2D freestanding Janus gold nanocrystal superlattices
File(s)
Accepted version
Author(s)
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.
Date Issued
2019-07-12
Date Acceptance
2019-05-01
Citation
Advanced Materials, 2019, 31 (28), pp.1-6
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
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000477972300014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
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
Publication Status
Published
Article Number
ARTN 1900989
Date Publish Online
2019-05-09