通过电沉积法制备出了Ag - Cu纳米枝晶,并表征了样品的晶体结构、微观形貌以及光学吸收特性.结果表明:当Ag+:Cu2＞1时,制备出银铜纳米单相合金,Ag+:Cu2+＜ 1/4时,制备出银铜纳米双相合金.当E=-0.2V时,形成单个银铜纳米粒子和粒子团簇,吸收峰位于402 nm处:随着沉积电位的增加,形成纳米枝晶,且光学吸收峰发生蓝移.在不同成分的银铜合金中,当Ag+Cu2+=4:1时,形成银铜纳米枝晶,吸收峰在358 nm处,随着铜元素的增加,枝晶尺寸减小,光学吸收峰红移.结合电结晶理论和经典枝晶生长理论解释了Ag - Cu纳米枝晶的形成机制.
参考文献
| [1] | Ri Qiu;Hyun Gil Cha;Hui Bog Noh .Preparation of Dendritic Copper Nanostructures and Their Characterization for Electroreduction[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(36):15891-15896. |
| [2] | Heon-Cheol Shin;Jian Dong;Meilin Liu .Nanoporous Structures Prepared by an Electrochemical Deposition Process[J].Advanced Materials,2003(19):1610-1614. |
| [3] | Jing CY;Fang Y .Simple method for electrochemical preparation of silver dendrites used as active and stable SERS substrate[J].Journal of Colloid and Interface Science,2007(1):46-51. |
| [4] | Qiu T;Zhou Y J;Li J Q et al.Hot spots in highly Raman-enhancing silver nano-dendrites[J].Journal of Physics D: Applied Physics,2009,42:175403. |
| [5] | Gutes, A;Carraro, C;Maboudian, R .Silver Dendrites from Galvanic Displacement on Commercial Aluminum Foil As an Effective SERS Substrate[J].Journal of the American Chemical Society,2010(5):1476-1477. |
| [6] | Zhang XJ;Wang GF;Liu XW;Wu HQ;Fang B .Copper dendrites: Synthesis, mechanism discussion, and application in determination of L-tyrosine[J].Crystal growth & design,2008(4):1430-1434. |
| [7] | Hu CQ;Gao Z;Yang XR .A facile hydrothermal route to synthesis of nonporous and porous hierarchical copper dendrites[J].Journal of Crystal Growth,2007(2):390-394. |
| [8] | Panda B R;Rao P N;Paul A et al.Electrochemical actuation of growing copper dendrimers in water[J].Journal of Physical Chemistry B,2006,110:22917-22922. |
| [9] | Xiuwen Zheng;Liying Zhu;Xinjun Wang;Aihui Yan;Yi Xie .A simple mixed surfactant route for the preparation of noble metal dendrites[J].Journal of Crystal Growth,2004(1/2):255-262. |
| [10] | Liang Wang;Hongjing Wang;Yoshihiro Nemoto .Rapid and Efficient Synthesis of Platinum Nanodendrites with High Surface Area by Chemical Reduction with Formic Acid[J].Chemistry of Materials: A Publication of the American Chemistry Society,2010(9):2835-2841. |
| [11] | Watt, J.;Cheong, S.;Toney, M.F.;Ingham, B.;Cookson, J.;Bishop, P.T.;Tilley, R.D. .Ultrafast growth of highly branched palladium nanostructures for catalysis[J].ACS nano,2010(1):396-402. |
| [12] | Yan-Yan Song;Zhi-Da Gao;John J. Kelly .Galvanic Deposition of Nanostructured Noble-Metal Films on Silicon[J].Electrochemical and solid-state letters,2005(10):C148-C150. |
| [13] | Zhou Y.;Wang CY.;Li XG.;Zhu YR.;Chen ZY.;Yu SH. .A novel ultraviolet irradiation photoreduction technique for the preparation of single-crystal Ag nanorods and Ag dendrites[J].Advanced Materials,1999(10):850-852. |
| [14] | Yan CL;Xue DF .A modified electroless deposition route to dendritic Cu metal nanostructures[J].Crystal growth & design,2008(6):1849-1854. |
| [15] | Li GP;Luo YJ .Preparation and characterization of dendrimer-templated Ag-Cu bimetallic nanoclusters[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2008(1):360-364. |
| [16] | Chen, X.;Cui, C.-H.;Guo, Z.;Liu, J.-H.;Huang, X.-J.;Yu, S.-H. .Unique heterogeneous silver-copper dendrites with a trace amount of uniformly distributed elemental cu and their enhanced SERS properties[J].Small,2011(7):858-863. |
| [17] | 吴辉煌.应用电化学基础[M].厦门:厦门大学出版社,2006:337-340. |
| [18] | Mie G.A .Beitrage zur optik trüber medien,speziell kolloidaler metallosungen[J].Annals of Physics,1908,25:377-445. |
| [19] | L. Yang;G. H. Li;L. D. Zhang .Effects of surface resonance state on the plasmon resonance absorption of Ag nanoparticles embedded in partially oxidized amorphous Si matrix[J].Applied physics letters,2000(12):1537-1539. |
| [20] | Zhou X;Zhao X P .Resonant condition of unitary dendritic structure with overlapping negative permittivity and permeability[J].Applied Physics Letters,2007,91:181908. |
| [21] | M. W. Klein;C. Enkrich;M. Wegener;C. M. Soukoulis;S. Linden .Single-slit split-ring resonators at optical frequencies: limits of size scaling[J].Optics Letters,2006(9):1259-1261. |
| [22] | Sunagawa I.Morphology of crystals[M].Kluwer Acaddemic,Dordrecht:The Netherlands,1987:509-587. |
| [23] | Qiu R;Zhang XL;Qiao R;Li Y;Kim YI;Kang YS .CuNi dendritic material: Synthesis, mechanism discussion, and application as glucose sensor[J].Chemistry of Materials: A Publication of the American Chemistry Society,2007(17):4174-4180. |
| [24] | 胡汉起;沈宁福;姚山.金属凝固原理[M].北京:机械工业出版社,2008:101-121. |
| [25] | M.E. Glicksman;A.O. Lupulescu .Dendritic crystal growth in pure materials[J].Journal of Crystal Growth,2004(4):541-549. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%