Abstract The mechanical similarity between bioelectronic platforms and native tissue microenvironments is critical for successful cell-microdevice interfacing. Advances in high-resolution microfabrication have enabled the creation of 3D conductive microstructures; however, these approaches typically yield to structures that are electrically active but mechanically stiff relative to biological tissues. In this work, we present a strategy for the fabrication of soft 3D bioelectronic interfaces by blending PEDOT:PSS with a methacrylate-modified gelatin and leveraging two-photon polymerization lithography for micropatterning. Incorporating the conducting polymer into the hydrogel matrix resulted in reduced electrical impedance and exhibited soft mechanical properties both at the macro- and micro-scale. Here, the conductive hydrogel blends have been 3D printed, their versatility was assessed through different geometries and were used for neuronal cell culture. This approach enables the fabrication of soft neural interfaces with biomimetic architectures, using multimaterial blends, supporting improved electrical and mechanical integration at the cell-electrode interface.

Abstract Large-area electronic sensor and actuator arrays are suitable systems for thin-film transistor (TFT) technology with numerous applications from consumer electronics to healthcare. Considerable effort is being spent to make these arrays a reality. However, research on the power delivery circuits that supply these arrays has remained largely unexplored. This work delves into the design trade-offs and characterization of high output power boost converters in low-temperature polysilicon (LTPS) technology. The proposed boost converters deliver 0.62–2.17 W of output power, orders of magnitude above prior TFT solutions, with efficiencies ranging from 47 to 69.5%. These boost converters enable the realization of large-area sensor and actuator arrays and set the foundation for future research in this area.

Abstract Thermoelectric devices offer a promising route for waste-heat recovery, yet conventional modules—consisting of multiple pairs of inorganic legs soldered to rigid metal electrodes—are intrinsically brittle and nearly impossible to repair or reconfigure once fabricated. Although recent incorporation of flexible or stretchable polymeric components has improved mechanical deformability, these integrated architectures cannot be modified for new functions or restored. In this study, we propose the concept of Lego-like thermoelectric leg blocks that enable on-demand repair and reconfiguration via modular assembly. Each block operates as an independent unit comprising PDMS-based, self-healing Ag-flake-embedded composite electrodes and 3D-printed BiSbTe and BiTeSe thermoelectric legs, yielding flexible, repairable, and modular devices. Assembled devices preserve performance under bending (radius ≈ 3.4 mm), stretching (40%), and even after cutting and reassembly. Moreover, repeated disassembly/reassembly into diverse geometries proceeds without measurable loss in power output. Our Lego-like blocks provide a versatile thermoelectric platform that combines flexibility, reparability, and reconfigurability.