yang sing leong, mohd hadri hafiz mokhtar, mohd saiful dzulkefly zan, norhana arsad, mamun ibne reaz, ahmad ashrif a. bakar.  (2021).  optical-mechanical configuration of imaging operation for endoscopic scanner: a review.  - ieee access.  32705-32722. 

bakr ahmed taha, yousif al mashhadany, nur nadia bachok, ahmad ashrif a bakar, mohd hadri hafiz mokhtar, mohd saiful dzulkefly zan, norhana arsad.  (2021).  detection of covid-19 virus on surfaces using photonics: challenges and perspectives.  - diagnostics.  1-17. 

mohammed jawad ahmed alathari,yousif al mashhadany,mohd hadri hafiz mokhtar,norhafizah burham, mohd saiful dzulkefly bin zan,ahmad ashrif a bakar, norhana arsad.  (2021).  human body performance with covid-19 affectation according to virus specification based on biosensor techniques.  - sensors.  1-26. 

muhammad kashif, mohd hadri hafiz mokhtar, nur hidayah azeman, fazida hanim hashim, norhana arsad, abdulfatah a.g. abushagur, ahmad ashrif a. bakar.  (2021).  phase-interrogated surface plasmon resonance sensor based on laser feedback interferometry.  - optics and lasers in engineering.  1-7. 

bakr ahmed taha, yousif al mashhadany, mohd hadri hafiz mokhtar, mohd saiful dzulkefly bin zan and norhana arsad.  (2020).  an analysis review of detection coronavirus disease 2019 (covid-19) based on biosensor application.  - sensors.  1-29. 

mohd hafiz abu bakar, nur hidayah azeman, nadhratun naiim mobarak, mohd hadri hafiz mokhtar, ahmad ashrif a bakar.  (2020).  effect of active site modification towards performance enhancement in biopolymer k-carrageenan derivatives.  - polymers.  1-13. 

mohamed m. elgaud, mohd saiful dzulkefly zan, abdulfatah abushagur ghaith, ahmad ashrif a. bakar, norhana arsad, nani fadzlina naim and mohd hadri hafiz mokhtar.  (2019).  improving the signal-to-noise ratio of time domain fiber bragg grating sensor based on hybrid simplex and golay coding technique.  - ieee access.  89-98. 

wan baihaqi wan ab rahman, nur hidayah azeman,nur hasiba kamaruddin, p susthitha menon, arafat a shabaneh, mohd adzir mahdi, mohd hadri hafiz mokhtar, norhana arsad, ahmad ashrif a bakar.  (2019).  label-free detection of dissolved carbon dioxide utilizing multimode tapered optical fiber coated zinc oxide nanorice.  - ieee access.  . 

m. m. elgaud, ahmad ashrif a bakar, abdulfatah abushagur ghaith, nani fadzlina naim, norhana arsad, mohd hadri hafiz mokhtar, nur hidayah azeman, mohd saiful dzulkefly zan.  (2018).  pulse compressed time domain multiplexed fiber bragg grating sensor: a comparative study.  - ieee access.  .