Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Molecular Shapes01:18

Molecular Shapes

53.5K
Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...
53.5K
Organic Compounds03:02

Organic Compounds

45.9K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
45.9K
Molecular Shape and Polarity03:37

Molecular Shape and Polarity

53.0K
Dipole Moment of a Molecule
53.0K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.1K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
3.1K
Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

2.1K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.1K
Pericyclic Reactions: Introduction01:17

Pericyclic Reactions: Introduction

9.2K
Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic...
9.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nanoscale amorphization of poly(triarylamine) for efficient and stable inverted perovskite photovoltaics.

Nature nanotechnology·2026
Same author

Optical cooling by interfacial charge transfer in 2D heterostructures.

Nature·2026
Same author

Steering from C<sub>1</sub> to C<sub>2</sub> Products from the Photocatalytic CO<sub>2</sub> Conversion over Correlated Single-Atom Pairs.

Journal of the American Chemical Society·2026
Same author

Transferable Two-Dimensional Hydrophobic Metal-Organic Framework Encapsulation of MoS<sub>2</sub>-Based Humidity-Resistant NO<sub>2</sub> Sensors.

ACS sensors·2026
Same author

Two-dimensional melt growth of large-scale, single-crystalline hybrid organic-inorganic perovskite films.

Nature communications·2026
Same author

Chiral superfluorescence from perovskite superlattices at room temperature.

Nature·2026

Related Experiment Video

Updated: May 5, 2026

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

16.6K

Molecularly thin, two-dimensional all-organic perovskites.

Hwa Seob Choi1, Jun Lin1, Gang Wang2

  • 1Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.

Science (New York, N.Y.)
|April 4, 2024
PubMed
Summary

Researchers developed a new metal-free, two-dimensional (2D) layered perovskite, the Choi-Loh van der Waals phase. This material shows promise as a gate dielectric for thin-film transistors.

More Related Videos

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

9.6K
Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
04:14

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

Published on: October 1, 2019

12.9K

Related Experiment Videos

Last Updated: May 5, 2026

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

16.6K
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

9.6K
Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
04:14

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

Published on: October 1, 2019

12.9K

Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Nanotechnology

Background:

  • All-organic perovskites, particularly three-dimensional (3D) structures, have shown significant potential.
  • The development of two-dimensional (2D) all-organic perovskites is hindered by a lack of established design principles.

Purpose of the Study:

  • To synthesize a novel metal-free 2D layered perovskite.
  • To explore the potential applications of this new material, specifically as a gate dielectric.

Main Methods:

  • Synthesis of a metal-free 2D layered perovskite with the chemical formula A2B2X4, termed the Choi-Loh van der Waals phase (CL-v phase).
  • Characterization of the CL-v phase, highlighting its van der Waals gap facilitated by interlayer hydrogen bonding.
  • Demonstration of exfoliation and growth of the CL-v phase as molecularly thin 2D organic crystals.

Main Results:

  • Successful synthesis of the CL-v phase, a metal-free 2D layered perovskite.
  • The CL-v phase possesses a van der Waals gap due to interlayer hydrogen bonding.
  • Dielectric constants for the CL-v phase were measured to be between 4.8 and 5.5.
  • The material was successfully grown as molecularly thin 2D organic crystals.

Conclusions:

  • The CL-v phase represents a new class of metal-free 2D layered perovskites.
  • This material can be processed into thin films suitable for electronic applications.
  • The CL-v phase demonstrates significant potential for use as gate dielectrics in thin-film transistors.