Synthesis of Long Silver Nanowires from AgBr Nanocrystals

Liu, S.; Yue, Jun; Gedanken, Aharon

doi:10.1002/1521-4095(200105)13:9<656::aid-adma656>3.0.co;2-o

Cited by 148 publications

(12 citation statements)

References 9 publications

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“…The AgBr bands are gray in color due to photochemical decomposition of AgBr to Ag 0 as shown in the following reaction: 2AgBr → h ν 2Ag 0 + Br 2 . 38 Figure 1b–d shows the interband distance and a new parameter defined as U = (Δ x + W )/2 where Δ x is the interband distance and W is the band width, plotted against the number of rings showing a decreasing trend confirming revert periodic precipitation. 22 However, it should be noted that the confirmation of revert banding based on U and Δ x values may be erroneous as determination of the exact band width is often difficult due to diffused band boundaries.…”

Section: Resultsmentioning

confidence: 99%

“…The concentrations of the inner electrolyte (KBr) and the gel were 0.01 M and 1.00% w/v, respectively. The AgBr bands are gray in color due to photochemical decomposition of AgBr to Ag 0 as shown in the following reaction: 2AgBr → h ν 2Ag 0 + Br 2 Figure b–d shows the interband distance and a new parameter defined as U = (Δ x + W )/2 where Δ x is the interband distance and W is the band width, plotted against the number of rings showing a decreasing trend confirming revert periodic precipitation .…”

Section: Resultsmentioning

confidence: 99%

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Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel

et al. 2019

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A periodically precipitating system wherein interband distance successively decreases is known as revert Liesegang banding. The phenomenon is rare, and the underlying mechanism is implicit. In the present paper, the Liesegang system comprising of AgNO 3 and KBr as the outer and inner electrolyte pair showing revert banding in agar gel by employing a 1D experimental setup is studied under varying concentrations of participating species. Revert banding was observed under all the experimental conditions. The concentrations of inner and outer electrolytes were found to play a major role in reverting since they build the ionic strength inside Liesegang tubes. We hypothesize that the band reverting is the interplay of van der Waals and electrical double-layer interactions, and hence classical DLVO (Derjaguin–Landau–Verwey–Overbeek) theory can be applied to interpret reverting. We propose that revert deposition of precipitates is the outcome of flocculation and peptization of sols, which is the manifestation of balancing attractive and repulsive interactions acting on colloidal particles responsible for band formation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel

et al. 2019

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“…However, the decrease in diameter observed by Li et al upon Br – addition was believed to be caused by an increase in the number of nucleation events, with a smaller contribution from slower reduction kinetics. This increase in nucleation events was attributed to the formation of a silver halide nanoparticle precipitate, which has been demonstrated to be an effective agent for heterogeneous nucleation of Ag NWs (Figure d). , …”

Section: Metal Nanocrystalsmentioning

confidence: 89%

The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals

2018

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Over the years, scientists have identified various synthetic “handles” while developing wet chemical protocols for achieving a high level of shape and compositional complexity in colloidal nanomaterials. Halide ions have emerged as one such handle which serve as important surface active species that regulate nanocrystal (NC) growth and concomitant physicochemical properties. Halide ions affect the NC growth kinetics through several means, including selective binding on crystal facets, complexation with the precursors, and oxidative etching. On the other hand, their presence on the surfaces of semiconducting NCs stimulates interesting changes in the intrinsic electronic structure and interparticle communication in the NC solids eventually assembled from them. Then again, halide ions also induce optoelectronic tunability in NCs where they form part of the core, through sheer composition variation. In this review, we describe these roles of halide ions in the growth of nanostructures and the physical changes introduced by them and thereafter demonstrate the commonality of these effects across different classes of nanomaterials.

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“…Addition of NaBr also increased the number of AgBr nanoparticles formed in solution by a factor of 12. The AgBr nanoparticles can act as seeds for the growth of AgNWs. , Thus, the 13-fold increase in the number of NWs (which resulted in a 13- and 3.6-fold decrease in the average NW volume and diameter, respectively) could be attributed to the 12-fold increase in the number of AgBr nanoparticles that formed in the presence of NaBr. The reduction in NW diameter allowed the NW film to achieve a transmittance of 99.1% at a sheet resistance of 130 Ω/sq …”

Section: Applicationsmentioning

confidence: 99%

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

et al. 2019

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This Review offers a comprehensive review of the colloidal synthesis, mechanistic understanding, physicochemical properties, and applications of onedimensional (1D) metal nanostructures. After a brief introduction to the different types of 1D nanostructures, we discuss major concepts and methods typically involved in a colloidal synthesis of 1D metal nanostructures, as well as the current mechanistic understanding of how the nanostructures are formed. We then highlight how experimental studies and computational simulations have expanded our knowledge of how and why 1D metal nanostructures grow. Following specific examples of syntheses for monometallic, multimetallic, and heterostructured systems, we showcase how the unique structure− property relationships of 1D metal nanostructures have enabled a broad spectrum of applications, including sensing, imaging, plasmonics, photonics, display, thermal management, and catalysis. Throughout our discussion, we also offer perspectives with regard to the future directions of development for this class of nanomaterials.

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Synthesis of Long Silver Nanowires from AgBr Nanocrystals

Cited by 148 publications

References 9 publications

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel

The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

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Synthesis of Long Silver Nanowires from AgBr Nanocrystals

Cited by 148 publications

References 9 publications

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO3 + KBr) System in Agar Gel

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO3 + KBr) System in Agar Gel

The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals

One-Dimensional Metal Nanostructures: From Colloidal Syntheses to Applications

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Product

Resources

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Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel

Revert Banding in One-Dimensional Periodic Precipitation of the (AgNO₃ + KBr) System in Agar Gel