Article
Chemistry, Analytical
Seowon Lee, Won Jae Kim, Minsub Chung
Summary: The importance of specific DNA detection is discussed in various fields, with a focus on label-free DNA sensing using techniques like electrochemical impedance spectroscopy and quartz crystal microbalance. The study reveals the etching effect of the ferro/ferricyanide redox couple on gold electrodes, and how experimental parameters and probe-DNA concentrations can be optimized for signal amplification in detecting complementary DNA.
Article
Chemistry, Analytical
Yeeun Kim, Dahyun Kang, Seokgyu Kim, Eunchae Hong, Moongyu Jang
Summary: In this study, an impedance biosensor capable of real-time monitoring of NIH/3T3 cell growth and drug reactions was developed and proved to be effective. The capacitance contributions of cells existing on and between electrodes were investigated, and it was found that the cells on electrodes have a smaller contribution to the overall cell capacitance. Therefore, minimizing the electrode area and maximizing the electrode spacing is a promising design guide for accurately measuring cell capacitance.
Article
Chemistry, Analytical
Rabiaa Elkarous, Afrah Bardaoui, Jerome Borme, Nabil Sghaier, Pedro Alpuim, Diogo M. F. Santos, Radhouane Chtourou
Summary: This study proposes a high-performance asymmetric gold/graphene/platinum photodetector that operates without bias. It incorporates interdigitated metallic contacts to enhance the separation and collection of photocarriers. By utilizing chemical vapor deposition and electron-beam lithography, three devices with different dimensions were fabricated and evaluated for their photoresponsivities at different wavelengths. The 100 μm device exhibited the highest photoresponsivity of 358 A/W at 400 nm illumination. These findings demonstrate the potential of the proposed design to increase the active area, improve light absorption, and achieve efficient separation and collection of photogenerated carriers, making it highly relevant for optoelectronic applications.
Article
Chemistry, Analytical
Yung-Kai Lin, Hsing-Ju Wu, Nguyen Van Hieu, Pei-Yi Chu, Thi Vien Thao Do, Fiona Yan-Dong Yao, Thien Luan Phan, Congo Tak Shing Ching
Summary: The label-free biosensor is an effective tool for early detection of pathogens. In this study, a biorecognition element-free sensor was developed, which can reliably quantify Escherichia coli within a certain range of measurement.
Article
Polymer Science
A. Nirmal Paul Raj, T. Adinaveen, R. Biju Bennie, C. Joel, S. Hari Kengaram, P. Leema Sophie
Summary: In this study, the research focused on MoO3 nanoparticles doped with copper as an efficient supercapacitor electrode material for the development of electrochemical charge storage devices. Through various analysis methods including powder X-ray diffraction, scanning electron microscopy, infrared and Raman spectroscopy, UV-vis diffuse reflectance spectroscopy, and measurement of specific surface area, the structure and performance of the synthesized nanoparticles were investigated. The results showed that 5% wt Cu doped MoO3 nanoparticles exhibited the highest specific capacitance value.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Vesselin Donchev, Davide Regaldo, Stefan Georgiev, Aleksandra Bojar, Mattia da Lisca, Kiril Kirilov, Jose Alvarez, Philip Schulz, Jean -Paul Kleider
Summary: In this study, perovskite (PVK) films deposited directly on n-type crystalline Si substrates were investigated using two operating modes of the surface photovoltage (SPV) method: the metal-insulator-semiconductor (MIS) mode and the Kelvin probe force microscopy (KPFM). The MIS mode allowed for a consecutive study of carrier generation, transport, and recombination processes in Si, PVK/Si interface, and the PVK layer and its surface. The PVK optical absorption edge and energy band bending at the PVK/n-Si interface were observed and analyzed. Aging effects on the PVK/n-Si interface were also studied.
Article
Chemistry, Analytical
Christopher Beale, Antonio Altana, Stefanie Hamacher, Alexey Yakushenko, Dirk Mayer, Bernhard Wolfrum, Andreas Offenhausser
Summary: This article investigates the use of inkjet printed and flash lamp annealed Ta2O5 as a capacitive pH sensing layer in pH sensors. The study shows that the double layer capacitance changes with pH in a specific range, and the sensor may have potential applications in other fields.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Review
Chemistry, Analytical
Perrine Robin, Sandrine Gerber-Lemaire
Summary: Despite their high sensitivity and miniaturization potential, the reproducibility and specificity of biosensors are still limited for clinical use. This article provides an updated overview of capacitive biosensors in medical applications and summarizes the strategies for fabricating sensing surfaces. It also discusses the characteristics governing the performance of sensing surfaces and recent developments to overcome their current limitations.
Article
Materials Science, Ceramics
T. Prakash, E. Ranjith Kumar, G. Neri, Tahani M. Bawazeer, Kholood Alkhamis, Alaa Munshi, Salman S. Alharthi, Nashwa M. El-Metwaly
Summary: Microwave synthesis method was used to prepare CdO nanoparticles with PEG, NH3 and NaOH as co-reagents. The role of co-reagents on the microstructural and morphological study was evaluated through XRD, SEM, TEM and EDS. The pH of the solution, determined by the co-reagent used, was found to be a key parameter affecting the morphology of CdO nanostructures.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Zahraa AL-Ghaus, Alireza Akbarinejad, Bicheng Zhu, Jadranka Travas-Sejdic
Summary: The study describes the preparation of novel PAM/SA-PLum/Pom hybrid hydrogels for use as electrodes in supercapacitors, showing enhanced electrochemical performance by combining PLum pseudocapacitance with Pom reversible redox activity. A flexible supercapacitor device with good capacitance retention was fabricated as proof-of-concept. These hybrid hydrogels are considered promising energy storage materials for wearable and flexible electronics.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Biochemistry & Molecular Biology
Alexey V. V. Butko, Vladimir Y. Y. Butko, Yurii A. A. Kumzerov
Summary: The correct formula for double-layer capacitance (C-dl) in graphene interfaces with liquid is controversial. We proposed a model that considers the capacitance of a charge accumulation layer (C-ca) and a capacitance-limiting edge region (C-e) with negligible electric susceptibility and conductivity. These capacitances are connected in series, and C-dl can be obtained from 1/C-dl = 1/C-ca + 1/C-e. Experimental results on the graphene/water interface capacitance imply that the distance from charge carriers in graphene to molecular charges at the interface is around 0.05-0.1 nm. The generalized model predicts a capacitance upper limit of approximately 18 μF/cm2.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Botan Jawdat Abdullah
Summary: A new approach based on density functional theory with hybrid functional (HSE06) and modeled lattice expansion of semiconductors has been studied to determine band gap energy for nanoparticles and nanostructures. It was found that as the size decreases, band gap energy increases due to lattice parameter changes, and the lattice parameters are closely related to the size.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Thien Luan Phan, Nguyen Van Hieu, Jing-Jenn Lin, Hsing-Ju Wu, Pei-Yi Chu, Chin-Sung Hsiao, Fiona Yan-Dong Yao, Yung-Kai Lin, Congo Tak Shing Ching
Summary: This study reports the development of a sensor for detecting the presence of ketamine in whiskey, using admittance and capacitance spectrometry. The sensor is capable of detecting ketamine in concentrations as low as 6.25 ng/μL, and quantifying the measured admittance or capacitance data. The sensitivity and limit of detection for admittance were 300 μΩ(-1)/log (ng/μL) and 0.16 ng/μL, respectively, while for capacitance they were 2 nF/log (ng/μL) and 0.73 ng/μL, at frequencies of 18 kHz and 7.69 MHz.
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
(2023)
Article
Chemistry, Multidisciplinary
K. K. Supin, Parvathy P. M. Namboothiri, M. Vasundhara
Summary: The present study focuses on the green synthesis of zinc oxide nanoparticles using a novel leaf extract and the photocatalytic degradation of a dye. The analysis of the synthesized nanoparticles was conducted using various techniques. The study also investigated the crystallinity and crystallite size of the nanoparticles and evaluated their photocatalytic activity for dye degradation. The results showed high efficiency and potential for wastewater treatment.
Article
Chemistry, Physical
S. Meenakshi, R. Saravanan, N. Srinivasan, D. Dhayanithi, Nambi Venkatesan Giridharan
Summary: The magneto-electric ceramic composite of (1-x)BaTiO3 + xZnFe(2)O(4) (x = 0.2, 0.4, 0.6, 0.8) was synthesized by solid state method, displaying complex electrical and magnetic properties. As the ferrite content increased, the composite transitioned from lossy capacitance to resistive capacitance, with an increase in dielectric constant but also dielectric loss. The Ti-O bond played a significant role in the electrical characterization, while the composite exhibited small ferromagnetic properties, with saturation magnetization increasing with ferrite content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Analytical
Palaniyandi Velusamy, Chia-Hung Su, Palaniappan Ramasamy, Viswanathan Arun, Narayanan Rajnish, Pachaiappan Raman, Vaseeharan Baskaralingam, Sakkarapalayam Murugesan Senthil Kumar, Subash C. B. Gopinath
Summary: Biomarkers are biological molecules associated with physiological changes of the body, aiding in the detection and prediction of disease onset. Breath analysis, as a noninvasive, rapid, and inexpensive method, has become a research focus in early detection of health issues.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Xuekai Zhao, Subash C. B. Gopinath, Weichao Zhao
Summary: An immunosensor based on a multiwalled carbon nanotube-modified surface was developed in this study to quantify the CRP level in blood. By constructing specific anti-CRP on the multiwalled carbon nanotube surface, the sensor exhibited a dose-dependent linear pattern in the range of 200 to 3000 pM and was able to identify CRP in biological samples.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Hu Hui, Subash C. B. Gopinath, Zool H. Ismail, Yeng Chen, K. Pandian, Palaniyandi Velusamy
Summary: Myocardial infarction (MI) is a life-threatening condition that can cause cardiac arrest and organ damage. Current diagnostic techniques are not sensitive enough for early detection, but blood biomarker-based diagnosis, specifically the measurement of cardiac troponin I (cTnI), provides a potential solution. In this study, a sensor based on interdigitated electrodes was developed and used to detect cTnI. The use of aptamer-conjugated gold nanoparticles and detection antibodies in a sandwich pattern significantly improved the sensitivity of the detection. The developed sensor showed promising results for diagnosing MI.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Muhammad Nur Aiman Uda, Subash C. B. Gopinath, Uda Hashim, Muhammad Nur Afnan Uda, Tijjani Adam, Nor Azizah Parmin, Sreeramanan Subramaniam, Suresh V. Chinni, Veeranjaneya Reddy Lebaka, Ramachawolran Gobinath
Summary: Rice is increasingly exposed to inorganic arsenic, affecting half of the world population as rice consumers. This study investigated the effects of silica and graphene nanomaterials treatment on varied arsenic levels, and found that silica nanoparticles showed the highest inhibition on arsenic accumulation. Arsenic adversely affected plant growth and even caused death at high concentrations, but silica nanoparticles demonstrated potential in reducing consumer health risks.
Review
Biotechnology & Applied Microbiology
Theivasanthi Thirugnanasambandan, Subash C. B. Gopinath
Summary: The storage of food grains against fungal infection is a major challenge for farmers, but nanotechnology offers a solution by replacing synthetic fungicides with inorganic nanoparticles such as silver and zinc oxide, as well as green synthesized nanoparticles. Plant extracts and essential oils show effective antifungal properties, and nanoparticles can be impregnated in packaging materials for safe food storage. This overview discusses the nanomaterials-mediated protection of food materials from mycotoxin contamination and its impact on the environment.
Article
Materials Science, Multidisciplinary
Fadila Belkharroubi, Mokhtar Bourdim, Ahmed Maizia, Nawal Belmiloud, Friha Khelfaoui, Zakaria Smahi, Keltouma Boudia, Miloud Benchehima, Saliha Azzi, Mohamed Ameri, Y. Al-Douri, Ali Abu Odeh
Summary: The structural, electrical, magnetic, and elastic characteristics of the Mn2OsSn full-Heusler compound were studied using the FP-LAPW method. Different exchange and correlation potentials were calculated, revealing the compound's negative formation energy and potential for indefinite persistence. The compound exhibited a half-metallic feature in its complete Heusler ferromagnetic state and showed metallic ferromagnetic behavior with high polarization in its inverse cubic structure, making it a promising candidate for spintronic applications.
PHILOSOPHICAL MAGAZINE
(2023)
Review
Green & Sustainable Science & Technology
Wan Yuen Tan, Subash C. B. Gopinath, Periasamy Anbu, Ahmad Radi Wan Yaakub, Sreeramanan Subramaniam, Yeng Chen, Sreenivasan Sasidharan
Summary: With the development of bionanotechnology, the field of nanobiocatalysts has grown rapidly and transformed various nanomaterials into novel nanocarriers for enzyme immobilization. Nanotubes, nanofibers, nanopores, nanoparticles, and nanocomposites have been successfully used as nanocarriers. The combination of enzymes and nanocarriers through different immobilization techniques has attracted attention due to their exceptional catalytic performance, stability, and reusability. The review discusses enzyme immobilization on nanocarriers and highlights the techniques, properties, preparations, and applications of nanoimmobilized enzymes.
Review
Biotechnology & Applied Microbiology
Hussaini Adam, Subash C. B. Gopinath, M. K. Md Arshad, Tijjani Adam, N. A. Parmin, Irzaman Husein, Uda Hashim
Summary: In severe cases, Parkinson's disease causes uncontrolled movements known as motor symptoms such as dystonia, rigidity, bradykinesia, and tremors. Parkinson's disease also causes non-motor symptoms such as insomnia, constipation, depression and hysteria. Disruption of neural networks in the substantia nigra pars compacta is a major cause of motor symptoms in Parkinson's disease, highlighting the need for better methods of detection. Improved diagnosis and treatment of Parkinson's disease can help avoid some of its devastating symptoms.
Review
Microbiology
Suaidah Ramli, Yuan Seng Wu, Kalaivani Batumalaie, Rhanye Mac Guad, Ker Woon Choy, Ashok Kumar, Subash C. B. Gopinath, Md. Moklesur Rahman Sarker, Vetriselvan Subramaniyan, Mahendran Sekar, Neeraj Kumar Fuloria, Shivkanya Fuloria, Suresh V. Chinni, Gobinath Ramachawolran
Summary: This review focuses on the therapeutic efficacy and molecular mechanisms of Withania somnifera (WS) extracts and their phytochemicals against SARS-CoV-2 infection. It also discusses the use of molecular docking in developing potential inhibitors from WS to target the virus and host cell receptors. Additionally, the review explores the use of nanoformulations or nanocarriers in enhancing WS delivery for improved bioavailability and treatment efficacy.
Article
Infectious Diseases
Valiappan Ranjutha, Yeng Chen, Lamya Ahmed Al-Keridis, Mitesh Patel, Nawaf Alshammari, Mohd Adnan, Sumaira Sahreen, Subash C. B. Gopinath, Sreenivasan Sasidharan
Summary: Polyalthia longifolia is a medicinal plant used in traditional medicine for skin diseases. This study confirms the synergistic antimicrobial activity of Polyalthia longifolia methanol leaf extract (MEPL) and ceftriaxone against methicillin-resistant Staphylococcus aureus (MRSA) bacteria. The combination of MEPL and ceftriaxone significantly reduces the minimum inhibitory concentration of ceftriaxone and inhibits the expression of the resistant mecA gene in MRSA.
Review
Multidisciplinary Sciences
A. L. Olatomiwa, Tijjani Adam, C. O. Edet, A. A. Adewale, Abdullah Chik, Mohammed Mohammed, Subash C. B. Gopinath, U. Hashim
Summary: This review provides a comprehensive overview of articles on the electronic and optical properties of graphene using density functional theory and machine learning approaches. It summarizes the thermodynamic stability parameters of various doped graphene systems and discusses the strengths and uncertainties of the used models and potentials. Future studies should explore the thermal properties, heterostructure modeling, superconducting behavior, and optimization of DFT models to enhance the potential of graphene.
Article
Green & Sustainable Science & Technology
Roslaili Abdul Aziz, Mok Yiwen, Mawaddah Saleh, Mohd Nazry Salleh, Subash C. B. Gopinath, Sunny Goh Eng Giap, Suresh V. Chinni, Ramachawolran Gobinath
Summary: This study evaluated the accumulation of trace elements, such as copper, zinc, and lead, in paddy fields and soil, and analyzed their transfer to rice plants. The findings show that the accumulation of heavy metals in soil varies depending on the location and the order of accumulation differs for different metals. The study also found that soil properties and metal abundance can influence the growth characteristics of rice plants.
Article
Food Science & Technology
Raja Hasnida Raja Hashim, Ahmad Anas Nagoor Gunny, Sam Sung Ting, Subash C. B. Gopinath, Yeong Yin Fong, Sunil Pareek, Muaz Mohd Zaini Makhtar, Hafiza Shukor
Summary: This study investigated the effect of Coleus aromaticus essential oil (CAEO) on an active film made of polylactic acid, chitosan, and cellulose nanocrystal for fruit packaging. The addition of CAEO improved the mechanical properties and antioxidant activity of the film, and exhibited inhibitory effects against pathogenic fungus. The results suggest that the PLA/Cs/CNC/CAEO films can enhance microbial safety and prolong the shelf life of fruits, potentially replacing petroleum-based plastics for fruit packaging applications.
JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION
(2023)
Article
Multidisciplinary Sciences
Mohammed Mohammed, Jawad K. Oleiwi, Anwar Ja 'afar Mohamad Jawad, Aeshah M. Mohammed, Azlin F. Osman, Rozyanty Rahman, Tijjani Adam, Bashir O. Betar, Subash C. B. Gopinath, Omar S. Dahham
Summary: This study aimed to enhance the flexural properties of unsaturated polyester/kenaf fiber nanocomposites by using zinc oxide nanoparticles for surface treatment. The findings showed that the addition of ZnONPs significantly improved the performance of the composites, with 2% being the optimal loading, and surface treatment with ZnONPs resulted in kenaf fibers with improved flexural properties.
Article
Engineering, Biomedical
S. Iswarya, T. Theivasanthi, Subash C. B. Gopinath
Summary: Sodium alginate/hydroxyapatite/nanocellulose (SA/HA/NC) nanocomposite films were prepared for bone tissue engineering using a simple solution casting method. The structure and properties of the composite films were studied by XRD, SEM, EDAX, and FTIR analysis. The results showed that the inclusion of different concentrations of NC improved the tensile strength of the biopolymer film. These bionanocomposite films have the potential to be used as biomaterials in bone tissue engineering.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
