis of few-layered graphene from aqueous processed graphite exfoliation for graphene thin film preparation.  - materials chemistry and physics.  212-219. 

m.y.a. rahman, a.s. sulaiman, a.a. umar, m.m. salleh.  (2017).  dye-sensitized solar cell (dssc) utilizing graphene films counter electrode: effect of graphene oxide (go)content.  - journal of materials science: materials in electronics.  1674-1678. 

athar ali shah, akrajas ali umar, muhamad mat salleh.  (2016).  efficient quantum capacitance enhancement in dssc by gold nanoparticles plasmonic effect.  - electrochimica acta.  134-142. 

airul azha abd rahman, akrajas ali umar, xiaomei chen, muhamad mat salleh and munetaka oyama.  (2016).  enhanced thermoelectric properties of bismuth telluride-organic hybrid films via graphene doping.  - applied physics a: materials science and processing.  1-8. 

sin tee tan, akrajas ali umar and muhamad mat salleh.  (2016).  synthesis of defect-rich, (001) faceted-zno nanorod on a fto substrate as efficient photocatalysts for dehydrogenation of isopropanol to acetone.  - journal of physics and chemistry of solids.  73-78. 

altaf yahya ahmed al-she`irey, siti khatijah md saad, akrajas ali umar, mohd yusri abd rahman and muhamad mat salleh.  (2016).  (001) faceted-ga-tio2 microtablet synthesis and its organic perovskite sensitized solar cells characterization.  - journal of alloys and compounds.  470-476. 

u.k.n. din, m.m. salleh, t.h.t. aziz and a.a. umar.  (2016).  composition dependence of photoluminescence properties of poly(9,9-di-n-hexylfluorenyl-2,7-diyl) with perovskite structured srtio3 nanocomposites.  - superlattices and microstructures.  153-156. 

u.k.n. din, t.h.t. aziz, m.m. salleh, and a.a. umar.  (2016).  synthesis of crystalline perovskite-structured srtio3 nanoparticles using an alkali hydrothermal process.  - international journal of minerals, metallurgy and materials.  109-115. 

l. roza, m.y.a. rahman, a.a. umar, m.m. salleh.  (2016).  boron doped zno films for dye-sensitized solar cell (dssc): effect of annealing temperature.  - journal of materials science: materials in electronics.  8394-8401. 

sin tee tan, chun hui tan, wu yi chong, chi chin yap, akrajas ali umar, riski titian ginting, hock beng lee, kok sing lim, muhammad yahaya, muhamad mat salleh.  (2016).  microwave-assisted hydrolysis preparation of highly crystalline zno nanorod array for room temperature photoluminescence-based co gas sensor.  - sensors and actuators b: chemical.  304-312. 

xiaomei chen, aamna balouch, akrajas ali umar, muhamad mat salleh and munetaka oyama.  (2016).  fibrous platinum nanocubes modified indium tin oxide electrodes for effective electrooxidation of alcohols and sensitive detection of hydrazine.  - journal of electroanalytical chemistry.  156-160. 

m.y.a. rahman, l. roza, a.a. umar, m.m. salleh.  (2016).  effect of dimethyl borate composition on the performance of boron doped zno dye-sensitized solar cell (dssc).  - journal of materials science: materials in electronics.  2228-2234. 

chung-ming chu, yueh-chin lin, wei-i lee, chang fu dee, yuen-yee wong, burhanuddin yeop majlis, muhamad mat salleh, seong ling yap, and edward yi chang.  (2016).  reliability study of high-k la2o3/hfo2 and hfo2/la2o3 stacking layers on n-in0.53ga0.47as metal-oxide-semiconductor capacitor.  - applied physics express (apex).  21203. 

elvy rahmi, akrajas ali umar, mohd yusri abd rahman, muhamad mat salleh and munetaka oyama.  (2016).  fibrous aupt bimetallic nanocatalyst with enhanced catalytic performance.  - rsc advances.  27696-27705. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, mohammad hafizuddin haji jumali, muhamad mat salleh.  (2016).  optimizing the performance of inverted type hybrid organic solar cell based on zno/p3ht with various polymer deposition parameters.  - journal of materials science: materials in electronics.  10442-10448. 

tan s.t., ali umar a., salleh m.m..  (2015).  (001)-faceted hexagonal zno nanoplate thin film synthesis and the heterogeneous catalytic reduction of 4-nitrophenol characterization.  - journal of alloys and compounds.  299-304. 

siti khatijah md saad, akrajas ali umar, mohd. yusri abd. rahman, muhamad mat salleh.  (2015).  porous zn-doped tio2 nanowall photoanode: effect of zn2+ concentration on the dye-sensitized solar cell performance.  - applied surface science.  835-842. 

m.y.a. rahman, l. roza, a.a. umar, m.m. salleh.  (2015).  effect of acid boric composition on the properties of zno thin film nanotubes and the performance of dye-sensitized solar cell (dssc).  - journal of alloys and compounds.  86-91. 

s.a.m. samsuri, m.y.a. rahman, a.a. umar, m.m. salleh.  (2015).  synthesis and characterization of tio2-zno core-shell nanograss hetero-structure and its application in dye-sensitized solar cell (dssc).  - journal of materials science: materials in electronics.  4936-4943. 

eng liang lim, chi chin yap, muhammad yahaya, muhamad mat salleh, mohammad hafizuddin haji jumali.  (2015).  zno nanorod arrays pre-coated with dcjtb dye for inverted type hybrid solar cells incorporating p3ht donor.  - journal of materials science: materials in electronics.  719-725. 

aamna balouch, akrajas ali umar, elvy rahmi mawarnis, siti khatijah md saad, muhamad mat salleh, mohd yusri abd rahman, i. v. kityk, and munetaka oyama.  (2015).  synthesis of amorphous platinum nanofibers directly on an ito substrate and its heterogeneous catalytic hydrogenation characterization.  - acs applied materials and interfaces.  7776-7785. 

s.a.m. samsuri, m.y.a. rahman, a.a. umar, m.m. salleh.  (2015).  effect of zno growth time on the performance of dye-sensitized solar cell utilizing tio2-zno core-shell nanograss hetero-structure.  - materials letters.  388-391. 

l. roza, m.y.a. rahman, a.a. umar, m.m. salleh.  (2015).  direct growth of oriented zno nanotubes by self-selective etching at lower temperature for photo-electrochemical (pec) solar cell application.  - journal of alloys and compounds.  153-158. 

i. iwantono, w. nurwidya, l.r. lestari, f.y. naumar, s. nafisah, a.a. umar, m.y.a. rahman, m.m. salleh.  (2015).  effect of growth temperature and time on zno films properties and the performance of dye-sensitized solar cell (dssc).  - journal of solid state electrochemistry.  1217-1221. 

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. 

s.a.m. samsuri, m.y.a. rahman, a.a. umar, m.m. salleh.  (2015).  effect of zinc acetate dihydrate precursor concentration on the properties of tio2-zno core-shell nanograss hetero-structure.  - journal of alloys and compounds.  460-465. 

akrajas ali umar, suratun nafisah, siti khatijah md saad, sin tee tan, aamna balouch, muhamad mat salleh, munetaka oyama.  (2014).  poriferous microtablet of anatase tio2 growth on an ito surface for high-efficiency dye-sensitized solar cells.  - solar energy materials & solar cells.  122: 174-182. 

sin tee tan, akrajas ali umar, aamna balouch, muhammad yahaya, chi chin yap,muhamad mat salleh, munetaka oyama.  (2014).  zno nanocubes with (101) basal plane photocatalyst prepared via a low-frequency ultrasonic assisted hydrolysis process.  - ultrasonics sonochemistry.  21:754-760. 

chang fu dee, su kong chong, saadah abdul rahman, fatin saiha omar, nay ming huang, burhanuddin yeop majlis and muhamad mat salleh.  (2014).  hierarchical si/zno trunk-branch nanostructure for photocurrent enhancement.  - nanoscale research letters.  469. 

marjoni imamora ali umara, chi chin yap, rozidawati awang, muhamad mat salleh, muhammad yahaya.  (2014).  the effect of spin-coated polyethylene glycol on the electrical and optical properties of graphene film.  - applied surface science.  883-887. 

akrajas ali umar, elvy rahmi, aamna balouch, mohd yusri abd rahman, muhamad mat salleh and munetaka oyama.  (2014).  highly-reactive agpt nanofern composed of {001}-faceted nanopyramidal spikes for enhanced heterogeneous photocatalysis application.  - journal of materials chemistry a.  17655-17656. 

md saad s.k., ali umar a., quan nguyen h., fu dee c., mat salleh m., oyama m..  (2014).  porous (001)-faceted zn-doped anatase tio2 nanowalls and their heterogeneous photocatalytic characterization.  - rsc advances.  57054 - 57063. 

m.y.a. rahman, a. ahmad, a.a. umar, r. taslim, m.s. su`ait, m.m. salleh.  (2014).  polymer electrolyte for photoelectrochemical cell and dye-sensitized solar cell:a brief review.  - ionics.  1201-1205. 

sin tee tan, akrajas ali umar, aamna balouch, suratun nafisah, muhammad yahaya, chi chin yap, muhamad mat salleh, i. v. kityk and munetaka oyama.  (2014).  ag-zno nanoreactor grown on fto substrate exhibiting high heterogeneous photocatalytic efficiency.  - acs combinatorial sciences.  314-320. 

riski titian ginting, chi chin yap, muhammad yahaya, and muhammad mat salleh.  (2014).  solution-processed ga-doped zno nanorod arrays as electron acceptors in organic solar cells.  - acs applied materials & interfaces.  5308-5318. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2014).  improvement of inverted type organic solar cells performance by incorporating mg dopant into hydrothermally grown zno nanorod arrays.  - journal of alloys and compounds.  585:696-702. 

noor j. ridha, akrajas ali umar, f. alosfur,mohammad hafizuddin haji jumali, and muhamad mat salleh.  (2013).  microwave assisted hydrothermal method for porous zinc oxide nanostructured-films.  - journal of nanoscience and nanotechnology.  2667-2674. 

vivi fauzia, akrajas ali umar, muhamad mat salleh and muhammad yahaya.  (2013).  effect of gold nanoparticles density grown directly on the surface on the performance of organic solar cell.  - current nanoscience.  9:187-191. 

aamna balouch, akrajas ali umar, athar ali shah, muhamad mat salleh and munetaka oyama.  (2013).  efficient heterogeneous catalytic hydrogenation of acetone to isopropanol on semihollow and porous palladium nanocatalyst.  - acs applied materials and interface.  5:9843-9849. 

a.a. umara, m.y.a. rahman, s.k.m. saad, m.m. salleh, m. oyama.  (2013).  preparation of grass-like tio2 nanostructure thin films: effect of growth temperature.  - applied surface science.  270:109- 114. 

rahman, m. y. a.; umar, a. a.; taslim, r.; salleh, m. m..  (2013).  effect of organic dye, the concentration and dipping time of the organic dye n719 on the photovoltaic performance of dye-sensitized zno solar cell prepared by ammonia-assisted hydrolysis technique.  - electrochimica acta.  88:639-643. 

al-asbahi, b.a., jumali, m.h.h., yap, c.c., salleh, m.m., alsalhi, m.s..  (2013).  inhibition of dark quenching by tio2 nanoparticles content in novel pfo/fluorol 7ga hybrid: a new role to improve oled performance.  - chemical physics letters.  570:109-112. 

bandar ali al-asbahi, mohammad hafizuddin haji jumali, chi chin yap, muhamad mat salleh..  (2013).  influence of tio2 nanoparticles on enhancement of optoelectronic properties of pfo-based light emitting diode.  - journal of nanomaterials.  1-7. 

sin tee tan, akrajas ali umar, muhammad yahaya, muhamad mat salleh, chi chin yap, hong-quan nguyen, chang-fu dee, edward yi chang, and munetaka oyama.  (2013).  formation of a multi-arm branched nanorod of zno on the si surface via a nanoseed-induced polytypic crystal growth using the hydrothermal method.  - science of advanced materials.  5:803-809. 

nasehah syamin sabri, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  influence of organic salt concentration on the performance of bulk heterojunction organic solar cell.  - journal of materials science: materials in electronics.  24(7):2183-2188. 

bandar ali al-asbahi, mohammad hafizuddin haji jumali, chi chin yap, moayad husein flaifel, muhamad mat salleh..  (2013).  photophysical properties and energy transfer mechanism of pfo/fluorol 7ga hybrid thin films.  - journal of luminescence.  57-65. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, mohammad hafizuddin hj jumali, muhamad mat salleh, muhammad yahaya.  (2013).  characterization of multilayer graphene prepared from short-time processed graphite oxide flake.  - journal of materials science: materials in electronics.  24(4):1282-1286. 

m.y.a. rahman, a.a. umar, r. taslim, m.m. salleh.  (2013).  effect of ammonia and zinc acetate precursor concentration on the morphology of zno nanorods and the performance of a zno photo-electrochemical cell.  - current nanoscience.  9(6):730-736. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  meh-ppv and pcbm solution concentration dependence of inverted-type organic solar cells based on eosin-y-coated zno nanorod arrays.  - international journal of photoenergy.  2013:Article ID 503715. 

eng liang lim, chi chin yap, muhammad yahaya and muhamad mat salleh.  (2013).  enhancement of zno nanorod arrays-based inverted type hybrid organic solar cell using spin-coated eosin-y.  - semiconductor science and technology.  28(4):Art no.045009. 

riski titian ginting, chi chin yap, muhammad yahaya, muhamad mat salleh.  (2013).  influence of poly(2-methoxy-5-(2`-ethyl)-hexyloxy-p-phenylene vinylene):(6,6)-phenyl c61 butyric acid methyl ester blend ratio on the performance of inverted type organic solar cells based on.........  - thin solid films.  536:286-290. 

marjoni imamora ali umar, chi chin yap, rozidawati awang, akrajas ali umar, muhamad mat salleh, muhammad yahaya.  (2013).  formation of gold-coated multilayer graphene via thermal reduction.  - materials letters.  106:200-203. 

sri nengsih, akrajas ali umar, muhamad mat salleh and munetaka oyama.  (2012).  detection of formaldehyde in water: a shape-effect on the plasmonic sensing properties of the gold nanoparticles.  - sensors.  12(8):10309-10325. 

akrajas ali umar, iwantono iwantono, ariyanto abdullah, muhamad mat salleh and munetaka oyama.  (2012).  gold nanonetwork film on the ito surface exhibiting one-dimensional optical properties.  - nanoscale research letters.  7:252. 

a.a. umar, m.y.a. rahman, r. taslim, m.m. salleh, m. oyama.  (2012).  effect of the thickness of quasi one-dimensional zinc oxide nanorods synthesized via multiple growth process under ammonia assisted hydrolysis technique on the performance of dye-sensitized solar cell.  - international journal of electrochemical science.  7(9):8384-8393. 

akrajas ali umar, mohd yusri abd rahman, siti khatijah md saad, muhamad mat salleh.  (2012).  effect of nh3 concentration on the performance of nitrogen doped tio2 photoelectrochemical cell.  - international journal of electrochemical science.  7(9):7855-7865. 

a. a. umar, mya rahman, r. taslim, m. m. salleh.  (2012).  dye-sensitized solar cell utilizing quasi one-dimensional of highly compact vertical array zno nanorod.  - international journal of electrochemical science.  7:7253-7260. 

jumali, m.h.h., al-asbahi, b.a., yap, c.c., salleh, m.m., alsalhi, m.s..  (2012).  optoelectronic property enhancement of conjugated polymer in poly(9,9-di-n-octylfluorenyl-2.7-diyl)/titania nanocomposites.  - thin solid films.  524:257-262. 

m. y. a. rahman, a. a. umar, l. roza, m. m. salleh.  (2012).  effect of optical property of surfactant-treated tio2 nanostructure on the performance of tio2 photo-electrochemical cell.  - journal of solid state electrochemistry.  16:2005-2010. 

akrajas ali umar, munetaka oyama, muhamad mat salleh, burhanuddin yeop majlis.  (2012).  silver nanocombs and branched nanowires formation in aqueous binary surfactants solution.  - journal of nanoparticles research.  14(7):1001. 

c.c. yap, m. yahaya & m.m. salleh.  (2011).  effect of organic salt doping on the performance of single layer bulk heterojunction organic solar cell.  - solar energy.  85(1):95-99. 

akrajas ali umar, mohd yusri abd rahman, rika taslim, muhamad mat salleh and munetaka oyama.  (2011).  a simple route to vertical array of quasi-1d zno nanofilms on fto surfaces: 1d-crystal growth of nanoseeds under ammonia-assisted hydrolysis process.  - nanoscales research letters.  6:Art. No 564. 

akrajas ali umar, munetaka oyama, muhamad mat salleh, and burhanuddin yeop majlis.  (2010).  formation of highly thin, electron-transparent gold nanoplates from nanoseeds in ternary mixtures of cetyltrimethylammonium bromide, poly(vinyl pyrrolidone), and poly(ethylene glycol).  - crystal growth and design.  10(8):3694-3698. 

rahman, mya; ahmad, a; ismail, lhc; salleh, mm.  (2010).  fabrication and characterization of a solid polymeric electrolyte of pan-tio2-liclo4.  - journal of applied polymer science.  115(4):2144-2148. 

rika, rahman m.y.a., salleh m.m., umar a.a., ahmad a..  (2010).  effect of the grain size of nanoparticle dye-coated titanium dioxide on the short-circuit current density and open-circuit voltage of an indium tin oxide/titanium dioxide/poly(acrylonitrile)-propylene.  - journal of applied polymer science.  116(6):3278-3282. 

sepeai s., salleh m.m., yahaya m., umar a.a..  (2009).  improvement of white organic light emitting diode performances by an annealing process.  - thin solid films.  517(16):4679-4683. 

m.m. mazida, m.m. salleh & h. osman.  (2005).  analysis of volatile aroma compounds of fresh chilli (capsicum annuum) during stages of maturity using solid phase microextraction (spme).  - journal of food composition and analysis.  18:427-437.