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Article

Simple Cubic Super Crystals Containing PbTe Nanocubes and Their Core−Shell Building Blocks

Supporting Info

Jun Zhang^†, Amar Kumbhar^‡, Jibao He^§, Narayan Chandra Das, Kaikun Yang, Jian-Qing Wang, Howard Wang, Kevin L. Stokes^# and Jiye Fang*^†

Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, Electron Microscope Facility, Clemson University, Anderson, South Carolina 29625, Coordinated Instrumentation Facility, Tulane University, New Orleans, Louisiana 70118, Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, New York 13902, Department of Physics, State University of New York at Binghamton, Binghamton, New York 13902, and Department of Physics, University of New Orleans, New Orleans, Louisiana 70148

J. Am. Chem. Soc., 2008, 130 (45), pp 15203–15209

DOI: 10.1021/ja806120w

Publication Date (Web): October 21, 2008

†

Department of Chemistry, State University of New York at Binghamton.

‡

Clemson University. Present address: CHANL Instrumentation Facility, Institute for Advanced Materials, NanoScience and Technology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3216.

Tulane University.

Department of Mechanical Engineering, State University of New York at Binghamton.

Department of Physics, State University of New York at Binghamton.

University of New Orleans.

Abstract

We report a preparation of high-quality cubic PbTe nanocrystals and their assembly into both square-array, two-dimensional patterns and three-dimensional simple cubic super crystals. The influence of oleylamine in the nanocrystal synthesis and core−shell formation through an anion-exchange mechanism was also studied. The simple cubic super crystals together with two-dimensional assembly patterns containing PbTe nanocubes and their core−shell building blocks were examined using TEM, SEM, AFM, XRD, SAXS, and FTIR. Such super crystals consisting of cubic structural building blocks may allow engineering of more complex materials from which novel properties may emerge.

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