CAJ | 학술논문

通过柠檬酸钠还原银离子,以银纳米粒子为种子,在室温下制备出平均厚度约为5nm,尺寸40到500nm可调的三角形银纳米片.通过种子调停法可实现银纳米盘的面内偶极表面等离子体共振峰(SPR)从最初的520 nm红移至1100 nm.通过控制实验参数能够很好地理解其生长机制.柠檬酸根离子和增加到生长液里面的银纳米种子是2个重要的参数,可以控制银纳米盘的大小却不改变银纳米盘的厚度以及晶面结构.采用PVP作为包覆剂,其作用机理还不是很清楚,需要进一步的研究.
통과저몽산납환원은리자,이은납미입자위충자,재실온하제비출평균후도약위5nm,척촌40도500nm가조적삼각형은납미편.통과충자조정법가실현은납미반적면내우겁표면등리자체공진봉(SPR)종최초적520 nm홍이지1100 nm.통과공제실험삼수능구흔호지리해기생장궤제.저몽산근리자화증가도생장액리면적은납미충자시2개중요적삼수,가이공제은납미반적대소각불개변은납미반적후도이급정면결구.채용PVP작위포복제,기작용궤리환불시흔청초,수요진일보적연구.
Silver nanoplates,with average thickness about 5 nm and average tunable size from 40 to 500 nm,were synthesized via a simple room-temperature solution-phase chemical reduction method in the presence of appropriate concentration of trisodium citrate and silver seeds.The optical in-plane dipole plasmon resonance bands of these silver plates could be tuned from 520 to 1100 nm.Control experiments were explored for understanding of the growth mechanism.It is found that both the amount of citrate ions and the small silver seeds added to the growth solution are the key to controlling the silver nanoplates without changing their thickness and crystal structure.Small silver seeds are found to play an important role in the formation of large thin silver nanoplates when poly(vinylpyrrolidone) (PVP) are used as capping agent.