Article
Spectroscopy
Maria Gabriela Fernandez-Manteca, Marina Martinez-Minchero, Asier Garcia-Escarzaga, Alain A. Ocampo-Sosa, Jesus Mirapeix, Jose J. Valdiande, Jose Miguel Lopez-Higuera, Luis Rodriguez-Cobo, Adolfo Cobo
Summary: The LIBS technique requires spectroscopic analysis of the light emitted by a laser-induced plasma plume. One challenge is the significant shot-to-shot variations of the plume's inhomogeneities, position, and morphology, especially when using multichannel CCD spectrometers. This study evaluates the performance of various collection optics in terms of capturing efficiency and channel-to-channel variations due to changes in plasma morphology.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Meteorology & Atmospheric Sciences
Florian Richter, Corneli Keim, Jerome Caron, Jasper Krauser, Dennis Weise, Mark Wenig
Summary: Wide-field spectrometers for Earth observation missions require in-flight radiometric calibration using the Sun as a known reference. Diffusers are used to scatter incoming light for homogeneous illumination, but can introduce interference patterns known as speckles leading to spectral features. Various methods have been implemented to characterize these features, with a proposed measurement technique based on acquiring monochromatic speckles for predicting spectral features in imaging spectrometers with few input parameters.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Chemistry, Multidisciplinary
Seung-Jun Kim, In Cheol Yu, Dong-Joo Kim, Mojca Jazbinsek, Woojin Yoon, Hoseop Yun, Dongwook Kim, Fabian Rotermund, O-Pil Kwon
Summary: This study reports a new class of nonlinear optical organic crystals with an extremely large first hyperpolarizability. By incorporating a specific hydrogen-bonding synthon and an optimal selection of molecular anion, the crystals exhibit large macroscopic optical nonlinearity. These crystals show excellent performance in terahertz wave generation, with a wide flat-spectral-band and high-generation efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Aerospace
Felix N. Minta, Satoshi I. Nozawa, Kamen Kozarev, Ahmed Elsaid, Ayman Mahrous
Summary: This paper presents a detailed investigation of the spectral properties of band splitting type II radio bursts and their association with sunspot number. The study found that the analyzed type II shock height, magnetic field strength, CME/shock speed, and Alfvé n speed synchronize with the trajectory of the solar cycle 24. The study also revealed the highest electron density at the onset of the declining phase of solar cycle 24, and a bimodal distribution of type II bursts frequency with peaks in 2012 and 2015.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Piyush Jangid, Felix Ulrich Richter, Ming Lun Tseng, Ivan Sinev, Sergey Kruk, Hatice Altug, Yuri Kivshar
Summary: High-index dielectric subwavelength structures and metasurfaces can greatly enhance light-matter interactions through geometry-dependent optical resonances. However, these enhancements have a limitation in that they only operate within a narrow spectral range near resonant frequencies. This study introduces a practical approach to achieve spectrally tunable enhancement of light-matter interaction using resonance-gradient metasurfaces. By varying the geometrical parameters, the resonant frequencies of the metasurfaces can be tuned. The metasurfaces consist of bone-like nanoresonators made of germanium, which support high-quality optical resonances in the mid-IR spectral range. This concept is applied to observe the resonant enhancement of multiple optical harmonics, providing wide spectral coverage.
ADVANCED MATERIALS
(2023)
Review
Multidisciplinary Sciences
Zongyin Yang, Tom Albrow-Owen, Weiwei Cai, Tawfique Hasan
Summary: Spectroscopic analysis is widely used in scientific research and industry, and the trend towards miniaturization is crucial for portability and in situ measurements. Advances in microspectrometer technology aim to achieve high performance and small footprint suitable for lab-on-a-chip systems, smartphones, and other consumer technologies, yet face challenges in improving spectral resolution as device dimensions shrink.
Article
Geosciences, Multidisciplinary
Matthias Heumesser, Olivier Chanrion, Torsten Neubert, Hugh J. Christian, Krystallia Dimitriadou, Francisco J. Gordillo-Vazquez, Alejandro Luque, Francisco Javier Perez-Invernon, Richard J. Blakeslee, Nikolai ostgaard, Victor Reglero, Christoph Koehn
Summary: The Atmosphere-Space Interactions Monitor measured Terrestrial Gamma-Ray Flashes (TGFs) and optical emissions related to lightning activity, finding that TGFs are associated with optical emissions and 90% of them occur at the onset of large optical pulses, supporting the leader-streamer mechanism for TGF generation.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Remote Sensing
Rebecca Del'Papa Moreira Scafutto, Harald van der Werff, Wim H. Bakker, Freek van der Meer, Carlos Roberto de Souza Filho
Summary: The study focused on evaluating the suitability of airborne imaging spectrometers for mapping CH4 emissions in the SWIR range, highlighting that the wavelength position of band centers is a key factor affecting CH4 mapping.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2021)
Article
Materials Science, Multidisciplinary
Maria Matiatou, Panagiotis Giannios, Spyridon Koutsoumpos, Konstantinos G. Toutouzas, George C. Zografos, Konstantinos Moutzouris
Summary: The experimental determination of refractive index for eleven different human tissue types using a prism-coupling refractometer and a simple Cauchy model is reported in this study. The model accurately reproduces the experimental data and enables prediction of tissue refractive index in the entire visible and near-infrared spectral range, as well as estimation of dispersion-related parameters like group velocity dispersion.
RESULTS IN PHYSICS
(2021)
Article
Optics
P. Jagodzinski, M. Pajek, D. Banas, A. Kubala-Kukus, J. Szlachetko, M. Cotte, M. Salome
Summary: The main advantage of wavelength-dispersive spectrometers in X-ray study lies in their high energy resolution. Monte-Carlo simulations are used to gather information about the characteristics of the main elements of the spectrometer, such as X-ray optics elements, crystals, and detectors. The simulations in this paper focus on X-ray tracing in parallel-beam wavelength-dispersive spectrometer equipped with polycapillary optics, showing good agreement with experimental data.
Review
Chemistry, Multidisciplinary
Wenjing Liu, You-Ling Chen, Shui-Jing Tang, Frank Vollmer, Yun-Feng Xiao
Summary: Optical microresonators have been widely studied for highly sensitive molecular detection and optical precision measurement. The combination of high quality factor and small mode volume in whispering-gallery mode microresonators enhances nonlinear light-matter interaction, enabling label-free molecule detection with ultrahigh sensitivity and specific spectral fingerprinting of molecules. These nonlinear optical sensors show promise for future research and applications in sensing technologies.
Article
Chemistry, Multidisciplinary
Jian Wang, Shuang Xiao, Wei Qian, Kai Zhang, Jun Yu, Xiuwen Xu, Gaopeng Wang, Shizhao Zheng, Shihe Yang
Summary: A filterless and self-driven perovskite narrowband photodetector with tunable bandgap based on defect-assisted charge collection narrowing mechanism is reported in this study, showing wide spectral response range and excellent detection performance. It has the potential for high-efficiency optoelectronic devices without external power sources.
ADVANCED MATERIALS
(2021)
Article
Optics
Thomas Zacharias, Liran Hareli, Alon Bahabad
Summary: Slow and fast light refer to light pulses moving at group velocities slower or faster than the speed of light in vacuum. Different methods have been developed to achieve slow and fast light, with the latest involving superoscillations and weak measurements of arrival time, allowing for applications in various fields such as telecommunication, interferometry, and laser radars.
LASER & PHOTONICS REVIEWS
(2021)
Article
Astronomy & Astrophysics
Fabian Klenner, Muhammad Umair, Sebastian H. G. Walter, Nozair Khawaja, Jon Hillier, Lenz Nolle, Zenghui Zou, Maryse Napoleoni, Arnaud Sanderink, Wilhelm Zuschneid, Bernd Abel, Frank Postberg
Summary: Spaceborne impact ionization mass spectrometers are crucial for exploring icy moons in the Solar System, and analogue experiments on Earth are essential for interpreting data from these instruments. A comprehensive and extendable database has been developed, containing laboratory mass spectra that can be compared with data from space missions and terrestrial techniques.
EARTH AND SPACE SCIENCE
(2022)
Article
Optics
Oussama Mhibik, Murat Yessenov, Lam Mach, Leonid Glebov, Ayman F. Abouraddy, Ivan Divliansky
Summary: We introduce a new optical component called rotated chirped volume Bragg grating (r-CBG) that can spatially resolve the spectrum of an incident light beam in a compact size without the need for free-space propagation or collimation. By rotating the Bragg structure, the relationship between the length and width of the r-CBG is severed, resulting in a significantly reduced footprint for the same bandwidth. We fabricate and characterize this device in multiple spectral windows, study its spectral resolution, and confirm its ability to resolve and recombine the spectrum using cascaded r-CBGs. This device has the potential to enable ultracompact spectrometers and pulse modulators.
Review
Materials Science, Multidisciplinary
Muheeb Ahmad Alkhalayfeh, Azlan Abdul Aziz, Mohd Zamir Pakhuruddin, Khadijah Mohammedsaleh M. Katubi, Neda Ahmadi
Summary: Solar energy technologies provide effective solutions for utilizing IoT-based applications, especially smart devices. Organic photovoltaics made from pi-conjugated carbon-based semiconductors have great potential for indoor applications but require enhancements in dim light absorption and bandgap material utilization. Additionally, the plasmonic effect of metallic nanoparticles is highlighted for improving the performance of OPVs.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Mohammed Ali Dheyab, Azlan Abdul Aziz, Mahmood S. Jameel, Nazila Oladzadabbasabadi
Summary: Nanotechnology, particularly the use of tin oxide nanoparticles (SnO(2)NPs), has emerged as a promising research area with broad applications. This review focuses on reviewing various synthetic routes for SnO(2)NPs preparation and highlights their physicochemical properties and potential applications in nanoscience.
SURFACES AND INTERFACES
(2022)
Article
Automation & Control Systems
Muna E. Raypah, Loh Jing Zhi, Lim Zi Loon, Ahmad Fairuz Omar
Summary: This study introduces a method that combines near-infrared spectroscopy (NIRS) with chemometrics to evaluate adulteration levels in stingless bee honey. By analyzing the spectral region of the honey, chemometric tools can effectively discriminate and quantify adulterated honey.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2022)
Article
Chemistry, Physical
Hamad Yahia Abu Mhanna, Ahmad Fairuz Omar, Yasmin Md Radzi, Hanan Fawaz Akhdar, Haytham Al Ewaidat
Summary: This study compares the optical responses of EBT3 films exposed to X-rays and solar ultraviolet rays (SUV-rays), and investigates their effectiveness in various radiation types, energies, and absorbed doses. The results show that the response of EBT3 films to absorbed doses is influenced by the expiry dates and radiation sources. Additionally, despite having expiry dates, the films can still be used for clinical and research purposes.
Article
Chemistry, Multidisciplinary
Maisarah Musa, Hamad Yahia Abu Mhanna, Ahmad Fairuz Omar, Yasmin Md Radzi, Hanan Fawaz Akhdar, Nor Hafizah Ishak, Haytham Al Ewaidat
Summary: The study investigates the optical response of an expired EBT3 film to X-rays and electron beam doses. The results show that the expired film can be used to measure radiation from different sources with high accuracy, and the individual calibration of radiation dose yields precise measurements.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Mahmood S. Jameel, Azlan Abdul Aziz, Mohammed Ali Dheyab, Pegah Moradi Khaniabadi, Alyaa Abdulhussein Kareem, Mohammad Alrosan, Abdullah Taha Ali, Muwafaq Ayesh Rabeea, Baharak Mehrdel
Summary: This study focuses on the synthesis of uniformly cubic-shaped silver nanoparticles using ultrasonic assist. Phenolic compounds from edible mushrooms were used for mycosynthesis of cubic AgNPs with antibacterial properties. The results showed that the synthesized AgNPs had a uniform cubic shape and small size distribution, and exhibited enhanced antibacterial activity.
SURFACES AND INTERFACES
(2022)
Article
Automation & Control Systems
Muna E. Raypah, Jelena Muncan, Suhainah Sudik, Ahmad Fairuz Omar, Mohd Hafiz Mail, Roumiana Tsenkova, Azman Seeni
Summary: The study evaluated the feasibility of using absorbance spectra in the NIR region coupled with aquaphotomics analysis to classify different cancerous cell lines. Results demonstrated high accuracy of classification, with clear discrimination between the three cell lines and subgroups detected based on the presence of PhR in the culture medium.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2022)
Review
Biochemistry & Molecular Biology
Mohammed Ali Dheyab, Azlan Abdul Aziz, Pegah Moradi Khaniabadi, Mahmood S. Jameel, Nazila Oladzadabbasabadi, Selwan Abduljabbar Mohammed, Raja Saleh Abdullah, Baharak Mehrdel
Summary: Gold nanoparticles (AuNPs) are increasingly popular as drug carriers due to their unique properties. This review focuses on the research accomplishments and opportunities in this field, describing the developments in the use of monodisperse AuNPs for diagnostic and therapeutic applications. The possible development of functionalized monodisperse AuNPs for theranostic applications is also considered.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Acoustics
Farhank Saber Braim, Nik Noor Ashikin Nik Ab Razak, Azlan Abdul Aziz, Layla Qasim Ismael, Bashiru Kayode Sodipo
Summary: In this study, the effect of ultrasonic irradiation on the properties of chitosan-coated superparamagnetic iron oxide nanoparticles (CS-SPIONs) was investigated. The results showed that increasing the sonication period and decreasing the acoustic power led to a decrease in crystallinity and elemental proportions, as well as an increase in the Zeta potential. The synthesized CS-SPIONs were found to be non-toxic and biocompatible with cells.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Physical
Muheeb Ahmad Alkhalayfeh, Azlan Abdul Aziz, Mohd Zamir Pakhuruddin, Khadijah Mohammedsaleh M. Katubi
Summary: This study investigates the effects of embedding plasmonic Au@Ag nanoparticles (NPs) in the buffer and active layers of polymer solar cells. The results show that optimizing the volume ratio of the embedded NPs can significantly improve the energy conversion efficiency of the devices.
Article
Infectious Diseases
Diaa Alrahmany, Ahmed F. Omar, Aisha Alreesi, Gehan Harb, Islam M. Ghazi
Summary: This study investigated factors contributing to mortality rates in nosocomial Acinetobacter baumannii infections, finding age, admission to critical care units, and infectious diagnosis to be significantly associated with higher mortality. Interventions such as improving multidisciplinary infection control, regular disinfection, and optimal intubation practices can reduce infection-related mortality rates.
Article
Materials Science, Ceramics
Farhank Saber Braim, Nik Noor Ashikin Nik Ab Razak, Azlan Abdul Aziz, Mohammed Ali Dheyab, Layla Qasim Ismael
Summary: This study examined the use of Sumac plant extract as a green stabilizer for superparamagnetic magnetite nanoparticles (SPMNPs). The extract solution was used as a green stabilizer to fabricate aqueous colloidal suspension of SPMNPs. The properties of the synthesized nanoparticles were characterized and compared to uncoated SPMNPs. The results showed that the Sumac extract significantly improved the stability and magnetic properties of the coated SPMNPs, making them suitable for various biomedical applications.
CERAMICS INTERNATIONAL
(2023)
Article
Automation & Control Systems
Muna E. Raypah, Jelena Muncan, Suhainah Sudik, Ahmad Fairuz Omar, Mohd Hafiz Mail, Roumiana Tsenkova, Azman Seeni
Summary: This study evaluated the ability of absorbance spectra in the near-infrared region to predict the number of cells for different cell lines. MLR and PLSR models were developed with high prediction accuracy. The presence of phenol red in the culture medium improved the prediction accuracy for certain cell lines, but not for others. The effect of phenol red was attributed to its impact on the water molecular structure of the cells' culture medium.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2022)
Article
Biochemistry & Molecular Biology
Mohammed Ali Dheyab, Azlan Abdul Aziz, Nazila Oladzadabbasabadi, Alyaa Alsaedi, Farhank Saber Braim, Mahmood S. Jameel, Asmeit Ramizy, Mohammad Alrosan, Ali Madi Almajwal
Summary: This study investigates the influence of synthetic methods on the aggregation stability and antibacterial activity of gold nanoparticles against Staphylococcus aureus. The sonochemical method produces monodispersed spherical gold nanoparticles with excellent stability and strong antibacterial activity, which is significant for the development of new antibacterial agents and water purification processes.
Article
Acoustics
Farhank Saber Braim, Nik Noor Ashikin Nik Ab Razak, Azlan Abdul Aziz, Mohammed Ali Dheyab, Layla Qasim Ismael
Summary: This study utilized ultrasound to rapidly modify iron oxide nanoparticles (Fe3O4 NPs) by incorporating bismuth nanoparticles (Bi NPs) on their surface, resulting in Fe3O4@Bi composite NPs. The optimized preparation parameters were determined using response surface methodology, and the stability and biocompatibility of Fe3O4@Bi NPs were improved. The sonochemical approach efficiently produced an extremely stable, homogeneous, and biocompatible Fe3O4@Bi NPs with multifunctional potential.
ULTRASONICS SONOCHEMISTRY
(2023)