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Self-Assembly of PbTe Quantum Dots into Nanocrystal Superlattices and Glassy Films
Abstract
Monodisperse lead telluride (PbTe) nanocrystals ranging from approximately 4 to 10 nm in diameter are synthesized to provide quantum dot building blocks for the design of novel materials for electronic applications. Two complementary synthetic approaches are developed that enable either (1) isolation of small quantities of nanocrystals of many different sizes or (2) the production of up to 10 g of a single nanocrystal size. PbTe nanocrystals are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and optical absorption. Assembly of PbTe nanocrystals is directed to prepare nanocrystal solids that display either short-range (glassy solids) or long-range (superlattices) packing order by varying deposition conditions. Film order and average interparticle spacing are analyzed with grazing-incidence small-angle X-ray scattering (GISAXS) and high-resolution scanning electron microscopy (HRSEM). We perform the first optical and electronic studies of PbTe solids and demonstrate that chemical activation of these films enhances conductivity by approximately 9-10 orders of magnitude while preserving their quantum dot nature.
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Cites
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
Alivisatos, A. P. (1996) · The Journal of Physical Chemistry · doi:10.1021/jp9535506 · Cited by 3,595
Colloidal nanocrystal synthesis and the organic–inorganic interface
Yin, Y., & Alivisatos, A. P. (2005) · Nature · doi:10.1038/nature04165 · Cited by 3,273
Cited by
Lee, J.-S., Shevchenko, E. V., & Talapin, D. V. (2008) · Journal of the American Chemical Society · doi:10.1021/ja802890f · Cited by 349
Self-citationEmerging tellurium nanostructures: controllable synthesis and their applications
He, Z., Yang, Y., Liu, J.-W., & Yu, S.-H. (2017) · Chemical Society Reviews · doi:10.1039/c7cs00013h · Cited by 282
Surface Chemistry Mediates Thermal Transport in Three-Dimensional Nanocrystal Arrays
Ong, W.-L., Rupich, S. M., Talapin, D. V., McGaughey, A. J. H., & Malen, J. A. (2013) · Nature Materials · doi:10.1038/nmat3596 · Cited by 249
Self-citationSarkar, R., Farghaly, A. A., & Arachchige, I. U. (2022) · Chemistry of Materials · doi:10.1021/acs.chemmater.2c00717 · Cited by 38
Metadata
- Authors
- Urban, J. J., Talapin, D. V., Shevchenko, E. V., & Murray, C. B.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-02-14
- Volume
- 128
- Issue
- 10
- Pages
- 3248-3255
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2087440406
- Cited by
- 337
- References
- 2
- FWCI
- 14.54
- Type
- journal article
- Language
- en
- Open access
- closed
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