Article
Geosciences, Multidisciplinary
Xianqiang Meng, Gen K. K. Li, Xiaoyong Long, Shilei Li, Junfeng Ji
Summary: A new method for measuring soil goethite/hematite ratios is presented, which utilizes the band position of electron pair transition (EPT) in diffuse reflectance spectra processed by continuum removal. The method is validated and shown to effectively eliminate the matrix effect. Application of the method to loess-paleosol sequences confirms its potential for improving the measurement of goethite/hematite ratios in sediments.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Optics
Guilherme M. Martins, Kisla P. F. Siqueira, Cristiano Fantini, Roberto L. Moreira, Anderson Dias
Summary: This study evaluated the optical properties of Ln(2)Ge(2)O(7) ceramics using diffuse reflectance spectroscopy, investigating charge transfer bands, energy gaps, and f-f transitions. The results show that diffuse reflectance spectroscopy is a powerful tool for analyzing intraconfigurational features in lanthanide-containing materials.
JOURNAL OF LUMINESCENCE
(2021)
Article
Multidisciplinary Sciences
Dmitriy Khrustalev, Arman Tirzhanov, Anastassiya Khrustaleva, Marlen Mustafin, Azamat Yedrissov
Summary: The effective disposal of printed circuit board waste is a major environmental challenge due to the increasing amount of electronic waste worldwide. This study presents a new composite material for PCBs that can be easily recycled into their original components, offering a more environmentally friendly and efficient recycling solution.
SCIENTIFIC REPORTS
(2022)
Article
Optics
David Abookasis
Summary: The Kubelka-Munk (KM) model is used to describe the optical properties of inhomogeneous media. In this study, the KM model is transformed into a system of state equations, simplifying the light propagation process in turbid media. Experimental results demonstrate the validity and accuracy of this alternative approach compared to the traditional KM model.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
T. E. N. G. F. E. Sun, D. A. Q. I. N. G. Piao
Summary: This part introduces a time-dependent diffuse photon remission model for CIAD geometry, formulated through area integration of radially resolved time-dependent diffuse photon remission. The model is assessed against Monte Carlo simulations and limited to Heyney-Greenstein scattering phase function for relevant physical scales and medium properties of SfR. The assessments are carried out for various absorption and reduced scattering coefficients, and show differences in the response of photons with shorter and longer propagation times.
Article
Chemistry, Multidisciplinary
Giles Blaney, Ryan Donaldson, Samee Mushtak, Han Nguyen, Lydia Vignale, Cristianne Fernandez, Thao Pham, Angelo Sassaroli, Sergio Fantini
Summary: The study describes the design and validation of an instrument for dual-slope broadband diffuse reflectance spectroscopy, demonstrating its capability to accurately identify spectral features and measure absolute absorption. The instrumental methods presented can be used in quantitative spectroscopy of optically diffusive media, especially in near-infrared spectroscopy of biological tissue.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Bingbing Wang, Yulu Chen, Wulin Tong, Yangzhou Zhou, Jiajia Tao, Zewen Wang, Zuoru Dong, Hong Zhou, Zhanglong Fu, DiXiang Shao, Xiaodong Wang, Juncheng Cao
Summary: This study presents a novel blocked-impurity-band hybrid structure for terahertz radiation detection. The modulation effect of sub-wavelength metal grating on light absorption is analyzed, and the optical absorption and spectral response of the hybrid structure detectors are simulated. The results show selective absorption amplification and filtering effects, as well as significant absorption enhancement at specific wavelengths.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Rong Yan, Shuai Wang, Qiang Jiao, Liheng Bian
Summary: The computational spectrometer can reconstruct spectra based on precalibrated information. It has become an integrated and low-cost paradigm with great potential in portable or handheld spectral analysis devices in the past decade. Different from existing methods, the reported method learns a spectral dictionary via L4-norm maximization, considers statistical ranking of features, and utilizes inverse distance weighting for picking samples and constructing a local training set to achieve high accuracy.
Article
Multidisciplinary Sciences
Fengmiao Li, Yuting Zou, Myung-Geun Han, Kateryna Foyevtsova, Hyungki Shin, Sangjae Lee, Chong Liu, Kidae Shin, Stephen D. Albright, Ronny Sutarto, Feizhou He, Bruce A. Davidson, Frederick J. Walker, Charles H. Ahn, Yimei Zhu, Zhi Gang Cheng, Ilya Elfimov, George A. Sawatzky, Ke Zou
Summary: This study reports the successful growth of single-crystalline TiO(001) film using molecular beam epitaxy, enabling a first-time study of stoichiometric TiO thin films. The research shows that TiO is metal but in proximity to Mott insulating state, with a transition to the superconducting phase observed below 0.5 K close to that of Ti metal.
Article
Computer Science, Information Systems
Kevin Xie, Ryan S. Gallagher, Erin C. Conrad, Chadric O. Garrick, Steven N. Baldassano, John M. Bernabei, Peter D. Galer, Nina J. Ghosn, Adam S. Greenblatt, Tara Jennings, Alana Kornspun, Catherine Kulick-Soper, Jal M. Panchal, Akash R. Pattnaik, Brittany H. Scheid, Danmeng Wei, Micah Weitzman, Ramya Muthukrishnan, Joongwon Kim, Brian Litt, Colin A. Ellis, Dan Roth
Summary: The study aimed to automatically extract clinical information from unstructured text in clinical notes for epilepsy patients, with the potential to improve clinical decision-making and allow for large-scale retrospective research. Pretrained neural models achieved near-human performance in classifying patients as seizure-free and extracting seizure frequency and date of last seizure after finetuning. This novel machine reading approach opens new possibilities for clinical practice and research.
JOURNAL OF THE AMERICAN MEDICAL INFORMATICS ASSOCIATION
(2022)
Article
Chemistry, Multidisciplinary
Florian Brette, Dani Kourati, Michael Paris, Lola Loupias, Stephane Celerier, Thierry Cabioc'h, Michael Deschamps, Florent Boucher, Vincent Mauchamp
Summary: The functionalization of MXenes, a class of 2D materials, can significantly modify their physicochemical properties. Through experiments and theoretical calculations, we found that the carbon NMR signal in MXenes is highly sensitive to functionalization, even though carbon atoms are not directly bonded to the surface groups. We developed a theoretical model to quantitatively relate the 13C NMR shift to different surface compositions and the number of surface chemistry variants induced by different etching agents.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Computer Science, Interdisciplinary Applications
Gerald E. Loeb
Summary: Data mining is powerful for reducing costs and errors in complex engineered systems, but its application in healthcare, particularly for clinician-patient interactions, is still limited. Current AI methods are not well-suited for the iterative and subjective nature of these interactions. A new Bayesian-based approach can provide cost-effective diagnostic paths for clinicians by tracking their decision-making processes.
JOURNAL OF BIOMEDICAL INFORMATICS
(2021)
Article
Optics
Omnia A. Abd El-Ghaffar, Magdy M. Khalil
Summary: This study introduces a new and simple method to evaluate the effects of chronic and acute doses of ionizing radiation on animal blood model using laser bio-speckle measurements. It shows that ionizing radiation causes changes in blood structure components in a dose-delivery dependent manner. The bio-speckle patterns also demonstrate potential for future applications in understanding the effects of radiation on blood components and potentially other organs and tissues.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Environmental Sciences
Guimei Dong, Xiaotong Li, Renjie Yang, Yanrong Yang, Haixue Liu, Nan Wu
Summary: Soil moisture has a significant impact on the fluorescence intensity of PAHs, and a correction method using NIR diffuse reflectance spectroscopy can reduce this influence and improve the accuracy of PAHs detection. The combination of fluorescence and NIR diffuse reflectance spectroscopy shows promise for the detection of PAHs in soil.
ENVIRONMENTAL POLLUTION
(2021)
Article
Spectroscopy
Hongbin Zhuang, Wei Shi, Guijie Zhao, Yunfan Yang, Yongqing Li
Summary: This study provides a detailed investigation on the excited-state intramolecular proton transfer (ESIPT) processes of a new fluorescent probe named BTT and the mechanism of detecting Zn2+ ions. The photochemical behavior and photophysical changes were explained at the molecular level for the first time, and the calculated spectral values were in agreement with experiments. The study not only confirms the excited state hydrogen-bond strengthening, but also provides insights into the structure of the BTT-Zn2+ complex and the excitation type of intraligand charge transfer. Additionally, the photophysical phenomenon of BTT for detecting Zn2+ ions is explained through the calculation of electronic spectra and energy gap.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Thermodynamics
V. Yu. Dolmatov, D. V. Rudenko, A. O. Dorokhov, A. A. Malygin, A. S. Kozlov, V. A. Marchukov
Summary: Detonation nanodiamonds can be obtained from tetryl by blasting it in a water shell, with a yield of 6-7 wt.% of the initial mass and a content of nanodiamonds of 57 +/- 6 wt.% in the resulting mixture. Individual explosives offer advantages in cost efficiency and safety of the charge preparation process compared to known multicomponent mixtures.
COMBUSTION EXPLOSION AND SHOCK WAVES
(2021)
Article
Chemistry, Applied
E. A. Novozhilova, A. A. Malygin, A. A. Rychkov, A. E. Kuznetsov
Summary: Modification of fluoropolymer films with vanadium- and phosphorus-containing functional groups can enhance hydrophilicity and alter the energy characteristics of the surface. The presence of phosphorus contributes to the increase in polar constituent of the surface energy, enhanced by the synergistic effect of vanadium.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2021)
Article
Chemistry, Physical
E. A. Sosnov, A. Yu Shevkina, A. A. Malkov, A. A. Malygin
Summary: Powder X-ray diffraction (XRD), atomic force microscopy (AFM), and electronic spectroscopy of diffuse reflectance (ESDR) were used to study phase transformations in titanium dioxides synthesized via the hydrolysis of titanium tetrachloride. The research revealed the coordination state of atoms on the surface of materials by separating the ESDR spectra into different components. The study also proposed mechanisms for the phase transitions in one- and two-phase titanium oxide systems.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
E. A. Sosnov, A. A. Malygin
Summary: The adsorption of water by highly porous silica gels under dynamic conditions was studied using AFM and ESDR. It was found that a liquid sorbate meniscus forms in the pores, preventing the access of water molecules to the intrapore space. The coordination of water molecules on the surface of IVS-1 silica gel was also investigated, showing an increased coordination number of vanadium atoms. The resistance of the vanadium oxide monolayer to hydrolytic degradation was revealed, and a method for regenerating the gel was proposed.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
E. O. Drozdov, D. V. Buzina, A. A. Malkov, A. A. Malygin
Summary: This study proposes a binding scheme based on experimental data and predicts the formation patterns of V-O-V bonds between closely spaced vanadium hydroxide groups synthesized by sequential treatment of the silica surface with VOCl3 and H2O vapors.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Chemistry, Applied
E. A. Novozhilova, A. A. Malygin
Summary: Hybrid electret materials with increased surface charge thermal stability were synthesized by treating polytetrafluoroethylene films with vanadium oxochloride vapor and water. A model of an electret filter using a modified polytetrafluoroethylene film for air treatment was proposed and tested. Comparative tests between polytetrafluoroethylene films with and without vanadium oxide structures on the surface as filter material were conducted, showing that the presence of vanadium oxide structures significantly increased the efficiency and dust capacity of the electret air filter by over 90%.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2022)
Article
Chemistry, Applied
E. A. Sosnov, A. A. Malygin
Summary: By observing the two-stage change in color and the disappearance of hysteresis on the atomic force spectroscopy curves, it is concluded that displacement adsorption of ammonia occurs on the surface of vanadium-containing silica gel IVS-1.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2022)
Review
Chemistry, Applied
E. A. Sosnov, A. A. Malkov, A. A. Malygin
Summary: The review analyzes the areas and results of using nanotechnology based on molecular layering in various industries over the past 20 years, discussing the prospects for further development and commercialization of the process. It describes the achievements of researchers and engineers from Russia and other countries in developing the molecular layering method and commercializing solid-phase materials with improved operation characteristics, outlining the most promising directions for practical use in the coming decade.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2021)
Review
Chemistry, Applied
E. A. Sosnov, A. A. Malkov, A. A. Malygin
Summary: The paper outlines the development history of the molecular layering method, analyzes the application fields and results of nanotechnology based on this method in various industries over the past 20 years, and evaluates the prospects for further development and commercialization of this method. It briefly describes the main results of basic and experimental research in the field of solid-state chemistry, including the development and origins of molecular deposition methods, with a focus on the research achievements of researchers from other countries since the late 1970s.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2021)
