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Title: Low temperature regulated growth of PbS quantum dots by wet chemical method

Narrow size distribution with regulated synthesis of lead sulfide (PbS) quantum dots (QDs) was achieved through wet chemical method. Different concentrations of 2-mercaptoethanol (capping agent) were used for tailoring the QDs size. Transmission electron microscopy and X-ray diffraction studies revealed that the QDs have mean diameters between 6 to 15 nm. The optical absorption spectra were compared to the predictions of a theoretical model for the electronic structure. The theory agrees well with experiment for QDs larger than 7 nm, but for smaller dots there is some deviation from the theoretical predictions. Consequently, the produced particles are having monodispersity, good water solubility, stability and may be good arguments to be biologically compatible due to the use of 2-mercaptoethanol.
Authors:
; ;  [1] ;  [2]
  1. Department of Physics and Materials Science, Jaypee University of Information Technology, Waknaghat, Solan-173234, H.P. (India)
  2. Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee 247667 (India)
Publication Date:
OSTI Identifier:
22488792
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1675; Journal Issue: 1; Conference: AMRP-2015: 4. national conference on advanced materials and radiation physics, Longowal (India), 13-14 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABUNDANCE; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; ELECTRONIC STRUCTURE; LEAD SULFIDES; PARTICLES; PHASE STABILITY; QUANTUM DOTS; SOLUBILITY; SYNTHESIS; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION