We determined the optical properties of alpha- and gamma-phase Ce in the photon energy range from 60 meV to 2.5 eV using ellipsometry and grazing incidence reflectometry. We observe significant changes of the optical conductivity, the dynamical scattering rate, and the effective mass between alpha- and gamma-cerium. The alpha-phase is characterized by a Fermi-liquid frequency-dependent scattering rate, and an effective mass of about 20m(e) on an energy scale of about 0.2 eV. In gamma-Ce the charge carriers have a large scattering rate in the far infrared and a carrier mass characteristic of 5d band electrons. In addition, we observe a prominent absorption feature in alpha-Ce, which is absent in gamma-Ce.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.86.3407 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Degradation rates and ageing effects of UV on tyre and road wear particles.
Chemosphere
January 2025
TNO Environmental Modelling, Sensing and Analysis, Princetonlaan 6-8, 3584 CB, Utrecht, the Netherlands. Electronic address:
Tyre and road wear particles (TRWPs) are estimated to be the largest source of microplastics in the environment and due to the intrinsic use of tyres in our society this will continue to grow. Understanding their degradation mechanisms and subsequent accumulation over time is important to gain insights into the fate and impact of these particles in the environment. Accelerated UV-ageing was performed on cryomilled tyre tread particles and TRWPs from a road simulator to investigate the abiotic degradation of rubber.
View Article and Find Full Text PDFEnhancing non-viral gene delivery to human T cells through tuning nanoparticles physicochemical features, modulation cellular physiology, and refining transfection strategies.
Biomed Pharmacother
January 2025
Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran. Electronic address:
Genetically engineered immune cells hold great promise for treating immune-related diseases, but their development is hindered by technical challenges, primarily related to nucleic acid delivery. Polyethylenimine (PEI) is a cost-effective transfection agent, yet it requires significant optimization for effective T cell transfection. In this study, we comprehensively fine-tuned the characteristics of PEI/DNA nanoparticles, culture conditions, cellular physiology, and transfection protocols to enhance gene delivery into T cells.
View Article and Find Full Text PDFImpact of aerosol-photolysis interaction on the ozone concentration in the upper boundary layer on Mountain Everest.
Sci Total Environ
January 2025
SKL-ESPC & SEPKL-AERM, College of Environmental Sciences and Engineering and Center for Environment and Science, Peking University, Beijing 100871, China.
Previous research has revealed that, during the late afternoon, the ozone (O3) concentration tends to elevate at the northern perimeter of Mount Everest (5200 m above sea level). This increase is attributed to the natural gradient of rising O3 concentration with height, exacerbated by the corresponding downstream mountain winds. Our recent field observations corroborate this finding, showing a consistent increase in O3 concentrations by approximately 13.
View Article and Find Full Text PDFPreparation of bovine serum albumin nanospheres desolvation: a study of synthesis, characterization, and aging.
Nanoscale
January 2025
School of Sustainable Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, OK 73019, USA.
Serum albumin has myriad uses in biotechnology, but its value as a nanocarrier or nanoplatform for therapeutics is becoming increasingly important, notably with albumin-bound chemotherapeutics. Another emerging field is the fabrication of biopolymeric nanoparticles using albumin as a building block to achieve highly-tunable nonimmunogenic capsules or scaffolds that may be cheaply and reliably produced. The aim of this study was to characterize and optimize the desolvation process used for fabrication of albumin nanoparticles under ambient conditions, studying both glutaraldehyde (GT) and glucose (GLU) as crosslinking agents and the effect of various synthesis conditions including pH, electrolyte concentration, and rate of desolvation on particle size and stability.
View Article and Find Full Text PDFDigestion of food proteins: the role of pepsin.
Crit Rev Food Sci Nutr
January 2025
Riddet Institute, Massey University, Palmerston North, New Zealand.
The nutritive value of a protein is determined not only by its amino acid composition, but also by its digestibility in the gastrointestinal tract. The interaction between proteins and pepsin in the gastric stage is the first step and plays an important role in protein hydrolysis. Moreover, it affects the amino acid release rates and the allergenicity of the proteins.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!