Reduction in buckling of deposited thin film on PDMS elastomer by engineering the substrate topology

Manocha, Puneet; Maji, Debashis; Das, Soumen

doi:10.1109/icsmb.2010.5735356

Cited by 1 publication

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To produce robust conductive stamps, cyclo-olefin-copolymer (COC, TOPAS 8007, Advanced Polymers) is proposed as an alternative of the commonly used polydimethylsiloxane (PDMS). Indeed, depending on the metalization methods, gold films deposited on PDMS can show surface deformations, − lack of adhesion, − or loss of electrical conduction. , Especially in the case of patterns larger than 100 μm, submicron wrinkles (see Figure S1) appear on the PDMS surface, either in or out of the defined patterns, due to stress relaxation. When applied to e-μCP nanoxerography, these wrinkles prevent the stamp surface and the substrate from having an intimate contact between each other, which reduces the assembly density.…”

Section: Resultsmentioning

confidence: 99%

Smartphone-Identifiable Photoluminescent Nanoparticle-Based Multilevel Secured Tags by Electrical Microcontact Printing

Poirot

Platel

Alnasser

et al. 2018

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

To fight the boom in counterfeiting and especially the fraud of official documents, we propose herein original multilevel integrated security features: photoluminescent nanoparticle-based tags (PL tags). Using the electrical microcontact printing technique, PL tags are fabricated at large scale and are successfully integrated in the production line of plastic cards. We introduce COC-based stamps in the fabrication process to meet industrial constraints in terms of speed, cost and robustness. Depending on the resolution of security features, from several millimeters down to several micrometers, PL tags can also combine several degrees of reading and so security. Indeed, using a simple blue LED, they could be quickly identifiable by naked eye or a simple smartphone camera. In addition, they could also embed smaller features only readable with an optical microscope.

show abstract