TY - JOUR
T1 - Investigating the multiple roles of polyvinylpyrrolidone for a general methodology of oxide encapsulation
AU - Sun, Hang
AU - He, Jiating
AU - Wang, Jiangyan
AU - Zhang, Shuang Yuan
AU - Liu, Cuicui
AU - Sritharan, Thirumany
AU - Mhaisalkar, Subodh
AU - Han, Ming Yong
AU - Wang, Dan
AU - Chen, Hongyu
PY - 2013/6/19
Y1 - 2013/6/19
N2 - Growing oxide shells on seed nanoparticles requires the control of several processes: (a) the nucleation and growth of the shell material; (b) the "wetting" of the shell material on the seeds; and (c) the aggregation of the nanoparticles. These processes are influenced by a number of factors, many of which are related. Without understanding the interdependence of these contributing factors, it is difficult to circumvent problems and achieve rational synthesis. We first did a case study on encapsulating Au nanoparticles with ZnO to understand the multiple roles of polyvinylpyrrolidone (PVP) and their dependence on other factors. We developed a general method for coating ZnO on a variety of seeds, including metals, oxides, polymer nanoparticles, graphene oxide, and carbon nanotube. This method can be further extended to include Fe3O4, MnO, Co2O3, TiO 2, Eu2O3, Tb2O3, Gd 2O3, β-Ni(OH)2, ZnS, and CdS as the shell materials. The understanding obtained in this systematic study will aid rational design and synthesis of other core-shell nanostructures.
AB - Growing oxide shells on seed nanoparticles requires the control of several processes: (a) the nucleation and growth of the shell material; (b) the "wetting" of the shell material on the seeds; and (c) the aggregation of the nanoparticles. These processes are influenced by a number of factors, many of which are related. Without understanding the interdependence of these contributing factors, it is difficult to circumvent problems and achieve rational synthesis. We first did a case study on encapsulating Au nanoparticles with ZnO to understand the multiple roles of polyvinylpyrrolidone (PVP) and their dependence on other factors. We developed a general method for coating ZnO on a variety of seeds, including metals, oxides, polymer nanoparticles, graphene oxide, and carbon nanotube. This method can be further extended to include Fe3O4, MnO, Co2O3, TiO 2, Eu2O3, Tb2O3, Gd 2O3, β-Ni(OH)2, ZnS, and CdS as the shell materials. The understanding obtained in this systematic study will aid rational design and synthesis of other core-shell nanostructures.
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U2 - 10.1021/ja4035335
DO - 10.1021/ja4035335
M3 - Article
AN - SCOPUS:84879403343
SN - 0002-7863
VL - 135
SP - 9099
EP - 9110
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 24
ER -