We employed Density Functional Theory (DFT) to investigate the electronic, magnetic, and optical characteristics of armchair graphene nanoribbons (AGNRs) decorated with neptunium (Np) and plutonium (Pu). Our analysis delves deeply into the intricate orbital hybridizations associated with C-Np, C-Pu, C-C, Np-Np, and Pu-Pu chemical bonds. Through this approach, we explore the electronic band structure, band-decomposed charge densities, spin-charge distributions, and Van Hove singularities in the density of states. Furthermore, our examination successfully correlates optical excitation with electronic band energy. Our results indicated that these rare-earth atoms are strongly bound to the edge structure of AGNRs, significantly altering their electronic, magnetic, and optical properties. Theoretical exploration not only reveals the intriguing physical and chemical properties of rare-earth (Np/Pu) decorated AGNRs but also presents a practical pathway for synthesizing novel materials.
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http://dx.doi.org/10.1039/d3na01050c | DOI Listing |
Phys Rev Lett
December 2024
Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, No. 22 Hankou Road, Nanjing, Jiangsu 210093, People's Republic of China.
Water electrolysis suffers from electron transfer barriers during oxygen evolution reactions, which are spin-related for magnetic materials. Here, the electron transfer at the Fe_{64}Ni_{36}-FeNiO_{x}H_{y} interface is effectively accelerated when the electrode is heated to trigger the Invar effect in Fe_{64}Ni_{36} Invar alloy, providing more unoccupied orbitals as electron transfer channels without pairing energy. As a result of thermally stimulated changes in electronic states, Fe_{64}Ni_{36}/FeNiO_{x}H_{y} achieved a cascaded oxidation of the catalytic center and water.
View Article and Find Full Text PDFSci Adv
January 2025
Institute of Molecular Physical Science, ETH Zurich, 8093 Zurich, Switzerland.
Dynamic nuclear polarization (DNP) and emerging quantum technologies rely on the spin transfer in electron-nuclear hybrid quantum systems. Spin transfers might be suppressed by larger couplings, e.g.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Lab for Neuroinformation, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China.
Background: To study the morphological characteristics of the thalamus in cognitively normal people with apolipoprotein E epsilon 4 (APOE ε4), and to explore whether it is affected by neuropsychiatric symptoms in patients aged between 60 and 70 years, and to provide evidence for the early brain structural changes in Alzheimer's disease.
Method: Clinical assessment, neuropsychological assessment, blood text and MRI examination were performed in 101 cognitively normal elderly patients in a tertiary psychiatric memory clinic in Chengdu. The cognitive function and thalamic volume of APOE ε4 carriers (n = 30) and APOE ε4 non-carriers (n = 71) were compared using an independent sample T-test.
Nanoscale
January 2025
Wenzhou Key Laboratory of Biophysics, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China.
As advanced materials, chiral nanomaterials have recently gained vast attention due to their special geometry-based physical and chemical properties. The fast development of the related science and technology means that various devices involving polarization-based information encryption, photoelectronic and spintronic devices, 3D displays, biomedical sensors and measurement, photonic engineering, electronic engineering, solar devices, , been explored extensively. These fields are at their beginning, and much effort needs to be made, including improving the optical, electronic, and magnetic properties of advanced chiral nanomaterials, precisely designing materials, and developing more efficient construction methods.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Hallym University, Chuncheon, Gangwon-do, Korea, Republic of (South).
Background: In patients with mild cognitive impairment (MCI), the presence or absence of memory deficits is associated with divergent clinical presentations, etiologies, and prognostic outcomes. These differences may also manifest in additional neurologic signs beyond cognitive impairments and are often reflected in distinct magnetic resonance imaging (MRI) profiles. Gait is one of the clinical characteristics that reflects brain function along with cognitive function.
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