Nano Letters· 2026Q1
Scalable, Simple, and Versatile Encapsulation of 2D Materials and Devices
- 0citations
- Q1SCImago
- 2026year
Short summary
Electron-beam evaporated aluminum oxide (AlOx) effectively encapsulates air-sensitive 2D materials and acts as a fabrication mask, preserving their properties without complex stacking or post-etching.
AI-generated from the title and abstract; the full text is not read.
Key points
- Electron-beam evaporated AlOx serves as an effective encapsulation layer and sacrificial fabrication mask for 2D materials.
- This method protects sensitive materials from air, photoresists, and chemicals without requiring stacking or post-encapsulation etching.
- AlOx encapsulation preserves optical and electronic properties in rare-earth tritellurides, WTe2, and FeTexSe1–x.
- The technique is substrate-dependent and optimized for various flake thicknesses, preserving WTe2's plasmonic response and enhancing FeTexSe1–x superconductivity.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Air-sensitive 2D materials present fundamental challenges for device integration. Encapsulation is required to preserve intrinsic properties, yet conventional strategies require complicated fabrication workflows and fail with thicker flakes. We demonstrate that electron-beam (e-beam) evaporated aluminum oxide (AlOx) serves as an effective encapsulation layer and sacrificial fabrication mask, protecting sensitive flakes from air, photoresists, and chemicals. Unlike transfer-based approaches, this scalable technique requires no stacking and enables contacts without postencapsulation etching or harsh chemistry. Using rare-earth tritellurides (RTe3, R = La, Er), semimetallic WTe2, and superconducting FeTexSe1–x, we show that AlOx suppresses oxidation and preserves optical and electronic properties. We establish substrate-dependent optimization of encapsulation across a range of flake thicknesses, demonstrate that ultrathin AlOx preserves WTe2’s plasmonic response, and enhances superconducting performance in FeTexSe1–x devices when employed as a mask. Thus, we overcome the longstanding trade-off between encapsulation and straightforward device fabrication in fragile quantum materials.
The authors' abstract, as published at the source. Nano Letters, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Electronic, Optical and Magnetic Materials
Electronic, Optical and Magnetic MaterialsMaterials Science