Doctor ASKY
Scientists in South Korea have created an artificial muscle that combines extreme strength with remarkable flexibility. The tiny device weighs just over a gram but can support up to around five kilograms—about 4,000 times its own weight. It can stretch up to twelve times its original length when soft and switch to a rigid state to handle heavy loads without losing performance.
The secret is a special polymer network embedded with magnetic particles. The permanent chemical bonds give the muscle structural strength, while reversible physical bonds allow it to stretch and flex. The magnetic particles let engineers control the muscle externally, switching between soft and stiff modes as needed. It can contract to a strain of around 86 percent, more than double the capability of human muscle, and its work density is about thirty times higher than natural muscle.
Although still in early testing, this artificial muscle could revolutionize robotics, wearable devices, and prosthetics. Challenges remain, such as providing power, ensuring durability over repeated cycles, and scaling up to full limbs. Still, it demonstrates a new way to build soft yet incredibly strong actuators, opening the door for robots and exoskeletons that far exceed human strength while remaining flexible.
Research Paper 
DOI: 10.1002/adfm.202516218
Author: Saikat Bhattacharya
