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September 25, 2006

Nanotransfer Printed L-shaped Beams

Nanotransfer Printed L-shaped Beams

Scanning electron micrograph of nanotransfer-printed, L-shaped, 3 Dimensional beams made of gold layers, 20 nanometers thick, on Si wafers.

Nanotransfer printing (nTP) represents an effective approach for generating 2 and 3 Dimension structures with feature sizes between tens of nanometers and tens of microns over areas several square millimeters. This technique uses elastomeric poly(dimethylsiloxane) (PDMS) stamps with high-resolution relief features to print thin, solid layer of "inks" onto the surface of other substrates. When the adhesion between the "ink" layers and the surface of a substrate is stronger than the interaction between the PDMS stamps and the "ink" layers, the "inks" are transferred onto the substrates. This approach provides a versatile, convenient and cost-effective means to form nanostructures on various surfaces, including flat planes, curved walls and over large areas. [For details about this and related research, see J. Zaumseil, M. A. Meitl, J. W. P. Hsu, B. R. Acharya, K. W. Baldwin, Y. L. Loo and J. A. Rogers, Nano Lett. 3, 1223 (2003) and E. Menard, L. Bilhaut, J. Zaumseil and J. A. Rogers, Langmuir 20, 6871 (2004).] (Date of Image: 2004)

Credit: Dr. John A. Rogers, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign. These images are modified with permission of the American Chemical Society.

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