Synthesis of silver nanoplates with a narrow LSPR band for chemical sensing through a plasmon-mediated process using photochemical seeds

Cc, Huang; Chen, Hongjun; Leong, Qi Lun; Lai, Wai Kit; Hsu, Chen-Yu; Chen, Jui‐Chang; Huang, Cheng‐Liang

doi:10.1016/j.mtla.2021.101279

Cited by 7 publications

(3 citation statements)

References 59 publications

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“…The steps used for the synthesis of silver nanoplates followed the procedure that was previously reported [ 22 ]. In brief, the synthesis of AgNPts begins with the same protocol as the preparation of quasi-spherical AgNPs.…”

Section: Methodsmentioning

confidence: 99%

Shape Dependence of Silver-Nanoparticle-Mediated Synthesis of Gold Nanoclusters with Small Molecules as Capping Ligands

Chang

Tseng

et al. 2023

Nanomaterials

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In this study, differently shaped silver nanoparticles used for the synthesis of gold nanoclusters with small capping ligands were demonstrated. Silver nanoparticles provide a reaction platform that plays dual roles in the formation of Au NCs. One is to reduce gold ions and the other is to attract capping ligands to the surface of nanoparticles. The binding of capping ligands to the AgNP surface creates a restricted space on the surface while gold ions are being reduced by the particles. Four different shapes of AgNPs were prepared and used to examine whether or not this approach is dependent on the morphology of AgNPs. Quasi-spherical AgNPs and silver nanoplates showed excellent results when they were used to synthesize Au NCs. Spherical AgNPs and triangular nanoplates exhibited limited synthesis of Au NCs. TEM images demonstrated that Au NCs were transiently assembled on the surface of silver nanoparticles in the method. The formation of Au NCs was observed on the whole surface of the QS-AgNPs if the synthesis of Au NCs was mediated by QS-AgNPs. In contrast, formation of Au NCs was only observed on the edges and corners of AgNPts if the synthesis of Au NCs was mediated by AgNPts. All of the synthesized Au NCs emitted bright red fluorescence under UV-box irradiation. The synthesized Au NCs displayed similar fluorescent properties, including quantum yields and excitation and emission wavelengths.

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Section: Methodsmentioning

confidence: 99%

Shape Dependence of Silver-Nanoparticle-Mediated Synthesis of Gold Nanoclusters with Small Molecules as Capping Ligands

Chang

Tseng

et al. 2023

Nanomaterials

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“…Significantly, assisted with the flow reactors, the conversion of seeds to nanodecahedra or nanoplates is close to 100% (within 80 min), saving the reaction time ≈80% compared to other methods. [24,25] Moreover, Ag nanocrystals including nanodecahedra (l = 16 ± 4 nm) and nanoplates (l = 20-50 nm) were obtained with white LED irradiation, giving rise to absorption bands at ≈466 and ≈615 nm. Notably, under 𝜆 ex of 640 nm, we only obtained pseudo-spherical Ag nanocrystals with a narrower absorption band (𝜆 ≈ 400 nm), in contrast to the previous report that Ag platelets can be yielded under 627 nm LED irradiation [23] (Figure 1d,e).…”

Section: Photo-mediated Synthesis Of Ag Nanocrystals In Flow Reactorsmentioning

confidence: 99%

Photo‐Mediated Cascade Growth of Ag Nanocrystals in Flow Reactors for High‐Performance Flexible Transparent Electrodes

Zeng,

Ding,

Yuan

et al. 2023

Adv Funct Materials

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Photo‐mediated synthesis wielding localized surface plasmon resonance (LSPR) of nanoscale metal is widely applied to sculpt silver (Ag) nanocrystals with controllable dimensions and morphologies. However, this photo‐mediated strategy remains underutilized owing to low efficiency and inferior quality in conventional batch reactors. Here, the effective synthesis of Ag nanocrystals is demonstrated via flow reactors and elucidates the photo‐mediated anisotropic growth mechanism. The investigation reveals that the intersection between excitation wavelengths and LSPR of Ag nanocrystals is a prerequisite for their growth. The final morphology is highly correlated with excitation wavelengths, which modulate the redox potential (reaction barrier) of Ag nanocrystals featuring distinct defective structures. Thus, by utilizing tandem‐connected flow reactors, size‐controllable Ag nanoplates can be yielded in a highly efficient cascade growth manner. In addition, composite conductive ink (submicron/nano‐Ag particles) is employed to create high‐performance flexible transparent electrodes. A sixfold conductivity enhancement especially under low sintering temperature (<80 °C), along with superior transmittance (over 90%), and distinguished cyclic durability (negligible resistance change over 1000 cycles) are achieved simultaneously. The study not only establishes comprehensive insights into the acquisition of well‐defined Ag nanocrystals in flow reactors but also ushers in enormous feasibility toward high‐performance and cost‐effective flexible electronics.

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“…Among these factors, shape-controlled synthesis has been proven to be one of the most effective methods for fine-tuning the optical properties and functions of metal nanostructures [ 23 , 24 , 25 ]. AgNPs with different shapes, such as rods [ 26 , 27 , 28 ], cubes [ 29 ], shells [ 30 ], tetrahedrons [ 31 ], triangular bipyramids [ 32 ], decahedra [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ], and prisms [ 42 , 43 , 44 , 45 ] have been synthesized.…”

Section: Introductionmentioning

confidence: 99%

Physical Properties and the Reconstruction of Unstable Decahedral Silver Nanoparticles Synthesized Using Plasmon-Mediated Photochemical Process

et al. 2022

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Plasmon-mediated shape transformation from quasi-spherical silver nanoparticles (AgNPs) to silver nanoprisms (AgNPrs) and decahedral silver nanoparticles (D-AgNPs) under irradiation of blue LEDs (λ = 456 ± 12 nm, 80 mW/cm2) was studied at temperatures ranging between 60, 40, 30, 20, 10, and 0 °C. It was found that reaction temperature affected transformation rates and influenced the morphology distribution of final products. The major products synthesized at temperatures between 60 °C and 0 °C were AgNPrs and D-AgNPs, respectively. The D-AgNPs synthesized at such low temperatures are unstable and become blunt when light irradiation is removed after the photochemical synthesis. These blunt nanoparticles with pentagonal multiple-twinned structures can be further used as the seeds to reconstruct complete D-AgNPs after irradiating blue LEDs at various bath temperatures. Our results showed that these rebuilt D-AgNPs are much more stable when at higher bath temperatures. Furthermore, the rebuilt D-AgNPs (edge lengths ~41 nm) can grow into larger D-AgNPs (edge lengths ~53 nm) after the irradiation of green LEDs. Surface-enhanced Raman spectra of CV in AgNP colloids showed that D-AgNP colloids have better SERS enhancements factors than AgNPrs.

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Synthesis of silver nanoplates with a narrow LSPR band for chemical sensing through a plasmon-mediated process using photochemical seeds

Cited by 7 publications

References 59 publications

Shape Dependence of Silver-Nanoparticle-Mediated Synthesis of Gold Nanoclusters with Small Molecules as Capping Ligands

Shape Dependence of Silver-Nanoparticle-Mediated Synthesis of Gold Nanoclusters with Small Molecules as Capping Ligands

Photo‐Mediated Cascade Growth of Ag Nanocrystals in Flow Reactors for High‐Performance Flexible Transparent Electrodes

Physical Properties and the Reconstruction of Unstable Decahedral Silver Nanoparticles Synthesized Using Plasmon-Mediated Photochemical Process

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