Facile control of DNA-templated inorganic nanoshell size.
Facile control of DNA-templated inorganic nanoshell size.
复制标题
DOI：
10.1166/jnn.2012.5383
复制
发表时间：
2012
影响因子：
--
通讯作者：
Shengyan Pu;A. Zinchenko;S. Murata
中科院分区：
文献类型：
--
作者：
Shengyan Pu;A. Zinchenko;S. Murata
我们阐述了一种简单的方法来控制DNA辅助“双模板”方法获得的CdS纳米壳的大小。通过改变溶液中NaCl的浓度来改变DNA静电沉积在阳离子硅珠上的程度，我们成功地控制了吸附在硅珠上的DNA的密度，进而控制了生长在DNA上的CdS材料的密度。进一步溶解二氧化硅核会引起不同程度的CdS壳的收缩，这取决于CdS壳密度，并导致形成不同尺寸的CdS纳米壳，从约100 nm到约400 nm不等。因此，所提出的方法的主要优点是，它可以用来合成各种尺寸的空心纳米壳，从主模板（二氧化硅珠）的约25%到约75%的尺寸，仅使用一个单一的主模板。
We elaborated a facile method to control the size of CdS nanoshells obtained by DNA assisted "double templating" approach. By changing the concentration of NaCl in solution to vary the extent of DNA electrostatic deposition on cationic silica beads, we succeeded to control the density of DNA adsorbed on the beads, and further the density of CdS material grown on DNA. Further dissolution of the silica core triggers shrinking of CdS shell to a different extent depending on the CdS shell density and results in formation of CdS nanoshells of different sizes from ca. 100 nm to ca. 400 nm. Therefore, the main advantage of the proposed method is that it can be used to synthesize hollow nanoshells of various sizes, from ca. 25% to ca. 75% size of the primary template (silica bead), by using only one single primary template.