# HFIPS scientists synthesize foldable electromagnetic shielding films with 100 dB attenuation

- Published: 2026-11-07 06:27 UTC
- Section: Machines & Making › Materials science
- Tags: electromagnetic shielding, flexible films, cross dimensional percolation, metastructures, electromagnetic interference, HFIPS CAS, conductive ink
- URL: https://realtech.media/news/rt-00c4d1c568b4a71232fd63e1_hfips_scientists_synthesize/

**A new fabrication technique yields square-meter-scale flexible films that attenuate electromagnetic interference by over 100 dB across broad frequency bands.**

![HFIPS scientists synthesize foldable electromagnetic shielding films with 100 dB attenuation](https://realtech.media/media/2026/11/789f205cb6fcb7e8.jpg)
*english.cas.cn*

A research group from the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences has introduced a method to manufacture flexible films that attenuate electromagnetic radiation across a broad frequency range, according to english.cas.cn [1]. The production method enables the fabrication of these shielding materials on a square-meter scale, addressing the physical constraints of conventional bulk shields [1].

## Cross-dimensional percolation and metastructures

Conventional materials designed to absorb or reflect electromagnetic interference typically require significant thickness to perform adequately and usually target narrow frequency bands [1]. To circumvent these constraints, the researchers applied a concept called cross-dimensional percolation [1]. This architecture integrates nanomaterials of varying dimensions into a continuous three-dimensional interconnected network [1].

To expand frequency control, the team layered precisely printed conductive patterns onto the substrate, creating functional metastructures [1]. These printed geometries allow the films to regulate electromagnetic waves over wider spectral intervals without adding excessive mass or rigidity [1].

## Fabrication process and mechanical properties

The synthesis process combines pressure-assisted filtration, precision inkjet printing, and transfer methods [1]. To ensure high printing fidelity of the metastructures, the investigators synthesized a dedicated conductive ink, while adjusting the surface chemistry of the films to increase compliance [1]. 

According to the researchers, the resulting composite films withstand repeated folding cycles while retaining structural coherence [1]. Measurements confirmed an electromagnetic shielding effectiveness exceeding 100 decibels [1]. The authors reported that the material is intended to support the integration of broadband electromagnetic protection layers into flexible electronics and wearable devices [1].

## Sources

1. [english.cas.cn](https://english.cas.cn/newsroom/research-news/202611/t20261105_1213290.shtml)
2. [Tech Xplore](https://techxplore.com/news/2026-11-thin-foldable-broadband-electromagnetic-shielding.html)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-00c4d1c568b4a71232fd63e1_hfips_scientists_synthesize/