Article
Energy & Fuels
Shun Uji, Shunsuke Kimura, Kazuki Nakamura, Norihisa Kobayashi
Summary: We studied a multicolor electrochromic (EC) device that uses silver (Ag) deposition and is able to reversibly represent multiple colors. The coloration of the device is based on localized surface plasmon resonance (LSPR) of Ag nanoparticles (AgNPs). In this study, dark-field microscopy (DFM) was used for the first time to observe the changes in LSPR of AgNPs during the coloration process of the EC device. The obtained light scattering spectra provide detailed information on the LSPR induced by AgNPs in comparison with conventional absorption spectrum measurements.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Physics, Applied
Hadeel Alamoudi, Bin Xin, Somak Mitra, Mohamed N. Hedhili, Singaravelu Venkatesh, Dhaifallah Almalawi, Norah Alwadai, Zohoor Alharbi, Ahmad Subahi, Iman S. Roqan
Summary: In this study, p-n junction devices based on wide-bandgap p-type MnO quantum dots and n-type Si-doped GaN were fabricated. The fabricated solar-blind deep UV photodetector demonstrated high photocurrent response, low dark current, and superior photo-responsivity, making it suitable for low light level applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Composites
Mahesh Baboo, Satish Kumar, Bishen Kumar, Kananbala Sharma
Summary: This article investigates the polymer nanocomposites of polyisoprene blended with varying concentrations of synthesized silver nanoparticles. Experimental results show that the addition of AgNPs reduces storage modulus, activation energy, and fragility, while enhancing damping. The glass transition temperature remains unaffected. The incorporation of AgNPs increases toughness and tensile strength up to a certain concentration, but a decrease is observed at higher concentrations. Young's modulus decreases significantly with the addition of AgNPs, but increases at higher concentrations. Thermal analysis reveals an enhancement in thermal conductivity with an increase in AgNPs concentration.
POLYMER COMPOSITES
(2023)
Article
Electrochemistry
Rene Boettcher, Sebastian Mai, Natalia Borisenko, Adriana Ispas, Andreas Bund, Frank Endres
Summary: The speciation of Cr, Zn, and Sn in AlCl3/1-ethyl-3-methylimidazolium chloride solution has been investigated using CV, Raman spectroscopy, and DFT calculations. The addition of metal salts leads to a decrease in current waves in CV, indicating reaction with Al2Cl7(-). Raman spectroscopy shows a decrease in Al2Cl7(-) peaks and an increase in AlCl4(-) peaks, suggesting the formation of metal complexes [Me(AlCl4)(3)](-). DFT calculations support the proposed complexes by calculating Gibbs free energies.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Composites
Chenghu Kang, Jianlin Xu, Lei Niu, Chengsi Li, Jiliang Fan
Summary: This paper develops robust methods for the quantitative assessment of dispersion in polymer nanocomposites, based on modeling evaluation and direct analysis of scanning electron microscopy micrographs using binary image technology. The dispersion degree and its effect on the tensile modulus of nanocomposites are calculated and analyzed, respectively. The mean distance value between nanoparticles is measured and the dispersion index D is defined to compare different samples' dispersion states.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Multidisciplinary
Juan Wei, Dimitris Papanastasiou, Mariangela Kosmopoulou, Athanasios Smyrnakis, Pengyu Hong, Nafisa Tursumamat, Joshua A. A. Klein, Chaoshuang Xia, Yang Tang, Joseph Zaia, Catherine E. E. Costello, Cheng Lin
Summary: Comprehensive de novo glycan sequencing is challenging due to the diversity and complexity of glycans. This study demonstrates the effectiveness of electron excitation dissociation (EED) mass spectrometry for glycan analysis, showing high sensitivity, fragmentation efficiency, and analysis speed. A novel EED MS2-guided MS3 approach is developed, allowing accurate determination of glycan topology and linkage configurations.
Article
Energy & Fuels
Sahil Thareja, Anil Kumar
Summary: This study reports the in situ synthesis of Mn3O4 nanocubes decorated on N-doped reduced graphene oxide, forming Mn3O4/N-rGO nanohybrids. These nanohybrids exhibit a high electrochemical potential window and energy density in water-based electrolytes, as well as excellent cycling stability after 10,000 cycles. The Mn3O4/N-rGO-based symmetric supercapacitor shows a high cell voltage in an aqueous electrolyte, making it comparable to commercially available devices using organic electrolytes.
Article
Optics
Mohammedelnazier Bakhiet, Maogen Su, Shiquan Cao, Yanhong Wu, Maijuan Li, Chenzhong Dong
Summary: This study measured the EUV spectra of laser-produced cadmium plasma in the middle and late stages of expansion. By comparing experimental and simulated spectra, plasma parameters were obtained and various physical parameters were investigated. Good agreements between experimental and theoretical synthetic spectra were found, which would be helpful for further spectral identifications in plasma diagnostics and nuclear fusion.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Spectroscopy
Abdul G. Al Lafi, Jamal Al Abdullah, Yusr Amin, Yara Aljbai, Hussam Allham, Asmhan Obiad
Summary: Fourier Transform Infra-Red (FTIR) spectroscopy is an important technique for understanding the structure of adsorbents and designing improved ion exchange materials. This study investigates the adsorption mechanism of U(VI)/Th(IV) and Ra(II)/Ba(II) radionuclide couples on polystyrene nano manganese dioxide (PS-NMO) composite, focusing on the effect of working solution pH. The results show that the separation of U(VI)/Th(IV) and Ra(II)/Ba(II) couples can be effectively achieved at specific pH values, and the pH also affects the structure of the composite adsorbent. FTIR spectroscopy reveals the formation of different complexes and changes in the composite structure in response to metal ions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Spectroscopy
Ci Cheng-gang, Zang Jie-chao, Li Ming-fei
Summary: In the reduction of CO2, the use of diamine coordinated manganese tricarbonylcatalysts shows potential in being an effective and inexpensive catalyst. The UV-Vis and IR spectra play a crucial role in the modulation and understanding of the catalysts for CO2 photoreduction.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2023)
Article
Environmental Sciences
Rajeshwari Chatterjee, Sanat Kumar Mukherjee, Biswajit Paul, Somnath Chattopadhyaya
Summary: This study explores the production of biodiesel from Madhuca and Jatropha by a two-step acid-base homogeneous catalyst method, demonstrating similar physiochemical properties to diesel and good efficiency in engine performance and emission tests.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Plant Sciences
Xiangui Mei, Junru Tan, Na Xiao, Xinsheng Fang, Subo Gu, Jingyu Li, Jianhua Wang
Summary: Danshen (Salvia miltiorrhiza Bunge) is a commonly used traditional medicinal material in China for treating cardiovascular and cerebrovascular diseases, containing bioactive ingredients such as diterpenoid quinones and hydrophilic phenolic acids. A new efficient quantitative analysis method was developed for the fibrous roots of S. miltiorrhiza, revealing similarities in chemical constituents to roots and rhizomes, with some constituents even higher in content than the latter.
JOURNAL OF APPLIED RESEARCH ON MEDICINAL AND AROMATIC PLANTS
(2021)
Article
Astronomy & Astrophysics
Tyler Richey-Yowell, Evgenya L. Shkolnik, Adam C. Schneider, Sarah Peacock, Lori A. Huseby, James A. G. Jackman, Travis Barman, Ella Osby, Victoria S. Meadows
Summary: Low-mass stars, especially M stars, are promising candidates for hosting planets with detectable life due to their long lifetimes and comparable UV fluxes in the habitable zone with K stars. However, there is a slightly larger X-ray flux in the habitable zone of late M stars compared to K stars. This suggests that while there may not be a K-dwarf advantage in UV radiation, there may still be an advantage in X-ray radiation.
ASTROPHYSICAL JOURNAL
(2023)
Article
Chemistry, Physical
Falta Yadav, Arun Goyal, Narendra Singh
Summary: Iron emission lines across a wide range of the electromagnetic spectrum are observed in various astronomical objects. Accurate atomic data for neutral iron and its ions is essential for analyzing these lines. This study calculates energy levels and radiative data of Fe III using the relativistic configuration interaction method and the flexible atomic code (FAC). The calculated emission-line intensity ratios for optical transitions in the 3d(6) configuration are compared with observed spectra from different astronomical objects, and discrepancies are discussed. The study also explores the atomic structure of plasma-embedded Fe III and the dependence of emission line intensity ratios on plasma density and temperature.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Aditi Sengupta, Prolay Halder, Mir Sahidul Ali, Chandan Kumar Ghosh, Sanjib Bhattacharya
Summary: Li2O doped glass-nanocomposites and their crystalline counterparts have been developed. Micro-structural study reveals the distribution of various nanorods in the glass-nanocomposites. The conducting nature of these nanophases is confirmed using DFT and DOS spectra. Ionic conductivity is found to be influenced by frequency and temperature, with a tendency of sub-diffusive random trapping of lithium ions. The formation of crystalline counterparts leads to an increase in voids where Li+ ions are trapped, contributing to electrical transport processes.
