Article
Chemistry, Multidisciplinary
Irina N. Zavestovskaya, Anton L. Popov, Danil D. Kolmanovich, Gleb V. Tikhonowski, Andrei I. Pastukhov, Maxim S. Savinov, Pavel V. Shakhov, Julia S. Babkova, Anton A. A. Popov, Ivan V. Zelepukin, Maria S. Grigoryeva, Alexander E. Shemyakov, Sergey M. Klimentov, Vladimir A. Ryabov, Paras N. Prasad, Sergey M. Deyev, Andrei V. V. Kabashin
Summary: Proton therapy is a promising radiotherapy modality for deep-seated and unresectable tumors, and its efficiency can be enhanced by using boron-containing substances. In this study, elemental boron nanoparticles (B NPs) were explored as sensitizers for proton therapy enhancement. These B NPs were efficiently absorbed by cancer cells and showed no remarkable toxicity effects. Proton beam irradiation of B NPs also led to the generation of reactive oxygen species, suggesting a possible non-nuclear mechanism of cancer cell death. Overall, this study offers a new approach with potential clinical applications for proton beam-based cancer treatment.
Article
Chemistry, Physical
Yuqing Meng, Hongkui Zheng, Jack Duffy, Hua Huang, Kai He, Jianhua Tong, Kyle S. Brinkman
Summary: This study showed that the activity of a triple conducting BaCo0.4Fe0.4Zr0.1Y0.1O3-s (BCFZY0.1) air cathode was enhanced by the in situ formation of BCFZY0.1 nanoparticles (NPs). The NPs were directly formed during electrolysis measurements from the reaction of BCFZY0.1 with H2O and CO2 in the air, and they were evenly distributed in a porous BCFZY0.1 framework. Under electrolysis conditions at 600 degrees C, the current density increased and stabilized at 1.12 A/cm2 after 400 hours of operation with the hierarchical BCFZY0.1 cathode. Distribution of Relaxation Time (DRT) measurements showed a decrease in polarization resistance over time as NPs formed. SEM and TEM results confirmed the formation of nanoparticles and identified their chemical and structural characteristics as BCFZY0.1 phase.
JOURNAL OF POWER SOURCES
(2023)
Article
Biochemistry & Molecular Biology
Maxim Azarkin, Martin Kirakosyan, Vladimir Ryabov
Summary: This paper presents an assessment of nuclear reaction yields in human tissue-equivalent material during proton therapy, using Geant 4 simulation. The study also examines the effect of radiosensitizer nanoparticles on the enhancement of nuclear reactions. The results show that proton beams induce noticeable nuclear reactions in the tissue, but the contribution of radiosensitizer nanoparticles is negligible.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Ceramics
Imran Shakir, Philips O. Agboola, Sajjad Haider
Summary: Copper substituted manganese ferrite nanoparticles were synthesized using the co-precipitation route and were composite with rGO. The nanocomposite showed great activity in degrading methylene blue dye due to the synergistic effect of ferrite material and rGO sheets, which enhanced electrical conductivity and reduced recombination of photoexcited electrons-holes pairs in the composite materials.
CERAMICS INTERNATIONAL
(2021)
Article
Environmental Sciences
Mohamed Dellali, Altaf Khallouli, Abdel Halim Harrath, Fawaz Falodah, Saleh Alwasel, Hamouda Beyrem, Thomas Gyedu-Ababio, Melissa Rohal-Lupher, Fehmi Boufahja
Summary: The study investigated the biomarker responses of freshwater bivalve mussel Unio ravoisieri after exposure to gold and titanium dioxide metallic nanoparticles. The results showed induction of oxidative stress, overproduction of H2O2, and changes in enzyme activities in the gills and digestive glands. The digestive gland was identified as the main target organ of Au/TiO2NPs contamination.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Yitao Cao, Tiankai Chen, Qiaofeng Yao, Jianping Xie
Summary: Derivatization is a fine chemical technique used in organic synthesis to achieve diversification of molecular properties and functionalities. In the field of metal nanoclusters (NCs), derivatization is highly desirable for diversifying species and functions due to the limited number of identified metal NC species. Through derivatization reactions, new metal NC species with intriguing properties and functions can be generated, contributing to the advancement of nanoscience towards atomic precision.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Analytical
Jingbin Li, Junfang Li, Wencai Yi, Meng Yin, Yanling Fu, Guangcheng Xi
Summary: This paper reports the surface-enhanced Raman spectroscopy performance of metallic niobium nitride three-dimensional hierarchical network structures. The unique nanocavity structure promotes the entry of molecules and takes advantage of electromagnetic hot spots, and the substrate exhibits outstanding environmental durability, high signal reproducibility, and detection universality.
ANALYTICAL CHEMISTRY
(2022)
Article
Optics
Yongliang Dong, Prabhakar R. Bandaru
Summary: This study proposes a methodology for enhancing the surface plasmon polariton (SPP) resonance associated with graphene through nanoscale metal-dielectric-metal (MDM) gaps. By tuning the carrier density in graphene, the resonances in the range of 0.7 μm to 1 μm can be modulated, which shows potential utility for surface analyte sensing. Finite element simulations in the frequency domain demonstrate that the related hybrid SPP modes can be clearly delineated in far field spectroscopy.
Article
Nanoscience & Nanotechnology
Yuanfeng Gao, Qingyu Xue, Jiayuan Li, Mingkai Zhang, Yuanyuan Ma, Yongquan Qu
Summary: Coupling acid-electrolyte proton exchange membrane fuel cells with cathodic hydrogenation shows potential in energy and chemical industry. The use of phytate coordination on Cu surface enhances the kinetic of proton adsorption/activation and hydrogenation activity. This work provides a promising approach to integrate electricity generation and chemical production.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Multidisciplinary
R. Rayaprolu, S. Moeller, I Spahn, D. Hoschen, Ch Linsmeier
Summary: In a pilot experiment, 16 MeV protons were used to irradiate 300 μm thick W samples to a damage dose of 0.006 dpa under low and high temperature conditions. The electronic loss in the sample was observed to be 1.5 MW·m(-2) in the pre-Bragg region. Post high-temperature irradiation, recrystallization of the W sample was observed, leading to a surface softening of 0.6 GPa.
Article
Materials Science, Biomaterials
Yuyang Wu, Hanyu Yang, Chenyang Shi, Hang Sun, Shengyan Yin, Guangbin Wang
Summary: Conjugated polymer dots (Pdots) are excellent fluorescent probes in the biomedical field. Thermal annealing treatment can optimize the stacking of conjugated polymer chains, enhancing the fluorescence intensity of Pdots. The possible mechanism of chain stacking optimization has been revealed using transmission electron microscopy and single particle fluorescence imaging.
BIOMATERIALS SCIENCE
(2022)
Article
Engineering, Biomedical
Qixian Zhang, Leo E. Gerweck, Ethan Cascio, Qingyuan Yang, Peigen Huang, Andrzej Niemierko, Alejandro Bertolet, Konrad Pawel Nesteruk, Aimee McNamara, Jan Schuemann
Summary: This study investigated the protective role of FLASH proton irradiation on the skin by varying the oxygen concentration. The results showed that FLASH irradiation mitigated skin contraction and had a long-term protective effect on the epidermis thickness and collagen deposition. Providing oxygen or reducing the skin oxygen concentration eliminated the dose-rate-dependent difference in response.
PHYSICS IN MEDICINE AND BIOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yeo Jin Lee, Kyu Won Lee, Dong Min Choi, Won Koo Park, Cheol Eui Lee
Summary: In this study, the effects of proton irradiation on Bi2Se3 nanoparticles were investigated using ESR measurements, revealing enhanced ESR signals from hydrogen-doped Bi2Se3 nanoparticles under high enough proton irradiation doses. Density functional theory calculations showed that hydrogen defects act as donors with transition levels in the conduction band, leading to small activation energy of around 5meV based on temperature-dependent ESR intensity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Yifan Bu, Zheng Hu, Hui Li, Shi Hu
Summary: The study successfully synthesized a hybrid catalyst of Pd with multi-metallic oxides, showing superior performance compared to hybrid catalysts of Pd with unary oxides. The catalyst demonstrated the best anti-poisoning capability among all the catalysts evaluated in a two-hour durability test, highlighting the potential of Joule heating as a simple, fast, and powerful tool for synthesizing high-performance hybrid catalysts.
Article
Materials Science, Coatings & Films
Jinn P. Chu, Yi-Jui Yeh, Chih-Yu Liu, Yi-Xiang Yang, Alfreda Krisna Altama, Ting-Hao Chang, Wei-Hung Chiang, Pakman Yiu, Kuo-Lun Tung
Summary: In this study, highly ordered and periodic Ag/Au core-shell triangle nanotube arrays were used as an ultrasensitive and low-cost surface-enhanced Raman scattering (SERS) substrate for the first time. The Ag-core nanotubes overlaid with the Au-shell showed the highest Raman intensity and enhancement factor for the probe molecule R6G. The detection limits for R6G and ketoprofen analytes were determined to be 10(-10) and 10(-6) M, respectively. The metal nanotube arrays were found to act as effective plasmonic hotspots through Raman intensity mapping, making them useful for SERS sensing applications.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)