Structural and Optical Properties of PbS Nanoparticles Synthesized by the Radiolytic Method

被引：57

作者：

Souici, A. H. ^{[1
,2
]}

Keghouche, N. ^{[1
]}

Delaire, J. A. ^{[3
]}

Remita, H. ^{[2
]}

Etcheberry, A. ^{[4
]}

Mostafavi, M. ^{[2
]}

机构：

[1] Univ Mentouri Constantine, Lab Microstruct & Defauts Mat, Constantine 25010, Algeria

[2] Univ Paris 11, CNRS, Chim Phys Lab, UMR UPS 8000, F-91405 Orsay, France

[3] CNRS, ENS Cachan, Lab Photophys & Photochim Supramol & Macromol, F-94235 Cachan, France

[4] Univ Versailles St Quentin Yvelines, Inst Lavoisier Versailles, CNRS, UMR 8180, F-78035 Versailles, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 19期

关键词：

SCANNING-TUNNELING-MICROSCOPY; LOW-DIMENSIONAL MATERIALS; QUANTUM DOTS; PULSE-RADIOLYSIS; SPECTROSCOPY; LUMINESCENT; NUCLEATION; GROWTH;

D O I：

10.1021/jp811133b

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 nanoparticles with diameter in the range of 9-45 nm were synthesized by the radiolytic method in aqueous solutions containing Pb2+ and thiol. PbS nanoparticles were identified by HRTEM, SAED, and XPS techniques. The irradiation dose plays a crucial role to control the size of the nanoparticles and consequently to modify their optical properties. These properties were studied by measuring the absorption and emission bands for each irradiation dose. For irradiation doses higher than 2 kGy, the PbS nanoparticles exhibit an emission band within the ultraviolet range (300-550 nm). This band shifts from 360 to 380 nm. The excitation of PbS nanoparticles shows that they display three emission bands in the near-infrared region around 900, 980, and 1100 nm. In addition, it is shown that the unusual emission bands of PbS nanoparticles are due to the presence of complexes of lead by thiol on the surface of the nanoparticles.

引用

页码：8050 / 8057

页数：8

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