Devices

Self-curling, suture-free hydrogel cuff for a 0.5 mm vagus nerve carrying a carbon nanotube and P(VDF-TrFE) ferroelectric strip that turns near-infrared light into nerve-like electrical pulses. Du Xuemin's group at SIAT; anti-inflammatory vagus modulation in rats (Advanced Materials, 2026).

Catalog specification sheet - Peripheral nerve

SIAT ferroelectric bioelectronic interface (FBI) for vagus nerve

Primary source →

Record ID: BTSD-ACAD-0104
Reviewed: 2026-10-09
Interface: pni
Evidence stage: preclinical

Independent, source-linked catalog sheet. Not a manufacturer-issued datasheet, regulatory decision or instructions for clinical use. Human evidence does not establish approval. Source-specific restrictions, conflicts and missing specifications are retained below.

SIAT ferroelectric bioelectronic interface (FBI)

A wireless-triggered nerve cuff for the vagus nerve from Du Xuemin’s group (Intelligent Medical Materials and Devices Research Center, SIAT, CAS, Shenzhen). Paper: “Multifunctional ferroelectric bioelectronic interfaces for long-term biosafe vagus nerve modulation”, Advanced Materials, 2026. The source is SIAT’s Chinese release of 15 April 2026; the paper text and DOI were not reached, so thicknesses, light dose and stimulation parameters are blank.

Identity

Field	Value and source scope
Device	Multifunctional ferroelectric bioelectronic interface, FBI [1]
Origin	SIAT State Key Laboratory of Biomedical Imaging Science and System, Du Xuemin; co-author at Peking University School of Basic Medical Sciences [1]
Target	Rat vagus nerve, anti-inflammatory modulation [1]
Regulatory status	Research device; animal data only [1]

Geometry and architecture

Field	Value and source scope
Layers	Three functional layers: bilayer hydrogel base, ferroelectric composite strip on top, giving self-curling, suture-free fixation and biomimetic electrical output [1]
Curl	The bilayer curls into a tube on contact with water and wraps a nerve about 0.5 mm in diameter [1]
Channels, cuff length, strip dimensions

Materials and fabrication

Field	Value and source scope
Base	Chitosan and sodium alginate bilayer hydrogel [1]
Adhesion	Surface groups form hydrogen and covalent bonds with nerve tissue, about 50 kPa adhesion strength [1]
Active strip	Carbon nanotube / poly(vinylidene fluoride-trifluoroethylene) composite, CNT/P(VDF-TrFE) [1]
Process steps

Performance envelope

Field	Value and source scope
Stimulation mechanism	Near-infrared light rotates the dipoles in the ferroelectric strip, producing electrical signals similar to action-potential polarization changes; remote NIR control stimulates nerve cells [1]
In vivo	Long-term, safe, stable anti-inflammatory effect on the rat vagus nerve [1]
Quantified outcomes

Limits

The release gives no cytokine, duration or animal-number figures, so none are stated here. Only rodent work is described.

References

SIAT (Chinese), Advanced Materials | 多功能铁电生物电子实现长期安全有效迷走神经调控抗炎, 15 April 2026.