气-液界面Au纳米粒子网状结构薄膜的制备及SERS性能研究
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摘要
本研究通过自组装法在气-液界面得到Au纳米粒子网状结构,并通过进一步生长得到连续的Au纳米粒子网状结构薄膜.该方法无需加入任何诱导剂,在室温条件下即可得到稳定性良好的纳米金薄膜.通过改变HAuCl_4和AgNO_3相对用量、陈化时间等条件对网状结构薄膜的形成机理进行了研究.结果发现,AgNO_3用量对Au纳米粒子薄膜的形成至关重要,通过调控AgNO_3用量可以促进纳米金粒子间的融合并形成纳米链、进一步演化为纳米链网状结构.在初步形成的Au纳米粒子网状结构表面通过抗坏血酸还原进一步生长纳米金粒子,有利于形成较大面积、较好稳定性的纳米Au粒子网状结构薄膜.以对氨基苯硫酚(4-ATP)作为探针分子,研究表明,与未发生组装的金纳米粒子相比,自组装形成的Au纳米粒子网状结构薄膜对4-ATP具有较强的表面增强拉曼效应.
In this work, Au nanoparticles(Au NPs) network structures were fabricated by the self-assembly method at air-water interface, and the continuous Au NPs network thin films with higher stability can be obtained by further growth at room temperature. The proposed approach does not require any inducer to assist the assembly of Au NPs. The formation mechanism of Au NPs network films was studied by changing the relative amount of HAuCl_4 and AgNO_3 and aging time, and it was found that the amount of AgNO_3 was very important to the formation of Au NPs network structures. AgNO_3 can promote the fusion of Au NPs and the formation of nano-chain, and could further evolve into a nano-chain network structure. A large area and good stability of Au nanoparticles network films were fabricated after further growth of gold nanoparticles by ascorbic acid reduction. Furthermore, the surface enhanced Raman scattering(SERS) activity of the as-prepared Au NPs network films was investigated by using 4-aminothiophenol(4-ATP) as the SERS probe molecule. Compared with unassembled Au NPs, the Au NPs network films showed enhanced SERS performance for 4-ATP.
In this work, Au nanoparticles(Au NPs) network structures were fabricated by the self-assembly method at air-water interface, and the continuous Au NPs network thin films with higher stability can be obtained by further growth at room temperature. The proposed approach does not require any inducer to assist the assembly of Au NPs. The formation mechanism of Au NPs network films was studied by changing the relative amount of HAuCl_4 and AgNO_3 and aging time, and it was found that the amount of AgNO_3 was very important to the formation of Au NPs network structures. AgNO_3 can promote the fusion of Au NPs and the formation of nano-chain, and could further evolve into a nano-chain network structure. A large area and good stability of Au nanoparticles network films were fabricated after further growth of gold nanoparticles by ascorbic acid reduction. Furthermore, the surface enhanced Raman scattering(SERS) activity of the as-prepared Au NPs network films was investigated by using 4-aminothiophenol(4-ATP) as the SERS probe molecule. Compared with unassembled Au NPs, the Au NPs network films showed enhanced SERS performance for 4-ATP.
引文
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6 Xia H,Ran Y,Li H,Tao X,Wang D.J Mater Chem A,2013,1:4678–4684
7 张磊,莫兰,沈晶晶,张颖,汪联辉.科学通报,2016,61:3036–3048
8 Xi C,Marina PF,Xia H,Wang D.Soft Matter,2015,11:4562–4571
9 Mohan M,Mohan N,Chand DK.J Mater Chem A,2015,3:21167–21177
10 Wu DY,Zhang M,Zhao LB,Huang YF,Ren B,Tian ZQ.Sci China Chem,2015,58:574–585
11 Guo P,Huang X,Li L,Zhao S.Chem Res Chin Univ,2017,33:135–142
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13 王桐信,张德清,徐伟,李书宏,朱道本.科学通报,2002,47:1635–1638
14 周雪华,李津如,刘春艳,江龙.中国科学(B辑),2002,32:243–247
15 Han X,Goebl J,Lu Z,Yin Y.Langmuir,2011,27:5282–5289
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17 樊晔,方云,陈韩婷,高迪.高等学校化学学报,2014,35:1933–1940
18 Wang MH,Li YJ,Xie ZX,Liu C,Yeung ES.Mater Chem Phys,2010,119:153–157
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25 Mallin MP,Murphy CJ.Nano Lett,2002,2:1235–1237
26 Akita T,Tanaka K,Tsubota S,Haruta M.J Electron Microsc,2000,49:657–662
27 Zhang P,Xi C,Feng C,Xia H,Wang D,Tao X.Cryst Eng Comm,2014,16:5268–5274
28 Camci MT,Ulgut B,Kocabas C,Suzer S.ACS Omega,2017,2:478–486
29 Yuan H,Ma W,Chen C,Zhao J,Liu J,Zhu H,Gao X.Chem Mater,2007,19:1592–1600
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31 Chen CY,Yoshiba M,Nagoshi T,Chang TFM,Yamane D,Machida K,Masu K,Sone M.Electrochem Commun,2016,67:51–54
32 Sau TK,Murphy CJ.Langmuir,2004,20:6414–6420
33 Burrows ND,Harvey S,Idesis FA,Murphy CJ.Langmuir,2017,33:1891–1907
34 Tong W,Walsh MJ,Mulvaney P,Etheridge J,Funston AM.J Phys Chem C,2017,121:3549–3559
35 Piella J,Bastús NG,Puntes V.Chem Mater,2016,28:1066–1075
36 Garcia AG,Lopes PP,Gomes JF,Pires C,Ferreira EB,Lucena RGM,Gasparotto LHS,Tremiliosi-Filho G.New J Chem,2014,38:2865–2873
37 Bastús NG,Merko?i F,Piella J,Puntes V.Chem Mater,2014,26:2836–2846
38 Chen F,Yang S,Wu Z,Hu W,Hu J,Duan X.Sci China Mater,2017,60:39–48
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