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Ion Spectroscopy in the Context of the Diffuse Interstellar Bands: A Case Study with the Phenylacetylene Cation.
ACS Earth Space Chem
December 2024
School of Chemistry, The University of Edinburgh, Joseph Black Building, David Brewster Road, King's Buildings, Edinburgh EH9 3FJ, Scotland, U.K.
Identification of the molecular carriers of diffuse interstellar bands (DIBs) requires gas phase electronic spectra of suitable candidate structures. Recording the spectra of these in the laboratory is challenging because they include large, carbon-rich molecules, many of which are likely to be ionic. The electronic spectra of ions are often obtained using action spectroscopy methods, which can induce small perturbations to the absorption characteristics and hinder comparison with astronomical observations.
View Article and Find Full Text PDFDisinfection of dental root canals by cold atmospheric plasma: a systematic review and meta-analysis of dental biofilm.
Front Oral Health
December 2024
Department of Innovative Technologies in Medicine & Dentistry, University of Chieti-Pescara, Chieti, Italy.
Aim: The intricate structure of the tooth root canals has a role in the colonization and biofilm formation in hidden areas that are hardly reached by standard endodontic treatments. This review aims at summarizing data from and studies for a better understanding of the application of cold atmospheric plasma (CAP) for the disinfection of dental root canals.
Methods: PubMed, Scopus, and Web of Science databases were screened.
Structure and Electrocatalytic Properties of Sulfur-Containing Multi-Walled Carbon Nanotubes on a Titanium Substrate Modified by a Helium Ion Beam.
Nanomaterials (Basel)
December 2024
Electrochemistry Department, St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia.
In this work, a set of analytical techniques, including scanning electron microscopy (SEM), Raman scattering spectroscopy, X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray microanalysis (EDX) and cyclic voltammetry (CV), were used to study the impact of high-energy He ion irradiation on the structural and electrochemical characteristics of sulfur-containing multi-walled carbon nanotubes (S-MWCNTs) placed on a titanium substrate. The results indicate that the ion beam treatment of the S-MWCNT system led to an increase in the level of imperfections on the surface structures of the nanotubes due to the formation of point defects on their outer walls and the appearance of oxygen-containing functional groups, including SO groups, near these defects. At the same time, a significant increase in the sulfur concentration (by 6.
View Article and Find Full Text PDFPlasma-Assisted Preparation of Reduced Graphene Oxide and Its Applications in Energy Storage.
Nanomaterials (Basel)
November 2024
College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China.
Reduced graphene oxide (rGO) exhibits mechanical, optoelectronic, and conductive properties comparable to pristine graphene, which has led to its widespread use as a method for producing graphene-like materials in bulk. This paper reviews the characteristics of graphene oxide and the evolution of traditional reduction methods, including chemical and thermal techniques. A comparative analysis reveals that these traditional methods encounter challenges, such as toxicity and high energy consumption, while plasma reduction offers advantages like enhanced controllability, the elimination of additional reducing agents, and reduced costs.
View Article and Find Full Text PDFThe Role of Helium Plasma-Assisted Liposuction in Lipoabdominoplasty After Weight loss.
Aesthetic Plast Surg
December 2024
Plastic Surgery Unit, San Carlo di Nancy Hospital, Rome, Italy.
Article Synopsis
- Weight loss patients often have significant abdominal skin laxity due to rapid weight loss and bariatric surgery, prompting the development of new body contouring techniques.
- This study evaluated the effectiveness of helium plasma radiofrequency (HPRF) technology for tightening skin after lipoabdominoplasty in 100 patients, focusing on safety, satisfaction, and outcomes.
- Findings showed high patient satisfaction (88% rated 5/5 on the Likert scale) and minimal complications, demonstrating that HPRF-assisted lipoabdominoplasty can enhance body contouring with lower risk of scarring and complications.
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