Characterization of the electric double layers of multi-walled carbon nanotubes, laponite and nanotube + laponite hybrids in aqueous suspensions

Manilo, Maryna; Lebovka, Nikolaï; Bárány, Sándor

doi:10.1016/j.colsurfa.2014.09.006

Cited by 31 publications

(23 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of pH and concentration of electrolytes on the electrophoretic mobility of NTs and laponite clay disks were studied in our previous work [16]. Also the dependences of electrophoretic mobility of NT+laponite hybrid nanoparticles as a function of laponite concentration were measured.…”

Section: Resultsmentioning

confidence: 99%

“…The specific surface Page 6 of 31 A c c e p t e d M a n u s c r i p t area of NTs, determined by nitrogen adsorption, was 254 m 2 /g. The NTs have several walls within the range of 6-8 layers and their density varies from 1.6 g/cm 3 to 1.0 g/cm 3 with increasing the outer diameter from 10 nm to 20 nm [16]. According to FTIR spectra, the NT surface contained a small amount of hydroxyl and carboxylic groups and at neutral pH value their electrophoretic potential was -32 mV [16].…”

Section: Methodsmentioning

confidence: 98%

See 1 more Smart Citation

Stability of multi-walled carbon nanotube+laponite hybrid particles in aqueous suspensions

Manilo

Lebovka

Bárány

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 98%

Stability of multi-walled carbon nanotube+laponite hybrid particles in aqueous suspensions

Manilo

Lebovka

Bárány

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

Self Cite

View full text Add to dashboard Cite

“…10.5). The observed attraction between similarly charged colloidal particles of MWCNTs and Lap was explained by the highly heterogeneous distribution of negatively charged functional groups on the surface of MWCNTs and difference in electrophoretic mobility of MWCNT and Lap particles [24].…”

Section: Dispersing Of Cntsmentioning

confidence: 98%

“…For these MWCNTs the inner and outer diameters were d i ≈ 5 nm and d ≈ 10 nm, respectively and the number of walls n was 7. [24]. With permission).…”

Section: A Short Introduction To Cntsmentioning

confidence: 94%

See 1 more Smart Citation

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Lisetski

Soskin

Lebovka

2015

Springer Proceedings in Physics

Self Cite

View full text Add to dashboard Cite

The structure and properties of liquid crystalline suspensions filled by carbon nanotubes (CNTs) are critically reviewed. Special attention is paid to interactions between CNTs and molecules of the liquid crystals (LC), which lead to formation of ordered supramolecular structures. These structures, in turn, determine unique physical properties of LC + CNT suspensions, including electrical conductivity, dielectric permittivity, phase transitions, optical transmission, memory effects that can be used in electrooptic and optoelectronic devices, etc. Great variety of LC phases are considered as a host media, such as nematics, cholesterics, smectics of different types (including ferroelectrics), lyotropic, chromonic, ionic and hydrogen-bonded liquid crystals. Alongside multi-and single-walled carbon nanotubes, the suspensions can also contain the platelets of organoclays used for facilitation of CNT dispersing. Recent practical applications of LC + CNT suspensions and nanomaterials based thereon are also outlined.

show abstract

Periodically Alternating Electric Field Layers Induces the Preferential Growth of Zn (002) Plane for Ultralow Overpotential Zinc‐Ion Batteries

Feng

Cui

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

However, the commercialization of ZIB was hindered by the low coulombic efficiency (CE) and fast failure of zinc metal anodes caused by uncontrolled dendrite growth, continuous hydrogen evolution reaction (HER), and insulating by-product resulting from electrolyte decomposition (Figure S1, Supporting Information). [3] Currently, much research has focused on tuning the local electric field to regulate Zn anodes. In addition, two strategies were mainly adopted (Scheme 1a). First, introduce negative electric field/negative charge groups to unify the electric field by adsorbing ions and homogenizing the ion flux. Pan et al. constructed an anionic MOF (ZSB) with a large number of sulfonate groups on the Zn anode to homogeneous Zn deposition. [4] In addition, many works also successfully built a negative electric field at the Zn anode such as SO 4 2− receptors, [5] CeO 2 , [6] and tetragonal KTa 0.54 Nb 0.46 O 3 [7] to effectively accelerate the ion flux and disperse Zn 2+ to inhibit the growth of dendrites. However, the negative electric field has less effect on water molecules, making it difficult to solve the problem of slow de-solvation, HER, and by-products. As a result, a multilayer electric field is designed to homogenize the Zn 2+ deposition and accelerate de-solvation. Chao et al. developed an amphiphilic charge silk fibroin (SF) coating. [8] The negative charge of the surface accelerates Zn 2+ transport and homogenizes ion flux. Meanwhile, the positive charge can accelerate the de-solvation of [Zn(H 2 O) 6 ] 2+ and provide nucleation sites for uniform Zn 2+ deposition. Switchable polarized materials, [9] NaCN-PAN, [10] and poly-zwitterionic ionic liquid coatings [11] additionally enable bifunctional regulation of the Zn anode. Multilayer amphiphilic charge layer can effectively stabilize the Zn anode; however, positive electric field severely hinders the diffusion of Zn 2+ to the anode, leading to an increase in cell polarization. Therefore, on the basis of effective desolvation, accelerating diffusion of Zn 2+ and homogenizing ion flux are expected to achieve a more stable Zn anode.Herein, we propose a general periodically alternating electric field layers strategy. Unlike the multilayer electric field, the periodically alternating electric field on nanoscale allows for effective de-solvation and uniform ion flux within the same layer of space (Scheme 1b). We demonstrate the laponite (LAP), a 2D silicate with typical charge separation properties,The sluggish de-solvation kinetics and uneven Zn 2+ transport behavior at the Zn anode are undesirable for commercialization of zinc ion batteries. To address these issues, a periodically alternating electric field is introduced on the Zn anode by constructing a laponite nano-clay layer with unique electric field separation properties. This layer exhibits negative and positive electric fields together in the same space but in different directions (negative electric field in the normal direction while the positive electric field is in the radial direction); thus, ac...

show abstract

Characterization of the electric double layers of multi-walled carbon nanotubes, laponite and nanotube + laponite hybrids in aqueous suspensions

Cited by 31 publications

References 29 publications

Stability of multi-walled carbon nanotube+laponite hybrid particles in aqueous suspensions

Stability of multi-walled carbon nanotube+laponite hybrid particles in aqueous suspensions

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Periodically Alternating Electric Field Layers Induces the Preferential Growth of Zn (002) Plane for Ultralow Overpotential Zinc‐Ion Batteries

Contact Info

Product

Resources

About