Slow electron velocity map imaging provides a means of performing relatively high resolution photoelectron spectroscopy while still maintaining many of the advantages of imaging techniques. Here, we describe its application to the spectroscopy and dynamics of some substituted toluene molecules and show it to be a versatile technique whose resolution can approach that of zero kinetic energy (ZEKE) photoelectron spectroscopy, and provides a good match to the bandwidth of transform limited 1 ps laser pulses. We provide a series of comparisons of the results obtained with different ionizing wavelengths and use these to help understand the advantages and limitations of the technique.
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http://dx.doi.org/10.1039/b812254g | DOI Listing |
Adv Sci (Weinh)
December 2024
New Cornerstone Science Laboratory, MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, 350108, China.
Radiodynamic therapy that employs X-rays to trigger localized reactive oxygen species (ROS) generation can tackle the tissue penetration issue of phototherapy. Although calcium tungstate (CaWO) shows great potential as a radiodynamic agent benefiting from its strong X-ray absorption and the ability to generate electron-hole (e-h) pairs, slow charge carrier transfer and fast e-h recombination greatly limit its ROS-generating performance. Herein, via a one-pot wet-chemical method, oxygen vacancy-rich amorphous/crystalline heterophase CaWO nanoparticles (Ov-a/c-CaWO NPs) with enhanced radiodynamic effect are synthesized for radiodynamic-immunotherapy of cancer.
View Article and Find Full Text PDFGels
December 2024
Biophysics and Biotechnology Department, Voronezh State University, 1 Universitetskaya Square, 394018 Voronezh, Russia.
Carboxymethyl cellulose sodium salt (CMC)-based superabsorbents are promising materials for the development of agricultural matrices aimed at water management and slow-release fertilizer production. However, an increase in the CMC content tends to reduce their water-absorbing capacity. This study aims to develop a cost-effective method for producing eco-friendly superabsorbents with enhanced water-absorbing capacity by incorporating a porogen and employing lyophilization.
View Article and Find Full Text PDFBioresour Technol
December 2024
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China. Electronic address:
ACS Nano
December 2024
Department of Chemistry, University of California, Berkeley, California 94720, United States.
Characterizing the size, structure, and composition of nanoparticles is vital in predicting and understanding their macroscopic properties. In this work, charge detection mass spectrometry (CDMS) was used to analyze nanocapsules (∼10-200 MDa) consisting of a liquid oleic acid core surrounded by a dense silica outer shell. CDMS is an emerging method for nanoparticle analysis that can rapidly measure the mass and charge of thousands of individual nanoparticles.
View Article and Find Full Text PDFJ Agric Food Chem
December 2024
Department of Environmental Science and Engineering, University of Science and Technology of China, 230026 Hefei, China.
Understanding the environmental fate of chemical herbicides is crucial to sustainable agriculture. Due to their joint-use with nitrogen fertilizers, their residues often coexist with NO in agricultural drainages. In this study, tribenuron-methyl was used as a model to evaluate the role of NO in the phototransformation of chemical herbicides, which was characterized by a two-stage process.
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