Self-assembly of poly(ionic liquid) (PIL)-based amphiphilic homopolymers into vesicles and supramolecular structures with dyes and silver nanoparticles

Manojkumar, Kasina; Mecerreyes, David; Taton, Daniel; Gnanou, Yves; Vijayakrishna, Kari

doi:10.1039/c7py00453b

Cited by 28 publications

(22 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[36][37][38][39][40][41] On the basis of this factor, the self-assembly morphologies of ion-containing polymers could be triggered by simple anion exchange, which is a result of the tunable solubility of the ionic segments. [42][43][44][45][46][47][48][49][50] For example, Vijayakrishna et al found the size and shape of the self-assembled aggregates could be altered by exchanging of Br − counterions of ionic liquid blocks for − N(SO 2 CF 3 ) 2 . [42,43] Yan's group obtained colloidosomes from the self-assembly of amphiphilic random ionic copolymers after partial exchange of Cl − for PF 6 − .…”

Section: Doi: 101002/macp201800554mentioning

confidence: 99%

“…In particular, Cl − and Br − counterions are highly ionized in the presence of imidazolium‐based ionic blocks, while PF 6 − and bis(trifluoromethane)‐sulfonimide ( − NTf 2 ) are able to form tight ion‐pairs and turn the ionic blocks insoluble in water . On the basis of this factor, the self‐assembly morphologies of ion‐containing polymers could be triggered by simple anion exchange, which is a result of the tunable solubility of the ionic segments . For example, Vijayakrishna et al.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Counterion‐Mediated Self‐Assembly of Ion‐Containing Block Copolymers on the Basis of the Hofmeister Series

Zhong

Luo

Tang

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

A Cl− and I− ion‐containing amphiphilic diblock copolymer [PEO‐b‐P(qVBC‐co‐St)], IBCP, which comprises the poly(ethylene oxide) block and poly(quaternized 4‐vinylbenzyl chloride‐co‐styrene) is prepared by sequence reactions. Then the counterion‐mediated self‐assembly behavior in aqueous solution is investigated in detail. The hydrophilicity of anion containing units (qVBC) is controlled by the nature of the different counterions after ion exchange, which is crucial in regulating the self‐assembly process. The addition of Br−, I−, and SCN− counterions (based on the Hofmeister series) results in the formation of tighter ion‐pairs with cations (i.e., more hydrophobic as the qVBC units), which triggers spheres to vesicles, micro‐meter long cylinders and “branched wormlike” aggregates, respectively. Moreover, addition of different amounts of Cl− also causes morphological transition from spheres to long cylinders. And this morphological transition is totally reversible after removing additional Cl−. The adhesive collisions of spherical particles may contribute to the observed sphere‐to‐cylinder morphological transition.

show abstract

Section: Doi: 101002/macp201800554mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Counterion‐Mediated Self‐Assembly of Ion‐Containing Block Copolymers on the Basis of the Hofmeister Series

Zhong

Luo

Tang

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

show abstract

“…For example, Clˉ and Brˉ counterions are considered as highly ionized ions for fixed polycations, while PF 6 ˉ and bis(trifluoromethane)‐sulfonimide (ˉNTf 2 ) are able to form tight ion pairs and turn cationic blocks insoluble in water but soluble in common organic solvents . On the basis of this factor, the morphological structures of cation‐containing polymers could be manipulated by simple anion exchange, which results from the tunable solubility of the ionic blocks . For example, Vijayakrishna and co‐workers found that the morphology of aggregates could be altered by exchanging of ˉN(SO 2 CF 3 ) 2 for Brˉ in imidazolium‐based ionic blocks .…”

Section: Introductionmentioning

confidence: 99%

Interplay of Solvation and Size Effects Induced by the Counterions in Ionic Block Copolymers on the Basis of Hofmeister Series

Luo

Tang

Zhong

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

Two ionic block copolymers with different lengths of hydrophilic segments, polystyrene‐b‐poly(quaternized 4‐vinylpyridine)/ethyl bromide, are prepared by sequential reactions. They are originally self‐assembled into so‐called “large compound micelles” in aqueous solution. After ion exchange of Iˉ, SCN,ˉ and PF6ˉ for Brˉ, morphological transitions are controlled by a competition of solvation and size effects of the newly introduced counterions. The solvation effect is dominated in a relatively short corona‐forming block. Thus, sphere‐to‐wormlike particles, sphere‐to‐vesicle, and sphere‐to‐precipitate transitions are observed. In contrast, due to a long corona‐forming block, size effects become more profound after adding SCNˉ, thereby no morphological transition occurs. A morphological transition is characterized after partial exchange of Iˉ for Brˉ for both diblocks. A sphere‐to‐wormlike particles transition is observed only after most Brˉ is replaced by Iˉ. This work extends the understanding of morphological regulation through simple ion exchange and encourages rational design of nano‐assemblies.

show abstract

“…Recently, a growing body of literature has extensively studied and evaluated several self-assembly approaches in SERS studies [ 8 , 9 , 10 ]. Currently, different techniques are being used to arrange self-assembled AgNPs over a large area, thanks to polymers [ 11 , 12 , 13 , 14 , 15 ], block copolymers [ 16 , 17 , 18 ], dendrimers [ 19 ], proteins [ 20 ], and deoxyribonucleic acid (DNA) molecules [ 21 , 22 ] acting as matrices for inducing ordering and anisotropic orientation on surfaces, and for controlling the number of constituent particles and their separation. [ 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Ag Nanocomposites into Ultra-Sensitive and Reproducible Large-Area SERS-Active Opaque Substrates

Fahes¹,

Naciri²,

Navvabpour

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

This work describes a novel, one-shot strategy to fabricate ultrasensitive SERS sensors based on silver/poly(methyl methacrylate) (PMMA) nanocomposites. Upon spin coating of a dispersion of PMMA and silver precursor on N-doped silicon substrate, closely separated silver nanoparticles were self-assembled into uniform nanospheres. As a result, a thin hydrophobic PMMA layer embedded with Ag nanoparticles (AgNPs) was obtained on the whole silicon substrate. Consequently, a large-scale, reproducible SERS platform was produced through a rapid, simple, low-cost, and high-throughput technology. In addition, reproducible SERS features and high SERS enhancement factors were determined (SEF ~1015). This finding matches the highest SEF reported in literature to date (1014) for silver aggregates. The potential and novelty of this synthesis is that no reducing agent or copolymer was used, nor was any preliminary functionalization of the surface carried out. In addition, the AgNPs were fabricated directly on the substrate’s surface; consequently, there was no need for polymer etching. Then, the synthetic method was successfully applied to prepare opaque SERS platforms. Opaque surfaces are needed in photonic devices because of the absence of secondary back reflection, which makes optical analysis and applications easier.

show abstract

Self-assembly of poly(ionic liquid) (PIL)-based amphiphilic homopolymers into vesicles and supramolecular structures with dyes and silver nanoparticles

Abstract: Self assembly of amphiphilic homo-PILs.

Cited by 28 publications

References 61 publications

Counterion‐Mediated Self‐Assembly of Ion‐Containing Block Copolymers on the Basis of the Hofmeister Series

Counterion‐Mediated Self‐Assembly of Ion‐Containing Block Copolymers on the Basis of the Hofmeister Series

Interplay of Solvation and Size Effects Induced by the Counterions in Ionic Block Copolymers on the Basis of Hofmeister Series

Self-Assembled Ag Nanocomposites into Ultra-Sensitive and Reproducible Large-Area SERS-Active Opaque Substrates

Contact Info

Product

Resources

About