Tan Soo Jin
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Preferred name
Tan Soo Jin
Official Name
Tan, Soo Jin
Alternative Name
Jin, T. S.
Tan, S. J.
Soo-Jin, Tan
Tan, J. S.
Jin, Tan Soo
Main Affiliation
Scopus Author ID
55432801200
Researcher ID
ABG-5365-2021

Research Output

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  • Publication
    Functionalized Carbon Nanotube-Modified ELISA for Early Detection of Heart Attack
    ( 2023-12-01)
    Chow E.M.Y.
    ;
    Foo Kai Loong
    ;
    Subash Chandra Bose Gopinath
    ;
    Tan Soo Jin
    ;
    Kashif M.
    ;
    Heah Cheng Yong
    ;
    Liew Yun Ming
    A warning issue of heart attacks in young adults needs immediate attention lately. Enzyme-linked immunosorbent assay (ELISA) is an easy and commonly used method for detecting early stages of heart attack. Cardiac troponin I (cTnI) is a responsible biomarker for acute myocardial infarction. However, the conventional ELISA system was only able to detect at 100 pM of cTnI. To improve the system, enhancements were introduced through the integration of functionalized carbon nanotube (fCNT) to amplify cTnI detection signals. By utilizing the advantage of fCNT, a noticeable improvement in results can be obtained. The detection limit was lowered down to an impressive 10 pM. Furthermore, the change of absorbance increased from 31.90% for conventional ELISA surge to 98.61 for modified ELISA system. This three-fold increase in sensitivity shows remarkable improvement through the introduction of fCNT in modified ELISA technique.
      1
  • Publication
    Properties of polyaniline/graphene oxide (PANI/GO) composites: effect of GO loading
    ( 2021-09-01)
    Mutalib T.N.A.B.T.A.
    ;
    Tan Soo Jin
    ;
    Foo Kai Loong
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Mohd. Mustafa Al Bakri Abdullah
    Polyaniline/graphene oxide (PANI/GO) composites at different wt% of GO were prepared via solution method. PANI was mixed with the GO synthesized from the improved Hummer’s method. The formation of GO was confirmed via Raman and C/O ratio. Based on the FT-IR, XRD and SEM results, it confirmed the presence of both PANI and GO characteristics at 10.9°, 25.8° and 27.8° and interactions between PANI and GO particles in PANI/GO composites at different GO loading. SEM micrographs showed a folding and wrinkled surface of GO due to the defect upon oxidation process. This means that the weak π–π interactions or the agglomeration of GO have caused PANI unable to attach on the large conjugated basal planes of GO sheets. The defective domains made GO as an insulator as it contained distortions and oxygen-containing functional groups and their local decoration. Low-conductivity domain had conquered most of the GO region which later reduced the pathway of the current flow; therefore, conductivity is affected. The wrinkled structure also resulted in the low conductivity as it weakens the interfacial interaction between PANI and GO and thus disrupted the electron movement in the composites. Due to this, the electrical conductivity reached up to 1.83 × 10−10 S/cm as the GO loading increased to 50 wt%.
      2
  • Publication
    Hydrothermal Growth Zinc Oxide Nanorods for pH Sensor Application
    ( 2023-10-01)
    Foo Kai Loong
    ;
    Tan Soo Jin
    ;
    Heah Cheng Yong
    ;
    Subash Chandra Bose Gopinath
    ;
    Liew Yun Ming
    ;
    Uda Hashim
    ;
    Voon Chun Hong
    The aim of this work is to apply synthesized zinc oxide (ZnO) Nanorods using hydrothermal (HTL) growth technique for pH sensor application. The highly crystallite of ZnO Nanorods was obtained by anneal the growth ZnO Nanorods in furnace at 200 °C for 2 hours. Besides that, XRD analysis shows the produced ZnO Nanorods belonged to the (002) plane. Furthermore, Scanning Electron Microscope (SEM) images confirm that the ZnO Nanorods with hexagonal-faceted structural were successfully produced by HTL growth technique. In addition, Ultraviolet–visible (UV-Vis) spectrophotometer analysis shows that the synthesized ZnO belongs to the wide band gap semiconductor material. The growing ZnO Nanorods were then subjected to electrical measurement with various pH levels. The outcome demonstrates that the current rises as the solution changes from acidic to alkaline. Overall, our study shows a relationship between the electrical as well as the structural characteristics of ZnO Nanorods at various pH levels.
      1
  • Publication
    Functionalized carbon nanotube - modified ELISA for early detection of heart attack
    ( 2023-12)
    Emily M. Y. Chow
    ;
    Foo Kai Loong
    ;
    Subash Chandra Bose Gopinath
    ;
    Tan Soo Jin
    ;
    M. Kashif
    ;
    Heah Cheng Yong
    ;
    Liew Yun Ming
    A warning issue of heart attacks in young adults needs immediate attention lately. Enzyme-linked immunosorbent assay (ELISA) is an easy and commonly used method for detecting early stages of heart attack. Cardiac troponin I (cTnI) is a responsible biomarker for acute myocardial infarction. However, the conventional ELISA system was only able to detect at 100 pM of cTnI. To improve the system, enhancements were introduced through the integration of functionalized carbon nanotube (fCNT) to amplify cTnI detection signals. By utilizing the advantage of fCNT, a noticeable improvement in results can be obtained. The detection limit was lowered down to an impressive 10 pM. Furthermore, the change of absorbance increased from 31.90% for conventional ELISA surge to 98.61 for modified ELISA system. This three-fold increase in sensitivity shows remarkable improvement through the introduction of fCNT in modified ELISA technique.
      4  24
  • Publication
    Evaluation of the effect of silica fume on amorphous fly ash geopolymers exposed to elevated temperature
    ( 2021-01-01)
    Li O.H.
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Bayuaji R.
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Foo Kai Loong
    ;
    Tan Soo Jin
    ;
    Teng N.H.
    ;
    Nabiałek M.
    ;
    Jeż B.
    ;
    Sing N.Y.
    The properties of amorphous geopolymer with silica fume addition after heat treatment was rarely reported in the geopolymer field. Geopolymer was prepared by mixing fly ash and alkali activator. The silica fume was added in 2% and 4% by weight. The geopolymer samples were cured at room temperature for 28 days before exposed to an elevated temperature up to 1000â—¦C. The incorporation of 2% silica fume did not cause significant improvement in the compressive strength of unexposed geopolymer. Higher silica fume content of 4% reduced the compressive strength of the unexposed geopolymer. When subjected to elevated temperature, geopolymer with 2% silica fume retained higher compressive strength at 1000â—¦C. The addition of silica fume in fly ash geopolymer caused a lower degree of shrinkage and expansion, as compared to geopolymer without the addition of silica fume. Crystalline phases of albite and magnetite were formed in the geopolymer at 1000â—¦C.
      2  27
  • Publication
    Turning waste into strength enhancing geopolymer composites with Oil Palm Frond Fibers (OPF)
    ( 2024-10)
    Ng Hui-Teng
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Tan Soo Jin
    ;
    Muhammad Aqil Asyraf Bin Mohd Roslan
    ;
    Siti Khadijah Binti Zulkepli
    ;
    Tan You How
    ;
    Ng Yong-Sing
    Geopolymers are alternatives to ordinary Portland cement as construction materials. The increasing demand for sustainable construction materials has driven the utilization of industrial by-products and agricultural waste. The disposal of oil palm frond (OPF) biomass as waste in landfills poses significant environmental challenges, necessitating effective recycling strategies. This study examines the incorporation and feasibility of OPF as a reinforcing fiber in fly ash geopolymer composites, examining its impact on physical and mechanical properties. Various parameters were tested, including fiber content (10–20 wt.%), shapes (shredded and tubular), and lengths (1–3 cm). The geopolymer composites with 10 wt.% shredded oil palm frond and 1-cm tubular oil palm frond fibers enhance the compressive strength by 17% compared to the control sample without oil palm frond. The shredded oil palm frond was particularly effective, enhancing strength performance and achieving better dispersion within the geopolymer matrix. Conversely, increasing the fiber content and length generally resulted in diminished composite strength, attributed to the creation of a more porous structure and weaker fiber-matrix interactions. However, lower fiber additions were shown to decrease porosity and water absorption, highlighting the potential of optimized oil palm frond fiber content and form in improving the environmental and mechanical performance of geopolymer composites. These results support the viability of oil palm frond as a sustainable additive in geopolymers, contributing to waste reduction and material innovation in construction.
      1  31
  • Publication
    Hydrothermal growth zinc oxide nanorods for pH sensor application
    ( 2023-10)
    Foo Kai Loong
    ;
    Tan Soo Jin
    ;
    Heah Cheng Yong
    ;
    Subash Chandra Bose Gopinath
    ;
    Liew Yun Ming
    ;
    Uda Hashim
    ;
    Voon Chun Hong
    The aim of this work is to apply synthesized zinc oxide (ZnO) Nanorods using hydrothermal (HTL) growth technique for pH sensor application. The highly crystallite of ZnO Nanorods was obtained by anneal the growth ZnO Nanorods in furnace at 200°C for 2 hours. Besides that, XRD analysis shows the produced ZnO Nanorods belonged to the (002) plane. Furthermore, Scanning Electron Microscope (SEM) images confirm that the ZnO Nanorods with hexagonal-faceted structural were successfully produced by HTL growth technique. In addition, Ultraviolet–visible (UV-Vis) spectrophotometer analysis shows that the synthesized ZnO belongs to the wide band gap semiconductor material. The growing ZnO Nanorods were then subjected to electrical measurement with various pH levels. The outcome demonstrates that the current rises as the solution changes from acidic to alkaline. Overall, our study shows a relationship between the electrical as well as the structural characteristics of ZnO Nanorods at various pH levels.
      1  21
  • Publication
    Enhanced Electrical Properties of Graphite-Doped Titanium Dioxide Thin Films via Sol-Gel Method
    (Universiti Malaysia Perlis, 2025-06)
    Foo Kai Loong
    ;
    Tan Soo Jin
    ;
    Heah Cheng Yong
    ;
    Liew Yun Ming
    Graphite-doped titanium dioxide (Gr-TiOâ‚‚) thin films were synthesized via the sol-gel method to enhance the electrical properties of TiOâ‚‚ for advanced electronic and biosensor applications. The study focuses on optimizing the drying temperatures and graphite doping levels to achieve improved film crystallinity, morphology, and conductivity. Thin films were deposited using spin-coating and analyzed through scanning electron microscopy (SEM), high-power microscopy (HPM), and current-voltage (I-V) measurements. Results indicate that increasing drying temperature enhances grain coalescence and reduces porosity, leading to improved electrical conductivity. Graphite doping effectively narrows the bandgap and introduces additional charge carriers. These findings demonstrate the potential of Gr-TiOâ‚‚ thin films for applications in photovoltaics, sensors, and other optoelectronic devices.
      1  15
  • Publication
    Evaluation of the effect of silica fume on amorphous fly ash geopolymers exposed to elevated temperature
    ( 2021)
    Ong Huey Li
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Ridho Bayuaji
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Foo Kai Loong
    ;
    Tan Soo Jin
    ;
    Ng Hui Teng
    ;
    Marcin Nabiałek
    ;
    Bartlomiej Jeż
    ;
    Ng Yong Sing
    The properties of amorphous geopolymer with silica fume addition after heat treatment was rarely reported in the geopolymer field. Geopolymer was prepared by mixing fly ash and alkali activator. The silica fume was added in 2% and 4% by weight. The geopolymer samples were cured at room temperature for 28 days before exposed to an elevated temperature up to 1000 °C. The incorporation of 2% silica fume did not cause significant improvement in the compressive strength of unexposed geopolymer. Higher silica fume content of 4% reduced the compressive strength of the unexposed geopolymer. When subjected to elevated temperature, geopolymer with 2% silica fume retained higher compressive strength at 1000 °C. The addition of silica fume in fly ash geopolymer caused a lower degree of shrinkage and expansion, as compared to geopolymer without the addition of silica fume. Crystalline phases of albite and magnetite were formed in the geopolymer at 1000 °C.
      1  20
  • Publication
    Acid-resistance of one-part geopolymers: Sodium aluminate and carbonate as alternative activators to conventional sodium metasilicate and hydroxide
    ( 2023-11-10)
    Wan-En O.
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Ho Li Ngee
    ;
    Pakawanit P.
    ;
    Wei Ken P.
    ;
    Khalid M.S.
    ;
    Md Razi H.
    ;
    Lee W.H.
    ;
    Tan Soo Jin
    ;
    Shee-Ween O.
    ;
    Yong-Jie H.
    In this study, the durability of one-part geopolymers (OPGs) made from high calcium fly ash is assessed by investigating their resistance to acid attacks. The predominant use of less environmentally sustainable sodium metasilicate (Na2SiO3) and sodium hydroxide (NaOH) in OPG, along with the limited understanding about the influence of solid alkali activators on OPG's acid resistance propelled the investigation and comparison of acid resistance of OPGs activated using both conventional activators and potential alternatives like sodium aluminate (NaAlO2) and sodium carbonate (Na2CO3). The OPGs developed were exposed to sulphuric acid (H2SO4) solution for 28 days. The MH sample (activated with Na2SiO3 and NaOH) was vulnerable to acid attack, with a 66% compressive strength drop after 5% H2SO4 solution exposure, due to high sorptivity. In contrast, the MA sample (activated with Na2SiO3 and NaAlO2) demonstrated excellent acid resistance, with only a 32% strength reduction, attributed to its Al-rich hydrated gel. The MC sample (activated with Na2SiO3 and Na2CO3) exhibited a 41% strength reduction, where the formation of calcite reduced extensive ion exchange, gradually mitigated deterioration. The residual compressive strength of MA and MC samples increased by 7% and 9% from 7 to 28 days of immersion in 5% H2SO4 solution, respectively. The NaAlO2 and Na2CO3 are potential activators for OPG, serving as alternative construction materials to OPC and traditional geopolymers in acidic environments.
      2  32