Siti Rabizah Makhsin

Universiti Teknologi MARA

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Co-Authors

Rozina Abdul Rani

Universiti Teknologi MARA

Patricia Scully

Ollscoil na Gaillimhe – University of Galway

Khairunisak Abdul Razak

Universiti Sains Malaysia

P. Gardner

University of Manchester

Nor Hayati Saad

Universitas 17 Agustus 1945 Samarinda

Ahmad Sabirin Zoolfakar

Universiti Teknologi MARA

Nur Lili Suraya Ngadiman

Universiti Teknologi MARA

Muhammad Haziq Noor Akashah

Universiti Teknologi MARA

Muhammad Azmi Ayub

Universiti Teknologi MARA

Mohammed Zourob

Alfaisal University

Cooperative Institutions

Universiti Teknologi MARA

University of Malaya

National University of Malaysia

Universiti Sains Malaysia

Faculty (United Kingdom)

Universiti Teknologi MARA System

University of Technology Malaysia

Universiti Malaysia Pahang Al-Sultan Abdullah

International Islamic University Malaysia

Universiti Tunku Abdul Rahman

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Physical Properties of Graphene

Journal of Mechanical Engineering (2023)

Siti Rabizah Makhsin

In the realm of engineering materials, a profound understanding of structural and physical characteristics holds paramount importance due to their ubiquitous presence and diverse applications. This comprehensive review delves deeply into the intricate physical attributes, commonly referred to as "physical properties," of materials based on graphene. It encompasses a wide range of aspects, including magnetic properties, optical behaviours, electrical and thermal conductivities, thickness and layer arrangements, size and shape variations, colour properties, melting points, and hardness traits. This review also explores the intriguing correlation between graphene's thickness and layering and their respective effects on its properties. Special emphasis is placed on the characterization techniques used to unveil these properties, with detailed examples from recent literature illustrating their significance. Advanced instrumentation, such as Atomic Force Microscopy (AFM), Surface Plasmon Resonance spectroscopy (SPR), Raman spectroscopy, Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD), is harnessed to provide comprehensive insights into the physical characteristics of graphene-based materials. In essence, this concise yet comprehensive review illuminates the exceptional physical properties of graphene-based materials and their potential to revolutionize various industrial sectors.

Characterization

10.24191/jmeche.v12i1.24649

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Citations (7)

Signal Improvement on Fibre Optic Evanescent Wave Sensor Based Polymeric Sensitive Coating of Chitosan-Agarose Hydrogel

Lecture notes in mechanical engineering (2023)

Muhammad Haziq Noor Akashah Siti Rabizah Makhsin Rozina Abdul Rani Nor Hayati Saad Khairunisak Abdul Razak

Agarose

SIGNAL (programming language)

10.1007/978-981-19-9509-5_15

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Citations (0)

Determination of the pH sensitivity level of anodized Ta₂O₅ nanotubular using pH buffer solution: Towards engine oil deterioration sensor

Nur Lili Suraya Ngadiman Rozina Abdul Rani Zulasyraf Farhan Zulkifli Muhammad Firdaus Abdullah Siti Rabizah Makhsin

Tantalum is a potential material for metal anodizing, which enables the fabrication of ideal nanostructured Ta 2 O 5 . This project planned to employ Ta 2 O 5 , an anodized metal oxide, as a chemical sensor application. In the field of Ta 2 O 5 research, there is a lack of investigation into Ta 2 O 5 efficacy for the detection of engine oil deterioration. In this project, the objective is to fabricate Ta 2 O 5 nanotubular as sensing layers for the detection of engine oil deterioration. The Ta 2 O 5 sensor was fabricated through the anodization synthesis method and was then tested with 2, 4, 7, 10, and 12 pH buffer solutions. Anodization is very reliable for building nanostructures as it is easy to be manipulated. Samples were characterized using field emission scanning electron microscope (FESEM) for surface morphology and structural analysis, and their crystalline properties by X-ray diffraction (XRD). The output voltage was plotted over time, and the pH sensitivity of anodized Ta 2 O 5 was reported. As the result, the sensitivity sensor obtained for both 30 min and 60 min anodized samples were 31.616 mV/pH and 24.591 mV/pH, respectively, while the response time was obtained for rise time and fall time was 20 seconds and 90 seconds, respectively.

10.1109/rsm52397.2021.9511581

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Citations (2)

The effects of size and synthesis methods of gold nanoparticle-conjugated MαHIgG₄for use in an immunochromatographic strip test to detect brugian filariasis

Nanotechnology (2012)

Siti Rabizah Makhsin Khairunisak Abdul Razak Rahmah Noordin Nor Dyana Zakaria Tan Chun

This study describes the properties of colloidal gold nanoparticles (AuNPs) with sizes of 20, 30 and 40 nm, which were synthesized using citrate reduction or seeding-growth methods. Likewise, the conjugation of these AuNPs to mouse anti-human IgG(4) (MαHIgG(4)) was evaluated for an immunochromatographic (ICG) strip test to detect brugian filariasis. The morphology of the AuNPs was studied based on the degree of ellipticity (G) of the transmission electron microscopy images. The AuNPs produced using the seeding-growth method showed lower ellipticity (G ≤ 1.11) as compared with the AuNPs synthesized using the citrate reduction method (G ≤ 1.18). Zetasizer analysis showed that the AuNPs that were synthesized using the seeding-growth method were almost monodispersed with a lower polydispersity index (PDI; PDI≤0.079), as compared with the AuNPs synthesized using the citrate reduction method (PDI≤0.177). UV-visible spectroscopic analysis showed a red-shift of the absorbance spectra after the reaction with MαHIgG(4), which indicated that the AuNPs were successfully conjugated. The optimum concentration of the BmR1 recombinant antigen that was immobilized on the surface of the ICG strip on the test line was 1.0 mg ml(-1). When used with the ICG test strip assay and brugian filariasis serum samples, the conjugated AuNPs-MαHIgG(4) synthesized using the seeding-growth method had faster detection times, as compared with the AuNPs synthesized using the citrate reduction method. The 30 nm AuNPs-MαHIgG(4), with an optical density of 4 from the seeding-growth method, demonstrated the best performance for labelling ICG strips because it displayed the best sensitivity and the highest specificity when tested with serum samples from brugian filariasis patients and controls.

Absorbance

Dispersity

Sodium citrate

10.1088/0957-4484/23/49/495719

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Citations (58)

Annealing Effect On Ultraviolet Sensor Performance With Porous Silicon Based

Muhammad Zuhdi Mohd Yusoff Rozina Abdul Rani Irnie Azlin Zakaria Siti Rabizah Makhsin Ahmad Sabirin Zoolfakar

Nowadays, most semiconductor industries apply silicon-based material in developing advanced electronic device. Concerns with heat management of electronic devices which getting worst day by day, the nanostructures technologies were introduced in order to overcome the problem. The nanostructures development on bulk crystalline silicon known as porous silicon which could be produced via anodization method. In this study, the anodized porous silicon was annealed at temperatures of 200°C up to 800°C for the research purpose of annealing effect on ultraviolet sensor performance. The structures of porous silicon were analyzed via FESEM and XRD characterization in order to identify the morphology and crystallinity of porous silicon. Then, the ultraviolet sensors were produced and the sensors performance were analyzed. After post-annealing treatment, the anodized porous silicon has the strongest crystalline peak at 600°C and 800°C, while below 400°C, the porous silicon samples have a broadened XRD peak around $2\theta=33^{\circ}$ . However, our experimental results show that an ultraviolet sensor which anneal at temperature 200°C have the best sensing performance.

Porous Silicon

Anodizing

Ultraviolet

10.1109/icse56004.2022.9863103

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Citations (2)

Synthesis of Gold Nanoparticles and Its Conjugation Strategies to Biomolecules for Biomedical Applications

Reviews in Advanced Sciences and Engineering (2015)

Siti Rabizah Makhsin Poay Ling Teoh Khairunisak Abdul Razak

Biomolecule

10.1166/rase.2015.1070

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Citations (5)

Contributors

Elsevier eBooks (2022)

NorFarah Diana Jaafar Abdullah Khalid H. Abed Nadia Adrus Muhammad Haziq Noor Akashah

10.1016/b978-0-323-85457-3.00099-2

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Citations (0)

Chemical properties of graphene

Elsevier eBooks (2022)

Muhammad Haziq Noor Akashah Mohd Rafal Sahudin Rozina Abdul Rani Patricia Scully Siti Rabizah Makhsin

Surface Modification

Characterization

10.1016/b978-0-323-85457-3.00023-2

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Citations (7)

Modifies Hummer’s Method of Graphene Oxide Nanostructures for Fibre Optic Sensors Application

Scientific Research Journal (2021)

Siti Rabizah Makhsin Muhammad Izham Hakimi Mohd Zali Rozina Abdul Rani Nor Hayati Saad Muhammad Azmi Ayub

For optical fibre sensors applications, nanomaterials have been widely used to enhance sensor performance. Here, the fibre optic uses the transmission of light by total internal reflection along with the fibre and depending on the diameter of the fibre and the wavelength of the light used. Among others, graphene oxides nanostructures (GO) would offer exceptional advantages on the sensing mechanism due to 2D properties of the monocellular layer originally from graphite. The main objectives of this research are to successfully synthesis of GO using a chemical reduction method known as modifies Hummer’s method and later, deposited the GO onto the modified fibre optic layer to create a sensing platform. Prior than that, the standard plastic of fibre optic (POF) was modified by removing the cladding layer (1 cm) using a mechanical etching technique, thus the sensing platform can be created. The morphology and optical properties of the system were characterised using scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis) spectroscopy. Result of the preparation and characterisation of GO-optical fibre coatings was presented, considering its potential use for sensing applications. The stable GO was prepared by 3 hours of stirring time during the synthesis and longer dipping time was preferred to fully coat the core of the exposed POF. Aiming to explore this scheme for sensing applications, GO-coated tilted fibre will be later measuring via refractive index variations. An improvement on the sensitivity should be obtained and thus become a promising sensing platform for the development of a new line of sensors.

Cladding (metalworking)

Nanomaterials

Subwavelength-diameter optical fibre

10.24191/srj.v18i1.11386

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Citations (3)

Effects of metal electrodes and dielectric thickness on non-volatile memory with embedded gold nanoparticles in polymethylsilsesquioxane

Microelectronic Engineering (2012)

Poh Choon Ooi Kean C. Aw Khairunisak Abdul Razak Siti Rabizah Makhsin Wei Gao

Non-Volatile Memory

10.1016/j.mee.2012.05.006

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Citations (9)