Shape-controlled synthesis of poly(styrene sulfonate) and poly(vinyl pyrolidone) capped lead sulfide nanocubes, bars, and threads

被引：21

作者：

Bakshi, Mandeep Singh ^{[1
,3
]}

Kaur, Gurinder ^{[4
]}

Possmayer, Fred ^{[2
]}

Petersen, Nils O. ^{[1
,5
]}

机构：

[1] Univ Western Ontario, Dept Chem, London, ON N6A 5A5, Canada

[2] Univ Western Ontario, Dept Biochem, London, ON N6A 5A5, Canada

[3] Guru Nanak Dev Univ, Dept Chem, Amritsar 143005, Punjab, India

[4] Coll N Atlantic, Dept Phys, Lebrador City, NF A2V 2K7, Canada

[5] Natl Inst Nanotechnol, Edmonton, AB, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 13期

关键词：

D O I：

10.1021/jp711925b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead sulfide nanocrystals (NCs) along with nanothreads and nanosheets were synthesized in the presence of water soluble polymers such as poly(styrene sulfonate) sodium salt (PSS) and poly(vinyl pyrolidone) (PVP) in aqueous phases at relatively mild temperature of 80 degrees C. The amount of each polyelectrolyte was systematically varied between 1 and 4 mM (monomolar based). The presence of PSS produced roughly cubic geometries at low concentrations, while nanothreads and nanosheets were produced at high concentrations. This was not so in the presence of equivalent amounts of PVP, where only fine cubes and nanobars were obtained. The shape and structure of all kinds of geometries were characterized by TEM, FESEM, EDX, and XRD analyses. All results demonstrated that the different preferential adsorption of polyelectrolyte PSS and neutral PVP for different crystal planes of the fcc geometry of PbS controlled the final morphology.

引用

页码：4948 / 4953

页数：6

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