Supramolecular Self-Assembly of Amphiphiles on Carbon Nanotubes: A Versatile Strategy for the Construction of CNT/Metal Nanohybrids, Application to Electrocatalysis

Mackiewicz, Nicolas; Surendran, G.; Remita, Hynd; Keita, Bineta; Zhang, Guangjin; Nadjo, L.; Hagège, Agnès; Doris, Eric; Mioskowski, Charles

doi:10.1021/ja8026373

Cited by 138 publications

(79 citation statements)

References 18 publications

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“…On the other hand, on multi-walled CNTs, single-tailed ionic surfactants have been reported to form helical striations. 16,17 Also on multi-walled CNTs, Richard et al speculated that the various helical striations they observed SDS to produce follow the underlying carbon network. 16 Furthermore, single-tailed lipids, such as lysophosphadidylcholine (LPC) and lysophosphatidylglycerol have been also found to form striations on CNTs.…”

Section: Introductionmentioning

confidence: 99%

Controlling Carbon-Nanotube—Phospholipid Solubility by Curvature-Dependent Self-Assembly

2015

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Control of aqueous dispersion is central in the processing and usage of nanoscale hydrophobic objects. However, selecting dispersive agents based on the size and form of the hydrophobic object and the role of coating morphology in dispersion efficiency remain important open questions. Here, the effect of the substrate and the dispersing molecule curvature, as well as, the influence of dispersant concentration on the adsorption morphology are examined by molecular simulations of graphene and carbon nanotube (CNT) substrates with phospholipids of varying curvature as the dispersing agents. Lipid spontaneous curvature is increased from close to zero (effectively cylindrical lipid) to highly positive (effectively conical lipid) by studying double tailed dipalmitoylphosphadidylcholine (DPPC) and single tailed lysophosphadidylcholine (LPC) which differ in the number of acyl chains but have identical head group.We find that lipids are good dispersion agents for both planar and curved nanoparticles and induce a dispersive barrier non-size selectively. Differences in dispersion efficiency arise from lipid head group density and their extension from the hydrophobic substrate in the adsorption morphology. We map the packing morphology contributing factors and report that the aggregate morphologies depend on the competition of interactions rising from 1) hydrophobicity driven maximization of lipid-substrate contacts and lipid self-adhesion, 2) tail bending energy cost, 3) preferential alignment along the graphitic substrate principal axes, and 4) lipid head group preferential packing.Curved substrates adjust the morphology by changing the balance between the interaction strengths. Jointly, the findings show substrate curvature and dimensions are a way to tune lipid adsorption to desired, self-assembling patterns. Besides engineering dispersion efficiency, the findings could bear significance in designing materials with defined molecular scale, molecular coatings for orientation specific CNT assembly or lipid-based molecular masks and patterning on graphene.2

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Section: Introductionmentioning

confidence: 99%

Controlling Carbon-Nanotube—Phospholipid Solubility by Curvature-Dependent Self-Assembly

2015

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“…New multifunctional nanoparticle-nanotube hybrid systems, due to their unique and superior properties compared with their pure counterparts, increasingly forming the foundation of transformational developments in areas as diverse as electronics, photonics, catalysis, biotechnology, and energy storage among many other applications (Wu et al 2011;Mackiewicz et al 2008;Georgakilas et al 2007;Kong et al 2007;Li et al 2009). Single-walled aluminosilicate nanotubes (AlSiNTs) are excellent candidates for fabricating various functional nanohybrid materials due to their well-defined one-dimensional structure (Yucelen et al 2011;Thill et al 2012), vast range of tunable compositions (Avellan et al 2014), functionalizable surfaces (Kang et al 2011), attainability in pure form without a catalyst (Yucelen et al 2011), and ability to readily form hydrogels, transparent films, powders, and coatings (Jiravanichanun et al 2011;Kuroda et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

et al. 2015

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A novel colloidal method is presented to synthesize silver nanoparticles on aluminosilicate nanotubes. The technique involves decomposition of AgNO 3 solution to Ag nanoparticles in the presence of aluminosilicate nanotubes at room temperature without utilizing of reducing agents or any organic additives. Aluminosilicate nanotubes are shown to be capable of providing a unique chemical environment, not only for in situ conversion of Ag ? into Ag 0 , but also for stabilization and immobilization of Ag nanoparticles. The synthesis strategy described here could be implemented to obtain self-assembled nanoparticles on other single-walled metal oxide nanotubes for unique applications. Finally, we demonstrated that nanotube/nanoparticle hybrid show strong antibacterial activity toward Gram-positive Staphylococcus epidermidis and Gram-negative Escherichia coli.

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“…In order to enhance the efficiency of DMFCs and to accelerate the electron transfer rate, carbon nanotubes (CNTs) with high specific surface areas, electrical conductivities, and chemical stability have been used as supports for the preparation of Pt nanoparticles (NPs)/CNT nanohybrids [3][4][5][6][7]. However, pristine CNTs have insufficient binding sites to anchor Pt ions (precursors) and NPs, which lead to poor dispersion, aggregation of NPs [8], inefficient catalytic activity, poor reproducibility, and poor durability of Pt NPs/CNT nanohybrids.…”

Section: Introductionmentioning

confidence: 99%

Active and stable platinum/ionic liquid/carbon nanotube electrocatalysts for oxidation of methanol

Shih

Periasamy

Lin

2014

ScienceOpen Research

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Supramolecular Self-Assembly of Amphiphiles on Carbon Nanotubes: A Versatile Strategy for the Construction of CNT/Metal Nanohybrids, Application to Electrocatalysis

Cited by 138 publications

References 18 publications

Controlling Carbon-Nanotube—Phospholipid Solubility by Curvature-Dependent Self-Assembly

Controlling Carbon-Nanotube—Phospholipid Solubility by Curvature-Dependent Self-Assembly

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

Active and stable platinum/ionic liquid/carbon nanotube electrocatalysts for oxidation of methanol

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