The thermal expansion effect plays an important role in governing the thermal stability or the stable configuration of quasi-two-dimensional atomic layers, where the difference between the thermal expansion coefficient of different kinds of atomic layer in lateral heterostructure may cause strong thermal rippling of the atomic layer. We investigate the thermal expansion phenomenon in the WSe-MoS lateral heterostructure. We find that the thermal expansion coefficient can be enhanced by more than a factor of two via varying the ratio between the WSe and MoS components in the heterostructure. The underlying mechanism is disclosed to be the buckling of the WSe region that is induced by the misfit strain at the coherent interface between WSe and MoS. These findings shall be helpful in handling the thermal stability of functional devices based on the transition-metal dichalcogenide lateral heterostructures and other similar quasi-two-dimensional lateral heterostructures.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/1361-6528/ab9b48 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Structurally and electronically driven uniaxial negative thermal expansion in BaIrO.
Chem Commun (Camb)
January 2025
EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
Negative thermal expansion is known to exist in a range of structure types but is extremely rare in hexagonal perovskites. Here we demonstrate that BaIrO displays negative linear thermal expansion in the direction of its face-shared IrO trimers, and apparent zero volume thermal expansion below 100 K. We present evidence that this anomalous thermal expansion is driven by an unusual form of rigid body phonon behaviour governed by the effective trimer valence state and therefore has structural and electronic components to the underlying mechanism.
View Article and Find Full Text PDFEvolutionary adaptation under climate change: sp. demonstrates potential to adapt to warming.
Proc Natl Acad Sci U S A
January 2025
Department of Biology, Stanford University, Stanford, CA 94305.
Climate warming is expected to shift the distributions of mosquitoes and mosquito-borne diseases, promoting expansions at cool range edges and contractions at warm range edges. However, whether mosquito populations could maintain their warm edges through evolutionary adaptation remains unknown. Here, we investigate the potential for thermal adaptation in , a congener of the major disease vector species that experiences large thermal gradients in its native range, by assaying tolerance to prolonged and acute heat exposure, and its genetic basis in a diverse, field-derived population.
View Article and Find Full Text PDFAir and Thermally Stable Cyclic (Alkyl)(amino)carbene Ruthenium Complexes for Efficient Ring Expansion Metathesis Polymerization.
J Am Chem Soc
January 2025
Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
Ring expansion metathesis polymerization (REMP) has emerged as a potent strategy for obtaining cyclic polymers over the past two decades. The scope of monomers, however, remains limited due to the poor functional group tolerance and stability of the catalyst, necessitating a rational catalyst design to address this constraint. Here, we present ruthenium complexes featuring tethered cyclic (alkyl)(amino)carbene ligands for REMP, aiming to deepen our understanding of the structure-property relationship in newly designed catalysts.
View Article and Find Full Text PDFDetermination of Strain and Stress Field in Screening Test for Concrete Fire Spalling-Passive Restraint Effect.
Materials (Basel)
December 2024
Centre of Materials and Building Technologies (C-MADE), Department of Civil Engineering and Architecture, University of Beira Interior (UBI), 6201-001 Covilhã, Portugal.
The paper examines the impact of passive restraint on fire-induced spalling in concrete, utilizing a concrete mixture to minimize compositional variability. A variety of specimen geometries was prepared, including standard cubes and cylinders for the determination of mechanical properties and slabs of different dimensions for fire spalling tests conducted under controlled conditions. A top-opening Dragon furnace, which applies ISO 834-1 fire curves, was used to evaluate the influence of "cold rim" boundaries, where slab edges were insulated to create thermal restraint.
View Article and Find Full Text PDFEffect of Microsize and Nanosize TiO on Porous Mullite-Alumina Ceramic Prepared by Slip Casting.
Materials (Basel)
December 2024
Institute of Materials and Surface Engineering, Faculty of Natural Science and Technology, Riga Technical University, Paula Valdena st. 3/7, LV-1048 Riga, Latvia.
Sintered porous mullite-alumina ceramics are obtained from the concentrated suspension of powdered raw materials such as kaolin, gamma and alpha AlO, and amorphous SiO, mainly by a solid-state reaction with the presence of a liquid phase. The modification of mullite ceramic is achieved by the use of micro- and nanosize TiO powders. The phase compositions were measured using an X-ray powder diffraction (XRD) Rigaku Ultima+ (Tokyo, Japan) and microstructures of the sintered specimens were analysed using scanning electron microscopy (SEM) Hitachi TM3000-TableTop (Tokyo, Japan).
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!