Direct Writing of Metallic Nanoparticle Concentric Multi‐Ring Structures by Template‐Directed Convective Self‐Assembly Processes

Zhai, Shengjie; Jiang, Yingtao; Zhao, Hui; Das, Biswajit

doi:10.1002/adom.201400053

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…23 A large variety of colloidal self-assembly methodologies have been utilized for creating highly order colloidal crystals. [24][25][26][27][28][29][30][31] However, most of the current self-assembly technologies are only favorable for low-volume, laboratory-scale production. To resolve the scale-up and cost issues, a simple and roll-to-roll compatible doctor blade coatings (DBC) technology that enables the fabrication of self-standing threedimensional highly ordered macroporous membranes is proposed in this study and used as anti-UV coatings for application in DSSCs.…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic performance of a N719 dye based dye-sensitized solar cell with transparent macroporous anti-ultraviolet photonic crystal coatings

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Photovoltaic performance of a N719 dye based dye-sensitized solar cell with transparent macroporous anti-ultraviolet photonic crystal coatings

et al. 2015

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“…Notably, the Raman intensity exhibited a gradual decreasing trend from the central rings to the outer rings (linear relation R 2 = 0.9795) as evident in Figures c and S8. It can be attributed that the presence of the concentric rings induced the surface plasmons energy to concentrate toward the center of the rings, resulting in the enhancement of the local electric field strength in this region …”

Section: Resultsmentioning

confidence: 99%

“…It can be attributed that the presence of the concentric rings induced the surface plasmons energy to concentrate toward the center of the rings, resulting in the enhancement of the local electric field strength in this region. 51 Andrade et al indicated that the local electric field enhancement of the tightly arranged Au concentric rings exhibited a "butterfly-like" distribution, and the location of the enhancement region strongly relied on the direction of laser light polarized; moreover, the enhancement sites outside the region were caused by the defects on structure surfaces. 19 Polarization-independent electric field enhancement induced by surface defects was expected as a new mechanism for Raman enhancement of ordered plasmonic structures.…”

Section: Sers Detection On Au Concentric Ringsmentioning

confidence: 99%

Site-Controlled Preparation of Au Micro/Nanostructures Toward Enhancing Raman Scattering

Cui,

Liu,

Chen

et al. 2024

ACS Appl. Nano Mater.

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As a sensing method with single molecule-level resolution in theory, surface-enhanced Raman scattering (SERS) shows robust applications in wide fields. However, due to technical limitations, it remains challenging to obtain effective plasmonic architectures with both strong and uniform electric field hot spots. Herein, nanoscratch-induced orientational metal deposition was proposed for achieving the customizable preparation of Au plasmonic architectures on silicon (Si) for high-performance SERS detections. We found that the deposition can be significantly affected by mechanical crystal defects on Si surfaces. Based on Raman analysis and conductive atomic force microscope detections, the defects were demonstrated to change the conductivity on scratched areas. Compared with untreated scratches, conductive sites on amorphous Si-free scratches were significantly increased and distributed uniformly. Further analysis indicated that the increase in the conductivity can accelerate the redox reaction on the scratches, which facilitated the formation of compact Au structures, as confirmed by in situ scanning electron microscope characterizations. The as-prepared SERS substrates exhibited excellent detection sensitivity and reproducibility, and the anti-interference ability was demonstrated by detecting malachite green residues from different water environments. We also found that Au concentric rings with uniformly rough surfaces obtained by the proposed site-controlled deposition can focus polarization-independent electric field enhancement induced by surface defects on the whole structure surface. These findings can shed light on flexible preparation of highquality SERS substrates.

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“…Concentric multi‐ring structures compared to single‐ring structures have higher degrees of freedom and can generate hybridized plasmon resonances and focus surface plasmon excited at all azimuthal directions to the geometric center . Ring‐shaped close‐packed monolayers of metallic nanoparticles with micron scale widths and millimeter scale lengths can induce localized surface plasmon resonance and concentrate optical energy into hot spots near the gaps of nanoparticles, which can further enhance the optical field . The strongly enhanced nearly‐uniform evanescent optical field in the center possessed by concentric‐ring structures can serve as efficient substrates for surface enhanced Raman scattering (SERS) or plasmon enhanced fluorescence spectroscopy …”

Section: Introductionmentioning

confidence: 99%

Structuring of Surfaces with Gold Nanoparticles by Using Bessel‐Like Beams

et al. 2017

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Here, the structuring of surfaces with gold nanoparticles by using Bessel-like beam array is demonstrated. The experimental results show that the fabricated microring structures containing gold nanoparticles have a surface plasmon resonance in the spectral range of 520-540 nm, which can be tuned by selecting the laser treatment parameters. Fabricated microring structures exhibit a lower light transmittance comparing with the randomly distributed gold nanoparticles for wavelengths 500-570 nm due to the growth in the size of nanoparticles. In the spectral range of 600-700 nm, the light transmittance through microring structures is higher compared with the randomly distributed gold nanoparticles because of the removal of gold nanoparticles as gold has high reflectivity for wavelengths longer than 600 nm. The demonstrated method enables an easy fabrication of microring structures having tunable plasmonic properties.E. Stankevičius and M. Garliauskas acknowledge to the Lithuanian Research Council for the financial support of the joint Lithuanian-Belarus project in science and technology "Generation of nanoparticles by laserbased methods and formation of structures consisting of nanoparticles by laser" No. S-LB-

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Direct Writing of Metallic Nanoparticle Concentric Multi‐Ring Structures by Template‐Directed Convective Self‐Assembly Processes

Cited by 9 publications

References 36 publications

Photovoltaic performance of a N719 dye based dye-sensitized solar cell with transparent macroporous anti-ultraviolet photonic crystal coatings

Photovoltaic performance of a N719 dye based dye-sensitized solar cell with transparent macroporous anti-ultraviolet photonic crystal coatings

Site-Controlled Preparation of Au Micro/Nanostructures Toward Enhancing Raman Scattering

Structuring of Surfaces with Gold Nanoparticles by Using Bessel‐Like Beams

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