Publications by authors named "Won Taek Jung"

Electronic textile-based gas sensors with a high response for NO gas were fabricated using reduced graphene oxide (rGO)-coated commercial cotton fabric (rGOC). Graphene oxide (GO) was coated on cotton fabric by simply dipping the cotton into a GO solution. To investigate the relationship between the degree of reduction and the sensing response, the GO-coated fabrics were thermally reduced at various temperatures (190, 200, 300, and 400 °C).

View Article and Find Full Text PDF

An electronic textile-based NO gas sensor was fabricated using commercial silk and graphene oxide (GO). It showed a fast response time and excellent sensing performance, which was simply accomplished by modifying the heat-treatment process. The heat treatment was conducted at 400 °C and different heating rates of 1, 3, and 5 °C/min.

View Article and Find Full Text PDF

Pyroprotein-based carbon materials produced by heat-treating silk proteins have many potential applications in electronic devices, such as electronic textiles. To further develop potential electronic devices using these pyroproteins, the charge transport mechanism has to be verified. However, the electrical characteristics of the pyroproteins have not been reported yet.

View Article and Find Full Text PDF

In the oxidative dehydrogenation (ODH) process that converts ethylbenzene to styrene, vanadium-based catalysts, especially VO, are used in a CO atmosphere to enhance process efficiency. Here we demonstrate that the activation energy of VO can be manipulated by exposure to high pressure CO, using VO nanowires (VON). The oxidation of V to V was observed by X-ray photoelectron spectroscopy.

View Article and Find Full Text PDF