Article
Chemistry, Analytical
LiangLiang Liu, Serhiy Korposh, David Gomez, Ricardo Correia, Barrie R. Hayes-Gill, Stephen P. Morgan
Summary: This work presents a functionalized optical fibre probe with 'cotton-shaped' gold-silica nanostructures for monitoring relative humidity (RH). The sensor utilizes the localized surface plasmon resonance (LSPR) of self-assembled nanostructures and demonstrates a high sensitivity to RH after optimization. The plasmonic hybridization mode sensor exhibited excellent linearity, reversibility, and fast response and recovery times.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Optics
Alkeos Stamatelatos, Maria Tsarmpopoulou, Dimitrios Geralis, Alexandros G. G. Chronis, Vagelis Karoutsos, Dimitrios Ntemogiannis, Dionysios M. M. Maratos, Spyridon Grammatikopoulos, Mihail Sigalas, Panagiotis Poulopoulos
Summary: In this work, self-assembled gold nanoparticles were fabricated on heated glass substrates and covered with different polymers. The localized surface plasmon resonances of polymer-covered nanoparticles were recorded and analyzed, showing variations in width, intensity, and position according to factors such as nanoparticle size and refractive index of the polymer. The experimental results were justified and compared with rigorous theoretical calculations.
Article
Green & Sustainable Science & Technology
Xiyu Yu, Maoquan Huang, Xinyu Wang, Qie Sun, G. H. Tang, Mu Du
Summary: This study introduces an optical selectivity aerogel by doping with gold/silver nanoparticles and predicts its radiative properties. The results show that the morphology, aspect ratio, size, and doping concentration of nanoparticles significantly affect the spectral selectivity of the hybrid aerogels.
Article
Engineering, Electrical & Electronic
Pradeep Bhatia, S. S. Verma, M. M. Sinha
Summary: In this study, the nanogap effect on plasmonic behaviors of magneto-plasmonic dimer nanoparticles was analyzed using DDA simulation. The results showed that the nanogap variation caused a redshift in the emitted wavelength, and the nanoparticles in edge-to-edge configuration exhibited higher field enhancement.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Anastasiia A. Sapunova, Yulia I. Yandybaeva, Roman A. Zakoldaev, Alexandra V. Afanasjeva, Olga V. Andreeva, Igor A. Gladskikh, Tigran A. Vartanyan, Daler R. Dadadzhanov
Summary: Chiral plasmonic nanostructures can be induced in achiral ensembles of gold nanoparticles through irradiation with circularly-polarized light. Embedding the particles in a nanoporous silicate matrix enhances the chirality, and selectively modifying them with circularly-polarized light results in ensemble of plasmonic metal nanoparticles demonstrating circular dichroism.
Article
Nanoscience & Nanotechnology
Nhat M. Ngo, Hung-Vu Tran, T. Randall Lee
Summary: The emergence of plasmonic nanostars has enabled a wide range of advanced technologies with great potential. Their superior surface-to-volume ratios and intensely amplified electric fields make them ideal for various applications. However, further study and development are still needed due to the nascency of this unique class of nanostructures.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Giuliano Coletta, Vincenzo Amendola
Summary: Combining plasmonic (gold, silver) and latex nanoparticles can improve the performance of immuno-turbidimetric assays without compromising the measurement dynamic range, providing a successful strategy to enhance the detection limit and maintain all the advantages of homogeneous immuno-turbidimetric assays.
Article
Engineering, Electrical & Electronic
Akanksha Bhardwaj, Pradeep Bhatia, Suram Singh Verma
Summary: This study focuses on the optical properties of gallium alloy nanoparticles in liquid plasmonics. The effects of different core-shell structures on localized surface plasmon resonance are investigated. Mie theory and discrete dipole approximation methods are used to analyze the optical behavior of gallium alloys of various sizes and shapes. The results show that GaAg and GaAl alloys exhibit good plasmonic behavior and can be used as alternative materials to GaIn in energy storage devices and soft electronics.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Suratun Nafisah, Marlia Morsin, Rahmat Sanudin, Nur L. Razali, Zainiharyati Mohd Zain, Mitra Djamal
Summary: This study investigates the effects of surface density and aspect ratio of gold nanobipyramids (GNBPs) on the performance of localized surface plasmon resonance (LSPR)-based sensors. The experimental results show a linear relationship between the mean surface density and aspect ratio of GNBPs and the sensitivity of the LSPR-based sensor. The highest sensitivity is achieved with a surface density of 80.02% +/- 0.86% and an aspect ratio of 2.58 +/- 0.04. Additionally, this sample exhibits clear response recovery behavior and stable repeatability.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Marta Rubio-Camacho, Maria Jose Martinez-Tome, Carlos Cuestas-Ayllon, Jesus M. de la Fuente, Rocio Esquembre, C. Reyes Mateo
Summary: A fast and environmentally-friendly method has been developed for the synthesis of gold nanoparticles (AuNPs) on thermosensitive liposomes. The arrangement of the AuNPs can be controlled and tuned by the lipid phase, charge, and synthesis temperature. The resulting nanohybrids show plasmon peaks within the visible/near-infrared region and retain the physical properties of the liposomes, making them excellent candidates for light-mediated therapies with controlled drug delivery capacity.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2023)
Article
Optics
Elham Ilbeygi, Mohammadmehdi Jahanbakhshian, Maghsoud Arshadi Pirlar, Rouhollah Karimzadeh
Summary: This study describes a plastic optical fiber sensor covered with spherical gold nanoparticles for detecting magnetic fields based on surface plasmon resonance. By recording the intensity of light output from the fibers with a smartphone, the impact of magnetic fields on the output light intensity of the fiber is confirmed.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jingjing Guo, Ce Shang, Shuo Gao, Yongbiao Zhang, Bo Fu, Lijun Xu
Summary: A flexible optical tactile sensor is developed using a plasmonic optical fiber made from gold nanoparticles and elastomers. It can accurately sense contact force and convert mechanical stimuli into interpretable light signals with low hysteresis and adjustable sensitivity. The sensor is capable of real-time monitoring of blood pressure, respiration, and tactile mapping of hand motions.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Qiushi Zhang, Ruiyang Li, Eungkyu Lee, Tengfei Luo
Summary: The study reveals that NPs deposited on the transparent substrate by optical forces play a key role in the nucleation of photothermal surface bubbles. The formation of surface bubbles is influenced by the different laser power density thresholds depending on whether the surface is facing or facing away from the light propagation direction.
Review
Biotechnology & Applied Microbiology
Jinghua Tai, Shuang Fan, Siqi Ding, Lishen Ren
Summary: Gold nanoparticles play an important role in biomedical research and can be used to fabricate optical biosensors, improving the sensitivity and specificity of detection devices. These sensors based on gold nanoparticles have the potential for cancer protein detection.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Pradeep Bhatia, S. S. Verma, M. M. Sinha
Summary: This work investigates the plasmonic properties of magnetic and liquid nanoparticles coated with aluminium in egg-like/multilayer structures. The optical spectra of multilayer nanoparticles with different core-shell or bi-layer configurations and egg-like or multilayer nanostructures are studied. The results show that variations in materials types and size parameters significantly affect the LSPR peak position, intensity, and broadening. The study also reveals that the response of core-shell and egg-like/multilayer nanostructures has potential applications in stretchable plasmonic devices, solar cells, and light absorption-based applications.
Article
Electrochemistry
Muhammad Nurdin, Muhammad Zakir Muzakkar, Maulidiyah Maulidiyah, Cici Sumarni, Thamrin Azis, Ratna Ratna, Muhammad Natsir, Irwan Irwan, La Ode Agus Salim, Akrajas Ali Umar
Summary: In this study, a new catalyst design was demonstrated to efficiently degrade Reactive yellow 105 dye through photoelectrocatalytic degradation under visible light irradiation. The results showed that the new photocatalyst exhibited significantly higher degradation rate than the pristine photocatalyst under both UV and visible light irradiation.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Marjoni Imamora Ali Umar, Muhammad Nurdin, Atiek Rostika Noviyanti, Dahyunir Dahlan, Ari Sulistiyo Rini, Akrajas Ali Umar
Summary: Ultra-thin Au nanoplates exhibit exceptional electrocatalytic properties due to their unique two-dimensional electron confinement. The analysis of these nanoplates shows that they offer significantly higher electrocatalytic performance in the redox reaction of cytochrome c compared to Au nanospheres, thanks to the two-dimensional arrangement of (111) surface atoms, the presence of high-energy atoms at the edge, and both transversal and longitudinal surface plasmon resonance. This discovery suggests that Au nanoplates could be extensively applied in organic reactions, sensing, and surface plasmon resonance.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Analytical
Xiaomei Chen, Mingming Yin, Rui Ge, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen
Summary: Sensitive, portable detection methods for foodborne pathogens are important for early warning and prevention of diseases. This study used AgBiS2 nanoflowers and Cu2O nanocubes to develop a novel photoelectrochemical immunosensor. By combining n-type AgBiS2 nanoflowers and p-type Cu2O nanocubes with monoclonal and polyclonal antibodies, a highly efficient photocurrent-switching system was formed on a paper-based electrode. The NIR PEC immunoassay exhibited a low detection limit and could be used for point-of-care testing of E. coli O157:H7.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
U. A. Kamarulzaman, M. Y. A. Rahman, M. S. Su'ait, A. A. Umar
Summary: Preparation of NiPd-rGO cathode via LPD technique and its effect on the performance of DSSC have been studied. The deposition temperature of NiPd has been found to significantly influence the morphology, elemental composition, and optical transmittance of the samples. The DSSC device using NiPd-rGO cathode prepared at a deposition temperature of 60 degrees C shows the highest PCE of 3.07% due to its lowest R-ct and highest R-cr.
Article
Chemistry, Multidisciplinary
La Ode Agus Salim, Muhammad Zakir Muzakkar, Ahmad Zaeni, Maulidiyah Maulidiyah, Muhammad Nurdin, Siti Naqiyah Sadikin, Jaenuddin Ridwan, Akrajas Ali Umar
Summary: Doping TiO2 with sulfur (S) improves the photoelectrical properties of the photoanode, increasing the power conversion efficiency of dye-sensitized solar cells (DSSC).
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Nurdin, Abdul Haris Watoni, Muhammad Natsir, Sarifa Rahmatilah, Maulidiyah Maulidiyah, Dwiprayogo Wibowo, La Ode Agus Salim, Siti Naqiyah Sadikin, Catherina Manukpadang Bijang, Akrajas Ali Umar
Summary: A novel photoelectrocatalyst of Se doped-TiO2/Ti nanotube arrays (Se@TiO2/Ti-NTAs) was prepared and exhibited high-efficiency degradation of pollutants under visible light irradiation. The Se@TiO2/Ti-NTAs promoted active photoelectron transfer and active radical formation for rapid pollutant degradation. This new photoelectrode shows potential for environmental pollution treatment.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Optics
U. A. Kamarulzaman, M. Y. A. Rahman, M. S. Su'ait, A. A. Umar
Summary: In this study, NickelPalladium-reduced graphene oxide (NiPd-rGO) films were prepared and used as free-platinum (Pt) counter electrode for dye-sensitized solar cell (DSSC) through liquid phase deposition technique. The influence of Pd content on the properties of the films was studied, including structure, optical transmission, surface morphology, and elemental compositions. The performance parameters of the device were significantly affected by the Pd content, with the device using NiPd-rGO counter electrode at Ni:Pd ratio of 20:2 demonstrating the highest efficiency of 3.09%.
Article
Energy & Fuels
Fatemeh Behrouznejad, Xiaoguo Li, Akrajas Ali Umar, Xin Zhang, Rouhollah Khosroshahi, Siti Khatijah Md Saad, Irfan Ahmed, Nima Taghavinia, Yiqiang Zhan
Summary: In this research, the effect of different mechanisms on IPCE spectra and the difference between Jsc values from J-V and IPCE curves of n-i-p PSCs were investigated. The results showed that removing the ETL did not change the IPCE spectrum significantly, while removing the HTL resulted in a substantial decrease in IPCE value and deformation in the shape of the spectrum. Additionally, the nonlinearity of the device's characteristics with light intensity was shown to affect the difference between Jsc values from J-V and IPCE curves.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Muhammad Nurdin, Ilham Ilham, Maulidiyah Maulidiyah, Muh. Zakir Muzakkar, Dwiprayogo Wibowo, Zul Arham, La Ode Agus Salim, Irwan Irwan, Catherina Bijang, Akrajas Ali Umar
Summary: The effect of Te doping on the TiO2/Ti nanotube arrays (NTAs) for photoelectrochemical COD detection was investigated. The Te doping enhanced the photoelectrocatalytic properties of the TiO2/Ti NTAs electrode, as demonstrated by improved linearity, accuracy, and repeatability in measuring test compound chemicals. The Te-TiO2/Ti NTAs electrode exhibited higher linearity up to 10 μM concentration compared to the pristine TiO2/Ti NTAs system (up to 5 μM). It also provided higher accuracy (up to 100% fit to theoretical value) and lower repeatability (1.8% RSD) compared to the TiO2/Ti NTAs electrode (less than 80% accuracy, 2% RSD).
Article
Chemistry, Multidisciplinary
Marjoni Imamora Ali Umar, Annisa Zahra Ahdaliza, Salah M. M. El-Bahy, Nur Aliza, Siti Naqiyah Sadikin, Jaenudin Ridwan, Abang Annuar Ehsan, Mohammed A. A. Amin, Zeinhom M. M. El-Bahy, Akrajas Ali Umar
Summary: The crystalline properties of perovskite film were optimized through annealing treatment under high humidity conditions. The resulting perovskite solar cells exhibited a power conversion efficiency of 17.77%, with a carrier lifetime of 25 ns and low interfacial charge transfer resistance. These findings provide guidance for the industrialization of perovskite solar cells.
Article
Multidisciplinary Sciences
Setia Budi, Mari Takahashi, Mega Gladiani Sutrisno, Wisnu Ari Adi, Zahra Fairuza, Budhy Kurniawan, Shinya Maenosono, Akrajas Ali Umar
Summary: A pure-phase Cu2O film photocatalyst was successfully prepared using the electrodeposition technique. The deposition temperature was found to influence the phase evolution and photocatalytic activity of the film. A pure Cu2O film with a narrow optical bandgap energy of 1.96 eV was obtained at 75°C, while multi-faceted crystals were formed at 45°C. The photocatalytic activity of the Cu2O film increased with increasing deposition temperature due to the rise in photoelectrochemical response, decrease in resistance charge transfer, and growth of a high catalytic activity facet.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Jinjin Wang, Silun Li, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen, Xiaomei Chen
Summary: To prevent contamination of cereals by mycotoxins, a sensitive and rapid method for mycotoxin detection is essential. In this study, a screening-capture-integrated electrochemiluminescence (ECL) aptasensor based on mesoporous silica films (MSFs) was developed for the ultrasensitive and highly selective detection of deoxynivalenol (DON) in wheat. The sensor combines size screening and specific capture to achieve quantitative detection of DON, providing a new approach for early detection of wheat mildew.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
N. A. S. Aziz, M. Y. A. Rahman, A. A. Umar, E. R. Mawarnis
Summary: This study focuses on the use of iridium-palladium (Ir-Pd) binary alloy as a counter electrode (CE) for dye-sensitized solar cells (DSSC). By adjusting the concentration of hydrogen hexachloroiridate (IV) hydrate (H2Cl6Ir·H2O), the property and performance of the CE were investigated. The device with Ir-Pd CE containing 0.7 mM H2Cl6Ir·H2O demonstrated the highest power conversion efficiency (PCE) compared to the device with platinum (Pt) CE.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Analytical
Hanjie Dai, Mingming Yin, Shumin Zhang, Jie Wei, Tianhui Jiao, Qingmin Chen, Quansheng Chen, Xi Chen, Munetaka Oyama, Xiaomei Chen
Summary: In this study, a novel paper-based photoelectrochemical sensor was developed for rapid and sensitive detection of Staphylococcus aureus. By utilizing specific modifications, the capture of S. aureus with high specificity was achieved, and signal enhancement was achieved using nanoflower probes. The sensor demonstrated rapid and ultrasensitive detection capabilities.
Article
Chemistry, Applied
Xueqi Lin, Rui Ge, Jie Wei, Tianhui Jiao, Qingmin Chen, Munetaka Oyama, Quansheng Chen, Xiaomei Chen
Summary: This study developed a magnetic-encoded fluorescent nanosphere-based immunosensor for simultaneous detection of multiple mycotoxins in wheat. The sensor showed high accuracy, selectivity, and sensitivity.
