在硼氢化钠和双氧水共存的体系中还原硝酸银,以聚乙烯吡咯烷酮(PVP)为表面活性剂,在柠檬酸钠的作用下制成了平均边长39.4±7.4nm、平均厚度4.3±0.7nm的三角形银纳米盘,它在近红外区(≈750～1000nm)具有强烈的面内偶极共振吸收;研究了各反应试剂加入量改变的条件下产物的紫外-可见吸收光谱,探讨了反应的机理.结果表明:柠檬酸根在银晶核不同晶面上的择优吸附对三角盘的形状生成起决定作用,PVP通过包覆作用防止纳米粒子团聚.三维荧光光谱测试结果得出,三角形银纳米盘有2个中心激发波长262nm和352nm,在这2个波长的激发下均具有2个中心发射波长415nm和438nm,表现出与球形银纳米粒子完全不同的光致发光性质.
参考文献
| [1] | Jorge Perez-Juste;Isabel Pastoriza-Santos;Luis M. Liz-Marzan;Paul Mulvaney .Gold nanorods: Synthesis, characterization and applications[J].Coordination chemistry reviews,2005(17/18):1870-1901. |
| [2] | 杨声海,陈永明,杨建广,巨少华,唐谟堂.湿法制备纳米结构银研究进展[J].贵金属,2006(03):58-74. |
| [3] | Jin R C;Cao Y W;Mirkin C A .Photoinduced conversion of silver nanospheres to nanoprisms[J].Science,2001,294(5548):1901-1903. |
| [4] | 田雪林,王卫华,陈锴,曹更玉.利用紫外-可见光谱研究水溶液中银纳米盘的生长过程及稳定性[J].化学物理学报,2006(04):362-366. |
| [5] | 贺蓉,钱雪峰,印杰,朱子康,王海林.银纳米棱镜的形成及其光学性能研究[J].高等学校化学学报,2003(08):1341-1345. |
| [6] | Maillard M;Huang P;Brus L .Ag nanodisk growth by surface plasmon enhanced photoreduction of adsorbed[Ag+][J].Nano Letters,2003,3(11):1611-1615. |
| [7] | Bastys V;Pastoriza-Santos I;Rodriguez-Gonzalez B;Vaisnoras R;Liz-Marzan LM .Formation of silver nanoprisms with surface plasmons at communication wavelengths[J].Advanced functional materials,2006(6):766-773. |
| [8] | 刘钟馨,宋宏伟,于立新,杨林梅.纳米 Au 球壳材料的制备及其近红外光热转换性质[J].发光学报,2005(03):395-398. |
| [9] | John S;Pang G .Theory of lasing in a multiple-scattering medium[J].Physical Review A,1996,54(04):3642-3652. |
| [10] | Shuford KL;Ratner MA;Schatz GC .Multipolar excitation in triangular nanoprisms[J].The Journal of Chemical Physics,2005(11):4713-1-4713-9-0. |
| [11] | Mie G .Beitrage zur optik trüber medien,speziel kolloidaler metall(o)sungen[J].Annals of Physics,1908,25(04):377-445. |
| [12] | Yugang Sun;Byron Gates;Brian Mayers;Younan Xia .Crystalline Silver Nanowires by Soft Solution Processing[J].Nano letters,2002(2):165-168. |
| [13] | Jain PK;Eustis S;El-Sayed MA .Plasmon coupling in nanorod assemblies: Optical absorption, discrete dipole approximation simulation, and exciton-coupling model[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(37):18243-18253. |
| [14] | Nikhil R.Jana;Latha Gearheart;Catherine J.Murphy .Wet chemical synthesis of silver nanorods and nanowires of controllable aspect ratio[J].Chemical communications,2001(7):617-618. |
| [15] | Jian-Qiang Hu;Qing Chen;Zhao-Xiong Xie;Guo-Bin Han;Rui-Hong Wang;Bin Ren;Yong Zhang;Zhi-Lin Yang;Zhong-Qun Tian .A Simple and Effective Route for the Synthesis of Crystalline Silver Nanorods and Nanowires[J].Advanced functional materials,2004(2):183-189. |
| [16] | Jiang P;Li SY;Xie SS;Gao Y;Song L .Machinable long PVP-stabilized silver nanowires[J].Chemistry: A European journal,2004(19):4817-4821. |
| [17] | 胡寒梅,邓崇海,刘瑾,孙梅,周海鸥,张克华.高分子辅助水热制备单晶碲纳米管[J].无机化学学报,2007(03):529-532. |
| [18] | Aslan K;Lakowicz J R;Geddes C D .Rapid deposition of triangular silver nanoplates on planar surfaces:application to metal-enhanced fluorescence[J].Journal of Physical Chemistry B,2005,109:6247-6251. |
| [19] | Mohamed MB.;Link S.;El-Sayed MA.;Volkov V. .The 'lightning' gold nanorods: fluorescence enhancement of over a million compared to the gold metal[J].Chemical Physics Letters,2000(6):517-523. |
| [20] | 梁海春,容敏智,章明秋,曾汉民.微乳液法制备纳米银粒子的结构及其荧光现象研究[J].物理学报,2002(01):49-54. |
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