2008 APS March Meeting
Volume 53, Number 2
Monday–Friday, March 10–14, 2008;
New Orleans, Louisiana
Session Q7: Undergraduate Nanotechnology and Materials Physics Education II
11:15 AM–2:15 PM,
Wednesday, March 12, 2008
Morial Convention Center
Chair: Peter Collings, Swarthmore College
Abstract ID: BAPS.2008.MAR.Q7.2
Abstract: Q7.00002 : What Quantum Dots Can Do for You
11:51 AM–12:27 PM
(University of Arkansas, Physics Department, Center for the Semiconductor Physics in Nanosctructures, Fayetteville, Arkansas 72701)
Recent clever techniques for fabricating nanosize materials,
one-atomic-layer-at-a-time, have simultaneously opened a door to a fantastic
adventure at the frontier of physics, chemistry, biology, and engineering.
Nanosize materials simply do not behave as the bulk. Indeed, the rules that
govern the growth and behavior of these tiny structures are unexplored. In
this talk we will discuss our recent efforts to be the architect of their
shape, size, density, and position of nanostructures and along the way, the
interactions between them that lead to their optical and electrical
While self-assembly is providing exciting quantum dot (QD) structures to
explore, like the QD molecules shown here, it is equally exciting to try to
use the rules we uncover to encourage QD formation to take a desired path.
Can we understand the formation of faceted nanostructures? Can we encourage
or seed dot structures to form specific arrays? Is it possible to engineer
greater homogeneity of dot shape and size? Can we design both the optical
and electrical behavior of either individual or arrays of nanostructures to
mimic those we find in nature? In this talk we will review our progress to
answer these questions and discuss the possibilities and challenges ahead.
For example, we will discuss the formation of individual faceted
nanostructures as well as the fabrication of a vertically and laterally
ordered QD stacks forming three-dimensional QD arrays.
As another example, we will discuss the importance of surfaces with high
Miller indices, as a template to the formation of nanostructures as well as
their potential role in determining the shape and increased size uniformity
of the confined structures. Importantly, these observations lead to an even
more basic question of when and why high index surfaces are stable. Indeed,
we have found that in order to understand the origin of high index surfaces
that bound nanostructures we have to study them directly.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.Q7.2