Silver nanoparticles/free-standing carbon nanotube Janus membranes.

Ibáñez, David; Galindo, Miguel A.; Colina, Álvaro; Vallés, E.; Heras, Aránzazu; Gómez, Elvira

doi:10.1016/j.electacta.2017.04.106

Cited by 5 publications

(3 citation statements)

References 62 publications

(67 reference statements)

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“…This limitation reduces the amount of material prepared and has to be solved for enabling the transfer of lab-scale preparation of the above mentioned and highly sophisticated designs to the large-scale production. In addition to the film formation at the interface, there are other sophisticated methods for fabrication of 2D Janus-type analytics. ,,,, Recently, Sun and coworkers combined dopamine chemistry with layer-by-layer deposition technique to prepare thin Janus-type films with a wetting contrast between both sides . Synthesis of dopamine modified poly(acrylic acid) (PAA-dopa) was reported, which was then layer-by-layer assembled with poly(vinylpyrrolidone) (PVPON) to prepare (PVPON/PAA-dopa) film.…”

Section: Artificial Janus Interfacesmentioning

confidence: 99%

Janus Interface Materials: A Critical Review and Comparative Study

Söz

Trosien

Biesalski

2020

ACS Materials Lett.

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In recent years, Janus interface materials with wettability contrast have attracted remarkable attention because of their beneficial properties and versatile potential applications in materials science including transport, purification/ separation, analytical testing, and medical applications. Regarding the wide range of highly promising possible application areas, these materials will have a major impact on the next generation of smart systems. In this Review, our aim is to highlight the current status of the research on Janus interface materials with special emphasis on wettability contrast. In the first section, a brief history of the literature on Janus-type materials and interfaces, materials possessing different chemistries or topographies on opposing sites, is introduced. In the second section, theories behind wetting, including "wettability integration", are summarized, which can be regarded as the combination of opposing wetting properties within the same material. Afterwards, natural examples of Janus interfaces, a branch of superwettability integration, are discussed, which inspired the researchers to mimic the nature and develop artificial analogues. In the next section, the current status on artificial Janus interfaces with wettability contrast are reviewed, subcategories for which are implemented according to the (possible) application areas and also the origin of their base substrates. Then, the inorganic and organic based artificial Janus interfaces were compared in terms of advantages and disadvantages. Finally, a conclusion and outlook are given.

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Section: Artificial Janus Interfacesmentioning

confidence: 99%

Janus Interface Materials: A Critical Review and Comparative Study

Söz

Trosien

Biesalski

2020

ACS Materials Lett.

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“…The methodology employed in the preparation of FS-SWCNT filters is based on previous works [37,54,55]. Briefly, it consists of seven consecutive steps: (1) Preparation of a homogeneous dispersion of SWCNTs in DCE (5 mg/L).…”

Section: Fabrication Of Free-standing Carbon Nanotube Filtersmentioning

confidence: 99%

Spectroelectrochemical monitoring of contaminants during the electrochemical filtration process using free-standing carbon nanotube filters

Ibáñez

Gómez

Vallés

et al. 2018

Electrochimica Acta

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Real-time process monitoring is still relatively scarce but is fundamental to provide in-situ information about different chemical and electrochemical processes. Particularly, electrochemical filtration has received growing attention in recent years due to the wide range of applications in which it can be successfully employed. Electrochemical removal is considered as an attractive methodology for the treatment of wastewater due to its efficiency in the removal of a huge number of contaminants. In this work, the development of a new device based on the use of UV-vis bare optical fibers in long optical pathway configuration allows us to monitor continuously the electrochemical degradation process during the filtration of different compounds. Spectroelectrochemistry additionally supplies quantitative information allowing us to calculate the efficiency of the electrochemical filtration process. The material selected to fabricate the electrochemical filter was single-walled carbon nanotubes that display not only high physical and chemical stability, but also high electrical conductivity. Therefore, the combination of electrochemical degradation methods, free-standing single-walled carbon nanotube filters and operando spectroelectrochemical techniques makes this outstanding device very interesting in the study of different molecules. As proof of concept, three different systems have been studied to validate the cell and demonstrate the good performance of the spectroelectrochemical device: otolidine (reference system), indigo carmine (organic dye), and 4-nitrophenol (hazardous pollutant).

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“…These properties can change as function of the metal, size, shape, or number of components of the NPs and are different from the bulk or their constituents because the surface of the NPs is structurally and compositionally different . Synthesis of metal NPs can be accomplished by different methods, such as chemical reduction, seed‐mediated, photochemical, electrochemical, sonochemical, lithography, galvanic replacement, thermal evaporation, radiolysis, sol–gel, laser ablation, chemical vapor deposition, microwave assisted, and biological assisted . The selection of the synthesis method, concentration of the reagents, and other experimental parameters, such as pH, temperature, and so forth, allows us to obtain NPs with specific size and shape.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of silver nanoparticles in the presence of different complexing agents by time‐resolved Raman spectroelectrochemistry

Ibáñez

Izquierdo

Fernandez-Blanco

et al. 2017

J Raman Spectroscopy

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Chemical and physical properties of metal nanoparticles (NPs) are determined not only by the synthesis method used to prepare them but also by the experimental conditions under the generation process takes place. One of the most important factors in the synthesis of NPs is the presence of complexing agents in the media that can change the size and shape of the NPs. The significant role of different complexing agents (cyanide, ethylenediaminetetraacetic acid, and ethylenediamine) in the electrochemical formation of silver nanoparticles (AgNPs) has been analyzed by time‐resolved Raman spectroelectrochemistry. Electrochemical and spectroscopic responses, obtained simultaneously, provide suitable information about the changes that occur on the platinum electrode surface during the AgNPs electrodeposition. The morphology of AgNPs has been analyzed by ultraviolet–visible absorption spectroelectrochemistry, providing additional information and a detailed view of the electrodeposition process. The influence of the complexing agent used to generate AgNPs has been studied analyzing the surface‐enhanced Raman scattering (SERS) effect of the modified substrate. Raman spectra show different SERS behavior depending on the complexing agent and therefore on the AgNPs generated. The relationship between SERS signals and the morphology of AgNPs has been displayed by scanning electron microscopy images. Time‐resolved Raman spectroelectrochemistry confirms that chemical mechanism is necessary for SERS effect.

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Silver nanoparticles/free-standing carbon nanotube Janus membranes.

Cited by 5 publications

References 62 publications

Janus Interface Materials: A Critical Review and Comparative Study

Janus Interface Materials: A Critical Review and Comparative Study

Spectroelectrochemical monitoring of contaminants during the electrochemical filtration process using free-standing carbon nanotube filters

Electrodeposition of silver nanoparticles in the presence of different complexing agents by time‐resolved Raman spectroelectrochemistry

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