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

Colors and Magnetism

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...

Prochirality

Prochirality

The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...

Chirality

Chirality

Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

You might also read

Related Articles

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

Sort by

Same author

Unconventional Zero-Field-Cooling Exchange Bias in 2D Van der Waals Magnetic Heterostructures.

Nano letters·2026

Same author

Altermagnetic Magnons in Twisted van der Waals Antiferromagnets.

Nano letters·2026

Same author

Field-free full switching of chiral antiferromagnetic order.

Nature·2026

Same author

Broadband Excitation of Antiferromagnetic Dynamics by Acoustic Phonons.

Advanced materials (Deerfield Beach, Fla.)·2026

Same author

Electrical manipulation of spin splitting torque in altermagnetic RuO<sub>2</sub>.

Nature communications·2025

Same author

Tunable Quantum Anomalous Hall Effect via Crystal Order in Spin-Splitting Antiferromagnets.

Nano letters·2025

Search research articles

Related Experiment Video

Updated: Aug 20, 2025

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

Spin Selectivity in Chiral Hybrid Cobalt Halide Films with Ultrasmooth Surface.

Qian Wang¹, Ying Lu², Rui-Lin He³

¹Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.

|November 20, 2022

Summary

Researchers developed new lead-free chiral materials for spintronics. These hybrid organic-inorganic halides exhibit efficient spin selectivity and form ultrasmooth films, overcoming key challenges in device applications.

Keywords:

CISS chiral metal halides circular dichroism spintronics sub-nanometer roughness

More Related Videos

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

Related Experiment Videos

Last Updated: Aug 20, 2025

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

Area of Science:

Materials Science
Condensed Matter Physics
Organic Chemistry

Background:

Chirality in low-dimensional hybrid organic-inorganic halides (HOIHs) offers potential for spintronics via chirality-induced spin selectivity (CISS).
Achieving smooth, low-roughness films of HOIHs is a significant challenge, hindering their integration into spintronic devices.
There is a critical need for novel lead-free chiral HOIHs that combine efficient spin selectivity with high-quality film formation.

Purpose of the Study:

To synthesize and characterize new lead-free chiral metal halide crystals for spintronic applications.
To investigate the film-forming properties and spin selectivity of these novel materials.
To improve film quality through additive incorporation for enhanced device performance.

Main Methods:

Synthesis of cobalt-based chiral metal halide crystals, (R/S-NEA)2CoCl4, using 0D [CoCl4] tetrahedrons and 1-(1-naphtyl)ethylamine (NEA).
Characterization of film-forming ability, chiroptical activity (gCD), and spin-polarized transport (CISS efficiency).
Incorporation of tris(8-oxoquinoline)aluminum to enhance film smoothness and crystallinity.

Main Results:

The synthesized (NEA)2CoCl4 crystals demonstrated good film-forming ability due to orderly NEA configuration stabilized by CH···π interactions.
(NEA)2CoCl4 films exhibited strong chiroptical activity (gCD ≈ 0.05) and high CISS efficiency (up to 90%).
Ultrasmooth films with sub-nanometer roughness (∼ 0.3 nm) and enhanced crystallinity were achieved by adding tris(8-oxoquinoline)aluminum.

Conclusions:

Novel lead-free chiral HOIHs, (NEA)2CoCl4, have been successfully synthesized with excellent spin selectivity.
The incorporation of tris(8-oxoquinoline)aluminum significantly improves film quality, enabling ultrasmooth surfaces.
These findings pave the way for practical applications of low-dimensional HOIHs in spintronics and related fields.