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Scientists synthesize high-conductivity 2D conducting polymers

Xinhua | Updated: 2025-02-06 10:05
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BEIJING -- An international team of researchers has synthesized a multilayer-stacked two-dimensional polyaniline crystal, achieving unique metallic out-of-plane charge transport and high conductivity, according to a study published on Wednesday in the journal Nature.

Conducting polymers are celebrated for their electrical conductivity. They hold great promise as low-cost, lightweight and flexible alternatives to traditional semiconductors and metals.

However, despite their potential, charge transport efficiency, particularly between polymer chains, had remained a key challenge limiting their performance and practical applications.

Researchers from the Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS) cooperated with international counterparts to achieve a novel 2DPANI crystal, using an anionic surfactant monolayer on the water surface.

The structure of the 2DPANI crystal enables strong in-plane conjugation and interlayer electronic coupling, the research article noted.

The synthesized conducting polymer demonstrated high conductivity, while an anisotropic charge transport was also revealed.

Meanwhile, vertical devices exhibited increasing conductivity at lower temperatures -- a hallmark of metallic out-of-plane transport.

Such advancement in conducting polymer research addresses the limited charge transport issue caused by insufficient structural ordering and electronic coupling, said Zhang Tao, a researcher at the NIMTE.

The study also provides insight into three-dimensional metallic conductivity -- thereby unlocking new possibilities for electrodes, electromagnetic shielding and sensors.

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