Plasmon assisted two-photon direct laser writing of micro-structures composed of chiral Ag nanoparticles

Xavier Vidal*, Won Jin Kim, Alexander Baev, Hong Sub Jee, Valentyna Tokar, Mark T. Swihart, Paras N. Prasad

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

We present an approach to produce micropatterns of metallic nanoparticles (NPs) that preserve key optical properties of the individual NPs. The technique uses a photothermal reaction induced by two-photon direct laser writing. The studied NP property is plasmon chirality, which was obtained via chemical conjugation of Ag NPs with chiral ligands: N-(tertbutoxycarbonyl)-L-cysteine methyl ester. The ligand cleavage initiated by a femtosecond pulsed laser induced thermal reaction results in a significant change in dispersiblility of the nanocrystals, thereby enabling a solvent selective development process after photo-patterning. We analyzed the optical chirality of the Ag NP films before and after micropatterning by two-photon lithography. We show that this patterning technique allows the patterned film to maintain this predefined optical property. In contrast, we show the disadvantage of the common use of a photo-acid generator for the cleavage of solubilizing groups via protonation. In this case, the ligand protonation results in the loss of the chiral behavior.

Original languageEnglish
Title of host publicationTechnical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
Place of PublicationBoca Raton, FL
PublisherCRC Press, Taylor & Francis Group
Pages234-237
Number of pages4
Volume2
ISBN (Print)9781439871393
Publication statusPublished - 2011
Externally publishedYes
EventNanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011 - Boston, MA, United States
Duration: 13 Jun 201116 Jun 2011

Other

OtherNanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
CountryUnited States
CityBoston, MA
Period13/06/1116/06/11

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