Resonant light absorption and plasmon tunability of lateral triangular Au nanoprisms array

Gao, Mengyao; Zheng, Xiang; Khan, Imran; Cai, Hong; Lan, Jinshen; Liu, Jing; Wang, Jiayuan; Wu, Jianyang; Huang, Shengli; Li, Shuping; Kang, Junyong

doi:10.1016/j.physleta.2019.125881

Cited by 14 publications

(8 citation statements)

References 34 publications

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“…35 In addition, triangular gold nanoplates (TAuNPs) have been demonstrated to have extremely high anisotropy and excellent LSPR properties, 39,54 which are highly useful for the SERS enhancement owing to the lightning-rod effect generated at the tip. 40,41 TAuNPs are typically synthesized by seed growth; however, this method is time-intensive and requires post-processing steps such as purification. The formation of nanoplates can reportedly be promoted by the selective adsorption of iodide ions on the Au(111) plane, and monodisperse TAuNPs have been generated by oxidative etching.…”

Section: Introductionmentioning

confidence: 99%

Triangular gold nanoplates/two-dimensional nano mica platelets with a 3D lightning-rod effect as flexible nanohybrid substrates for SERS bacterial detection

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Triangular gold nanoplates/two-dimensional nano mica platelets with a 3D lightning-rod effect as flexible nanohybrid substrates for SERS bacterial detection

et al. 2022

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“…The highest FOM value generated at the hexagonal Au NPLs overgrown in the early stage, and both RI sensitivity and FOM value decrease with increasing volumes of the HAuCl 4 solution. The FOM value of Au NPLs is much larger than those of Au nanospheres, nanocubes, nanobranches, and nanorods, which is because Au NPLs show sharp tips or edges and large contact surface area with the surrounding medium. − Therefore, Au NPLs should be more advantageous than other Au nanostructures when nanoparticle ensembles are employed for plasmonic sensing.…”

Section: Results and Discussionmentioning

confidence: 99%

Shape- and Size-Dependent Refractive Index Sensing and SERS Performance of Gold Nanoplates

et al. 2022

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Plasmonic sensors are promising for ultrasensitive chemical and biological analysis. Gold nanoplates (Au NPLs) show unique geometrical structures with high ratios of surface to bulk atoms, which display fascinating plasmonic properties but require optimization. This study presented a systematic investigation of the influence of different parameters (shape, aspect ratio, and resonance mode) on localized surface plasmon resonance properties, refractive index (RI, n) sensitivities, and surface-enhanced Raman scattering (SERS) enhancement ability of different types of Au NPLs through finite-difference time-domain (FDTD) simulations. As a proof of concept, triangular, circular, and hexagonal Au NPLs with varying aspect ratios were fabricated via a three-step seed-mediated growth method by the experiment. Both FDTDsimulated and measured experimental results confirm that the RI sensitivities increase with the aspect ratio. Furthermore, choosing a lower order resonance mode of Au NPLs benefits higher RI sensitivities. The SERS enhancement abilities of Au NPLs also predicted to be highly dependent on the shape and aspect ratio. The triangular Au NPLs showed the highest SERS enhancement ability, while it drastically decreased for circular Au NPLs after the rounding process. The SERS enhancement ability gradually became more intense as the hexagonal Au NPLs overgrown on circular Au NPLs with increasing volumes of HAuCl 4 solution. The results are expected to help develop effective biosensors.

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“…Moreover, for example, it was successfully demonstrated in [ 12 ] that ab initio molecular dynamics simulation approaches can be used to calculate the parameters of 2D graphitic-like aluminum nitride materials. Finite element modeling is another possible option for evaluating the optical properties of such complex three-dimensional systems, which is most widely used to estimate the effects of plasmonic amplification [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Polarization Sensitive Photodetectors Based on Two-Dimensional WSe2

2022

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In this work we show the possibility of imparting polarization-sensitive properties to two-dimensional films of graphene-like semiconductors, using WSe2 as an example, by the application of ordered silver triangular nanoprisms. In addition, such nanoprisms made it possible to increase the optical sensitivity of optical detectors created on two-dimensional films by a factor of five due to surface plasmon resonance. The peculiarities of the surface plasmon resonance were shown by theoretical modeling, and the optimal conditions of its occurrence were determined. This article demonstrates an effective approach to creating spectrally selective, polarization-sensitive detectors based on two-dimensional graphene-like semiconductors.

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Resonant light absorption and plasmon tunability of lateral triangular Au nanoprisms array

Cited by 14 publications

References 34 publications

Triangular gold nanoplates/two-dimensional nano mica platelets with a 3D lightning-rod effect as flexible nanohybrid substrates for SERS bacterial detection

Triangular gold nanoplates/two-dimensional nano mica platelets with a 3D lightning-rod effect as flexible nanohybrid substrates for SERS bacterial detection

Shape- and Size-Dependent Refractive Index Sensing and SERS Performance of Gold Nanoplates

Polarization Sensitive Photodetectors Based on Two-Dimensional WSe2

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