Chi-Ching Kuo

A biobased nanofiber membrane enables PENG energy harvesting, microplastic filtration, and TENG reuse for self-powered tracking and mobile unlocking, integrating energy, remediation, and smart sensing.

A multimodal sensing system was developed based on reservoir computing for letter, word, and s-EMG gesture signal recognition.

Developing neural interfaces that seamlessly integrate with the brain while enabling stable, multimodal sensing and stimulation is central to advancing neuroscience and neuroprosthetic technologies. Conventional metal‐ or silicon‐based probes suffer from mechanical mismatches with soft tissue, causing inflammation, signal instability, and limited long‐term performance. Recent efforts toward soft probes have improved compliance, yet their fabrication typically relies on complex lithography or modular assembly, limiting geometric customization, scalability, and multifunctional integration. Here, we present NeuroMAP, a multifunctional architected probe for neural interfacing, enabled by a three‐dimensional reconfigurable fabrication strategy that integrates conducting polymer hydrogel electrodes and embedded microfluidic channels within compact soft cylindrical architectures. Multimaterial direct ink writing followed by rolling‐ or wrapping‐based reconfiguration produces NeuroMAP and its miniaturized W‐NeuroMAP variant with integrated electrical and fluidic functions. The probes exhibit high compliance, stable electrochemical performance during deformation and extended immersion, and precise leakage‐free microfluidic delivery. This additive manufacturing strategy enables scalable multichannel integration with up to 30 electrically isolated electrodes. In vivo implantation in the mouse hippocampus demonstrates localized chemical neuromodulation, spatially resolved single‐unit recording, stable chronic stimulus‐responsive electrophysiology, and attenuated glial responses compared with rigid metal probes. This work establishes a customizable, mechanically compliant platform for multifunctional neural interfaces.

The high-speed data transmission capability of photomemory is expected to overcome the von Neumann bottleneck, making it a key target for next-generation technological development. With the growing emphasis on environmental sustainability, bio-based materials have attracted increasing attention in recent years due to their rich functional groups, which offer great versatility and application potential. This study employs Ruddlesden-Popper (RP)-phase quasi-2D perovskite (Q-2D PVSK) and bio-based material as the electret layer in non-volatile photomemory, achieving high performance through a simple fabrication process. The results show that the incorporation of bio-based materials leads to devices with high carrier mobility (∼10−2 cm2/V·s), a high Ion/Ioff current ratio (3.19 × 105), and a broad memory window (∼35 V). Moreover, even after multiple cycles, the device maintains a strong photocurrent (∼10−5 A), and long-term retention measurements (∼20,000 s) reveal no significant current degradation. These results validate that the synergistic interaction between bio-based material and Q-2D PVSK significantly enhances both the memory characteristics and the operational stability of the device, demonstrating their strong potential for next-generation nonvolatile photomemory applications.

Wearable and flexible optoelectronic devices are rapidly advancing toward human‐interactive applications. However, their operational lifespan is often limited by mechanical damage, interface delamination, and environmental influences. Existing encapsulation methods provide only partial protection and lack autonomous repair capabilities under real‐world conditions. In this study, we present a bioinspired self‐healing polymer (SHP) composite modeled after butterfly wings. This material features a cooperative network of hydrogen bonds, disulfide exchange, and π–π interactions, enabling rapid self‐healing at room temperature without external stimuli. The SHP demonstrates outstanding stretchability (4950%), high toughness (30.47 MJ m ⁻³ ), and environmental resilience, with healing efficiencies of 98% in water, 89% in phosphate buffer saline, and 84% at −5°C. When integrated into emissive layers, SHP‐based light emitting diodes (LEDs) achieve high luminance (9598 cd m ^{− 2} ) and an external quantum efficiency (EQE) of 10.52%. Additionally, SHP‐encapsulated perovskite‐based integrated SHP LEDs reach a peak EQE of 8.43% and current efficiency of 20.67 cd A ⁻¹ . The flexible, crack‐resistant encapsulation effectively prevents moisture ingress and mechanical failure, maintaining 96% luminance after 400 bending cycles. This self‐sustained ISHP‐based strategy enhances device durability, reduces electronic waste, and supports the development of autonomous, repairable optoelectronic systems for wearable displays, smart textiles, and soft robotics.

The rapid advancement of wearable electronics and self‐powered systems necessitates the development of flexible, sustainable, and multifunctional materials capable of efficient energy harvesting. In this study, a bio‐based piezoelectric nanogenerator is developed using a chitosan/poly (ethylene oxide) (PEO)/MXene (CPM) composite film. Chitosan provides intrinsic piezoelectricity and antibacterial activity due to its abundant functional groups, while PEO enhances flexibility and dipole mobility through hydrogen‐bonding interactions. The incorporation of multilayered MXene significantly improves interfacial polarization, mechanical strength, and charge transport within the composite matrix. The optimized CPM device exhibits a maximum output voltage of 16.43 V and a current of 0.62 µA under low‐frequency mechanical excitation. The device also demonstrates excellent durability, maintaining ∼88% performance after 8000 cycles. The CPM film exhibits superior recyclability and dual functionality, maintaining approximately 92% of its original voltage after three successful recycling processes through reprocessing into new film, while also demonstrating excellent antibacterial properties. Additionally, the device effectively harvests biomechanical energy from human motions, enabling its application as a self‐powered sensing platform for wearable systems.

Bidentate ligand engineering provides a versatile strategy to regulate crystallization and lattice dynamics in metal halide perovskites. Herein, a bidentate malonamide ligand, butyl-malonamide-phenylene (Bi-BMP), is incorporated into red 2D/quasi-2D/3D perovskites (PVSK) to construct efficient exciton-funneling channels and enhance crystal rigidity. The malonamide groups form strong dipole–ion coordination with Pb2+, promoting uniform phase growth and balanced dimensional distribution, while the rigid phenylene backbone suppresses thermal lattice expansion and field-induced distortion. These dual functions yield reduced exciton–phonon coupling (γLO = 130 meV) and suppressed nonradiative recombination, resulting in a sixfold enhancement of solid-film PLQY (26.9%). Consequently, Bi-BMP@PVSK devices achieve an EQE of ≈14%, a tenfold longer operational lifetime, and color-pure red emission (CIE 0.623, 0.260) approaching the Rec. 2020 standard. This dual-functional molecular design establishes a general strategy for highly efficient and durable red PeLEDs.

Lead halide perovskites (LHPs), such as FAPbI₃ nanocrystals (NCs), exhibit suitable bandgap energy and superior thermal and chemical stability, making them ideal for photovoltaic and near-infrared (NIR) laser applications. However, recent studies on NIR amplified spontaneous emission (ASE) from FAPbI₃ NCs under nanosecond pulsed laser excitation still face the challenge of high lasing thresholds. In this work, FAPbI₃ NCs were synthesized via the hot-injection method and deposited on a PMMA passivation layer (S-II). Owing to the passivation effect, S-II exhibits enhanced photoluminescence (PL) intensity, a longer carrier lifetime, and higher two-photon absorption (2PA) performance compared to those directly deposited on the glass substrate (S-I). Besides, the improved thermal stability of S-II has been demonstrated based on temperature-dependent ASE measurements, showing a higher characteristic temperature (T_C ∼176 K). Under both backward- and sideward-scattering configurations, S-II exhibits a lower ASE threshold, higher optical gain, and a higher degree of polarization (DOP), which is attributable to the gain-guiding effect. The flexible ASE of an FAPbI₃ NC film was produced using PET as the substrate, exhibiting a redshift in the emission peak and an increase in intensity under mechanical-stress-induced bending. The high-performance NIR ASE produced from FAPbI₃ NCs using PMMA as a passivation layer, combined with mechanical flexibility, demonstrates high potential as a promising gain medium for NIR laser applications.