Understanding of Charge Effects in Pickering Emulsions and Design of Double Pickering Emulsion Templated Composite Microcapsules

[To my family for their love and support] iv ACKNOWLEDGEMENTS There are many people I would like to thank for their support throughout my Ph.D. study at Georgia Tech. I would like first express my tons of gratitude to my advisor Dr. Behrens for his invaluable support that I will remember for ever. I will remember his great guidance whenever I encounter a problem in my thesis work; I will remember his encouragements whenever I feel frustrated in my life; I will remember his great suggestions in my job seeking; I will remember his generous help in securing my funding for the last semester. In one word, I feel great honored to be a student working with Dr. Behrens, and he is more than a super advisor for research, also a friend for life, a mentor for career, and a role model for follow. I also would like to thank my thesis committee members, Dr. Carson Meredith for their comments, suggestions, and time throughout the completion of my thesis work. for imparting their knowledge and skills to me and training me for the use of equipment when I entered the lab in my first year; I also would like to thank my current lab mates, and Yi Zhang for their help and being such great colleagues. I wish you all a successful future in both research and career! Special thanks should be given to our collaborators, Dr. Nguyen from Vietnam National University for modeling the dipole field of a charged particle at oil-water interfaces and Dr. Isa from ETH for contact angle measurements with FreSca cryo-SEM v methods; To Dr.