Growth and magnetotransport properties of semi-metallic WTe2 nanoribbons DOI Creative Commons
Natalia Amirulloieva, Jeļena Sušinska, Aija Trimdale-Deksne

et al.

APL Materials, Journal Year: 2025, Volume and Issue: 13(4)

Published: April 1, 2025

Exploring exotic quantum states requires high-quality materials. Tungsten ditelluride (WTe2), a type-II Weyl semimetal, is an important platform for studying these states. Recent discoveries, including the spin Hall effect, higher-order topological insulator (TI) states, and induced superconductivity, have been made on exfoliated flakes. However, this method of sample fabrication limited by its lack scalability. For studies TI 1D ribbon-shaped WTe2 materials with reduced dimensionality are great importance. Here, we present simple approach growing nanoribbons from WO3 thin films. Magnetotransport studies, effect measurements, presence large magnetoresistance at low temperatures confirm good quality semi-metallic nature fabricated nanoribbons, which crucial fundamental one-dimensional topologically protected

Language: Английский

Boosting 2D Black Phosphorus Ambient Stability: Noncovalent Functionalization Using Viologen Molecules DOI Creative Commons
Ishan Sarkar, Cong Guo, Cheng Peng

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Black phosphorus nanosheets (BPNSs) have recently emerged as a valuable addition to the diverse family of 2D materials, holding promises for wide range applications. However, their practical use is limited by poor stability under ambient conditions, they degrade quickly when exposed light, air, or moisture. Noncovalent functionalization offers promising approach address these challenges. Herein, viologen derivatives are incorporated into BPNS suspension in acetonitrile, resulting formation two hybrid materials. These hybrids subsequently stored conditions track degradation over time. The behavior functionalized BPNSs analyzed and compared that pristine both nitrogen environments, using X-ray photoelectron spectroscopy. Interestingly, viologen-based systems exhibited varying degrees protection efficiency, attributed differences average adsorption energies aggregation kinetics with BPNSs. Methyl viologen-functionalized showed markedly reduced less pronounced samples protected environment. This study introduces strategy enhancing BPNSs, making them more resistant decomposition potentially suitable energy storage applications optoelectronic devices.

Language: Английский

Citations

0
Contrast analysis for rapid characterization of 2D WTe2 structures DOI Creative Commons
Agnese Spustaka,

Andrejs Terehovs,

Aris Jansons

et al.

APL Materials, Journal Year: 2025, Volume and Issue: 13(4)

Published: April 1, 2025

Two-dimensional (2D) layered materials, particularly transition metal dichalcogenides, exhibit unique electronic and optical properties. Among these, tungsten ditelluride (WTe2) has garnered attention for its semi-metallic behavior topologically nontrivial band structure, making it a promising candidate advanced nanoelectronic applications. A significant challenge, however, lies in achieving scalable characterization, determining thickness coverage of WTe2 structures. Existing methods are often limited by time constraints lack suitability high-throughput workflows. This study introduces refined workflow combining imaging, segmentation, contrast analysis to address these limitations. Calculated values normalized were correlated with thicknesses determined atomic force microscopy found scale linearly. The proposed provides scalable, adaptable solution 2D material characterization.

Language: Английский

Citations

0
Effect of Substrate on Sulfur Vacancy Defect-Mediated Photoluminescence in Two-Dimensional MoS2 DOI Creative Commons
Yiru Zhu, Zhepeng Zhang, Ye Wang

et al.

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: 129(17), P. 8294 - 8302

Published: April 18, 2025

Chalcogen vacancy defects in monolayer transition metal dichalcogenides form in-gap states that can trap excitons, leading to defect-mediated photoluminescence (PL) emission. Here, we show room-temperature (RT, 300 K) PL from sulfur vacancies defective MoS2 is sensitive doping dielectric substrates such as SiO2 and HfO2. The observed for on untreated HfO2 but quenched SiO2, which attributed electron of SiO2. Electron confirmed by Raman synchrotron X-ray photoelectron spectroscopy. Annealing the substrate modifies its surface states, reflected recovery role substrate-induced vacancy-mediated further supported gate-dependent measurements. Our results suggest excess electrons fill defect energy MoS2, reducing probability photoexcited carrier occupation subsequent

Language: Английский

Citations

0
Growth and magnetotransport properties of semi-metallic WTe2 nanoribbons DOI Creative Commons
Natalia Amirulloieva, Jeļena Sušinska, Aija Trimdale-Deksne

et al.

APL Materials, Journal Year: 2025, Volume and Issue: 13(4)

Published: April 1, 2025

Exploring exotic quantum states requires high-quality materials. Tungsten ditelluride (WTe2), a type-II Weyl semimetal, is an important platform for studying these states. Recent discoveries, including the spin Hall effect, higher-order topological insulator (TI) states, and induced superconductivity, have been made on exfoliated flakes. However, this method of sample fabrication limited by its lack scalability. For studies TI 1D ribbon-shaped WTe2 materials with reduced dimensionality are great importance. Here, we present simple approach growing nanoribbons from WO3 thin films. Magnetotransport studies, effect measurements, presence large magnetoresistance at low temperatures confirm good quality semi-metallic nature fabricated nanoribbons, which crucial fundamental one-dimensional topologically protected

Language: Английский

Citations

0