Development of a high-performance gas sensor is essential in human life due to its major role in the field of personal safety, public security, medical diagnosis, detection of environmental toxins, and many more. We are investigating the chemiresistive type of gas sensor, which is a highly sensitive, rapid, reversible and repeatable sensing device. The chemiresistor development in this study aims to detect volatile organic compounds (VOCs) with high sensitivity, selectivity and stability with the potential to be used in promising applications in breath analysis for lung cancer diagnosis. The VOC portion in exhaled breath is different for lung cancer patients and healthy people, which has driven many studies to focus on developing an effective chemical sensor to detect characteristic VOCs in potential patients. Research on high-performance chemiresistors by developing the superior sensing materials and conformation is highly valuable in the social and medical field.

Top-down methods are generally represented as conventional lithographic techniques in semiconductor industry using photo masks. Nowadays, the development of high resolution nanostructure with various shapes is required for high performance and various applications in optic and electronic devices. We are developing new lithographic techniques based on top-down approach for realization of high performance device in nanotechnology.

As soft materials, liquid crystal (LC) and supramolecular dendrimers are self-assembling building blocks having numerous merits such as the ability to form a very small feature size (sub-10nm), various ordered phases, diversity in chemical functionality, and rapid construction of nano-structure with high ordering. The application areas of liquid crystals and supramolecules are optoelectronic materials, particle trapping, 3D microlens array, selective membranes, and novel nano-lithographic templates. Our group proceeds in-depth studies for supramolecules and liquid crystal self-assembly for nano-fabrication and try to use them in practical applications.