Versatile chemical transformations of surface functional groups in two-dimensional transition-metal carbides (MXenes) open up a previously unexplored design space for this broad class of functional materials. We introduce a general strategy to install and remove surface groups by performing substitution and elimination reactions in molten inorganic salts. Successful synthesis of MXenes with oxygen, imido, sulfur, chlorine, selenium, bromine, and tellurium surface terminations, as well as bare MXenes (no surface termination), was demonstrated. These MXenes show distinctive structural and electronic properties. For example, the surface groups control interatomic distances in the MXene lattice, and Ti C ( = 1, 2) MXenes terminated with telluride (Te) ligands show a giant (>18%) in-plane lattice expansion compared with the unstrained titanium carbide lattice. The surface groups also control superconductivity of niobium carbide MXenes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.aba8311 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Different Internal Fixation Methods for Sanders Type II and III Calcaneal Fractures: A 5-Year Retrospective Study and Finite Element Analysis.
Orthop Surg
January 2025
Orthopedics Department, Gongli Hospital of Shanghai Pudong New Area, Shanghai, China.
Objective: Soft tissue defects and postoperative wound healing complications related to calcaneus fractures may result in significant morbidity. The aim of this study was to investigate whether percutaneous minimally invasive screw internal fixation (PMISIF) can change this situation in the treatment of calcaneal fractures, and aimed to explore the mechanical effects of different internal fixation methods on Sanders type III calcaneal fractures through finite element analysis.
Methods: This retrospective analysis focused on 83 patients with Sanders II and III calcaneal fractures from March 2017 to March 2022.
Effect of In Situ Acid Erosion on Structural and Optical Properties of Nanoparticulated Bisacrylic Resin With Different Surface Treatments.
J Esthet Restor Dent
January 2025
Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil.
Objective: To evaluate the influence of in situ acid erosion on the structural and optical properties of nanoparticulate bisacrylic resin with different surface treatments, evaluating surface roughness (Ra), knoop microhardness (KHN), color change (ΔE, ΔL, ΔC, ΔH), contrast (CR) and translucency (TP).
Methods: Eighty specimens were made (n = 10 per group) and the following surface treatments were applied: U-unpolished; A-polishing with Astropol rubber tips (Ivoclar); S-Biscover LV surface sealant (Bisco) and S-Palaseal surface sealant (kulzer). For the in situ experiment, 10 volunteers wore an intraoral appliance containing eight specimens (two specimens per experimental group), with only one specimen from each experimental group being subjected to the acid process.
Muscle Loss During First-Line Chemotherapy Impairs Survival in Advanced Pancreatic Cancer Despite Adapted Physical Activity.
J Cachexia Sarcopenia Muscle
January 2025
Department of Medical Oncology, Lille University Hospital, Lille, France.
Background: Advanced pancreatic ductal adenocarcinoma (aPDAC) is often accompanied by significant muscle mass loss, contributing to poor prognosis. SarcAPACaP, an ancillary study of the GERCOR-APACaP phase III trial, evaluated the role of adapted physical activity (APA) in aPDAC Western patients receiving first-line chemotherapy. The study aimed to assess (1) the potential impact of computed tomography (CT)-quantified muscle mass before and during treatments on health-related quality of life (HRQoL) and overall survival (OS) and (2) the role of APA in mitigating muscle mass loss.
View Article and Find Full Text PDFInfluence of the Type of Bulk-Fill, Resin-Based Composite on Internal Adaptation in Class V Restorations.
J Coll Physicians Surg Pak
January 2025
Department of Stomatology, The Second People's Hospital of Hefei and Hefei Hospital Affiliated to Anhui Medical University, Hefei, Anhui, China.
Objective: To investigate the effects of bulk-fill, resin-based composite types (high or low viscosity) on the internal adaptation of Class V restorations.
Study Design: Experimental study. Place and Duration of the Study: Hefei Stomatological Hospital, Hefei, China, from October 2022 to December 2023.
Comparing different timings of tourniquet application in total knee arthroplasty: effects on postoperative pain and bone cement interface.
J Orthop Surg Res
January 2025
Department of Orthopaedics, FuyangHospital of Anhui Medical University, Fuyang, Anhui, China.
Objective: This study aims to elucidate the impact of varying tourniquet application timings on postoperative pain and the bone cement interface following TKA.
Method: Patients who underwent TKA in our department between March 2021 and July 2023 were included in this study. They were randomly assigned to three groups: Group 1 used tourniquets throughout the operation, Group 2 applied tourniquets before the osteotomy, and Group 3 applied tourniquets after completing the osteotomy.
Want 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!