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OUR TECHNOLOGY

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3D CROSS-POINT PLASMONIC NANOARCHITECTURES CONTAINING DENSE AND REGULAR HOT SPOTS FOR SURFACE-ENHANCED RAMAN SPECTROSCOPY ANALYSIS

3D stacking of plasmonic nanostructures is achieved using a solvent‐assisted nanotransfer printing (S‐nTP) technique to provide extremely dense and regular hot spot arrays for highly sensitive surface‐enhanced Raman spectroscopy (SERS) analysis. Moreover, hybrid plasmonic nanostructures obtained by printing the nanowires on a continuous metal film or graphene surface show significantly intensified SERS signals due to vertical plasmonic coupling.

DOI: 10.1002/adma.201602603

HIGH-RESOLUTION NANOTRANSFER PRINTING APPLICABLE TO DIVERSE SURFACES VIA INTERFACE-TARGETED ADHESION SWITCHING

​Nanotransfer printing technology offers outstanding simplicity and throughput in emerging devices. Nevertheless, the development of a sub-50 nm process for large-area has been hindered by fundamental reliability issues. Here we present a solvent-assisted nanotransfer printing technique based on high-fidelity replication of sub-20 nm patterns using a dual-functional bilayer polymer thin film. For uniform and fast release of nanostructures, interface-specific adhesion control is realized by employing a polydimethylsiloxane gel pad as a solvent-emitting transfer medium, providing unusual printing capability even on biological surfaces. Based on this principle, we also demonstrate reliable printing of metallic nanostructures for surface-enhanced Raman spectroscopy analyses and hydrogen detection sensors.

DOI: 10.1038/ncomms6387