Surface-Plasmon-Mediated Programmable Optical Nanofabrication of an Oriented Silver Nanoplate

Xu, Binbin; Wang, Lei; Ma, Zhenqiang; Zhang, Ran; Chen, Qi‐Dai; Lv, Chao; Han, Bing; Xiao, Xin-Ze; Zhang, Xu‐Lin; Zhang, Yong‐Lai; Ueno, Kosei; Misawa, Hiroaki; Sun, Hong–Bo

doi:10.1021/nn5029345

Cited by 50 publications

(37 citation statements)

References 68 publications

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“…[3c] Unlike such process, we conclude the proposed mechanism of plasma‐catalysis reduction of metal cation as a “trapping” process, where reactions proceed during laser‐induced microexplosion. Generally, the reduction of silver nitrate is accepted as a multiphoton process . Much more external energy is required to exceed the chemical barriers to trigger the reduction reaction.…”

Section: Resultsmentioning

confidence: 99%

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

Peng

Jiang

et al. 2019

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LSPR), have attracted numerous interests in the fields of plasmon-enhanced spectroscopies, [1] imaging, [2] chemical transformations, [3] and solar energy conversion. [3c,d] Notably, the enhancedelectromagnetic field ("hot spots") near plasmonic surfaces because of strong plasmon resonance coupling fully benefits to magnify the cross-section of surface-enhanced Raman spectroscopy (SERS) [1b,c,4] and extended applications. [5] During these years, cited methods for synthesizing plasmonic nanostructures, such as chemical synthesis, [6] photoreduction, [7] and electron beam lithography, [4d,8] have been developed to facilitate their applications. Whereas the residual photoinitiators and reducing agents on plasmonic surfaces are always unexpected in biomedical analysis and redox reaction proceeding. To this end, the exploration of high tunable and surfactant-free approaches in fabricating SERS-active nanostructures is still highly in demand.In recent two decades, laser ablation in liquid (LAL) has been intensively studied as a green, simple, and versatile method to synthesize functional nanomaterials with various compositions and morphologies. [9] Generally, two categories are typically adopted to synthesize plasmonic nanostructures: chemical bottom-up and physical top-down. [9c] Photochemical reduction of metal precursors features bottom-up approach to synthesize colloidal nanoparticles. [7a,b,9d,10] By photolyzing the metal complexes, [11] or by using the photosensitive regents or photochemically generated intermediates (e.g., hydrated electrons and radicals from water radiolysis), [7a,10] metal cations could be photoreduced to neutral atoms or clusters. The top-down method mainly depends on laser ablation of bulk into nanoparticle dispersions. [12] The main mechanisms are based on converting the laser energy into material plasma or vapor phases, and micro/nano droplets. And they subsequently quench and react with the surrounding mediums to form colloidal nanostructures. [9b,c,12b,13] From this technique, numerous newfangled nanostructures with excellent plasmonic properties have been successfully synthesized with LAL technique by selecting the appropriate solvents, ligands, and laser parameters, which exhibit huge potential in plasmonic science and technologies. [9a-d] Laser ablation in liquid has proven to be a universal and green method to synthesize nanocrystals and fabricate functional nanostructures. This study demonstrates the superiority of femtosecond laser-mediated plasma in enhancing photoredox of metal cations for controllable fabrication of plasmonic nanostructures in liquid. Through employing upstream high energetic plasma during laser-induced microexplosions, single/three-electron photoreduction of metallic cations can readily occur without chemical reductants or capping agents. Experimental evidences demonstrate that this process exhibits higher photon utilization efficiency in yield of colloidal metal nanoparticles than direct irradiation of metallic precursors. Photogenerated hydr...

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Section: Resultsmentioning

confidence: 99%

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

Peng

Jiang

et al. 2019

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“…Polarization effects are ubiquitous among earlier results on ablation, [ 29 ] nanoripple formation (including using relatively low NA = 0.1−0.25), [48][49][50] the growth of nanofl akes in solution, [ 25 ] and controlled melting of fi lms. [ 27 ] Elongation of fabricated features beyond the extent of the focal spot is clearly shown using short laser pulses.…”

Section: Communicationmentioning

confidence: 95%

“…[16][17][18] Polarization effects in laser fabrication in 2D and 3D geometries are now explored in polymerization by DLW. [19][20][21] In addition, stimulated-emission-depletion control of 3D focal volume, [22][23][24] orientation of the deposition of self-organized materials, [ 25,26 ] the melting and oxidation of thin fi lms, [ 27 ] laser ablation, [ 28,29 ] …”

Section: Doi: 101002/adom201600155mentioning

confidence: 99%

Nanoscale Precision of 3D Polymerization via Polarization Control

Rekštytė

Jonavičius

Gailevičius

et al. 2016

Advanced Optical Materials

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COMMUNICATIONand as self-organized nanopatterns induced on a surface, [ 30 ] are among other polarization-related phenomena demonstrated recently.The infl uence of beam polarization orientation on laser processing has been thoroughly studied in the cases of conductive and dielectric solid targets. [ 31,32 ] There are known effects of polarization on the scalar parameters of laser-matter interaction, such as absorption coeffi cient and ionization rate. [33][34][35][36] It is also known that heat conduction fl ux (vector) in plasma might be dependent on the direction of the imposed fi eld. [ 37 ] In what follows, these effects are considered in succession: (i) accumulation from multiple pulses, (ii) effects of polarization under high-numerical aperture (NA) focusing, and (iii) the infl uence of the external high-frequency electric fi eld on electronic heat conduction. The latter contribution has not yet been considered in laser fabrication under tight focusing. All these photomodifi cation mechanisms occur simultaneously and affect polymerization, which takes approximately a millisecond for common photoresists [ 38 ] at a >90% voxel overlap at typical writing velocity of 100 µm s -1 for widespread laser 3D nanolithography. [ 39 ] In this paper, a systematic analysis via modeling and experiments is presented in order to reveal polarization effects, their infl uence on the feature size (resolution), and the coupling between thermal gradient and polarization in DLW.To study and demonstrate the polarization effects, 3D suspended resolution bridges at various angles, α , between the linear polarization and scanning direction were fabricated on a glass substrate ( Figure 1 inset in (a); see details in the Experimental Section). The line-width difference was 10%-20% (varying exposure) under typical polymerization conditions for the linearly polarized pulses. The largest width of a 3D bridge was observed when the scan direction was perpendicular to the orientation of linear polarization, α = π / 2 ( E ⊥ v s ). The heightto-width ratio of the suspended lines was dependent on the orientation of linear polarization and changed between 3.07 and 3.44; self-focusing was not present under our experimental conditions. [ 40 ] Detailed analysis of polarization, threshold, and heat accumulation effects, which are all important, are discussed next.For the experimental conditions used, the focal spot diameter (at 1/ e 2 ) can be calculated as d f = 1.22 λ /NA = 898 nm assuming, for simplicity, a Gaussian intensity profi le. However, at such tight focusing it is necessary to use the vectorial Debye theory (specifi cs [ 41 ] can be found in Section A, Supporting Information), which predicts an ellipsoidal focal spot with two lateral cross sections: W l = 790 nm and W s = 572 nm for long and short cross sections, respectively (or 500 and 360 nm at full width at half maximum (FWHM)) for the actual experimental

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“…In this research, the femtosecond-laser mediated growth and assembly of photoreduced Ag NPs into nanoplates and micropatterns were revealed ( Figure 21, lower frame). 92 First, the photoreduction of silver ions in solution in the presence of ammonia and trisodium citrate occurs through the multi-photon absorption of a 800-nm laser to form Ag NPs. Then, the LSPR fields were excited and established on the Ag seeds (far left), launching directional growth along the dipole ends by attracting atoms that were photoreduced in solution (i).…”

Section: Plasmonic Hot-electron Transfer and Nanofabricationmentioning

confidence: 99%

“…Lower frame: Polarized femtosecond laser(λ = 800 nm, 120 fs)-mediated growth and programmable assembly of photoreduced silver nanoparticles into triply hierarchical micropatterns (thickness~30 nm): (i) the excited surface plasmons enhance the local electric field and lead to spatially selective growth of silver atoms at the opposite ends of dipoles induced on early created silver seeds; (ii, iii) the optical attractive force overcomes electrostatic repulsion in the enhanced local electric field to assemble the silver nanoparticles directly. Reprinted with permission from Xu et al 92 (Copyright 2014, American Chemical Society).…”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

2017

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Localized surface plasmon resonance (LSPR) of plasmonic nanoparticles and nanostructures has attracted wide attention because the nanoparticles exhibit a strong near-field enhancement through interaction with visible light, enabling subwavelength optics and sensing at the single-molecule level. The extremely fast LSPR decays have raised doubts that such nanoparticles have use in photochemistry and energy storage. Recent studies have demonstrated the capability of such plasmonic systems in producing LSPR-induced hot electrons that are useful in energy conversion and storage when combined with electron-accepting semiconductors. Due to the femtosecond timescale, hot-electron transfer is under intense investigation to promote ongoing applications in photovoltaics and photocatalysis. Concurrently, hot-electron decay results in photothermal responses or plasmonic heating. Importantly, this heating has received renewed interest in photothermal manipulation, despite the developments in optical manipulation using optical forces to move and position nanoparticles and molecules guided by plasmonic nanostructures. To realize plasmonic heating-based manipulation, photothermally generated flows, such as thermophoresis, the Marangoni effect and thermal convection, are exploited. Plasmon-enhanced optical tweezers together with plasmon-induced heating show potential as an ultimate bottom-up method for fabricating nanomaterials. We review recent progress in two fascinating areas: solar energy conversion through interfacial electron transfer in gold-semiconductor composite materials and plasmon-induced nanofabrication.

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Surface-Plasmon-Mediated Programmable Optical Nanofabrication of an Oriented Silver Nanoplate

Cited by 50 publications

References 68 publications

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

Nanoscale Precision of 3D Polymerization via Polarization Control

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

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