Self-assembly of Large-scale Two-dimensional Plasmonic Superlattices Based on Single-Crystal Au Nanospheres and the FDTD Simulation of Its Optical Properties
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Large-scale ordered two-dimensional (2D) superlattices at oil/water interface were fabricated using single-crystal Au nanospheres (NSs) with different diameters as building blocks. A “drain-to-deposit” strategy was used to successfully transfer the ordered superlattices onto silicon wafer. Due to the ultra-smooth and highly spherical morphology of the monodisperse Au NSs, the UV-Vis extinction spectra of individual Au nanosphere (NS) obtained from theoretical calculations by finite-difference time-domain (FDTD) method could match well with the experimental test results. Moreover, the extinction spectra of the 2D superlattice based on the different diameters of Au NSs were also measured and calculated. Additionally, with R6G as probe molecules, the surface-enhanced Raman spectroscopy (SERS) performances of the prepared superlattices were evaluated. Through investigating the electromagnetic (EM) field distribution simulation results of 2D superlattices of Au NSs with different diameters, the two results reveal rather consistently. The large-scale 2D plasmonic superlattices possess precise and tunable localized surface plasmon resonance (LSPR) property, which enables them to have great application prospect in solar cells, SERS detection, and other fields.
KeywordsSingle-crystal Au NSs 2D superlattices FDTD simulation SERS
XL and SL contributed equally to this work.
The work was supported by the National Natural Science Foundation of China (Grant No. 21501021) and the International S&T Cooperation Program of China (Grant no. 2011DFA31770).
- 7.Peng B, Li G, Li D, Dodson S, Zhang Q, Zhang J, Lee YH, Demir HV, Ling XY, Xiong Q (2013) Vertically aligned gold nanorod monolayer on arbitrary substrates: self-assembly and femtomolar detection of food contaminants. ACS Nano 7(7):5993–6000. https://doi.org/10.1021/nn401685p CrossRefPubMedGoogle Scholar
- 16.Lee YH, Shi WX, Lee HK, Jiang RB, Phang IY, Cui Y, Isa L, Yang YJ, Wang JF, Li SZ, Ling XY (2015) Nanoscale surface chemistry directs the tunable assembly of silver octahedra into three two-dimensional plasmonic superlattices. Nat Commun 6:6990. https://doi.org/10.1038/ncomms7990 CrossRefPubMedPubMedCentralGoogle Scholar
- 18.Liu D, Li CC, Zhou F, Zhang T, Liu GQ, Cai WP, Li Y (2017) Capillary gradient-induced self-assembly of periodic au spherical nanoparticle arrays on an ultralarge scale via a bisolvent system at air/water Interface. Adv Mater Interfaces 4(10):1600976. https://doi.org/10.1002/admi.201600976 CrossRefGoogle Scholar
- 25.Hill EH, Hanske C, Johnson A, Yate L, Jelitto H, Schneider GA, Liz-Marzan LM (2017) Metal nanoparticle growth within clay-polymer nacre-inspired materials for improved catalysis and plasmonic detection in complex biofluids. Langmuir 25(6):3887–3893. https://doi.org/10.1021/la803831c CrossRefGoogle Scholar
- 36.Lin L, Zapata M, Xiong M, Liu Z, Wang S, Xu H, Borisow AG, Gu H, Nordlander P, Aizpurua J, Ye J (2015) Nanooptics of plasmonic nanomatryoshkas: shrinking the size of a core-shell junction to subnanometer. Nano Lett 15(10):6419–6428. https://doi.org/10.1021/acs.nanolett.5b02931 CrossRefPubMedGoogle Scholar