ERIC Number: EJ1082446
Record Type: Journal
Publication Date: 2015-Nov
Abstractor: As Provided
Synthesis and Characterization of Quantum Dots: A Case Study Using PbS
Pan, Yi; Li, Yue Ru; Zhao, Yu; Akins, Daniel L.
Journal of Chemical Education, v92 n11 p1860-1865 Nov 2015
A research project for senior undergraduates of chemistry has been developed to introduce syntheses of a series of monodispersed semiconductor PbS quantum dots (QDs) and their characterization methodologies. In this paper, we report the preparation of monodispersed semiconductor PbS QDs with sizes smaller than the exciton Bohr radius using a simple, one-step process, and the characterization of the QDs using a range of instruments, including Fourier-transform infrared spectroscopy, transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and energy-dispersive X-ray spectroscopy. Our synthesis approach involves dissolving powdered sulfur (as the S precursor) in 1-tetradecene and adding PbCl[subscript 2] as the Pb precursor to the suspension as well as oleylamine as a capping ligand. The PbS QD project represents, we believe, an almost ideal opportunity to provide exposure of undergraduate students to nanotechnology research via syntheses and characterization of semiconductor nanoparticles.
Descriptors: Synthesis, Quantum Mechanics, Case Studies, Undergraduate Students, Chemistry, Scientific Methodology, Scientific Research, Scientific Concepts, Scientific Principles, Science Experiments, Science Activities, Spectroscopy, Molecular Structure, Teaching Methods
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: email@example.com; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
Identifiers - Location: New York
Grant or Contract Numbers: HRD0833180