Category:     ~ 5 title(s) found

Nanoscale Patterning and Synthesis Experiments
Contributed by Christina Sweeney on 26-OCT-07
Author(s) Yelizaveta Babayan, Meenakashi Viswanathan, Teri W. Odom

We have developed several simple nanoscale patterning techniques that can be incorporated into undergraduate laboratories. Unlike conventional nanopatterning techniques that involve expensive equipment and substrates, our experiments use compact discs (CDs) as nanoscale masters for soft lithography. These experiments can be performed on the benchtop and provide an opportunity for students to learn nanofabrication through soft lithographic techniques such as replica molding, capillary molding, an...

Optical Assembly of Micro and Nano Particles with Optical Tweezers
Contributed by Weiqiang Mu on 26-OCT-07
Author(s) Lan Luan, John Ketterson

Optical tweezers provide a powerful tool to manipulate microsize or nanosize particles. We made an interferece optical tweezers setup to trap many particles in the intensity maxima to form a lattice. And at the same time, we introduced a "helper" beam, which can be used to manipulate a single paritcle. We made different kinds of optical assemblied colloidal lattices based on our setup....

The effects of domain contextualization on learner outcomes within nanoscale self-assembly design experiences
Contributed by Thomas Moher on 23-MAY-07
Author(s) Emily Shipley & Tom Moher

In a one-week controlled quasi-experiment, two classes of urban sixth-grade students received instruction and participated in design activities (using the Molecular Workbench simulation environment) surrounding molecular self-assembly. One class received a contextualized treatment, with an introduction to domain terminology and concepts prior to design activities. The other class received a decontextualized treatment, in which domain language was introduced only after the design activities, whic...

Benchtop Nanoscale Patterning by Soft Lithography
Contributed by Yelizaveta Babayan on 01-MAR-07
Author(s) Meenakshi Viswanathan & Teri W. Odom

This poster describes several simple nanoscale patterning techniques that can be incorporated into undergraduate laboratories. Unlike conventional nanopatterning techniques that involve expensive equipment and substrates, our experiments use compact discs (CDs) as nanoscale masters for soft lithography. These experiments can be performed on the benchtop and provide an opportunity for students to learn nanofabrication through soft lithographic techniques such as replica molding, capillary molding...

Towards Optical Whispering Galleries
Contributed by Yelizaveta Babayan on 10-MAR-06
Author(s) Yelizaveta Babayan & Teri W. Odom

Objective: To manipulate and confine light within patterned structures for the investigation of an optical analog to the quantum corral and quantum mirage. These evanescent standing waves have potential applications in high sensitivity optical sensors and photonic computing. Methods: Ring and elliptical structures are generated using soft and e-beam lithography, respectively. Optically active materials such as semiconducting quantum dots and gold are used to fill the templates to generate the m...