This book presents peer-reviewed articles from the 12th International Conference on Advanced Materials and Engineering Materials (ICAMEM2023), held in Bangkok, Thailand, from December 15 to 18, 2023. ICAMEM has been a prominent platform for sharing current and emerging materials and devices research for over 11 years between researchers and professionals from industry, research laboratories, and academia. Topics in the proceedings include but are not limited to nanomaterials and nanotechnology; graphene technology; polymer science and technology; surface science and engineering; new energy materials; composite materials, etc.