Flexible thermoelectric materials have drawn significant attention from researchers due to their potential applications in wearable electronics and the Internet of Things. Despite many reports on these materials, it remains a significant challenge to develop cost-effective methods for large-scale, patterned fabrication of materials that exhibit both excellent thermoelectric performance and remarkable flexibility. In this study, we have developed an Ag₂Se-based ink with excellent printability that can be used to fabricate flexible thermoelectric films by screen printing and low-temperature sintering. The printed films exhibit a Seebeck coefficient of −161 μV/K and a power factor of 3250.9 μW/m·K² at 400 K. Moreover, the films demonstrate remarkable flexibility, showing minimal changes in resistance after being bent 5000 times at a radius of 5 mm. Overall, this research offers a new opportunity for the large-scale patterned production of flexible thermoelectric films.

Graphitic carbon nitride (g‐C ₃ N ₄ ) is a metal‐free semiconductor responsive to visible light that has attracted considerable interest as a photocatalyst in environmental and biomedical applications. Constructing photocatalysts as light‐driven microrobots allows simultaneous propulsion and catalytic activity, both driven by photoinduced charge separation. In addition, light‐driven systems can perform remote control of micro/nanorobots (MNRs) and reduce their reliance on external chemical fuels. Thus, g‐C ₃ N ₄ has been investigated as a functional material for microrobots, owing to its low cost, chemical stability, and biocompatibility. This review presents an overview of g‐C ₃ N ₄ ‐based microrobots, including their fabrication strategies for different morphologies, such as tubular, sheet‐like, and spherical structures. It also discusses their propulsion mechanisms, including self‐diffusiophoresis, self‐electrophoresis, and bubble propulsion. Their applications in water purification, including the degradation of organic pollutants and the removal of heavy metals, are discussed, followed by biomedical uses such as antibacterial therapy and drug delivery. Finally, current challenges and prospects for the development of efficient and sustainable g‐C ₃ N ₄ ‐based microrobots are outlined.