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Zhang Y, Tong C, Ma Z, Lu L, Fu H, Pan S, Tong W, Li X, Zhang Y, An Q. A self-powered delivery substrate boosts active enzyme delivery in response to human movements. NANOSCALE 2019; 11:14372-14382. [PMID: 31332411 DOI: 10.1039/c9nr04673a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Stimulated drug releases in response to human movements are highly appealing in medical therapy and various daily uses. However, the design of a mechanically responsive substrate that presents high delivery capacities and can also preserve the activities of sensitive molecules such as enzymes is still challenging. Taking advantage of the recent development in effective piezoelectric flexible films and in molecular delivery devices, we propose a composite delivery substrate that preserves enzyme activities and enhances molecular delivery in response to human movements such as finger presses or massages. The substrate is achieved by combining two parts, which are the energy converting unit and the molecular loading and releasing unit. The energy converting unit is a piezoelectric-dielectric flexible composite film that produces enhanced electricity and preserves the electricity longer compared to a pure piezoelectric polymer. The molecular delivery unit is a layer-by-layer multilayer containing mesoporous silica particles that are assembled at pH 9 but used in neutral solutions. The releases of molecules including small molecules, peptides, and proteins are all accelerated in response to finger presses irrespective of the signs or densities of their charges. More importantly, the enzyme CAT preserves its activity after release from the composite substrates, meaning that the CAT-loaded (PAH/MS)n(PAH/DAS)n@rGO-TFB/PVDF-HFP composite substrate holds promise as a self-powered soothing pad that effectively removes residue H2O2.
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Affiliation(s)
- Yi Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China.
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2
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Lv F, Li C, Ma Y, Sun Z, Li R, Zhao Z. Fabrication of step-by-step drug release system both sensitive to magnetic field and temperature based on layered double hydroxides and PNIPAM. NANOTECHNOLOGY 2019; 30:055103. [PMID: 30520421 DOI: 10.1088/1361-6528/aaf095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fabrication of environmental sensitive and controllable drug release systems is urgently needed. In this paper, thermosensitive and magnetic response drug release systems were fabricated via layer-by-layer technique using acetylsalicylic acid (AA) intercalated ZnAl-LDH as core, poly (N-isopropylacrylamide) (PNIPAM) and AA micelles as well as small size ZnAl-LDH sheets as building blocks of the shell. By forming anionic micelles, cationic PNIPAM macromolecules were sandwiched in the LDH sheets with cationic charges which provided a novel way of fabrication of drug release systems. The characteristics of the building blocks, the fabrication process and the release behaviors of the as-prepared drug release systems were characterized in detail. Due to the micro-environmental difference of AA in the core and shell of the systems, step-by-step release behaviors were observed. Also the drug release systems showed obvious temperature and magnetic field dependent responsibility. The obtained assembly is a potential drug release system.
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Affiliation(s)
- Fengzhu Lv
- School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, People's Republic of China
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Zhang Y, An Q, Tong W, Li H, Ma Z, Zhou Y, Huang T, Zhang Y. A New Way to Promote Molecular Drug Release during Medical Treatment: A Polyelectrolyte Matrix on a Piezoelectric-Dielectric Energy Conversion Substrate. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802136. [PMID: 30117268 DOI: 10.1002/smll.201802136] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Enhanced drug releases in a timely manner during urgent medical treatments would significantly enhance the prognosis of patients. Inspired by the facilitated molecular transports by the potentials, an enhanced drug release strategy driven by mechanical disturbances that widely exist in medical treatment processes is proposed. This strategy is enabled by a functional material comprised of multilayers of dendrimers as the drug reservoir, which are built on a piezoelectric-dielectric flexible film with reduced graphene oxide fillers. The generated voltages are higher and last longer than that in regular piezoelectric films. Photochemical crosslinking leads to a stable drug matrix which is even sustained in electric fields and high ionic strengths. The device enhances releases of positively, negatively, and zwitterionically charged molecules in response to mechanical stimuli and supports high cell viabilities. An illustrative application is demonstrated by preparing the material on the surface of a gastric lavage tube. The results show that the release of antiemetic drug increased by 200% within 60 min in response to forces mimicking human swallowing. This study contributes an integrative material that can realize electrically triggered releases that are previously only realized using complicated electrochemical setups. It is believed that this material can facilitate medicine applications in various emergent situations.
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Affiliation(s)
- Yi Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Wangshu Tong
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Haitao Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Zequn Ma
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Yan Zhou
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Tao Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China
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An Q, Huang T, Shi F. Covalent layer-by-layer films: chemistry, design, and multidisciplinary applications. Chem Soc Rev 2018; 47:5061-5098. [PMID: 29767189 DOI: 10.1039/c7cs00406k] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Covalent layer-by-layer (LbL) assembly is a powerful method used to construct functional ultrathin films that enables nanoscopic structural precision, componential diversity, and flexible design. Compared with conventional LbL films built using multiple noncovalent interactions, LbL films prepared using covalent crosslinking offer the following distinctive characteristics: (i) enhanced film endurance or rigidity; (ii) improved componential diversity when uncharged species or small molecules are stably built into the films by forming covalent bonds; and (iii) increased structural diversity when covalent crosslinking is employed in componential, spacial, or temporal (labile bonds) selective manners. In this review, we document the chemical methods used to build covalent LbL films as well as the film properties and applications achievable using various film design strategies. We expect to translate the achievement in the discipline of chemistry (film-building methods) into readily available techniques for materials engineers and thus provide diverse functional material design protocols to address the energy, biomedical, and environmental challenges faced by the entire scientific community.
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Affiliation(s)
- Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
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pH-Responsive Host⁻Guest Complexation in Pillar[6]arene-Containing Polyelectrolyte Multilayer Films. Polymers (Basel) 2017; 9:polym9120719. [PMID: 30966019 PMCID: PMC6418545 DOI: 10.3390/polym9120719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 02/04/2023] Open
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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6
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Combined “post-infiltration, subsequent photochemical cross-linking” and “cross-linking and selective etching” strategies to fabricate nanoporous layer-by-layer assembled multilayers. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-016-3990-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Luan X, Huang T, Zhou Y, An Q, Wang Y, Wu Y, Li X, Li H, Shi F, Zhang Y. Controlled Interfacial Permeation, Nanostructure Formation, Catalytic Efficiency, Signal Enhancement Capability, and Cell Spreading by Adjusting Photochemical Cross-Linking Degrees of Layer-by-Layer Films. ACS APPLIED MATERIALS & INTERFACES 2016; 8:34080-34088. [PMID: 27669359 DOI: 10.1021/acsami.6b10453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Interfacial properties including permeation, catalytic efficiency, Raman signal enhancement capabilities, and cell spreading efficiencies are important features that determine material functionality and applications. Here, we propose a facile method to adjust the above-mentioned properties by controlling the cross-linking degrees of multilayer using a photoactive molecule. After treating the cross-linked films in basic solutions, films with different cross-linking degrees presented varying residue thicknesses and film morphologies. As a result, these different films possessed distinct molecular loading and release characteristics. In addition, gold nanoparticles (AuNPs) of different morphological traits were generated by redox reactions coupled with diffusion within these films. The AuNP-polyelectrolyte obtained from the polyelectrolyte films of the medium cross-linking degrees displayed the highest catalytic efficiency and signal enhancement capabilities. Furthermore, cells responded to the variation of film cross-linking degrees, and on the films with the highest cross-linking degree, cells adhered with the highest speed. We expect this report to provide a general interfacial material engineering strategy for material designs.
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Affiliation(s)
- Xinglong Luan
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Tao Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Yan Zhou
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Yue Wang
- Soft Matter Center and Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , Beijing 100029, PR China
| | - Yaling Wu
- School of Chemistry and Molecular Engineering, Peking University , Beijing 100083, China
| | - Xiangming Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Haitao Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
| | - Feng Shi
- Soft Matter Center and Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , Beijing 100029, PR China
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing 100083, China
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8
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Ji F, You L, Wang L, Liu Z, Zhang Y, Lv S. Layer-by-Layer Assembled Chitosan-Based Antibacterial Films with Improved Stability under Alkaline Conditions. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fanqin Ji
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, China
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China
| | - Lina You
- Si Shui Xian Jian Yan Jian Ce Zhong Xin,
Sishui, Jining, Shandong, 273200, China
| | - Lei Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China
| | - Zhikai Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, China
| | - Yajun Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, China
| | - Shanshan Lv
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, China
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9
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Lin K, Gu Y, Zhang H, Qiang Z, Vogt BD, Zacharia NS. Accelerated Amidization of Branched Poly(ethylenimine)/Poly(acrylic acid) Multilayer Films by Microwave Heating. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9118-9125. [PMID: 27548626 DOI: 10.1021/acs.langmuir.6b02051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chemical cross-linking of layer-by-layer assembled films promotes mechanical stability and robustness in a wide variety of environments, which can be a challenge for polyelectrolyte multilayers in saline environments or for multilayers made from weak polyelectrolytes in environments with extreme pHs. Heating branched poly(ethylenimine)/poly(acrylic acid) (BPEI/PAA) multilayers at sufficiently high temperatures drives amidization and dehydration to covalently cross-link the film, but this reaction is rather slow, typically requiring heating for hours for appreciable cross-linking to occur. Here, a more than one order of magnitude increase in the amidization kinetics is realized through microwave heating of BPEI/PAA multilayers on indium tin oxide (ITO)/glass substrates. The cross-linking reaction is tracked using infrared spectroscopic ellipsometry to monitor the development of the cross-linking products. For thick films (∼1500 nm), gradients in cross-link density can be readily identified by infrared ellipsometry. Such gradients in cross-link density are driven by the temperature gradient developed by the localized heating of ITO by microwaves. This significant acceleration of reactions using microwaves to generate a well-defined cross-link network as well as being a simple method for developing graded materials should open new applications for these polymer films and coatings.
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Affiliation(s)
- Kehua Lin
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Yuanqing Gu
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Huan Zhang
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Zhe Qiang
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Bryan D Vogt
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Nicole S Zacharia
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
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10
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Fabrication of covalently linked PAH/PVS layer-by-layer assembled multilayers via a post-photochemical cross-linking strategy. Chem Res Chin Univ 2016. [DOI: 10.1007/s40242-016-5458-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Nie K, An Q, Zhang Y. A functional protein retention and release multilayer with high stability. NANOSCALE 2016; 8:8791-8797. [PMID: 27064353 DOI: 10.1039/c6nr01671e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Effective and robust interfacial protein retention lies at the heart of the fabrication of protein-based functional interfaces, which is potentially applicable in catalysis, medical therapy, antifouling, and smart devices, but remains challenging due to the sensitive nature of proteins. This study reports a general protein retention strategy to spatial-temporally confine various types of proteins at interfacial regions. The proteins were preserved in mesoporous silica nanoparticles embedded in covalently woven multilayers. It is worth noting that the protein retention strategy effectively preserves the catalytic capabilities of the proteins, and the multilayer structure is robust enough to withstand the bubbling catalytic reactions and could be repeatedly used due to conservation of proteins. The spatiotemporal retention of proteins could be adjusted by varying the number of capping layers. Furthermore, we demonstrate that the protein-loaded interfacial layers could not only be used to construct catalytic-active interfaces, but also be integrated as the power-generating unit to propel a macroscopic floating device.
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Affiliation(s)
- Kun Nie
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
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12
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Molecularly imprinted polymer particles: Formation, characterization and application. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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13
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Structure, molecular simulation, and release of a spirin from intercalated Zn–Al-layered double hydroxides. Colloids Surf B Biointerfaces 2015; 135:339-345. [DOI: 10.1016/j.colsurfb.2015.07.069] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/24/2015] [Accepted: 07/26/2015] [Indexed: 11/24/2022]
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14
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Nicolas H, Yuan B, Zhang J, Zhang X, Schönhoff M. Cucurbit[8]uril as nanocontainer in a polyelectrolyte multilayer film: a quantitative and kinetic study of guest uptake. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10734-42. [PMID: 26372778 DOI: 10.1021/acs.langmuir.5b02806] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The host-guest chemistry of cucurbit[8]uril (CB[8]) and the layer-by-layer self-assembly technique are combined to obtain a molecular imprinted polyelectrolyte multilayer film for the recognition and binding of a guest molecule. Cucurbit[8]uril as a ready-made binding site is first associated with a polyelectrolyte and then assembled into a polyelectrolyte multilayer film via layer-by-layer deposition. A cationic guest is subsequently included into the nanocontainer due to specific host-guest interactions. The quantitative analysis of both CB[8] and the included guest molecule in dependence of the surface charge of the multilayer film identifies a high nanocontainer density as well as good to excellent binding efficiencies, therefore yielding a promising imprinted nanomaterial with potential applications in filtration or sensor technology. The investigation of the guest molecule uptake kinetics reveals two processes on different time scales, respectively, which are again related to the charge of the multilayer film surface. The combination of the results obtained from both ultraviolet spectroscopy and dissipative quartz crystal microbalance enables us to describe a full picture of several simultaneous processes initiated by the guest molecule.
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Affiliation(s)
- Henning Nicolas
- Institute of Physical Chemistry, University of Muenster , Corrensstrasse 28/30, 48149 Münster, Germany
| | - Bin Yuan
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Jiawei Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, P. R. China
| | - Monika Schönhoff
- Institute of Physical Chemistry, University of Muenster , Corrensstrasse 28/30, 48149 Münster, Germany
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Zhang Q, An Q, Luan X, Huang H, Li X, Meng Z, Tong W, Chen X, Chu PK, Zhang Y. Achieving significantly enhanced visible-light photocatalytic efficiency using a polyelectrolyte: the composites of exfoliated titania nanosheets, graphene, and poly(diallyl-dimethyl-ammonium chloride). NANOSCALE 2015; 7:14002-14009. [PMID: 26235909 DOI: 10.1039/c5nr03256c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A high-performance visible-light-active photocatalyst is prepared using the polyelectrolyte/exfoliated titania nanosheet/graphene oxide (GO) precursor by flocculation followed by calcination. The polyelectrolyte poly(diallyl-dimethyl-ammonium chloride) serves not only as an effective binder to precipitate GO and titania nanosheets, but also boosts the overall performance of the catalyst significantly. Unlike most titania nanosheet-based catalysts reported in the literature, the composite absorbs light in the UV-Vis-NIR range. Its decomposition rate of methylene blue is 98% under visible light. This novel strategy of using a polymer to enhance the catalytic performance of titania nanosheet-based catalysts affords immense potential in designing and fabricating next-generation photocatalysts with high efficiency.
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Affiliation(s)
- Qian Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, P.R. China.
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16
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Lv F, Xu L, Zhang Y, Meng Z. Layered Double Hydroxide Assemblies with Controllable Drug Loading Capacity and Release Behavior as well as Stabilized Layer-by-Layer Polymer Multilayers. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19104-19111. [PMID: 26237052 DOI: 10.1021/acsami.5b04569] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A stable drug release system with magnetic targeting is essential in a drug delivery system. In the present work, layered double hydroxide assemblies stabilized by layer-by-layer polymer multilayers were prepared by alternative deposition of poly(allylamine hydrochloride) and poly(acrylic acid) species on composite particles of Fe3O4 and ZnAl-LDH and then covalent cross-linkage of the polymer multilayers by photosensitive cross-linker. The successful fabrication was recorded by Zeta potential and Fourier transform infrared spectrum measurements. The formed assemblies were stable in high pH solutions (pH > 7). The drug loading capacity and release behavior of the assemblies could be controlled by treatment with appropriate acidic solution, and were confirmed by loading and release of a simulated drug, methylene blue. The formed assemblies possessed enough saturated magnetic strength and were sensitive to external magnetic field which was essential for targeting drug delivery. The formed assemblies were multifunctional assemblies with great potential as drug delivery system.
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Affiliation(s)
- Fengzhu Lv
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing, 100083, China
| | - Linan Xu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing, 100083, China
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing, 100083, China
| | - Zilin Meng
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences , Beijing, 100083, China
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17
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Duan Y, An Q, Zhang Q, Zhang Y. Smoothing of fast assembled layer-by-layer films by adjusting assembly conditions. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-4414-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Liu X, Zhao K, Jiang C, Wang Y, Shao L, Zhang Y, Shi F. Introducing a high gravity field to enhance infiltration of small molecules into polyelectrolyte multilayers. SOFT MATTER 2015; 11:5748-5753. [PMID: 26086776 DOI: 10.1039/c5sm01055a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Loading functional small molecules into nano-thin films is fundamental to various research fields such as membrane separation, molecular imprinting, interfacial reaction, drug delivery etc. Currently, a general demand for enhancing the loading rate without affecting the film structures exists in most infiltration phenomena. To handle this issue, we have introduced a process intensification method of a high gravity technique, which is a versatile energy form of mechanical field well-established in industry, into the investigations on diffusion/infiltration at the molecular level. By taking a polyelectrolyte multilayer as a model thin film and a photo-reactive molecule, 4,4'-diazostilbene-2,2'-disulfonic acid disodium salt (DAS), as a model small functional molecule, we have demonstrated remarkably accelerated adsorption/infiltration of DAS into a poly(allylamine hydrochloride) (PAH)/poly(acrylic acid) (PAA) multilayer by as high as 20-fold; meanwhile, both the film property of the multilayer and photoresponsive-crosslinking function of DAS were not disturbed. Furthermore, the infiltration of DAS and the surface morphology of the multilayer could be tuned based on their high dependence on the intensity of the high gravity field regarding different rotating speeds. The mechanism of the accelerated adsorption/infiltration under the high gravity field was interpreted by the increased turbulence of the diffusing layer with the thinned laminar boundary layer and the stepwise delivery of the local concentration gradient from the solution to the interior of the multilayer. The introduction of mechanical field provides a simple and versatile strategy to address the paradox of the contradictory loading amount and loading rate, and thus to promote applications of various membrane processes.
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Affiliation(s)
- Xiaolin Liu
- State Key Laboratory of Organic-Inorganic Composites & Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers, Beijing University of Chemical Technology, Beijing, China.
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Li Y, An Q, Hu Y, Luan X, Zhang Q, Zhang T, Zhang Y. A facile method for the construction of covalently cross-linked layered double hydroxides layer-by-layer films: Enhanced stability and delayed release of guests. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Liu Y, Cao B, Jia P, An J, Luo C, Ma L, Chang J, Pan K. Layer-by-Layer Surface Molecular Imprinting on Polyacrylonitrile Nanofiber Mats. J Phys Chem A 2015; 119:6661-7. [DOI: 10.1021/acs.jpca.5b02325] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuxuan Liu
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Bing Cao
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Peng Jia
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Junhu An
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Chao Luo
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Lijing Ma
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Jiao Chang
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
| | - Kai Pan
- Key Laboratory of Carbon Fiber and Functional
Polymers, Ministry of Education, College of Materials Science and
Engineering, Beijing University of Chemical Technology, Beijing, China 100029
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Jiang C, Luo C, Liu X, Shao L, Dong Y, Zhang Y, Shi F. Adjusting the Ion Permeability of Polyelectrolyte Multilayers through Layer-by-Layer Assembly under a High Gravity Field. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10920-10927. [PMID: 25951984 DOI: 10.1021/acsami.5b02179] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The layer-by-layer (LbL) assembled multilayer has been widely used as good barrier film or capsule due to the advantages of its flexible tailoring of film permeability and compactness. Although many specific systems have been proposed for film design, developing a versatile strategy to control film compactness remains a challenge. We introduced the simple mechanical energy of a high gravity field to the LbL assembly process to tailor the multilayer permeability through adjusting film compactness. By taking poly(diallyldimethylammonium chloride) (PDDA) and poly{1-4[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl sodium salt} (PAzo) as a model system, we investigated the LbL assembly process under a high gravity field. The results showed that the high gravity field introduced effectively accelerated the multilayer deposition process by 20-fold compared with conventional dipping assembly; the adsorption rate was positively dependent on the rotating speed of the high gravity equipment and the concentration of the building block solutions. More interestingly, the film compactness of the PDDA/PAzo multilayer prepared under the high gravity field increased remarkably with the growing rotational speed of the high gravity equipment, as demonstrated through comparisons of surface morphology, cyclic voltammetry curves, and photoisomerization kinetics of PDDA/PAzo multilayers fabricated through the conventional dipping method and through LbL assembly under a high gravity field, respectively. In this way, we have introduced a simple and versatile external form of mechanical energy into the LbL assembling process to improve film compactness, which should be useful for further applications in controlled ion permeability, anticorrosion, and drug loading.
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Affiliation(s)
| | | | | | | | - Youqing Dong
- §College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027 China
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Nie K, An Q, Tao S, Zhang Z, Luan X, Zhang Q, Zhang Y. Layer-by-layer reduced graphene oxide (rGO)/gold nanosheets (AuNSs) hybrid films: significantly enhanced photothermal transition effect compared with rGO or AuNSs films. RSC Adv 2015. [DOI: 10.1039/c5ra07647a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The photothermal effects of layer-by-layer AuNS (gold nanosheets)/rGO hybrid films outperformed that of rGO or AuNSs films under NIR irradiation.
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Affiliation(s)
- Kun Nie
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
| | - Shengyang Tao
- Department of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Zepeng Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
| | - Xinglong Luan
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
| | - Qian Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing
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Wang Y, An Q, Zhou Y, Niu Y, Akram R, Zhang Y, Shi F. Post-infiltration and subsequent photo-crosslinking strategy for layer-by-layer fabrication of stable dendrimers enabling repeated loading and release of hydrophobic molecules. J Mater Chem B 2015; 3:562-569. [DOI: 10.1039/c4tb01688b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed a method that simultaneously utilize covalent interlayer linkages and drug reservoirs to construct LbL multilayers which can repeatedly load and slow release model drugs.
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Affiliation(s)
- Yue Wang
- State Key Laboratory of Chemical Resource Engineering & Key Laboratory of Carbon Fiber and Functional Polymer
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Qi An
- School of Materials Science and Technology
- China University of Geoscience (Beijing)
- Beijing 100083
- China
| | - Yong Zhou
- State Key Laboratory of Chemical Resource Engineering & Key Laboratory of Carbon Fiber and Functional Polymer
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Yue Niu
- State Key Laboratory of Chemical Resource Engineering & Key Laboratory of Carbon Fiber and Functional Polymer
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Raheel Akram
- State Key Laboratory of Chemical Resource Engineering & Key Laboratory of Carbon Fiber and Functional Polymer
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Yihe Zhang
- School of Materials Science and Technology
- China University of Geoscience (Beijing)
- Beijing 100083
- China
| | - Feng Shi
- State Key Laboratory of Chemical Resource Engineering & Key Laboratory of Carbon Fiber and Functional Polymer
- Ministry of Education
- Beijing University of Chemical Technology
- Beijing 100029
- China
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Liu X, Luo C, Jiang C, Shao L, Zhang Y, Shi F. Rapid multilayer construction on a non-planar substrate by layer-by-layer self-assembly under high gravity. RSC Adv 2014. [DOI: 10.1039/c4ra11048j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Wang P, Zhang A, Jin Y, Zhang Q, Zhang L, Peng Y, Du S. Molecularly imprinted layer-coated hollow polysaccharide microcapsules toward gate-controlled release of water-soluble drugs. RSC Adv 2014. [DOI: 10.1039/c4ra04444d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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