High-resolution electron energy loss spectroscopy has been used to study the electronic response of periodically rippled monolayer graphene grown on Ru(0001). A plasmonic mode, assigned to the π plasmon, has been observed at around 6 eV. The dispersion curve of this collective mode indicates plasmon confinement within the hills of the ripples. Moreover, we found that the corrugation of the graphene sheet also significantly affects the damping processes of the π plasmon.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c3cp51954f | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
SEEG seizure onset patterns in mesial temporal lobe epilepsy: A cohort study with 76 patients.
Neurophysiol Clin
January 2025
Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China. Electronic address:
Objectives: In the present study with a large cohort, we aimed to characterize intracerebral seizure onset patterns (SOP) of mesial temporal lobe epilepsy (mTLE), with or without hippocampal sclerosis (HS) as identified via magnetic resonance imaging (MRI).
Methods: We retrospectively analyzed 255 seizures of 76 consecutive patients with mTLE explored by stereoelectroencephalography (SEEG), including HS-mTLE (n = 52) and non-HS- mTLE (n = 24). Relevant results were obtained by a combination of spectral analysis and manual review.
Medication refractory focal epilepsy creates a significant challenge, with approximately 30% of patients ineligible for surgery due to the involvement of eloquent cortex in the epileptogenic network. For such patients with limited surgical options, electrical neuromodulation represents a promising alternative therapy. In this study, we investigate the potential of non-invasive temporal interference (TI) electrical stimulation to reduce epileptic biomarkers in patients with epilepsy by comparing intracerebral recordings obtained before, during, and after TI stimulation, to recordings during low and high kHz frequency (HF) sham stimulation.
View Article and Find Full Text PDFExperimental validation of model-free predictive control based on the active vector execution time for grid-connected system.
Sci Rep
December 2024
Ministry of Higher Education & Scientific Research, Industrial Technical Institute in Mataria, Cairo, 11718, Egypt.
Article Synopsis
- The paper explores the use of Model-Free Predictive Control (MFPC) in power electronic systems, focusing on an improved adaptive integral sliding mode observer (AISMO) to better estimate unknown factors in an ultra-local model (ULM).
- The proposed AISMO-MFPC aims to enhance control accuracy by estimating system parameters based on current errors, leading to independent control of the system.
- To achieve lower current ripple, the method incorporates active vector execution time (AVET), allowing for multiple vector selections during a sampling period, which results in faster system responses and reduced harmonics.
Impact of Condensed Tannin and Sulfur Dioxide Addition on Acetaldehyde Accumulation and Anthocyanin Profile of L. Cv. Cabernet Sauvignon Wines During Alcoholic Fermentation.
Molecules
November 2024
School of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Acetaldehyde is a key carbonyl by-product during red wine alcoholic fermentation; it is reactive and takes part in certain reactions involving anthocyanin. The aim of this study was to investigate the influence of SO and condensed tannin on the acetaldehyde accumulation of () during alcoholic fermentation and the ripple effect on wine anthocyanin. In this study, six sets of Cabernet Sauvignon alcoholic fermentation with two different sulfur levels (HS and LS) were carried out by adding exogenous condensed tannins before fermentation (T0) in the acetaldehyde rise period (TA) of and at the end of fermentation (TE), separately.
View Article and Find Full Text PDFCleansing our waters: how riffle fish communities in the Spring River of Kansas responded to pollution legislation, mining remediation, and improved water quality.
Environ Manage
November 2024
Pittsburg State University, Department of Biology, Heckert-Wells Hall 223, 1701 S Broadway St, Pittsburg, Kansas, 66762-7552, USA.
Metal pollution from mining is a threat to lotic fishes, although legislation that requires improved water quality and provides funding for remediation has been enacted to combat this stressor. The Spring River in southeastern Kansas historically received inputs of cadmium, copper, lead, and zinc that reduced the prevalence of several sensitive and imperiled fishes. Long-term reductions in these toxic metals have occurred since the 1990's because of management activities, but presently it is unknown how riffle fish communities responded to improved water quality.
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!