Unprecedented New Crystalline Forms of SnSe in Narrow to Medium Diameter Carbon Nanotubes.
Charlotte A SladeAna M SanchezJeremy SloanPublished in: Nano letters (2019)
We report the observation of four unprecedented new crystalline forms of SnSe, obtained as a result of encapsulation in narrow to medium diameter single-walled carbon nanotubes. Aberration-corrected scanning transmission electron microscopy at 80 kV revealed linear, zigzag, helical (i.e., 2 × 1) atomic chains and a new form of encapsulated SnSe. This new form is apparently isostructural to free-standing MoS, MoSe, and WSe extreme nanowires etched from the corresponding monolayer dichalcogenides and also recently observed encapsulated MoTe. A structural model has been attained from annular dark-field (ADF) images. The experimental imaging agrees well with image simulations produced from models anticipated for the new structural forms.
Keyphrases
- electron microscopy
- room temperature
- carbon nanotubes
- walled carbon nanotubes
- deep learning
- high resolution
- optic nerve
- reduced graphene oxide
- molecular dynamics
- quantum dots
- convolutional neural network
- ionic liquid
- optical coherence tomography
- single cell
- magnetic resonance
- computed tomography
- magnetic resonance imaging
- image quality