以柠檬酸盐为还原剂,通过共还原氯金酸和硝酸银的混合溶液制备出Au/Ag合金纳米颗粒,用透射电子显微镜(TEM)对颗粒的形貌和尺寸进行了表征.300-800nm范围的吸收光谱研究发现,Au/Ag合金纳米颗粒具有单峰等离子体吸收特征,且随着反应液中氯化金和硝酸银的摩尔比的减少,吸收峰将产生蓝移.实验结果表明, Au-Ag合金纳米颗粒的光学吸收特性具有组分可裁剪性,使其在纳米尺度的光学领域具有潜在的应用价值.
参考文献
| [1] | Hengllein A .Physicochemical properties of small metal particles in solution:"microelectrode" reactions,chemisorption,composite metal particles,and the atom-to-metal transition[J].Journal of Physical Chemistry,1993,97:5457-5471. |
| [2] | Kreibig U;Vollmer M.Optical properties of metal clusters[M].Berlin:Springer-Verlog,1995:14-41. |
| [3] | Mulvaney P .Surface plasmon spectroscopy of nanosized metal particles[J].Langmuir,1996,12:788-800. |
| [4] | Link S;El-Sayed M A .Spectra properties and relaxation dynamics of surface plasmon electronic oscillations in gold and silver nanodots and nanorods[J].Journal of Physical Chemistry B,1999,103:8410-8426. |
| [5] | Hodak J H;Henglein A;Hartland G V .Photophysics of nanometer sized metal particles:Electron-phonon coupling and coherent excitation of breathing vibrational modes[J].Journal of Physical Chemistry B,2000,104:9954-9965. |
| [6] | Chikara Amano;Osamu Miura;Keita Kuwahara;Kazuhiko Morio .Linearity in Optical Absorption Spectra and Gold-Silver AlloyColloidal Particles in Epoxy Resin[J].Journal of Colloid and Interface Science,2001(2):379-381. |
| [7] | Inhyung Lee;Sang Woo Han;Kwan Kim .Production of Au-Ag Alloy Nanoparticles by Laser Ablation of Bulk Alloys[J].Chemical communications,2001(18):1782-1783. |
| [8] | Hideki Nabika;Minoru Mizuhata;Akihiko Kajinami;Shigehito Deki;Kensuke Akamatsu .Preparation and characterization of Au/Co nano-alloys[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2003(0):99-102. |
| [9] | Hua Zhang;Rongchao;Chad A.Mirkin .Synthesis of Open-Ended,Cylindrical Au-Ag Alloy Nanostructures on a Si/SiO_x Surface[J].Nano letters,2004(8):1493-1495. |
| [10] | Brust M;Walker M;Bethell D.Synthesis of thiol-derivatised gold nanoparticles in a two-phase liquid-liquid system[J].Journal of the Chemical Society,Chemical Communications,1994:801-802. |
| [11] | Jana N R;Gearheart L;Murphy C J .Wet chemical synthesis of high aspect ratio cylindrical gold nanorods[J].Journal of Physical Chemistry B,2001,105:4065-4067. |
| [12] | 闫仕农,王永昌,郝丽梅,魏天杰.Au/Ag芯-壳复合结构纳米颗粒的制备和表征[J].功能材料,2005(03):425-426,430. |
| [13] | Zhu J.;Wang YC.;Huang LQ.;Lu YM. .Resonance light scattering characters of core-shell structure of Au-Ag nanoparticles[J].Physics Letters, A,2004(5/6):455-459. |
| [14] | Jana N R;Gearheart L;Murphy C.Wet chemical synthesis of silver nanorods and nanowires of controllable aspect ratios[J].Chemical Communications,2001:617-618. |
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