naif h. al-hardan, muhammad azmi abdul hamid, mohd firdaus-raih, azman jalar, ain zafirah kamaruddin, lim kar keng, ensaf mohammed al-khalqi, naser m. ahmed.  (2024).  titanium dioxide ion-sensitive extended gate field effect transistor (isegfet): selective detection of potassium ions in artificial blood serum.  - journal of materials science: materials in electronics.  1-16. 

m.h. hamsan, a.a. azli, s.b. aziz, n.a. shamsuri, m.f.z. kadir, n.s. nazri, l.k. keng, h.f.m. zaid, m.f. shukur..  (2024).  characterization of methylcellulose based composite polymer electrolytes reinforced with reduced-graphene oxide.  - materials science & engineering b.  11731. 

n.ismail, a.atiqah, a.jalar, m.a.bakar, r.a.a.rahim, a.g.ismail, a.a.hamzah, l.k.keng.  (2022).  a systematic literature review: the effects of surface roughness on the wettability and formation of intermetallic compound layers in lead-free solder joints.  - journal of manufacturing processes.  68-85. 

ensaf mohammed alkhalqi, muhammad azmi abdul hamid, naif h. alhardan, lim kar keng, azman jalar.  (2022).  magnesium doped zno nanorod electrolyte-insulator-semiconductor (eis) sensor for detecting organic solvents..  - ieee sensors journal.  11783-11790. 

ensaf mohammed. al-khalqi, muhammad azmi abdul hamid, roslinda shamsudin, naif h. al-hardan, lim kar keng, azman jalar.  (2021).  zinc oxide nanorods electrolyte insulator semiconductor sensors for enhanced 2-methoxythanol selectivity.  - ieee sensors journal.  6234-6240. 

ain zafirah kamaruddin, lim kar keng, muhammad azmi abdul hamid, naif h. al-hardan, huda abdullah & ensaf mohammed al-khalqi.  (2023).  the characteristic of ph-sensing of potentiometric on zinc oxide and aluminium-doped zinc oxide nanostructures.  - sains malaysiana.  3253-3246. 

ensaf mohammed. al-khalqi, muhammad azmi abdul hamid, naif h. al-hardan, lim kar keng, azman jalar.  (2022).  magnesium-doped zno nanorod electrolyte insulator semiconductor (eis) sensor for detecting calcium ions.  - journal of materials science: materials in electronics.  1618-1630. 

muhamad hafiz bin hamsan, na halim, nsn saaya, nurul syakirah nazri , nor fatin adlina mohd salleh, szn demon , na shamsuri, mfz kadir, mf shukur, lim kar keng, nurul hanis binti aminuddin jafry, azlan abdul rahim.  (2024).  pembangunan penyimpanan tenaga hijau daripada selulosa bakteria selulosa metil dan kanji kentang.  - jurnal teknologi.  1-8. 

nor afian yusof, maharam mamat, lim kar keng, hamdzun haron, nazri muslim.  (2024).  leadership: rejabhad as an icon and the king of malaysian cartoonist.  - international journal of academic research in business and social sciences.  2862-2873. 

maharam mamat, nor afian yusof, lim kar keng, maisarah yaacob, daing zairi ma'arof, devendran ramachandran.  (2024).  boboiboy animation episode, care of the earth: managing solid waste with the 3r method.  - international journal of religion.  778-790. 

maharam mamat, maisarah yaacob, lim kar keng, nor afian yusof, daing zairi ma'arof, devendran ramachandran, muhammad hannan sayuti.  (2024).  enviromental education in children:3r practices in boboiboy animation.  - environmental and social management journal (revista de gestão social e ambiental).  1-21. 

naif h. al-hardan, muhammad azmi abdul hamid, mohd firdaus-raih, azman jalar, ain zafirah kamaruddin, lim kar keng, ensaf mohammed al-khalqi, naser m. ahmed.  (2024).  titanium dioxide ion-sensitive extended gate field effect transistor (isegfet): selective detection of potassium ions in artificial blood serum.  - journal of materials science: materials in electronics.  1-16. 

ensaf mohammed al-khalqi, muhammad azmi abdul hamid, roslinda shamsudin, naif h al-hardan, lim kar keng.  (2020).  the effect of various zno layer towards sensing performance as an electrolyte-insulator-semiconductor ph sensor.  - 30th regional conference of solid state science and technology, rcssst 2018.  37-44. 

a. atiqah, n. ismail, k.k. lim, a. jalar, m.a. bakar, m.a. maleque, r.a. ilyas, a.b.m. supian.  (2022).  recycling of plastics, metals, and their composites.  - .  15. 

lim kar keng.  (2024).  the asia universities summit 2024.  - the sun.  . 

muhammad hannan sayuti, lim kar keng & mashitoh yaacob.  (2024).  the relationship between religion and environmental: a scoping review.  - 7th international seminar on islamic civilization (isic 2024).  39. 

iszan hana binti kaharudin;mashitoh binti yaacob;mohd syuhaimi bin ab rahman;lim kar keng.  (2024).  ketidaksepadanan antara pengangguran dan kekosongan jawatan dalam pasaran buruh di malaysia: kajian kes graduan ukm.  - .  . 

atiqah binti mohd afdzaluddin;azman bin jalar @ jalil;maria binti abu bakar;lim kar keng.  (2024).  study on fiber treatment process of oil-palm based nanocellulose reinforced thermoplastic polyurethane for plastic encapsulation of biomedical sensor devices.  - .  . 

muhamad hafiz bin hamsan, nurul syakirah nazri, lim kar keng.  (2023).  society and renewable energy.  - .  1-18.