16-channel array of PEDOT:PSS hydrogel fibres wet-spun and annealed under mechanical constraint to 0.94 to 20 micrometer diameter, the size of a neuron. Single-unit tracking for 6 months in mouse motor cortex, no clear gliosis at 16 weeks. Zhang Ting's group at Suzhou Institute of Nano-Tech and Nano-Bionics (Matter, 2026).
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.
Penetrating electrodes made entirely of conductive hydrogel fibres thinned to the size of a single neuron. From Zhang Ting’s group at the Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO, CAS). Paper: “A neuron-scale all-hydrogel electrode array for chronic brain activity recording”, Matter, 2026; first author Wang Mingxu. The source is SINANO’s Chinese release of 29 April 2026. The paper was not found in Europe PMC and its text was not read, so DOI, fibre count per channel, insulation and numeric impedance and SNR are blank.
Identity
Field
Value and source scope
Device
All-hydrogel neural electrode array from PEDOT:PSS fibres [1]
Origin
SINANO CAS, Zhang Ting; co-corresponding author Li Lianhui [1]
Species
Mouse [1]
Regulatory status
Research device [1]
Geometry and architecture
Field
Value and source scope
Channels
16, implanted in mouse motor cortex by minimally invasive surgery [1]
Fibre diameter
0.94 to 20 um, stated as the current limit of one-dimensional hydrogel processing [1]
Design basis
Size, modulus, water content and 3D topology matched to neurons; the group compared foreign-body response to rigid electrodes [1]
Materials and fabrication
Field
Value and source scope
Material
PEDOT:PSS hydrogel fibre [1]
Process
Thermal-solvent-assisted mechanically constrained annealing after optimized wet spinning, with stretching and annealing tuned together; gives linear phase separation, higher molecular orientation and crystal size, and shorter pi-pi stacking distance [1]
Mechanics
Ultra-soft with very low bending stiffness; dry and wet mechanics differ and are tunable [1]
Performance envelope
Field
Value and source scope
Recording
High-SNR single-unit spikes in rest, anesthesia, wakefulness and vigorous movement [1]
Duration
6 months of continuous single-neuron tracking with stable waveforms [1]
Tissue response
No clear gliosis or immune inflammation at 16 weeks; ultrasound imaging showed stable electrode position [1]
Electrochemistry
Release states very high charge storage and injection capacity; numbers blank
Limits
Mouse only, 16 channels. Single-source summary from the institute’s own release.