作者:Bo Wang、Miao Wang、Hao Zhang、Nelli S. Sobal、Weijun Tong、Changyou Gao、Yanguang Wang、Michael Giersig、Dayang Wang、Helmuth Möhwald
DOI:10.1039/b705094a
日期:——
In the present work, we succeeded in alternatively depositing inorganic nanoparticles and functionalized DNA bases onto the water/oil interface from the water and oil bulk phases. The ligands used were functional thymines and adenines. Their thiol and phosphate groups were used to cap inorganic nanoparticles and their thymine and adenine groups to alter the surface functionality of the nanoparticles, thus enabling a layer-by-layer growth fashion of nanoparticles at the interface. The multiple particle ligation rendered the resulting nanoparticle films rather mechanically robust. As results, the freestanding asymmetric bilayer and trilayer films, composed of negatively-charged Au, positively-charged CdTe, and/or organic Ag nanoparticles were constructed; their areas were as large as over several centimetres, depending on the sizes of the containers used. Our work should bring up a novel methodology to generate asymmetric multilayer films of nanoparticles with a defined control of electron or charge across the films.
在目前的工作中,我们成功地将无机纳米颗粒和功能化 DNA 碱基从水和油体相交替沉积到水/油界面上。使用的配体是功能性胸腺嘧啶和腺嘌呤。它们的硫醇和磷酸基团被用来覆盖无机纳米颗粒,而它们的胸腺嘧啶和腺嘌呤基团被用来改变纳米颗粒的表面功能,从而使纳米颗粒在界面处实现逐层生长。多颗粒连接使得所得纳米颗粒膜具有相当机械鲁棒性。结果,构建了由带负电的Au、带正电的CdTe和/或有机Ag纳米粒子组成的独立的不对称双层和三层薄膜;它们的面积可达几厘米以上,具体取决于所使用的容器的尺寸。我们的工作应该提出一种新的方法来生成纳米粒子的不对称多层薄膜,并对薄膜上的电子或电荷进行明确的控制。