Synthesis of silver nanoplates with controlled shapes by reducing silver nitrate with poly(vinyl pyrrolidone) in N-methylpyrrolidone

Kim, Mun Ho; Lee, Jong-Jin; Lee, Jong-Bae; Choi, Kil‐Yeong

doi:10.1039/c3ce40096d

Cited by 34 publications

(17 citation statements)

References 65 publications

(8 reference statements)

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“…18% of the initially added Ag + ions had been reduced into Ag atoms. This result suggests that PVP has a milder reducing power in an aqueous solution than in ethanol, which is consistent with the findings described in previous reports . At 1.5 h, we observed a weak LSPR peak at 430 nm in the UV‐vis spectrum, indicating the formation of MTPs with relatively small sizes.…”

Section: Resultsmentioning

confidence: 99%

The Role of Etching in the Formation of Ag Nanoplates with Straight, Curved and Wavy Edges and Comparison of Their SERS Properties

Yang

Zhong

Zhang

et al. 2013

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We investigate the role of etching in the formation of Ag nanoplates with different morphologies. By examining the reduction of AgNO3 with poly(vinyl pyrrolidone) in an aqueous solution under a hydrothermal condition, we confirm that etching plays an essential role in promoting the growth of Ag triangular nanoplates with straight edges at the expense of multiple twinned particles via Ostwald ripening. Once all the multiple twinned particles are gone, etching will continue at the corners of nanoplates, leading to the formation of enneahedral nanoplates with curved edges. When the nanoplates with straight edges are transferred into ethanol and subjected to a solvothermal treatment, we obtain nanoplates with wavy edges and sharp corners due to etching on the edges. A comparison study indicates that, at the same particle concentration, Ag nanoplates with wavy edges embraces a SERS enhancement factor at least 6 and 13 times stronger than those with straight and curved edges, respectively. The results from finite difference time domain calculations support our experimental observation that the sharp features on nanoplates with wavy edges are the most active sites for SERS.

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Section: Resultsmentioning

confidence: 99%

The Role of Etching in the Formation of Ag Nanoplates with Straight, Curved and Wavy Edges and Comparison of Their SERS Properties

Yang

Zhong

Zhang

et al. 2013

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“…The synthetic protocol is described in detail in our recent publication. 13 The galvanic replacement reaction occurs immediately upon introduction of the aqueous HAuCl 4 to these Ag nanostructures. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…[9][10][11] We prepared a series of samples by adding various amounts of HAuCl 4 to very thin Ag nanoplates, produced by the procedure we published previously. 13 The average plate size was 255 nm, and the approximate thickness was 29 nm. SEM and TEM images of the sample are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we developed a new and facile method based on chemical reductions, from which thick hexagonal nanoplates with very high shape yield could be obtained. 13 Ag nanoplates are covered by {111} facets at both the top and bottom surfaces, and they contain twin planes and stacking faults on the side faces along the vertical direction. Each nanoplate edge consists of a {111} facet and a {100} facet of a different size.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of hex nut shaped Au–Ag nanostructures via a galvanic replacement reaction and their optical properties

Kim

Lee

et al. 2013

CrystEngComm

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“…Silver nanoplates exhibited an extreme degree of anisotropy in their shapes and special features in localised surface plasmon resonances properties [8][9][10]. They were potentially applied in the area of sensors, catalysis, bio-applications, anti-virus reagent, separation materials and so on [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Aggregation of silver nanoplates in the presence of L‐cysteine and the application for separation

Zhou

Chen

et al. 2018

IET nanobiotechnol.

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A facile method was investigated to fabricate the aggregated silver nanoplates as products for separation materials. Initially, ageing of L-cysteine capped silver nanoplates in ethanol solvent led to fast aggregation. Then, the as-formed aggregates were easily prepared as powder due to the highly volatile properties of ethanol. Interestingly, the aggregated powder would be soluble again after the dispersion in water and the re-dispersed nanoplates could be obtained. Furthermore, the heavy metal ions such as Cu, Pb and Hg would soon accelerate the aggregation of the dispersed silver nanoplates again. The reversible aggregation process could be employed for separation applications in the future.

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Synthesis of silver nanoplates with controlled shapes by reducing silver nitrate with poly(vinyl pyrrolidone) in N-methylpyrrolidone

Cited by 34 publications

References 65 publications

The Role of Etching in the Formation of Ag Nanoplates with Straight, Curved and Wavy Edges and Comparison of Their SERS Properties

The Role of Etching in the Formation of Ag Nanoplates with Straight, Curved and Wavy Edges and Comparison of Their SERS Properties

Synthesis of hex nut shaped Au–Ag nanostructures via a galvanic replacement reaction and their optical properties

Aggregation of silver nanoplates in the presence of L‐cysteine and the application for separation

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