A Facile Method to Prepare Molecularly Imprinted Layer-by-Layer Nanostructured Multilayers Using Postinfiltration and a Subsequent Photo-Cross-Linking Strategy

Zhou, Yong; Cheng, Mengjiao; Zhu, Xiaoqun; Zhang, Yajun; An, Qi; Shi, Feng

doi:10.1021/am4023626

Cited by 35 publications

(37 citation statements)

References 18 publications

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“…3,4 For decades, the LbL method has attracted wide attention and has been applied in various elds such as nanocomposites, 5 superhydrophobic coatings, 6,7 surface imprinted multilayers, 8,9 separation membranes, 10 reinforcing materials, 11 protein immobilization, 12 hollow capsules, 13 and erasable 14 or freestanding lms. 15,16 But the LbL technique is still facing a challenge in improving the lm-growing efficiency for application to industrial or commercial uses because the conventional LbL dipping approach is always time consuming.…”

Section: Introductionmentioning

confidence: 99%

Rapid multilayer construction on a non-planar substrate by layer-by-layer self-assembly under high gravity

Liu¹,

Luo²,

Jiang³

et al. 2014

RSC Adv.

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Rapid construction of layer-by-layer (LbL) self-assembled multilayers on non-planar substrates is challenging because most conventional LbL processes are time consuming, which restricts further applications of LbL in industry and its commercialization. Therefore, herein we introduced the high gravity (HG) technique, which is a well-established industrial chemical engineering process for intensification of mass transfer, into the LbL assembly process to realize rapid film deposition on porous nickel foam. By using a model system of electrostatically driven PDDA/AuNPs multilayers, the adsorption kinetics, LbL procedure and film morphology have been examined under both conventional dipping conditions and a HG field. The results show that the time to reach saturated adsorption of building blocks with the HG field has been shortened remarkably by up to 16 times while the film quality remains identical. In this way, the fabrication of LbL multilayers can be highly accelerated in the presence of a HG field without disturbing the film quality on non-planar substrates. Moreover, the mechanism for the rapid construction of LbL multilayers using the HG technique is interpreted using the boundary layer theory that the highly turbulent flow in the HG field enhanced the mass transfer rate for the rapid adsorption of building blocks onto substrates.

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Section: Introductionmentioning

confidence: 99%

Rapid multilayer construction on a non-planar substrate by layer-by-layer self-assembly under high gravity

Liu¹,

Luo²,

Jiang³

et al. 2014

RSC Adv.

Self Cite

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“…30 But the spatial effect of the functional group of the template molecules, which is vital for conventional imprinting polymers, was barely studied. Toward this end, as well as to determine the molecular selectivity, the saturated binding cycles of imprinted nanofibers toward different analytes were investigated using Fast Green.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Layer-by-Layer Surface Molecular Imprinting on Polyacrylonitrile Nanofiber Mats

et al. 2015

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Surface molecular imprinting in layer-by-layer (SMI-LbL) film is known as a facile and effective strategy to build imprinting sites that are more accessible to template molecules compared with molecular imprinting in polymers. Herein, we accomplished the formation of SMI-LbL film on electrospun nanofibers for the first time. The SMI-LbL nanofibers were prepared by a template-induced LbL process on the polyacrylonitrile (PAN) nanofiber substrates, followed by postinfiltrating and photo-cross-linking of photosensitive agent 4,4'-diazostilbene-2,2'-disulfonic acid disodium salt (DAS). The obtained nanofiber mat maintained the nanofibrous structure and showed rapid absorption and extraction of template molecules of meso-tetra(4-carboxyphenyl)-porphine (Por). The binding capacity of Por reached 2.1 mg/g when 3.5 bilayers were deposited on the nanofibers. After six cycles of extraction and reabsorption, the binding capacity of Por remained at 83%. Moreover, the absorption results of the targeted templated molecule of Por and the control molecule of Fast Green, which had a very similar chemical structure and charge status to Por, indicated the specific absorption for template molecule of Por. Thus, a surface molecular imprinted nanofiber mat with high selectivity of the templated molecule has been demonstrated.

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“…Shi et al prepared the first SmiLbL film in 2007 by employing a macromolecular complex first fabricated from both (Poly)acrylic acid and a porphyrin derivative, and then used it as building block for the LbL preparation of a polyelectrolyte multilayer film [39]. This initial SmiLbL approach was based on a pH-tunable electrostatic interaction to yield quantitative and reversible uptake and release [40,41]. Similar concepts aim at an optimization of selectivity by employing more specific interactions for molecular recognition, such as disulfide [42] or amide bonds [43] charge transfer interactions [44] and hydrogen bonds [45,46].…”

Section: Introductionmentioning

confidence: 99%

pH-Responsive Host–Guest Complexation in Pillar[6]arene-Containing Polyelectrolyte Multilayer Films

Nicolas

Zhang

et al. 2017

Polymers

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Abstract:A water-soluble, anionic pillar [6]arene derivative (WP6) is applied as monomeric building block for the layer-by-layer self-assembly of thin polyelectrolyte multilayer films, and its pH-dependent host-guest properties are employed for the reversible binding and release of a methylviologen guest molecule. The alternating assembly of anionic WP6 and cationic diazo resin (DAR) is monitored in-situ by a dissipative quartz crystal microbalance (QCM-D). In solution, the formation of a stoichiometric inclusion complex of WP6 and cationic methylviologen (MV) as guest molecule is investigated by isothermal titration calorimetry and UV-vis spectroscopy, respectively, and attributed to electrostatic interactions as primary driving force of the host-guest complexation. Exposure of WP6-containing multilayers to MV solution reveals a significant decrease of the resonance frequency, confirming MV binding. Subsequent release is achieved by pH lowering, decreasing the host-guest interactions. The dissociation of the host-guest complex, release of the guest from the film, as well as full reversibility of the binding event are identified by QCM-D. In addition, UV-vis data quantify the surface coverage of the guest molecule in the film after loading and release, respectively. These findings establish the pH-responsiveness of WP6 as a novel external stimulus for the reversible guest molecule recognition in thin films.

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A Facile Method to Prepare Molecularly Imprinted Layer-by-Layer Nanostructured Multilayers Using Postinfiltration and a Subsequent Photo-Cross-Linking Strategy

Cited by 35 publications

References 18 publications

Rapid multilayer construction on a non-planar substrate by layer-by-layer self-assembly under high gravity

Rapid multilayer construction on a non-planar substrate by layer-by-layer self-assembly under high gravity

Layer-by-Layer Surface Molecular Imprinting on Polyacrylonitrile Nanofiber Mats

pH-Responsive Host–Guest Complexation in Pillar[6]arene-Containing Polyelectrolyte Multilayer Films

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