4-(Dimethylamino)pyridine as a Powerful Auxiliary Reagent in the Electroless Synthesis of Gold Nanotubes

被引:34
作者
Muench, Falk [1 ]
Kunz, Ulrike [1 ]
Neetzel, Cornelia [1 ]
Lauterbach, Stefan [1 ]
Kleebe, Hans-Joachim [1 ]
Ensinger, Wolfgang [1 ]
机构
[1] Tech Univ Darmstadt, Dept Mat & Geosci, D-64287 Darmstadt, Germany
关键词
AU NANOPARTICLES; ARRAYS; REDUCTION; NANOWIRES; MEMBRANES; GROWTH;
D O I
10.1021/la104015a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Gold nanotubes of small particle sizes down to 5 nm and high aspect ratios were synthesized in ion track etched polycarbonate: following a rational reaction design. 4-(Dimethylamino)pyridine (DMAP) was employed to adjust the electroless deposition by interfering with the autocatalytically active gold surface. Modification of the pH value and DMAP concentration led to a wide range of products which were characterized by SEM, TEM, and EDS. Filigree nanotubes of 10-15 nm wall thickness and 5.0 +/- 2.1 nm grain size were obtained as well as robust and free-standing structures proving homogeneous deposition along the whole template length of 30 mu m. Template-supported gold nanotubes were applied in the UV-vis monitored reduction of 4-nitrophenol by sodium borohydride under pseudo-first-order conditions. They proved to be a reliable microfluidic system of excellent catalytic activity coming up with an apparent rate constant of 1.3 x 10(-2) s(-1). Despite a high flow rate, the reaction showed 99% conversion after a distance of just 60 mu m.
引用
收藏
页码:430 / 435
页数:6
相关论文
共 40 条
[11]  
Gittins DI, 2002, ADV MATER, V14, P508, DOI 10.1002/1521-4095(20020404)14:7<508::AID-ADMA508>3.3.CO
[12]  
2-K
[13]  
Gittins DI, 2001, ANGEW CHEM INT EDIT, V40, P3001, DOI 10.1002/1521-3773(20010817)40:16<3001::AID-ANIE3001>3.0.CO
[14]  
2-5
[15]   Tin/platinum bimetallic nanotube array and its electrocatalytic activity for methanol oxidation [J].
Guo, YG ;
Hu, JS ;
Zhang, HM ;
Liang, HP ;
Wan, LJ ;
Bai, CL .
ADVANCED MATERIALS, 2005, 17 (06) :746-+
[16]   Fabrication and optical properties of gold nanotube arrays [J].
Hendren, W. R. ;
Murphy, A. ;
Evans, P. ;
O'Connor, D. ;
Wurtz, G. A. ;
Zayats, A. V. ;
Atkinson, R. ;
Pollard, R. J. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (36)
[17]   Ag Dendrite-Based Au/Ag Bimetallic Nanostructures with Strongly Enhanced Catalytic Activity [J].
Huang, Jianfeng ;
Vongehr, Sascha ;
Tang, Shaochun ;
Lu, Haiming ;
Shen, Jiancang ;
Meng, Xiangkang .
LANGMUIR, 2009, 25 (19) :11890-11896
[18]   Nanotubule-based molecular-filtration membranes [J].
Jirage, KB ;
Hulteen, JC ;
Martin, CR .
SCIENCE, 1997, 278 (5338) :655-658
[19]   Synthesis of gold nanowires with controlled crystallographic characteristics [J].
Karim, S. ;
Toimil-Molares, M. E. ;
Maurer, F. ;
Miehe, G. ;
Ensinger, W. ;
Liu, J. ;
Cornelius, T. W. ;
Neumann, R. .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 84 (04) :403-407
[20]   Direct immobilization of Fab′ in nanocapillaries for manipulating mass-limited samples [J].
Kim, Bo Young ;
Swearingen, Carla B. ;
Ho, Ja-an A. ;
Romanova, Elena V. ;
Bohn, Paul W. ;
Sweedler, Jonathan V. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (24) :7620-7626