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Updated: Feb 4, 2026

Author Spotlight: A Rapid, Microwave-Assisted Hydrothermal Synthesis Of Nickel Hydroxide Nanosheets

Author Spotlight: A Rapid, Microwave-Assisted Hydrothermal Synthesis Of Nickel Hydroxide Nanosheets

Published on: August 18, 2023

Communication: Nickel hydroxide as an exceptional deviation from the quantum size effect.

Michael Nagli¹, Maytal Caspary Toroker¹

¹Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.

The Journal of Chemical Physics

|October 15, 2018

Summary

Monolayers of nickel hydroxide defy the quantum size effect, exhibiting smaller bandgaps than bulk materials. This unexpected behavior is attributed to unique surface states influencing electronic properties.

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Area of Science:

Solid State Physics
Materials Science
Quantum Mechanics

Background:

The quantum size effect dictates that reducing material size increases bandgap due to quantum confinement.
This principle is fundamental in understanding semiconductor and solid-state properties.

Purpose of the Study:

To investigate the electronic properties of nickel hydroxide monolayers.
To identify exceptions to the established quantum size effect in nanoscale materials.

Main Methods:

Utilized state-of-the-art first-principles calculations.
Analyzed the electronic band structure of nickel hydroxide at the monolayer and bulk levels.

Main Results:

Nickel hydroxide monolayers exhibit smaller bandgaps compared to their bulk counterparts.
Observed surface states within the bandgap region of monolayers are responsible for this deviation.

Conclusions:

Nickel hydroxide monolayers present a novel exception to the quantum size effect.
Surface states play a critical role in determining the electronic properties of low-dimensional materials.