Nashrul Fazli Mohd Nasir
Thumbnail Image
Preferred name
Nashrul Fazli Mohd Nasir
Official Name
Nashrul Fazli Mohd, Nasir
Alternative Name
Mohd Nasir, Nashrul Fazli
Nasir, Nashrul Fazli Bin Mohd
Mohamad Nasir, N. F.
Nasir, N. F.M.
Nashrul Fazli, M. N.
Mohd. Nasir, N. F.
Main Affiliation
Scopus Author ID
36625951700
Researcher ID
I-7607-2015

Research Output

Filters

12 5
43
Reset filters

Settings
Now showing 1 - 10 of 43
No Thumbnail Available
Publication

Influence of pre-sputtering technique on material properties of BST thin films for tunable microwave applications

2020 , F. W. Jamaluddin , M.F Abdul Khalid , A. S. Zoolfakar , M. H. Mamat , Nashrul Fazli Mohd Nasir

This paper focuses on the influence of pre-sputtering process on the material properties of RF sputtered Barium Strontium Titanate (BST) thin films. Ba0.5Sr0.5TiO3 thin films were synthesized on sapphire substrates via RF magnetron sputtering system for 2-, 3- and 4-hour deposition time. The samples were then post-annealed for 2 hours at 900 °C in conventional furnace and characterized using x-ray diffraction (XRD), atomic force microscopy (AFM), field emission scanning electron (FESEM) and energy dispersive x-ray (EDX). The AFM analysis revealed that the BST thin film of the 4-hour deposition time produces rougher surface due to larger grain size. All the XRD patterns observed to have intense (110) peaks, indicating the preferred orientation of the BST thin films. From the FESEM results, it is observed that the 3-hour deposited sample is denser and uniform compared to its 2-hour counterpart. However, the 4-hour deposited sample shows a non-uniform film. EDX analysis showed that the elemental composition of the 4-hour deposited sample is the closest to the ideal atomic concentration (at. %) of the BST thin film.

View
Thumbnail Image
Publication

Synthesizing and Optimization the Hydroxyapatite Based on Corbiculacea Seashells

2021-01-01 , Mohd Riza Mohd Roslan , Nashrul Fazli Mohd Nasir , Nur Farahiyah Mohammad , Cheng Ee Meng , Nasrul Amri Mohd Amin , Abdul Khalid M.F. , Mohd Zakimi Zakaria , Muhammad Mokhzaini Azizan , Muzammil Jusoh

Hydroxyapatite (HA) is one of the main components in bone which functions to enhance its cell regeneration. Synthetically produced HA, based on seashell resources has higher biocompatibility, and in high demand especially in bone tissue engineering. However, the secondary phase of HA production are calcium oxide and carbonate, which impedes its performance. HA is synthesized via wet chemical precipitation and optimization were done to obtain nearly pure HA by manipulating the pH value and sintering temperature. It is expected that the combination of these parameters will optimize the amount of secondary phase hence attained nearly stoichiometric or pure HA. HA powders were analyzed through Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectrometry (EDX).

View
Thumbnail Image
Publication

Regression Analysis of the Dielectric and Morphological Properties for Porous Nanohydroxyapatite/Starch Composites: A Correlative Study

2022-05-01 , Beh C.Y. , Cheng Ee Meng , Nashrul Fazli Mohd Nasir , Mohd Tarmizi E.Z. , Mohd Shukry Abdul Majid , Mohd Ridzuan Mohd Jamir , Lee K.Y. , Khor Shing Fhan

This paper aims to investigate the dielectric properties, i.e., dielectric constant (ε′), dielectric loss factor (ε″), dielectric tangent loss (tan δ), electrical conductivity (σ), and penetration depth (Dp), of the porous nanohydroxyapatite/starch composites in the function of starch proportion, pore size, and porosity over a broad band frequency range of 5 MHz–12 GHz. The porous nanohydroxyapatite/starch composites were fabricated using different starch proportions ranging from 30 to 90 wt%. The results reveal that the dielectric properties and the microstructural features of the porous nanohydroxyapatite/starch composites can be enhanced by the increment in the starch proportion. Nevertheless, the composite with 80 wt% of starch proportion exhibit low dielectric properties (ε′, ε″, tan δ, and σ) and a high penetration depth because of its highly interconnected porous microstructures. The dielectric properties of the porous nanohydroxyapatite/starch composites are highly dependent on starch proportion, average pore size, and porosity. The regression models are developed to express the dielectric properties of the porous nanohydroxyapatite/starch composites (R2 > 0.96) in the function of starch proportion, pore size, and porosity from 1 to 11 GHz. This dielectric study can facilitate the assessment of bone scaffold design in bone tissue engineering applications.

View
Thumbnail Image
Publication

Dielectric properties of Nephelium Lappaceum tropical wood

2020-03-25 , Khor Shing Fhan , Cheng Ee Meng , Banjuraizah Johar , Nashrul Fazli Mohd Nasir , Zaizul M.A. , Wan Azani Wan Mustafa , Nik Noriman Zulkepli , Dahham O.S.

Dielectric properties of rambutan wood (Nephelium Lappaceum) were investigated in three anisotropic directions, namely miters-cut, cross-cut, and rib-cut. Dielectric constants and dielectric loss factors were measured at ambient temperatures by using an impedance analyzer. The dielectric constant decreased as frequency increased from 4 to 1 MHz. Among the wood specimens, the rib-cut direction has the lowest dielectric constant, while the cross-cut direction has the highest value. A dielectric dispersion occurred within frequencies 100 Hz to 10 kHz, which corresponding to a relaxation peak as observed on dielectric loss factor spectra. The relaxation peak value of the dielectric loss factors shifted towards higher frequencies in the sequence of rib-cut, miters-cut, and cross-cut specimen. Above 500 Hz, the cross-cut specimen has the highest value conductivity than others. Generally, these variations were subjected to the anatomical structure in the wood, such as parenchyma, ray cell, vessel cell, and fiber cell.

View
No Thumbnail Available
Publication

The total phenolic content, total flavonoid content and antioxidant properties of E.tirucalli L. extract partitioned using different solvents

2025 , Mangalagowri Sangar , Nur Farahiyah Mohammad , Siti Shuhadah Md Saleh , Alwani Ibrahim , Farah Diana Mohd Daud , Roy Francis Navea , Khairul Farihan Kasim , Nashrul Fazli Mohd Nasir

E.tirucalli L. is a succulent plant native to Africa renowned for its medicinal properties and antioxidant activity. This study aimed to evaluate the total phenolic and flavonoid content as well as the antioxidant activity of E.tirucalli L. extracts obtained using different solvents. Aqueous ethanol, hexane, and dichloromethane were used for extraction through Soxhlet extraction and partitioning. The total phenolic content was highest in the aqueous ethanol extract (2.501 mg GAE/g), followed by hexane (0.110 mg GAE/g) and dichloromethane (0.050 mg GAE/g) extracts. Similarly, the total flavonoid content was highest in the aqueous ethanol extract (1.307 mg QE/g), followed by hexane (0.164 mg QE/g) and dichloromethane (0.061 mg QE/g) extracts. The DPPH assay demonstrated that the aqueous ethanol extract exhibited the highest radical scavenging activity (RSA) with an IC50 value of 36.89 ± 0.05 μg/mL, followed by dichloromethane (50.94 ± 0.39 μg/mL) and hexane (62.42 ± 1.34 μg/mL) extracts. These findings indicate that aqueous ethanol is an effective solvent for extracting phenolic and flavonoid compounds with potent antioxidant activity from E.tirucalli L. extracts.

View
Thumbnail Image
Publication

Morphological and optical properties of porous hydroxyapatite/cornstarch (HAp/Cs) composites

2020-01-01 , Beh C.Y. , Cheng Ee Meng , Nashrul Fazli Mohd Nasir , Mohd Tarmizi E.Z. , Eng S.K. , Mohd Shukry Abdul Majid , Mohd Ridzuan Mohd Jamir , Khor Shing Fhan , Ahmad Saad F.S.

This paper presents the correlation between the morphological characteristics and the diffuse reflectance (optical properties) of the porous hydroxyapatite/cornstarch (HAp/Cs) composites with various starch proportions (30, 40, 50, 60, 70, 80 and 90 wt%). The porous composites were measured via SEM and enhanced by image processing to find the average pore size, strut width, and average surface roughness. The average porosity of the porous composites was measured using liquid displacement method. The diffuse reflectance spectroscopy was implemented to investigate the diffuse reflectance and the corresponding optical band gap energy of the porous composites in the 500e900 nm range. A relationship between morphological characteristics and diffuse reflectance properties were established using Pearson's correlation coefficient. The findings of the study depict that a strong correlation can be noticed between optical band gap energy with porosity, pore sizes and surface roughness of the porous composites. Meanwhile, the strong correlations between the diffuse reflectance spectral gradient with surface roughness can be observed. The moderate correlations can be observed between the diffuse reflectance spectral gradient with pore sizes and strut width of the porous composites.

View
Thumbnail Image
Publication

Nano Hydroxyapatite (Nano-HA) based on pholas orientalis shells and degradation analysis

2023-04 , Mohd Riza Mohd Roslan , Nashrul Fazli Mohd Nasir , Nur Farahiyah Mohammad , Farah Diana Mohd Daud , Cheng Ee Meng , Beh Chong You

Millions of tons of seashells are produced every day as waste around the world. These underutilized seashells waste was executed as calcium precursor by researcher to synthesis the nano-hydroxyapatite (nano-HA). Nano-HA was successfully synthesised from Pholas Orientalis seashells waste via the chemical precipitation method. Different sintering temperatures were implemented to evaluate the physicochemical criteria of nano-HA. The obtained powders were examined by various physicochemical methods such as XRD, FTIR, FESEM, EDX and degradation analysis. The peaks in XRD and FTIR analysis the HA is successfully produced. The FESEM images on the other hand showing the HA particle in nano size range with rice-like structure. Meanwhile, a variation of Ca/P ratio can be observed in respect to sintering temperatures. The Ca/P ratio for HA-WS, HA-S500 and HA-S700 sample is 1.78, 2.03 and 1.57 respectively. Different sintering temperatures result in different crystallinity value which consequently affects its degradation profile.

View
No Thumbnail Available
Publication

Fostering innovation in K-12 education: a systematic review of the integration of design thinking within educational technology

2025-11 , Wan Azani Wan Mustafa , Nashrul Fazli Mohd Nasir , Mohd Yahya Fadzli Jusoh , Nor Asniza Ishak , Siti Norhazlin Mohd Said , Rendi Restiana Sukardi

Design Thinking has surfaced as a skill set as well as mindset phenomenon renowned for its problem-solving efficacy in the realms of business, engineering, and corporate endeavors. Nevertheless, the degree to which these skills and mindsets can be harnessed to benefit the field of Education, particularly within the domain of Educational Technology (edtech) at the K-12 educational level, warrants examination. In order to meet this inquiry, the present study conducts a Systematic Literature Review aimed at identifying potential gaps in applying Design Thinking principles within the sphere of Educational Technology, with the objective of making these principles accessible to all stakeholders involved in K-12 education. A comprehensive analysis encompassed 133 articles retrieved from SCOPUS as well as Web of Science (WoS) databases. Moreover, these articles underwent a thorough filtering process following the PRISMA Framework, including 32 articles for final-stage analysis. These 32 articles explored three overarching themes: (1) Design Thinking in education, (2) Student-Centered Learning Environments, and (3) Innovative Educational Technologies. In summation, Design Thinking possesses the potential to enhance the field of Educational Technology, equipping it with the requisite knowledge, skills, values, and mindset necessary to fortify 21st-century-oriented pedagogical practices for K-12 students. Furthermore, this research encourages subsequent investigations by fellow scholars to adapt and refine Design Thinking methodologies in facilitating creative and innovative approaches to Educational Technology and Science, Technology, Engineering, and Mathematics (STEM)-based instruction as well as learning within K-12 educational settings.

View
Thumbnail Image
Publication

Low frequency dielectric and optical behavior on physicochemical properties of hydroxyapatite/cornstarch composite

2021-10-15 , Beh C.Y. , Cheng Ee Meng , Nashrul Fazli Mohd Nasir , Khor Shing Fhan , Eng S.K. , Mohd Shukry Abdul Majid , Mohd Ridzuan Mohd Jamir , Lee K.Y.

An investigation on relationship among the physicochemical, optical and dielectric properties of the hydroxyapatite/cornstarch (HA/Cs) composites with the starch proportion of 30, 40, 50, 60, 70, 80 and 90 wt% is presented in this work. The HA/Cs composites have been characterized via FTIR, XRD, DRS and impedance analyzer. This work depicts that the strong interaction is exhibited between the hydroxyapatite nanoparticles and starch as the starch proportion increases. This increment trend results in the higher crystallinity of the HA/Cs composites. The highly crystallized HA/Cs with hydroxyapatite nucleation center presents low optical properties (diffuse reflectance and optical band gap energy). The HA/Cs composite with 80 wt% starch proportion (H2C8) show higher dielectric properties (dielectric constant, loss factor and conductivity) due to the stronger interfacial interaction and close-packed HA/Cs crystalline structure. The relationship among the physicochemical, optical and dielectric properties of the HA/Cs composite is studied in this work for potential of instrumentation design.

View
Thumbnail Image
Publication

Microwave reflection measurement on thermal degradation of animal and vegetable oils

2022-10-01 , Cheng Ee Meng , Shahriman Abu Bakar , Tan W.H. , Mohd Afendi Rojan , Khor Shing Fhan , Nashrul Fazli Mohd Nasir , Robiah M.C.W.S. , You K.Y.

In this work, the reflection measurement on animal and vegetable oils due to different heating temperature was conducted using Agilent E8362B slim probe in conjunction with Agilent E8362B PNA Network Analyzer. The effect of thermal degradation on measured reflection efficient (Γ) is investigated. Many chemical processes are occurred when edible oils are heated during frying process. The thermal degradation products, i.e., volatile and non-volatile chemical compounds are generated. The generated volatile chemical compounds are dangerous to human health. Products of thermal degradation of animal and vegetable oils can be carcinogenic. On the other hand, it may cause diabetes, atherosclerosis, Alzheimer’s and Parkinson’s diseases, coronary heart disease, sudden cardiac death, and systemic vasculitis. Slim probe and open ended coaxial sensor are implemented to measure the reflection coefficient of the cooking oils. The fresh animal fats and vegetable oils are commercially available in local market. Five types of cooking oil (i.e. corn oil, olive oil, palm oil, sunflower oil and walnut oil) were measured at the temperature of 60ºC, 80ºC and 100 ºC for the frequency range of 3 GHz to 8GHz. When the oil is subjected to thermal degradation during heating, the chemical chain of oil will be altered and resulting in physical and internal properties change. It is the key element that led to the variation of Γ. Γ is function of physical-chemical properties of cooking oil that implying the oil quality. In reflection measurement, there are different noticeable results which indicates the used and fresh cooking oil and the effect of heating period

View