Surfactant-assisted reflux synthesis of PbS nanostructures and their properties

Journal of Materials Research volume 27, pages2916–2924(2012)Cite this article

Abstract

Uniform PbS nanostructures with varied morphology have been synthesized by a surfactant-assisted reflux route. ZnS and CdS layers were successfully coated onto PbS nanocrystals by encapsulation or epitaxial growth. The nanocrystals were characterized by x-ray diffraction, (high-resolution) transmission electron microscopy, selected area electron diffraction, and scanning electron microscopy. The truncated cubic nanostructures displayed a symmetric emission band at about 860 nm. Diffuse reflectance infrared (IR) spectroscopy was measured to estimate the band gap. High temperature and high frequency measurements of impedance and permittivity taught that the samples were stable and showed collateral evidence of the existence of epitaxial layers. Measurements illustrate that the luminescent properties of semiconductor PbS nanostructures are closely related to their surface nature, and encapsulation can affect their electrical properties and photoluminescence performance greatly. The study may prove useful in developing high frequency IR sensors and light signal amplification devices.

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ACKNOWLEDGMENTS

This work was supported by projects from National Science Foundation of China (Grant No. 50972081), the Chinese PLA Medical Science and Technique Foundation (Grant No. CWS11J243), Independent Innovation Foundation of Shandong University (Grant No. IIFSDU 2011JC024), and the 111 Project (Grant No. B06017).

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Affiliations

  1. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People’s Republic of China

    Haifeng Zhou, Guangjun Zhou & Qingqing Du

  2. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China

    Huifang Bi

  3. Center for Disease Prevention and Control of Jinan Military Command, Jinan, 250014, People’s Republic of China

    Juan Zhou

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  1. Haifeng Zhou
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  2. Guangjun Zhou
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  3. Qingqing Du
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  4. Huifang Bi
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Correspondence to Guangjun Zhou.

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Zhou, H., Zhou, G., Du, Q. et al. Surfactant-assisted reflux synthesis of PbS nanostructures and their properties. Journal of Materials Research 27, 2916–2924 (2012). https://doi.org/10.1557/jmr.2012.339

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