Silver nanostructures formation in porous Si/SiO2 matrix

Sivakov, Vladimir; Kaniukov, Egor; Петров, А. В.; Королик, О. В.; Mazanik, A.V.; Bochmann, A.; Teichert, S.; Hidi, Izabella J.; Schleusener, Alexander; Cialla, Dana; Toimil-Molares, María Eugenia; Trautmann, C.; Demyanov, S. E.

doi:10.1016/j.jcrysgro.2014.04.024

Cited by 32 publications

(20 citation statements)

References 57 publications

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“…The self-assembled silver nanostructures grew in template by ion track technology, and the template coated with active sites could support the formation of Ag nanoparticles. The self-assembled Ag dendrites formed in porous Si/SiO 2 matrix and SiO 2 nanoparticles didn't need any additional reagents during the reaction [55]. Factors that affect the Ag nanostructures formation in the templates include the structure of the template, presence of surface active agents, and the reaction conditions.…”

Section: Ag Dendrites Fabrication Via Template Methodsmentioning

confidence: 99%

“…Fu et al [65] fabricated Ag dendrites/AgCl hybrid thin film on ITO electrode with electrolyte consisting of silver-ammonia [Ag(NH 3 ) 2 OH] and certain amount of hexadecyl trimethyl ammonium chloride (CTAC). Investigation revealed that the Ag dendrites consisted of a long central stem with side branches emerge at about 55 and when using higher content of CTAC, the growth of Ag dendrites was suppressed while the numbers of polyhedral AgCl dramatically increased. Polyethylene glycol (PEG) [66], mixed surfactants of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulphate [67] and sodium dodecanesulphonate (SDS) [68] are also mixed with AgNO 3 solution for fabrication of dendritic silver nanocrystals.…”

Section: Ag Dendrites Fabrication Via Electrochemical Methodsmentioning

confidence: 99%

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Insight into the fabrication and perspective of dendritic Ag nanostructures

Cai

et al. 2017

Journal of Experimental Nanoscience

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This article reviews recent advances in the shape-controlled synthesis routes of hierarchical Ag dendritic nanostructures. Various fabricated techniques, with or without templates or surfactants, electrochemical method and sonochemical, microwave or photochemical assisted synthesis method, can be amazingly effective in the dendritic Ag nanostructures synthesis, if synthetic parameters are carefully selected. The involved synthesis mechanism are discussed in order to control the limited factors along the fabricated progress efficiently and then to find new synthetic means. Also, the blemish of the above synthesis routes that hinders the practical application is pointed out to inspire the future research.

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Section: Ag Dendrites Fabrication Via Template Methodsmentioning

confidence: 99%

Section: Ag Dendrites Fabrication Via Electrochemical Methodsmentioning

confidence: 99%

Insight into the fabrication and perspective of dendritic Ag nanostructures

Cai

et al. 2017

Journal of Experimental Nanoscience

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“…) is similar to that of Ag nanosponges prepared by reduction of silver nitrate in a multicomponent system and by a subsequent thermal fusion during shaking at 60 °C as well as to Ag‐quantum dots sponge‐like nanocomposites . Concerning the employment of the nanostructures for the purposes of SERS spectroscopy, the major difference between the last mentioned Ag nanosponges, as well as the other types of recently prepared Ag nanostructures, and the macroscopic nanosponge Ag aggregates reported in this paper is that the analyte has been already incorporated into their fractal building blocks. Therefore, while the former Ag nanostructures represent substrates for SERS, the latter represents a SERS active system in which an analyte is already localized by a simple addition of its aqueous solution (of varying concentrations) into the parent HA‐Ag NP hydrosol/HCl system.…”

Section: Resultsmentioning

confidence: 99%

SERS microRaman spectral probing of adsorbate-containing, liquid-overlayed nanosponge Ag aggregates assembled from fractal aggregates

Sutrová

Šloufová

Nevoralová

et al. 2015

J. Raman Spectrosc.

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Adsorbate‐containing, nanosponge Ag aggregates overlayed by a thin (~1.5 mm) liquid layer are reported as a new type of sample for Surface‐enhanced Raman scattering (SERS) microRaman spectral measurements and adsorbate (analyte) detection. Macroscopic Ag aggregates (of about 1.5 × 1.0 × 0.025 mm size) with the nanosponge internal morphology (revealed by Scanning electron microscopy (SEM)) were prepared by 3D assembling of fused fractal aggregates (D = 1.84 ± 0.04) formed in Ag nanoparticle hydrosol/HCl/adsorbate systems with 2,2’‐bipyridine (bpy) and/or a cationic free‐base tetrakis(2‐methyl‐4‐pyridiniumyl) porphine (H2TMPyP) as the testing adsorbates. For SERS microRaman measurements, the macroscopic aggregate was overlayed by a thin (~1.5 mm) layer of the residual liquid. Preparation procedure, nanoscale imaging, and SERS spectral probing including the determination of the detection limits of the adsorbates revealed the following advantages of the adsorbate‐containing, liquid‐overlayed 3D nanosponge aggregate as a sample for SERS microRaman spectral measurements: (1) localization of adsorbate (analyte) into hot spots and, simultaneously, prevention of the analyte decomposition during the spectral measurement (carried out without an immersion objective), (2) fast and simple sample preparation, and (3) minimization of sample volume and an efficient concentration of hot spots into the focus of the laser beam. The advantages of the nanosponge Ag aggregates are further demonstrated by the 40 fmol limit of detection of bpy as Ag(0)‐bpy surface complex, as well as by preservation of the native structure of the cationic free‐base porphyrin H2TMPyP. Copyright © 2015 John Wiley & Sons, Ltd.

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“…A simple method based on the application of a porous matrix for the controlled and localized formation of complex shape plasmonic metal nanostructures has been proposed in our previous publications [23][24][25]. It was shown that the morphology of aggregated structures of copper and silver can be controlled over the large silicon surfaces via galvanic replacement.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Microstructure Evolution of Gold Nanostructures in the Limited Volume Porous Matrices

Yakimchuk¹,

Bundyukova²,

Ustarroz

et al. 2020

Sensors

Self Cite

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The modern development of nanotechnology requires the discovery of simple approaches that ensure the controlled formation of functional nanostructures with a predetermined morphology. One of the simplest approaches is the self-assembly of nanostructures. The widespread implementation of self-assembly is limited by the complexity of controlled processes in a large volume where, due to the temperature, ion concentration, and other thermodynamics factors, local changes in diffusion-limited processes may occur, leading to unexpected nanostructure growth. The easiest ways to control the diffusion-limited processes are spatial limitation and localized growth of nanostructures in a porous matrix. In this paper, we propose to apply the method of controlled self-assembly of gold nanostructures in a limited pore volume of a silicon oxide matrix with submicron pore sizes. A detailed study of achieved gold nanostructures’ morphology, microstructure, and surface composition at different formation stages is carried out to understand the peculiarities of realized nanostructures. Based on the obtained results, a mechanism for the growth of gold nanostructures in a limited volume, which can be used for the controlled formation of nanostructures with a predetermined geometry and composition, has been proposed. The results observed in the present study can be useful for the design of plasmonic-active surfaces for surface-enhanced Raman spectroscopy-based detection of ultra-low concentration of different chemical or biological analytes, where the size of the localized gold nanostructures is comparable with the spot area of the focused laser beam.

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Silver nanostructures formation in porous Si/SiO2 matrix

Cited by 32 publications

References 57 publications

Insight into the fabrication and perspective of dendritic Ag nanostructures

Insight into the fabrication and perspective of dendritic Ag nanostructures

SERS microRaman spectral probing of adsorbate-containing, liquid-overlayed nanosponge Ag aggregates assembled from fractal aggregates

Morphology and Microstructure Evolution of Gold Nanostructures in the Limited Volume Porous Matrices

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