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The Metal-Oxide Nanoparticle-Aqueous Solution Interface Studied by Liquid-Microjet Photoemission.
Acc Chem Res
July 2023
Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
ConspectusThe liquid-microjet technique combined with soft X-ray photoelectron spectroscopy (PES) has become an exceptionally powerful experimental tool to investigate the electronic structure of liquid water and nonaqueous solvents and solutes, including nanoparticle (NP) suspensions, since its first implementation at the BESSY II synchrotron radiation facility 20 years ago. This Account focuses on NPs dispersed in water, offering a unique opportunity to access the solid-electrolyte interface for identifying interfacial species by their characteristic photoelectron spectral fingerprints. Generally, the applicability of PES to a solid-water interface is hampered due to the small mean free path of the photoelectrons in solution.
View Article and Find Full Text PDFAnomalous behavior of liquid molecules near solid nanoparticles: Novel interpretation on thermal conductivity enhancement in nanofluids.
J Colloid Interface Sci
May 2023
Neutron Science and Technology Center, Comprehensive Research Organization for Science & Society (CROSS), 162-1, Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.
Hypothesis: Recently, it has been reported that anomalous improvement in the thermal conductivity of nanofluid composed of base liquids and dispersed solid nanoparticles, compared to the theoretically predicted value calculated from the particle fraction. Generally, the thermal conductivity values of gases and liquids are dominated by the mean free path of the molecules during translational motion. Herein, we present solid evidence showing the possible contribution of the vibrational behavior of liquid molecules around nanoparticles to increasing these thermal conductivities.
View Article and Find Full Text PDFEarly Microjet Experimentation with Liquid Water in Vacuum.
Acc Chem Res
March 2023
Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37077 Göttingen, Germany.
ConspectusIn this brief look at the history of liquid microjets, I recollect some personal reminiscences on initial challenges for introduction of this method, as well as unexpected problems and exemplary results using this new tool for liquid evaporation and photoelectron spectroscopy studies.Many efficient and direct, atomic level diagnostic instruments in use at solid state surfaces and in gas-phase atom or cluster studies require high vacuum. They have therefore not been applied to investigations of aqueous solutions because liquid water both strongly evaporates and rapidly freezes in vacuum.
View Article and Find Full Text PDFA Monte Carlo simulation study on the evaluation of radiation protection properties of spectacle lens materials.
Eur Phys J Plus
January 2023
Department of Medical Imaging Techniques, Vocational School of Health Services, Uskudar University, Istanbul, Turkey.
The eye lens has been known a radiosensitive tissue. Radiation exposure can cause opacities, cataracts and vision loss. The sensitivity of the eyes to ionizing radiation has attracted attention in the last decade.
View Article and Find Full Text PDFIonized and non-ionized radiation effects on coronary stent implantation.
Appl Radiat Isot
February 2023
Department of Cardiovascular Surgery, Süleyman Demirel University, Faculty of Medicine, Isparta, Turkey.
The purpose of this study is to examine the clinical radiation effects on patients with various stents. Several previous researches focused on the mechanical and physical features of the stents, but there have been few studies that focus on the interaction with radiological and clinical radiation. For stent material analysis, the ANSYS package program was employed.
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