South Korean Scientists Engineer Ultra-Thin Nanotube Film Capable of Blocking Both Cosmic Radiation and Electromagnetic Waves

KIST researchers develop an ultra-thin, 3D-printable film that captures neutrons and blocks electromagnetic waves for space and medical use.

By: AXL Media

Published: Apr 29, 2026, 3:45 AM EDT

Source: Information for this report was sourced from EurekAlert

A Breakthrough in Multimodal Protective Materials

The Korea Institute of Science and Technology has unveiled a first of its kind composite film designed to address the dual threats of electromagnetic interference and neutron radiation. Developed by a team led by Dr. Joo Yong-ho, this ultra-thin material utilizes a unique shell structure that integrates two distinct types of nanotubes. By combining the conductive properties of carbon nanotubes with the neutron-capturing capabilities of boron nitride, the researchers have created a single-layer solution for environments where heavy, rigid shielding was previously the only option.

The Structural Weight Crisis in Aerospace Engineering

Historically, the space and nuclear industries have struggled with the physical burden of protective shielding, as electromagnetic waves and neutrons typically require separate, bulky materials for effective mitigation. This complexity often leads to increased structural weight and design limitations for satellites and spacecraft. According to the research team, the emergence of more frequent lunar and deep-space missions, such as the recent Artemis 2 launch, has intensified the demand for lightweight technologies that can withstand the rigors of extreme environments without sacrificing performance or adding excessive mass.

Atomic Synergy Through Nanotube Integration

The mechanical success of this new shield relies on the complementary relationship between carbon nanotubes and boron nitride nanotubes. While the carbon elements absorb and reflect electromagnetic signals, the boron-rich components effectively trap neutrons. This synergy allows the film to block 99.999% of electromagnetic waves and reduce neutron exposure by approximately 72%. Despite these high performance metrics, the composite remains thinner than a strand of hair and retains the elasticity of rubber, allowing it to be stretched to more than double its original dimensions without losing its protective integrity.