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Proceedings Paper

Self-assembly of nanoscale building blocks: an in situ study
Author(s): Xiao-Min Lin; Suresh Narayanan; Xuefa Li; Jin Wang
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Paper Abstract

Building blocks with a nanoscale dimension (typically <100nm) have different properties compared with their bulk counterparts. For instance, the absorption and photoluminescence of semiconductor quantum dots show a strong size dependence [1, 2]. Charge injection onto a single quantum dot has to overcome a strong Coulomb charging energy. The magnetic moment of the surface atoms are strongly enhanced due to unquenched orbital moments in transition metal clusters [3]. Fundamentally, all these new phenomena can be attributed to two major effects on the nanometer scale, namely the quantum confinement of charge and spin [4] and the low coordination of surface atoms [5]. Development in colloidal chemistry during the past two decades has produced a variety of high quality nanoscale building blocks with many unique properties [6-10]. Although it is possible to study and utilize the physical properties of nanoparticles on a single particle level, it remains to be a technically challenging task. On the other hand, experiments on macroscopic 2D and 3D nanocrystal superlattices are more accessible. Self-assembly of nanocrystal building blocks not only provides a way to connect the nanoscale dimension to the macroscopic length scale, but it also creates a revolutionary new class of materials. New collective behavior is expected to emerge because of the strong coupling between building blocks [11, 12].

Paper Details

Date Published: 18 August 2005
PDF: 6 pages
Proc. SPIE 5929, Physical Chemistry of Interfaces and Nanomaterials IV, 59290E (18 August 2005); doi: 10.1117/12.618806
Show Author Affiliations
Xiao-Min Lin, Argonne National Lab. (United States)
Suresh Narayanan, Argonne National Lab. (United States)
Xuefa Li, Argonne National Lab. (United States)
Jin Wang, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 5929:
Physical Chemistry of Interfaces and Nanomaterials IV
Clemens Burda; Randy J. Ellingson, Editor(s)

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