Dr. Pichitchai Pimpang is an applied physicist at the Faculty of Science and Technology, Pibulsongkram Rajabhat University (PSRU), Thailand. He received his Ph.D. in Applied Physics from Chiang Mai University, focusing on the optical and electronic properties of low-dimensional nanomaterials. In 2013, he was a Research Fellow at the School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia, where he conducted research on nanostructured semiconductors and surface physics. His research spans graphene quantum dots (GQDs), ZnO nanostructures, and metal-based nanomaterials such as gold and silver nanoparticles for applications in fluorescence and electrochemical sensing, photocatalysis, plasmonic enhancement, and solar energy devices. He has published in Applied Surface Science, The Journal of Physical Chemistry C, ACS Omega, Journal of Metals, Materials and Minerals, and Chiang Mai Journal of Science. He is a member of the Thai Physics Society and a recipient of PSRU Research Grant Awards for his innovative work on graphene- and metal-based hybrid sensors.