Related Experiment Video
Updated: Feb 23, 2026
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
16.1K
Tuning the electronic structure in stanene/graphene bilayers using strain and gas adsorption
Frank F Yun1, D L Cortie, X L Wang
1Spintronic and Electronic Materials Group, Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, New South Wales 2500, Australia.
Physical Chemistry Chemical Physics : PCCP
|September 14, 2017
Summary
Stanene monolayers on graphene show tunable electronic properties. Strain and water adsorption affect their behavior, offering potential for novel electronic components.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Atomically-thin electronic components are crucial for future technologies.
- Stanene, a tin allotrope, offers unique electronic properties.
- Epitaxial growth of stanene on graphene is a promising synthesis route.
Purpose of the Study:
- To investigate epitaxial configurations of stanene-graphene bilayers.
- To determine the effects of lattice strain and water adsorption on their electronic properties.
- To explore potential for tuning electronic characteristics.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Identification of low-energy epitaxial structures.
- Analysis of band structures and hybridization schemes.
Main Results:
- Two families of low-energy structures identified: co-aligned and rotated (30 degrees).
- Rotated structures exhibit metallic interfaces; co-aligned structures are semimetallic/semiconductor.
- Electronic states correlate with tin layer buckling and sp2/sp3 hybridization.
- Strain can induce a metal-insulator transition.
- Water adsorption on stanene maintains metallic properties with mixed Dirac and parabolic bands.
Conclusions:
- Stanene-graphene bilayers offer tunable electronic properties via structural configuration and strain.
- The system's electronic behavior is sensitive to hybridization and adsorption.
- Potential for designing novel electronic devices with controlled properties.
Related Concept Videos
02:29Conformations of Cycloalkanes
15.4K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
15.4K
02:18Conformations of Ethane and Propane
18.1K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
18.1K
01:27Measurements of Strain
2.6K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.6K
02:11Conformations of Cyclohexane
16.3K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
16.3K