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

来源：

LANGMUIR | 2011年 / 27卷 / 01期

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

页码：430 / 435

页数：6