Article
Engineering, Multidisciplinary
Amir Reza Sadrolhosseini, Suhaidi Shafie, Suraya Abdul Rashid, Mohd Adzir Mahdi
Summary: A surface plasmon resonance method based on a prismatic configuration was used to detect chemical toxins using layers of polypyrrole-graphene dots nanocomposite. The thickness and refractive index of the layer were characterized, and it was found to be effective in measuring low concentrations of arsenic ions. The sensor's sensitivity for arsenic detection was higher compared to mercury and lead ions.
Article
Engineering, Multidisciplinary
Amir Reza Sadrolhosseini, Suhaidi Shafie, Suraya Abdul Rashid, Mohd Adzir Mahdi
Summary: A surface plasmon resonance method based on polypyrrole-graphene quantum dots layer was developed for detecting chemical toxins with high sensitivity. Characterization methods such as field emission-scanning microscopy, X-ray diffraction spectroscopy, and Fourier transform infrared spectroscopy were employed to analyze the morphology and chemical elements of the composite layer, demonstrating the versatility and accuracy of the technique. The sensor showed a detection limit of 0.005 ppm for arsenic ions, outperforming mercury and lead ions in terms of sensitivity.
Article
Chemistry, Multidisciplinary
Nur Afifah Ahmad Nazri, Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nadhratun Naiim Mobarak, Tg Hasnan Tg Abd Aziz, Ahmad Rifqi Md Zain, Norhana Arsad, Yunhan Luo, Ahmad Ashrif A. Bakar
Summary: An optical sensor-based localized surface plasmon resonance (LSPR) sensor was demonstrated for sensitive and selective chlorophyll detection through the integration of amino-functionalized carbon quantum dots (NCQD) and triangle silver nanoparticles (AgNPs). The sensor showed high sensitivity and detection limits, with no interference from other ionic species.
Article
Optics
Hazwani Suhaila Hashim, Yap Wing Fen, Nur Alia Sheh Omar, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Nurul Illya Muhamad Fauzi, Jaafar Abdullah, Mohd Adzir Mahdi
Summary: By adding graphene quantum dots to the gold thin film, the sensing capabilities of the surface plasmon resonance sensor for phenol have been significantly improved. The gold-graphene quantum dots thin film has a lower limit of detection and higher sensitivity, and exhibits excellent selectivity towards phenol.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Nur Afifah Ahmad Nazri, Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nadhratun Naiim Mobarak, Yunhan Luo, Norhana Arsad, Tg Hasnan Tg Abd Aziz, Ahmad Rifqi Md Zain, Ahmad Ashrif A. Bakar
Summary: This paper investigates carbon quantum dots and silver nanoparticles as sensing materials for localized surface plasmon resonance sensors in chlorophyll detection. The composite material of carbon quantum dots and silver nanoparticles exhibits a better linear response and higher sensitivity than silver nanoparticles alone for chlorophyll detection.
Article
Optics
Nur Afifah Ahmad Nazri, Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nadhratun Naiim Mobarak, Athiyah Sakinah Masran, Ahmad Rifqi Md Zain, Mohd Adzir Mahdi, Adhitya Gandaryus Saputro, Triati Dewi Kencana Wung, Yunhan Luo, Ahmad Ashrif A. Bakar
Summary: This report introduces a microfiber chlorophyll sensor based on polymeric amine functionalized carbon quantum dots, which can detect chlorophyll with high sensitivity and low detection limit. The sensor utilizes surface plasmon resonance technique and shows promising potential for real-time environmental monitoring applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Guiqing Wen, Yang Xiao, Shuxin Chen, Xinghui Zhang, Zhiliang Jiang
Summary: A new method for detecting trace Co2+ in water was developed in this study, which is fast, stable, sensitive, and specific with dual mode characteristics. The method has been successfully applied to the detection of Co2+ in industrial wastewater, tap water, and river water.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Nurul Illya Muhamad Fauzi, Yap Wing Fen, Faten Bashar Kamal Eddin, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: In this study, graphene quantum dots (GQDs) and polyvinyl alcohol (PVA) composite were prepared and coated on a gold thin film. The structure, surface morphology, and optical properties of the samples were characterized using FT-IR, AFM, and UV-Vis spectroscopy. The results showed that the GQDs-PVA composite thin film had an increased surface roughness after exposure to carbaryl. The thin film exhibited a band gap E-g value of 4.090 eV and a lowest detection limit of 0.001 ppb for carbaryl.
Article
Chemistry, Multidisciplinary
Faten Bashar Kamal Eddin, Yap Wing Fen, Nurul Illya Muhamad Fauzi, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Nur Alia Sheh Omar, Muhammad Fahmi Anuar, Hazwani Suhaila Hashim, Amir Reza Sadrolhosseini, Huda Abdullah
Summary: In this study, a carbon quantum dot-based refractive index surface plasmon resonance sensor was designed for the rapid and sensitive detection of dopamine. The experimental results showed that the sensor had high sensitivity and binding affinity, and could monitor dopamine concentrations through optical characteristics analysis. Additionally, atomic force microscopy observation confirmed the binding of dopamine to the sensor layer, explaining the blue shift in the sensor's reflectance curve.
Article
Engineering, Electrical & Electronic
Faten Bashar Kamal Eddin, Yap Wing Fen, Josephine Ying Chyi Liew, Hong Ngee Lim, Nurul Illya Muhamad Fauzi, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: Graphene quantum dots (GQDs) have attracted attention in the biomedical field. In this study, GQDs monolayer film was coated on a gold thin film and integrated into surface plasmon resonance spectroscopy (SPR). The plasmonic sensing properties of GQDs/Au nanostructured layer in contact with dopamine (DA) solution were evaluated. The results showed that the platform had good sensitivity and binding affinity, and the structural and optical characteristics of the GQDs film changed after interaction with DA.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Physical
Ming-Yu Qi, Zi-Rong Tang, Yi-Jun Xu
Summary: The sun provides a vast amount of clean and renewable energy, and the challenge lies in utilizing this decentralized energy with appropriate media. Plasmonic metal-based nanostructures, such as gold and silver, are fascinating materials for solar energy conversion due to their unique surface plasmon resonance (SPR) capability. Modulating the optical absorption peaks of nonplasmonic metals, like small platinum nanoparticles, without altering their size has been a grand challenge. Recently, a near field scattering (NFS) optical model was demonstrated to manipulate the absorption peaks of platinum nanoparticles by adjusting their dielectric environment, paving the way for tuning the optical absorption properties of other metal nanoparticles and semiconductor quantum dots.
Review
Chemistry, Inorganic & Nuclear
Pavithra V. Ravi, Vinodhini Subramaniyam, Neha Saravanakumar, Ajay Pattabiraman, Moorthi Pichumani
Summary: Graphene Quantum Dots (GQDs) are a breakthrough material with optoelectronic properties, widely used in various applications such as agriculture, biomedical, sensors, energy storage, water desalination, and environmental remediation. Functionalization of GQDs enhances their biocompatibility, making them suitable for use in biotechnology, immunology, biochemistry, and diagnostics. The nanoscale morphology of GQDs can alter device structure and simplify functionality, leading to potential applications in wearable and portable sensors. This review explores functionalization strategies of GQDs and their applications in different fields.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Hiroyuki Kishida, Maiken H. Mikkelsen
Summary: Graphene quantum dots (GQDs) are luminescent nanomaterials with desirable properties, but their long radiative lifetimes limit their use. This study achieved fast and bright luminescence by coupling gap plasmon modes to nanoparticle emitters, resulting in a significant reduction in radiative lifetime.
Article
Chemistry, Analytical
Hongyan Yang, Mengyin Liu, Yupeng Chen, Ling Guo, Gongli Xiao, Houquan Liu, Jianqing Li, Libo Yuan
Summary: This study introduces a graphene-Au coated photonic crystal fiber sensor in the visible regime, which demonstrates high sensitivity and improved sensing performance through geometric optimization. The sensor has potential for applications in designing a new generation of highly sensitive biosensors.
Article
Instruments & Instrumentation
Surjeet Raikwar, Y. K. Prajapati, D. K. Srivastava, J. B. Maurya, J. P. Saini
Summary: This paper presents the design of a graphene-coated surface plasmon resonance sensor for detecting Leptospirosis bacteria in Rodent urine, distinguishing between oliguria and polyuria based on different levels of sensitivity and detection accuracy.
Article
Engineering, Multidisciplinary
Nur Alia Sheh Omar, Ramli Irmawati, Yap Wing Fen, Ernee Noryana Muhamad, Faten Bashar Kamal Eddin, Nur Ain Asyiqin Anas, Nur Syahira Md Ramdzan, Nurul Illya Muhamad Fauzi, Mohd Adzir Mahdi
Summary: A refractive index sensor using TiO2 extracted from moringa leaves-based nanocomposite thin film was developed to detect cadmium ions in an aqueous solution. The sensor showed good sensitivity response, strong binding affinity, and low signal-to-noise ratio, with good selectivity towards cadmium ions. The optical properties changes and increase in surface roughness proved the binding of Cd ions to the sensor film, proposing a new potential application for titanium dioxide extracted from moringa leaves-based nanocomposite thin film as a surface refractive index sensor for cadmium ions detection.
Article
Instruments & Instrumentation
Yasmin Mustapha Kamil, Sura Hmoud Al-Rekabi, Muhammad Hafiz Abu Bakar, Yap Wing Fen, Husam Abduldaem Mohammed, Nor Hafizah Mohamed Halip, Mohammed Thamer Alresheedi, Mohd Adzir Mahdi
Summary: In this study, a sensing layer made of hydrous ferric oxide (Fe2H2O4) is used to detect As(III) and As(V) ions in a surface plasmon resonance system. The sensor demonstrates high detection sensitivity and feasibility.
Article
Chemistry, Multidisciplinary
Faten Bashar Kamal Eddin, Yap Wing Fen, Nurul Illya Muhamad Fauzi, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Nur Alia Sheh Omar, Muhammad Fahmi Anuar, Hazwani Suhaila Hashim, Amir Reza Sadrolhosseini, Huda Abdullah
Summary: In this study, a carbon quantum dot-based refractive index surface plasmon resonance sensor was designed for the rapid and sensitive detection of dopamine. The experimental results showed that the sensor had high sensitivity and binding affinity, and could monitor dopamine concentrations through optical characteristics analysis. Additionally, atomic force microscopy observation confirmed the binding of dopamine to the sensor layer, explaining the blue shift in the sensor's reflectance curve.
Article
Optics
Nurul Illya Muhamad Fauzi, Yap Wing Fen, Jaafar Abdullah, Mazliana Ahmad Kamarudin, Nur Alia Sheh Omar, Faten Bashar Kamal Eddin, Nur Syahira Md Ramdzan, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: In this study, a GO-PVA composite thin film was successfully synthesized using spin coating techniques, and its properties and morphology were characterized. The GO-PVA thin film exhibited high absorbance and increased thickness, and showed potential for the detection of carbaryl pesticide at low concentrations of 0.02 ppb using an optical method based on surface plasmon resonance.
Article
Chemistry, Physical
Faten Bashar Kamal Eddin, Yap Wing Fen, Amir Reza Sadrolhosseini, Josephine Ying Chyi Liew, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: Surface plasmon resonance (SPR) technique was used to characterize the optical properties of chitosan-graphene quantum dots (CS-GQDs) thin film and dopamine (DA), demonstrating the potential of SPR technique to measure refractive index variations in real-time at very low concentrations and enhance sensitivity towards dopamine.
Article
Physics, Condensed Matter
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Yap Wing Fen, Faten Bashar Kamal Eddin, Jaafar Abdullah, Mohd Adzir Mahdi
Summary: In this study, optical characterization of nickel ion solution and NCC-GO thin film was performed using SPR technique, showing that NCC-GO contributes to the sensitivity enhancement of SPR for nickel ion sensing.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Nurul Illya Muhamad Fauzi, Yap Wing Fen, Faten Bashar Kamal Eddin, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: In this study, graphene quantum dots (GQDs) and polyvinyl alcohol (PVA) composite were prepared and coated on a gold thin film. The structure, surface morphology, and optical properties of the samples were characterized using FT-IR, AFM, and UV-Vis spectroscopy. The results showed that the GQDs-PVA composite thin film had an increased surface roughness after exposure to carbaryl. The thin film exhibited a band gap E-g value of 4.090 eV and a lowest detection limit of 0.001 ppb for carbaryl.
Article
Chemistry, Analytical
Faten Bashar Kamal Eddin, Yap Wing Fen, Josephine Ying Chyi Liew, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal
Summary: In this study, a plasmonic refractive index sensor using the biopolymer chitosan was developed for dopamine detection. The sensor exhibited stability and a high sensitivity, and the adsorption of dopamine was confirmed by experimental analyses. This research is important as it provides a simple, low-cost, and reliable platform for dopamine sensing.
Article
Optics
Faten Bashar Kamal Eddin, Yap Wing Fen, Josephine Ying Chyi Liew, Nurul Illya Muhamad Fauzi, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Huda Abdullah
Summary: The rapid and specific detection of dopamine is crucial for diagnosing neurodegenerative diseases. In this study, a sensor chip using graphene oxide was developed for surface plasmon resonance (SPR) sensors, which exhibited excellent performance with high sensitivity (0.2148 degrees /pM), affinity constant (2.148 TM-1), and precision (0.125% RSD). The plasmonic based sensor demonstrated the potential for real time detection of dopamine within 5 minutes, along with reproducibility, repeatability, selectivity, and storage stability.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Faten Bashar Kamal Eddin, Yap Wing Fen, Josephine Ying Chyi Liew, Hong Ngee Lim, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Nur Alia Sheh Omar
Summary: Thin films have vast applications in optics and other fields and must meet specific requirements for thickness, optical properties, morphology, and other characteristics. This study used surface plasmon resonance (SPR) technique to accurately measure the thickness and analyze the optical characteristics of graphene oxide/gold (GO/Au) multilayered structure in contact with dopamine (DA).
Article
Optics
Hazwani Suhaila Hashim, Yap Wing Fen, Nur Alia Sheh Omar, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Nurul Illya Muhamad Fauzi, Jaafar Abdullah, Mohd Adzir Mahdi
Summary: By adding graphene quantum dots to the gold thin film, the sensing capabilities of the surface plasmon resonance sensor for phenol have been significantly improved. The gold-graphene quantum dots thin film has a lower limit of detection and higher sensitivity, and exhibits excellent selectivity towards phenol.
OPTICS AND LASER TECHNOLOGY
(2024)
