**Acknowledgements**

My deepest gratitude goes to my advisors, Prof. Jerome Castellon and Prof. Serge Agnel. Without their continuous support and guidance, I was not able to complete this task. I have benefited tremendously from their vision and technical insights.

I am also greatly indebted to my parents for their incredible love, endless encouragement, and heartfelt prayers. My special thanks are extended to Prof. Jean Pierre Habbas and his team in the Institute Charles Gerhardt Montpellier for providing his polymer synthesis laboratory and a friendly environment to synthesize the samples. He never let me stuck in the chemical synthesis process whenever I faced difficulty, and he was there to solve it and always come up with a solution. I also express my warmest gratitude to Prof. Zhou kai from the Sichuan University Chengdu China to provide moral and technical support to finish this task on time.
