Yong Ju Yun

Conductive, flexible, and durable reduced RGO textiles with a facile preparation method are presented. BSA proteins serve as universal adhesives for improving the adsorption of GO onto any textile, irrespective of the materials and the surface conditions. Using this method, we successfully prepared various RGO textiles based on nylon-6 yarns, cotton yarns, polyester yarns, and nonwoven fabrics.

Electric components based on fibers or textiles have been investigated owing to their potential applications in wearable devices. High performance on response to gas, drape-ability and washing durability are of important for gas sensors based on fiber substrates. In this report, we demonstrate the bendable and washable electronic textile (e-textile) gas sensors composed of reduced graphene oxides (RGOs) using commercially available yarn and molecular glue through an electrostatic self-assembly.

Epidermal electronics are extensively explored as an important platform for future biomedical engineering. Epidermal devices are typically fabricated using high‐cost methods employing complex vacuum microfabrication processes, limiting their widespread potential in wearable electronics. Here, a low‐cost, solution‐based approach using electroconductive reduced graphene oxide (RGO) sheets on elastic and porous poly(dimethylsiloxane) (PDMS) thin films for multifunctional, high‐performance, graphene

Ultra-sensitive RGO gas sensors with a facile preparation method are presented. The gas sensor composed of RGO nanofibers showed excellent sensitivity to NO₂gas.

Here, we fabricated high-performance gold/graphene yarns through a facile method by the electroless deposition of gold nanoparticles onto the surface of graphene yarns. The gold/graphene yarns are fabricated using a completely solution-based process that can be scaled up for practical applications. They possess high electrical conductivity (2.86 × 10² S cm^-1) and good gravimetric specific conductivity (6.81 × 10² S cm² g^-1) as well as good r

Electrochromic devices (ECDs) have been widely investigated for application in next-generation displays and smart windows owing to their highly efficient optical transmittance modulation properties.

Stretchable gas sensors are important components of wearable electronic devices used for human safety and healthcare applications. However, the current low stretchability and poor stability of the materials limit their use. Here, we report a highly stretchable, stable, and sensitive NO₂ gas sensor composed of reduced graphene oxide (RGO) sheets and highly elastic commercial yarns. To achieve high stretchability and good stability, the RGO sensors were fabricated using a pre-strain str

Planar perovskite solar cells (PSCs) incorporating n-type SnO₂ have attracted significant interest because of their excellent photovoltaic performance. However, the film fabrication of SnO₂ is limited by self-aggregation and inhomogeneous growth of the intermediate phase, which produces poor morphology and properties. In this study, a self-controlled SnO₂ layer is fabricated directly on a fluorine-doped tin oxide (FTO) surface through simple and rapid chemical ba

We have fabricated freestanding nanogears by selectively etching single crystalline Au nanoplates and assembled them tooth to tooth using an atomic force microscope (AFM). The nanogears, with one center hole surrounded by six teeth, are smaller than 500 nm in overall size and 60–70 nm in thickness. We demonstrate that blunt AFM tips on stiff cantilevers are effective for the nondestructive manipulation of ductile and flat nano-objects having large contact areas with the substrate, and we discuss