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2D freestanding Janus gold nanocrystal superlattices
File | Description | Size | Format | |
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2D_Janus_Paper_Copy.pdf | Accepted version | 1.54 MB | Adobe PDF | View/Open |
Title: | 2D freestanding Janus gold nanocrystal superlattices |
Authors: | Shi, Q Gomez, DE Dong, D Sikdar, D Fu, R Liu, Y Zhao, Y Smilgies, D-M Cheng, W |
Item Type: | Journal Article |
Abstract: | 2D freestanding nanocrystal superlattices represent a new class of advanced metamaterials in that they can integrate mechanical flexibility with novel optical, electrical, plasmonic, and magnetic properties into one multifunctional system. The freestanding 2D superlattices reported to date are typically constructed from symmetrical constituent building blocks, which have identical structural and functional properties on both sides. Here, a general ligand symmetry‐breaking strategy is reported to grow 2D Janus gold nanocrystal superlattice sheets with nanocube morphology on one side yet with nanostar on the opposite side. Such asymmetric metallic structures lead to distinct wetting and optical properties as well as surface‐enhanced Raman scattering (SERS) effects. In particular, the SERS enhancement of the nanocube side is about 20‐fold of that of the nanostar side, likely due to the combined “hot spot + lightening‐rod” effects. This is nearly 700‐fold of SERS enhancement as compared with the symmetric nanocube superlattices without Janus structures. |
Issue Date: | 12-Jul-2019 |
Date of Acceptance: | 1-May-2019 |
URI: | http://hdl.handle.net/10044/1/87996 |
DOI: | 10.1002/adma.201900989 |
ISSN: | 0935-9648 |
Publisher: | Wiley |
Start Page: | 1 |
End Page: | 6 |
Journal / Book Title: | Advanced Materials |
Volume: | 31 |
Issue: | 28 |
Copyright Statement: | © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: Shi, Q., Gómez, D. E., Dong, D., Sikdar, D., Fu, R., Liu, Y., Zhao, Y., Smilgies, D.‐M., Cheng, W., 2D Freestanding Janus Gold Nanocrystal Superlattices. Adv. Mater. 2019, 31, 1900989, which has been published in final form at https://doi.org/10.1002/adma.201900989 |
Keywords: | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics freestanding Janus plasmonic self-assembly superlattices ENHANCED RAMAN-SCATTERING PLASMENE NANOSHEETS EXCITATION WAVELENGTH PARTICLES SUPRAPARTICLES ARRAYS Janus freestanding plasmonic self-assembly superlattices Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics freestanding Janus plasmonic self-assembly superlattices ENHANCED RAMAN-SCATTERING PLASMENE NANOSHEETS EXCITATION WAVELENGTH PARTICLES SUPRAPARTICLES ARRAYS 02 Physical Sciences 03 Chemical Sciences 09 Engineering Nanoscience & Nanotechnology |
Publication Status: | Published |
Article Number: | ARTN 1900989 |
Online Publication Date: | 2019-05-09 |
Appears in Collections: | Chemistry |