Article
Materials Science, Multidisciplinary
M. M. Makhlouf
Summary: Thin films of meso-tetraphenylporphyrin manganese chloride complex (MnClTPP) were prepared by evacuated thermal evaporation technique, and the structure formation was identified using atomic force microscopy and X-ray diffraction techniques. The annealing process improved the performance of the films, resulting in nanocrystalline structure formation and changes in absorbance spectra.
Article
Materials Science, Multidisciplinary
M. M. Makhlouf, M. M. Shehata
Summary: This paper demonstrates the optical properties of thermally evaporated TPyP thin films and shows significant changes in structural formation and optical spectroscopic features of TPyP thin films under different annealing temperatures. The results suggest that TPyP thin films could be used in energy conversion devices as a promising absorbing medium.
Article
Physics, Multidisciplinary
Ziqing Li, Changcai Cui, Xiaolong Zhou, Subiao Bian, Oriol Arteaga, Xipeng Xu
Summary: In this study, the thickness and optical properties of amorphous carbon films deposited on a-plane sapphire substrates were investigated non-destructively using Mueller matrix spectroscopic ellipsometry. The films were characterized using topography profilometry and Raman spectroscopy. Two fitting models, Bruggeman effective medium approximation model and single Cody-Lorentz oscillator model, were proposed to determine the film thickness and optical constants. The results were verified using Transmission Electron Microscope (TEM). The findings showed that non-destructive measurement of film thickness was possible in the range of 5 nm to 200 nm, with some error for thin films due to nonuniform deposition. However, after 4 hours of deposition, the relative error between TEM and Spectroscopic Ellipsometry measurements reduced to 1%, indicating the potential of spectroscopic ellipsometry in monitoring thickness growth.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Applied
Chen Chen, Dan Wu, Meng Yuan, Chao Yu, Jian Zhang, Chuannan Li, Yu Duan
Summary: CsPbX3 perovskite thin films fabricated by vacuum evaporation require precise optical constants for designing optical devices. Research shows that the three-oscillator model accurately describes the optical constants of CsPbBr3, and time-resolved photoluminescence can accurately predict the electric field intensity distribution and cavity length.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Minglin Zhao, Jing Xu, Qian Li, Kui Jin, Fuyang Cao, Youyou Hu, Yang Li, Ting Gou, Jun Dai
Summary: This article focuses on the optical properties of a new single-crystal LiTi2O4 thin film. A high-quality LiTi2O4 single-crystal thin film with (011) orientation was prepared on an MgAl2O4 (011) substrate using pulsed laser deposition. The weak in-plane optical anisotropy is attributed to the Jahn-Teller distortion in the Ti-O octahedrons. The pseudo-dielectric functions were determined in the photon energy range of 1.24-5.06 eV, and various dielectric-related factors were discussed.
Article
Chemistry, Physical
Runtian Qie, Saeed Zajforoushan Moghaddam, Esben Thormann
Summary: This study demonstrates the importance of considering the optical properties of polydopamine coatings in ellipsometry analysis. By systematically varying the film thickness and surface roughness, it is shown that different oxidation conditions can lead to polydopamine coatings with varying structural and optical properties, requiring unique optical models for accurate estimation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Weiming Liu, Junbo He, Xudan Zhu, Tiantian Huang, Xin Chen, Yuxiang Zheng, Liangyao Chen, Rongjun Zhang
Summary: The optical constants of amorphous/polycrystalline Ga2O3 films deposited by plasma-enhanced atomic layer deposition were investigated. The refractive index of the films increased after annealing, and the polycrystalline samples had larger bandgaps than the amorphous samples. The optical constants were extracted using the 2TL method, and these results are useful for the design of photodetectors and power devices.
Article
Optics
Gerald E. Jellison, Nikolas J. Podraza, Ambalanath Shan
Summary: This paper explores the determination of optical functions of anisotropic materials using generalized ellipsometry, focusing on the symmetry relations between cross-polarization coefficients (CPs) and crystal symmetry. The requirements for generalized ellipsometry and various ellipsometry measurement configurations are also discussed.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2022)
Article
Optics
Tao Cheng, Tianhao Fei, Wenjie Zhang, Jia-Yue Yang, Linhua Liu
Summary: This study investigates the temperature-dependent dielectric functions of GaN through experiments and calculations, identifying absorption peaks from excitonic and phonon-assisted indirect absorption processes. The research explores the impact of temperature and doping on the optical characteristics of GaN, aiming to advance its application in high-power electronic devices.
Article
Materials Science, Multidisciplinary
I. Guler, M. Isik, N. Gasanly
Summary: The optical properties of TlIn(S0.25Se0.75)(2) crystals were investigated using ellipsometry measurements. The crystal exhibited well-defined peaks in the X-ray diffraction pattern, indicating a monoclinic structure. Energy dependence of various linear optical parameters in the range of 1.25-4.50 eV were analyzed. The compound's band gap and Urbach energies were determined to be 1.96 and 0.68 eV, respectively, through analysis of the absorption coefficient. The refractive index spectrum was analyzed using the single-effective-oscillator model to obtain oscillator and dispersion energies, dielectric constants, and plasma frequency. Additionally, the present study revealed the nonlinear refractive index, first-order, and third-order nonlinear susceptibilities of the TlIn(S0.25Se0.75)(2) crystal.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Chenlin Wang, MinJu Ying, Jie Lian, MingYang Wei, Qingfen Jiang, Zhen Xu, Yu Zhang, Yueming Wang
Summary: In this work, ion implantation of Mn and As ions into ZnO films significantly altered their optical properties, leading to changes in refractive index and extinction coefficient. The presence of Mn ions also introduced a halfmetallic property to the ZnO films, resulting in gentler variations in optical characteristics. These findings suggest new possibilities for the design and optimization of optoelectronic devices utilizing ZnO thin films with semi-metallic properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Arun Kumar, Sonia Rani, Dhriti Sundar Ghosh
Summary: This study measured the optical constants of methylammonium lead iodide thin films on different underlying layers and analyzed the performance of devices using these films. The results showed that there was an error of approximately 10.6% when using the optical constants taken from films on different underlying layers.
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)
Article
Materials Science, Multidisciplinary
Meshal Alzaid, N. M. A. Hadia, E. R. Shaaban, M. El-Hagary, W. S. Mohamed
Summary: This paper investigates the structural, morphological, optical, and electrical conduction properties of 2D WSe2 thin films deposited by electron beam evaporation at room temperature. The study finds that the thickness of the films affects their nanostructure, optical constants, and energy bandgap. Additionally, the thin WSe2 films demonstrate wide absorption and a closely matched energy gap, making them promising candidates for photovoltaic applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Review
Materials Science, Multidisciplinary
Peter Petrik, Miklos Fried
Summary: Thin films are widely used in various applications such as displays, decoration, water proofing, smart windows, and solar panels. Scaling up existing thin-film measurement techniques requires high speed and redesign of configurations.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Abdullah Al-Sehemi, Ahmed Al-Ghamdi, Nikolay Dishovsky, Gabriela Atanasova, Nikolay Atanasov
Summary: A flexible and compact multiband wearable antenna with a simple and low-profile structure is proposed in this paper. It is capable of covering most identified frequency bands for biomedical applications and demonstrates robust on-body performance and radiation efficiency.
IETE JOURNAL OF RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Xidong Zhang, Jiaguo Yu, Wojciech Macyk, S. Wageh, Ahmed A. Al-Ghamdi, Linxi Wang
Summary: In this study, a step-scheme heterojunction photocatalyst C3N4/PDA (CNP) was constructed, which showed improved H2O2 production rate compared to most reported photocatalysts.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Review
Chemistry, Multidisciplinary
Asif Hayat, Muhammad Sohail, Usama Anwar, T. A. Taha, H. I. A. Qazi, Amina, Zeeshan Ajmal, Abdullah G. Al-Sehemi, Hamed Algarni, Ahmed A. Al-Ghamdi, Mohammed A. Amin, Arkom Palamanit, W. Nawawi, Emad F. Newair, Yasin Orooji
Summary: The increasing demand for sustainable energy production has led to the extensive use of solar power technology, particularly in the combustion of pollutants, CO2 reduction, photocatalysis, and hydrogen gas production. Semiconductor-based photocatalysis, such as g-C3N4, has emerged as a promising solution due to its superior electronic configuration and high performance. However, g-C3N4's photocatalytic activity is hindered by its small surface area and charge recombination. Various synthetic strategies have been employed to enhance photocatalytic performance by incorporating g-C3N4 with different materials. This review provides an overview of the latest g-C3N4-based materials and their applications in solar energy and environmental management.
Article
Materials Science, Multidisciplinary
Tianzhong Li, Jinyong Wang, Tongkai Chen, Swelm Wageh, Ahmed A. Al-Ghamdi, Jiangtian Yu, Zhongjian Xie, Han Zhang
Summary: In this study, a drug formulation based on lactic acid bacteria (LAB) was developed to produce reactive oxygen species (ROS) in tumors and induce host immunity. The LAB were modified with zeolitic imidazolate framework-67 (ZIF-67) and effectively delivered into tumor cells, leading to the generation of ROS upon light exposure. The bacterial hybrid induced tumor shrinkage through photodynamic therapy and stimulated inflammation to attract immune cells for cancer elimination.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Environmental
Ruchun Li, Panyong Kuang, Swelm Wageh, Ahmed A. Al-Ghamdi, Haolin Tang, Jiaguo Yu
Summary: In this study, a core@shell structure of metallic Ni@O-riched Ni layer (Ni@O-Ni) pre-electrocatalyst was established, which possesses a unique self-adaptable ability for potential-dependent reconstruction to generate actual active sites for catalytic reactions. The catalytic system showed outstanding efficiency and stability in hydrogen evolution reaction (HER) and organic compound oxidation reaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Gaowei Han, Chengyuan Liu, Yang Pan, Wojciech Macyk, Swelm Wageh, Ahmed A. Al-Ghamdi, Feiyan Xu
Summary: We developed a novel metal-organic frameworks (MOFs)-derived In2O3/ZnO tubular S-scheme heterojunction photocatalyst for solar-driven CO2 photoreduction. The efficient charge separation, stronger redox ability, and powerful CO2 activation of the In2O3/ZnO S-scheme heterojunctions contribute to the enhanced CO production rate and nearly 100% selectivity.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
F. Bajafar, W. Shirbeeny, R. Al-Wafi
Summary: We investigated the optoelectronic properties of ZnS quantum dots doped with Lanthanide series [Xe] 6s(2) 4f (n) with 6 <= n <= 9, including Gd: [Xe] 6s(2) 4f(7) 5d(1). The I-V characteristics of the RE-doped ZnS QDs were studied under near-UV exposure (395 nm) and darkness. The results showed that the Eu-doped ZnS exhibited a 56% increase in photocurrent under UV exposure compared to darkness, suggesting its potential for photosensors and optical switches applications. Doping with Lanthanides did not affect the zinc blind phase of ZnS, but it did cause a shift in the XRD pattern and an increase in grain size.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Ahmed A. A. Al-Ghamdi, Ahmed A. A. Galhoum, Ahmed Alshahrie, Yusuf A. A. Al-Turki, Amal M. M. Al-Amri, S. Wageh
Summary: To combat Cu(II) pollution, chitosan-nanohybrid derivatives were developed for effective copper adsorption. These derivatives exhibited selective adsorption for Cu(II) from multicomponent solutions and showed high durability over multiple cycles. The adsorption properties and interaction behaviors were thoroughly studied and explained using XPS and FTIR analysis.
Article
Multidisciplinary Sciences
Ahmed Alghamdi
Summary: A novel Interpolation and Exponential Function-centered Deep Learning Neural Network (IEF-DLNN) and multi-objective-based optimizing control system has been proposed for Seawater Desalination (SWD). Experimental evaluation shows that the proposed system achieves better performance compared to existing methodologies.
Article
Multidisciplinary Sciences
Richard O. Ocaya, Yusuf Orman, Abdullah G. Al-Sehemi, Aysegul Dere, Ahmed A. Al-Ghamdi, Fahrettin Yakuphanoglu
Summary: This article presents evidence for the existence of illumination and bias-dependent negative differential conductance (NDC) in Ni-doped Al/ZnO/p-Si Schottky diodes, and explores the possible mechanism for its origin. The Ni doping percentages ranged from 0% to 10%. NDC was observed between -1.5 V and -0.5 V in reverse bias under illumination, but only at certain doping levels and specific forward bias. Moreover, the devices exhibited excellent optoelectronic characteristics in the photoconductive and photovoltaic modes, with open circuit voltages ranging from 0.03 V to 0.6 V under illumination.
Article
Education, Scientific Disciplines
Reham Kaifi, Ahmed Subahi, Salem Alqarni, Ahmed Jaddawi, Ahmed Alghamdi, Khalid M. Alshamrani
Summary: This study aimed to examine the psychological, physical activity, and educational effects of COVID-19 on radiological sciences students and interns in Saudi Arabia. The results showed that COVID-19 had a negative impact on the mental health and physical activity of the participants, but they reported positive academic outcomes.
ADVANCES IN MEDICAL EDUCATION AND PRACTICE
(2023)
Article
Physics, Condensed Matter
Kwado Mensah-Darkwa, Richard O. Ocaya, Abdullah G. Al-Sehemi, Daniel Yeboah, Aysegul Dere, Ahmed A. Al-Ghamdi, Ram K. Gupta, Fahrettin Yakuphanoglu
Summary: In this study, metal-semiconductor-metal (MSM) ZnO-based Schottky barrier diodes (SBDs) were fabricated using titanium-doped tin-zinc oxide (SZT) films by sol-gel spin coating. The effects of Ti doping concentration on the structural, optical, and electrical properties were studied. The results showed that Ti doping improved the performance of the devices by increasing the barrier heights and improving rectification ratios.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Condensed Matter
Richard O. Ocaya, Abdullah G. Al-Sehemi, Adem Tataroglu, Aysegul Dere, Ibrahim Erol, Mecit Aksu, Ahmed A. Al-Ghamdi, Fahrettin Yakuphanoglu
Summary: This study investigates the fabrication and performance analysis of Al/CuO:LaB6/p-Si/Al diodes with varying concentrations of CuO-doped LaB6 interlayer films. The study reveals that by controlling CuO doping in LaB6, the effective barrier height at the LaB6:CuO heterojunction can be significantly enhanced, improving rectification properties. These findings contribute to the development of high-performance LaB6-based devices, advancing photonic technologies by emphasizing the advantages of CuO doping.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Environmental
Zeeshan Ajmal, Yassine Naciri, Munir Ahmad, Abdelghani Hsini, Asmae Bouziani, Mohmed Laabd, Waseem Raza, Adil Murtaza, Anuj Kumar, Sami Ullah, Abdullah G. Al-Sehemi, Ahmed A. Al-Ghamdi, Abdul Qadeer, Asif Hayat, Ridha Djellabi
Summary: Volatile and semi volatile organic compounds (VOCs and SVOCs) are serious environmental pollutants causing diseases worldwide. Photocatalytic technology using conductive polymers (CPs) such as polyaniline (PANI), polypyrrole (PPy), and polythiophene (PTh), along with inorganic oxide semiconductors, shows great potential in removing VOCs and SVOCs due to their multifunctional properties and high efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Physics, Applied
Bo Fu, Ce Shang, Hengyu Liu, Shuzheng Fan, Kangjun Zhao, Yule Zhang, Swelm Wageh, Ahmed Al-Ghamdi, Xiaogang Wang, Lijun Xu, Xiaosheng Xiao, Han Zhang
Summary: In this article, we review two types of mode-locked lasers with multimode fibers (MMFs), one using a short segment of MMF as a saturable absorber (SA), and the other constructing multimode cavities for spatiotemporal mode-locking (STML). The principles of MMF-based SA and STML are described based on the common theory of multimode nonlinear fiber optics. A detailed overview of recent progress and a perspective for the development of mode-locked lasers with MMFs are also provided.
APPLIED PHYSICS REVIEWS
(2023)
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)