음이온 조절을 통한 은 나노큐브의 균일 씨앗-매개 성장

다국어 초록 (Multilingual Abstract)

Silver (Ag) nanocubes have garnered significant attention in the field of nanophotonics due to their capability to generate strong localized surface plasmon resonance (LSPR) peaks and hotspots, thereby enabling high-sensitivity molecular detection and label-free bioimaging. While nanoscale Ag cubes exhibit these properties, scaling them up to the microscale while preserving sharpness and uniformity is essential for enhanced surface-enhanced infrared absorption (SEIRA) effects and practical sensor applications. However, conventional synthesis methods encounter challenges in maintaining high-quality attributes during size enlargement.
In this study, single-crystal Ag nanocubes were synthesized using the polyol reduction method, and uniform microcubes were produced through optimization of seed-mediated growth. Experiments involving mixed precursors (AgNO3 and CF3COOAg) and a single precursor (AgNO3) were performed to achieve a balanced control over reduction rates, shape, and uniformity. Initial seed nanocubes (average diameter d = 47.90 nm, relative standard deviation RSD = 7%) were enlarged via iterative growth stages. By employing an optimized AgNO3:CF3COOAg ratio of 8:2 in the early stages and switching to AgNO3 as the sole precursor in subsequent stages, microcubes attained d = 2.61 μm with RSD = 5.23% at the seventh growth stage, exhibiting enhanced uniformity. This approach overcomes size limitations in Ag nanocube synthesis, facilitating practical applications in LSPR- and SEIRA-based molecular sensing and
biosensors.

목차 (Table of Contents)

• 제 1 장 서 론 1
• 제 2 장 이론적 배경 3
• 2.1 Ag 나노입자 3
• 2.2 Ag 나노큐브 3
• 2.3 Ag 나노큐브 성장연구 6
• 제 3 장 실 험 8
• 3.1 시약 및 재료 8
• 3.2 Ag 나노큐브 합성 및 성장 8
• 3.2.1 Ag 나노큐브 합성 8
• 3.2.2 첫 번째 씨앗 나노큐브 성장 9
• 3.2.3 후속 씨앗 나노큐브 성장 9
• 3.3 특성평가 10
• 제 4 장 결과 및 고찰 15
• 4.1 씨앗 Ag 나노큐브 합성 15
• 4.2 Ag 나노큐브 성장 15
• 4.2.1 AgNO3 기반 성장 15
• 4.2.2 CF3COOAg 도입 성장 18
• 4.2.3 AgNO3와 CF3COOAg 혼합 전구체 기반 성장 22
• 4.3 AgNO3 단독 전구체를 이용한 성장 최적화 24
• 제 5 장 결 론 29
• [참고 문헌] 31