Facile stabilization of gold-silver alloy nanoparticles on cellulose nanocrystal
Facile stabilization of gold-silver alloy nanoparticles on cellulose nanocrystal
复制标题
DOI：
10.1021/jp710767w
复制
发表时间：
2008-04-03
影响因子：
3.7
通讯作者：
Exarhos, Gregory J.
中科院分区：
文献类型：
--
作者：
Shin, Yongsoon;Bae, In-Tae;Exarhos, Gregory J.
采用相应金属离子共还原法在纤维素基片（CNXL）上制备了均匀的金银合金纳米粒子。CNXL起到基体和稳定剂的双重作用，已被用于获得合金纳米颗粒的稳定分散体。合金纳米颗粒的组成表明金属离子在CNXL表面上的定量存款，然后还原。采用柠檬酸钠作为封端剂，可以将合金纳米粒子的粒径控制在3-7 nm之间，且其平均粒径随Ag含量的增加而增大。采用紫外-可见光谱、场发射扫描电镜（FE-SEM）、透射电镜（TEM）和X射线衍射（XRD）对Au-Ag合金纳米粒子的水悬浮液及其干膜进行了表征。
Uniform Au-Ag alloy nanoparticles have been synthesized on cellulose nanocrystal (CNXL) by the co-reduction method of corresponding metal ions. CNXL that plays a dual role of a matrix and of a stabilizer has been used to obtain stable dispersions of alloy nanoparticles. The composition of alloy nanoparticles indicates a quantitative deposit of metal ions on CNXL surface followed by reduction. The sizes of alloy nanoparticles were controlled in the range of 3-7 nm by capping agent, sodium citrate, and their average diameter was increased with an increase of Ag content. Aqueous suspensions of Au-Ag alloy nanoparticles and their dried films are characterized by UV-vis spectroscopy, field emission-scanning electron microscope (FE-SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD).