Abstract by Dulashani R. Ranasinghe

Personal Infomation

Presenter's Name

Dulashani R. Ranasinghe

Degree Level



Basu R. Aryal
Tyler R. Westover
Sisi Jia
Robert C. Davis
John N. Harb
Rebecca Schulman
Adam T. Woolley

Abstract Infomation


Chemistry and Biochemistry

Faculty Advisor

Adam Woolley


Metal nanomaterial synthesis and placement on DNA nanotubes to make electrically conductive wires


Self-assembly aided nanostructure fabrication is increasingly appealing, as it requires fewer materials and has the potential to reduce feature sizes in making complex nanostructures. DNA, with its nanoscale dimensions, functional groups, and complementary base pairs, is a powerful template for making nanostructures via self-assembly. We use DNA nanotubes that have a hollow interior and variable length as templates. We metalize DNA nanotubes by using two different methods with the ultimate goal of creating long connections. One approach involves seeding DNA nanotubes with gold nanorods and connecting them by electroless plating. Another method utilizes Pd ionic seeding in a three-step process: Pd activation, Pd reduction to form seeds and electroless plating. We utilize electron beam induced deposition of conductive Pt contacts to study electrical properties with resolution <100 nm. Initial conductivity measurements revealed that the formed Au seeded and plated structures have ohmic character; the average resistance values for three structures were 59 kΩ, 84 kΩ and 98 kΩ, and more measurements are in progress.