Expressing appreciation is always challenging, especially when a simple "thank you" seems insufficient. Someone once told me that achieving success requires the help of at least ten people. At the time, I quietly disagreed. I carried a simple, almost childlike belief that success was purely the product of personal effort. I thought grit and discipline were enough, that if I pushed hard enough, I could claim every achievement as mine alone. I did not yet understand how many unseen hands were holding me up along the way.

Looking back through the gratitude log I have kept over the years, I now see what I once could not.

Success is never solitary.

When I began this journey, I thought I was pursuing a degree. I did not realize I was learning how to endure uncertainty, how to sit with failure without collapsing, how to speak when I was unsure, and how to trust that effort would eventually find its meaning. Somewhere between experiments that did not work and drafts that had to be rewritten, I changed. And I did not change alone. This thesis is not only a record of research. It is quiet evidence of growth. It was written in laboratories, libraries, and long nights of doubt. It exists because certain people refused to let me lose direction, especially during the moments when I was overwhelmed and could not see the way forward.

This is going to be the longest gratitude letter I have ever written.

To my supervisors, Associate Professor Chanat Chokejaroenrat and Associate Professor Chainarong Sakulthaew, I owe you more than words of acknowledgment can fully express. Your intelligence, rigor, and patience shaped this thesis into something far stronger than I could have achieved alone. You offered more than corrections. You offered perspective, discipline, and encouragement. Your expectations stretched me beyond what I ever believed I could become. Through them, I learned not only how to do research, but how to think more clearly and live more deliberately. The knowledge and wisdom you have imparted will remain with me for a lifetime.

To Professor Yao-Tung Lin, Professor Xu Qingfeng, Professor Dionissios Mantzavinos, and Associate Professor Zacharias Frontistis, it has been a true privilege and honor to be part of your laboratory. Being able to do research under your guidance has given me far more than academic training. I gained not only scientific knowledge and professional experience, but also meaningful friendships and a broader way of seeing the world. I am deeply grateful for your generosity and for the guidance you provided throughout this journey.

To my labmates and classmates, especially Toey, Jay, P’Force, Jam, and Zhen, thank you for turning long hours into shared endurance. Research can be lonely, but you made it human. Your presence transformed ordinary days into lighter, more bearable ones.

To Folk, Pream, and everyone in the lab who supported me, whether through experiments, troubleshooting, or simple encouragement, I appreciate your kindness.

To the scientists and general administrative staff, Pare, Sa, Blue, Ton, Pla, Jui, Pugun, and Kwang, who have always been there to assist, thank you for your generosity and readiness to help. Your steady assistance made the path smoother, and I am deeply grateful.

To Prai, who has treated me with unwavering sincerity from the very beginning, thank you for listening not only to my words, but also to my doubts and quiet worries without ever showing any sign of impatience. Thank you for grounding me when my expectations became heavier than they needed to be. Your presence gave me balance when I leaned too far into achievement. Your kindness, given freely and without expectation, has shaped who I am becoming.