Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

Ferromagnetism

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

You might also read

Related Articles

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

Sort by

Same author

Direct Heteronucleation-Enabled Formation of Epitaxial Plasmonic CsPbBr<sub>3</sub>-Cu<sub>2-x</sub>Se Nanocrystal Heterostructures.

Nano letters·2026

Same author

Excited-State Dynamics in Lead Halide Perovskite Nanocrystals: Effects of Size, Shape, Doping, and Surface Modifications.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same author

Epitaxial Ag-CsPbBr<sub>3</sub> Perovskite Nanocrystal Heterostructures: Multi-Facets Orientations, Suppressed Plasmon and Efficient Charge Transfer.

Angewandte Chemie (International ed. in English)·2026

Same author

Ternary AgBiS<sub>2</sub> Nanocrystals: Surface and Facet Modulations.

Nano letters·2026

Same author

Beyond Surface Facets and Morphology: Precision Silica Shelling for Enhanced Luminescence and Stability in Halide Perovskite Nanocrystals.

Journal of the American Chemical Society·2025

Same author

Facet-Engineered Rubidium Lead Halide Nanocrystals for Pyro-Phototronic Broadband Photodetection.

Advanced materials (Deerfield Beach, Fla.)·2025

Search research articles

Related Experiment Video

Updated: May 10, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Chemically Spiraling CsPbBr₃ Perovskite Nanorods.

Suman Bera¹, Sanjib Shyamal¹, Narayan Pradhan¹

¹School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India.

Journal of the American Chemical Society

|September 1, 2021

Summary

Researchers developed novel spiral perovskite nanorods, overcoming challenges in anisotropic nanostructure synthesis. These unique structures show promise as efficient photocatalysts for carbon dioxide reduction.

More Related Videos

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Published on: January 22, 2019

Related Experiment Videos

Last Updated: May 10, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Published on: January 22, 2019

Area of Science:

Materials Science
Nanotechnology
Photocatalysis

Background:

Lead halide perovskite nanocrystals are key in quantum dot research.
Anisotropic nanostructures with controlled directions remain a challenge.
Existing orthorhombic CsPbBr3 nanostructures are linear along axial directions.

Purpose of the Study:

To synthesize spiral CsPbBr3 perovskite nanorods with unusual anisotropy.
To control nanorod spirality through reaction manipulation.
To explore the photocatalytic activity of these novel nanostructures.

Main Methods:

Synthesis of spiral CsPbBr3 nanorods using a Cs2CdBr4 prelattice and Pb(II) diffusion.
Manipulation of alkylammonium ion composition to control facet dissolution and spirality.
Investigation of photocatalytic CO2 reduction and methane evolution.

Main Results:

Successfully synthesized spiral CsPbBr3 perovskite nanorods with (101) planes perpendicular to the [201] axis.
Demonstrated control over nanorod spirality by adjusting alkylammonium ion composition.
Observed that methane evolution during CO2 reduction is dependent on nanorod spiral depth.

Conclusions:

Facet manipulation enables the design of complex perovskite nanorod shapes.
Perovskite nanostructure shape can be precisely controlled through reaction engineering.
Spiral perovskite nanorods show potential for efficient photocatalytic applications.