X-ray absorption spectroscopic measurements have been used to compare the electronic structures of swift heavy ions (100 MeV Si ions) irradiated and pristine Ni-Al nanocrystalline films. Results from X-ray diffraction (XRD), X-ray absorption near-edge structure (XANES) spectra at Al K-, and Ni L(2,3)-edges and extended X-ray absorption fine structure (EXAFS) at Ni K-edges are discussed. The observed XRD peaks indicate the improvement of crystalline nature and Al(111) clustering after the swift heavy ion interactions. While the XANES spectra at Ni L(2,3)-edges show decrease in the intensity of white line strength, the Al K-edge shows increase in intensity after irradiation. Above results imply that swift heavy ions induce low Z (i.e., Al) ion mass transport, changes in Al sp-Ni-d hybridization, and charge transfer. EXAFS results show that crystalline nature is improved after swift heavy irradiation which is consistent with XRD results.
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http://dx.doi.org/10.1016/j.saa.2007.11.031 | DOI Listing |
Protein Expr Purif
January 2025
Institute of Tropical Medicine, Joint Vietnam-Russia Tropical Science and Technology Research Center, Viet Nam.
Botulinum neurotoxin, produced by the bacterium Clostridium botulinum, causes botulism, a severe, rapidly progressing, and potentially fatal condition. Swift detection of the toxin and timely administration of antitoxin antibodies are critical for effective treatment. The current standard for Botulinum toxin testing is the mouse lethality assay, but this method is time-consuming and requires live animals.
View Article and Find Full Text PDFAnal Chim Acta
January 2025
School of Agricultural Engineering, Jiangsu University, 212013, Zhenjiang, PR China; School of Chemistry and Chemical Engineering, Jiangsu University, 212013, Zhenjiang, PR China; Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, PR China. Electronic address:
Background: Heavy metal pollution is a global environmental problem. Self-reduction strategy has garnered attention in adsorption and electrochemical detection of heavy metal ions due to their operational simplicity and elimination of the need for external electrodeposition steps. Therefore, it is crucial to integrate self-reduction-based adsorption with electrochemical detection.
View Article and Find Full Text PDFACS Sens
November 2024
Department of Electronics and Communication Engineering, Netaji Subhas University of Technology, New Delhi, Dwarka 110078, India.
Nanostructured transition metal dichalcogenides (TMDs) like MoS hold promise for gas sensing applications due to their exceptional properties. However, limitations exist in maximizing sensor performance, such as limited active sites for gas interaction and sluggish response/recovery times. This study explores swift heavy ion (SHI) irradiation as a strategy to address these challenges in MoS-based NO gas sensors.
View Article and Find Full Text PDFJ Environ Manage
November 2024
Institute of Water Resources and Hydropower, Hohai University, Nanjing, 210098, China.
The omnipresent microplastics (MPs) have gradually become a significant environmental problem due to its adverse consequences for ecological systems. MPs serve as substrates for biofilms colonization, which enhances adsorption of harmful contaminants on MPs surface in the aquatic ecosystem. The present study provides a critical discussion on the mechanism involved in MPs-biofilm formation, microbial colonization and the robust factors influencing the process in the aquatic ecosystem.
View Article and Find Full Text PDFSci Total Environ
December 2024
CSIR - National Institute of Oceanography, Regional Centre, Kochi, India.
River discharge into the sea and its implications on the environmental setting and fauna in the nearshore represent the intricate interactions among the atmosphere, hydrosphere, lithosphere, and biosphere. This study, based on in-situ and satellite data, presents how spatially varying river discharge laden with suspended sediments structure the hydrography and the nearshore benthic environment over a 590 km southwest (Kerala) coast of India. The 41 rivers that discharge along the Kerala coast are monsoon-driven; they are small but swift and cumulatively supply huge amounts of freshwater and suspended sediments into the Southeastern Arabian Sea (SEAS) during the Southwest Monsoon (SWM) when around 70 % (1925 mm) of the yearly rainfall occurs.
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