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Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

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Related Experiment Video

Updated: Sep 9, 2025

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

Published on: June 23, 2017

Laser-Patternable and Stretchable Metal Electrodes Using Metal-Amine Coordination Complexes.

Seongyu Lee¹, Ngoc Thanh Ho¹, Jin Hong Kim¹

¹Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)

|August 29, 2025

Summary

This summary is machine-generated.

Researchers developed a new stretchable electrode using metal-amine coordination complexes. This material offers excellent stretchability and durability for advanced electronic applications.

Keywords:

coordination bonding laser patterning stretchable electrode thin metal electrode

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Area of Science:

Materials Science
Nanotechnology
Polymer Chemistry

Background:

Coordination bonding enhances material properties like toughness and stretchability.
Mussels utilize this interaction for survival in marine environments.
Stretchable electronics based on coordination bonding are underdeveloped.

Purpose of the Study:

Introduce a novel stretchable electrode using metal-amine coordination complexes.
Investigate the stretchability, durability, and fabrication versatility of this new electrode.
Demonstrate the potential of this material in soft actuators.

Main Methods:

Formation of metal-amine coordination complexes between a solid metal (Au) and an organic layer.
Fabrication of thin-film electrodes (tens of nanometers thick).
Direct laser patterning for pattern formation and stretchability adjustment.

Main Results:

Achieved excellent stretchability up to 70%.
Demonstrated high durability with 10,000 cycles at 40% strain without pre-treatment.
Successfully fabricated a reversible soft actuator using the developed electrode.

Conclusions:

Metal-amine coordination-complex-based electrodes (MACE) offer a promising route to highly stretchable and durable electronics.
Direct laser patterning provides versatile fabrication capabilities.
This approach enables simultaneous softness and toughness in advanced electronic materials.