51
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Ji M, Dawadi MB, LaSalla AR, Sun Y, Modarelli DA, Parquette JR. Strategy for the Co-Assembly of Co-Axial Nanotube-Polymer Hybrids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9129-9136. [PMID: 28805395 DOI: 10.1021/acs.langmuir.7b02245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanostructured materials having multiple, discrete domains of sorted components are particularly important to create efficient optoelectronics. The construction of multicomponent nanostructures from self-assembled components is exceptionally challenging due to the propensity of noncovalent materials to undergo structural reorganization in the presence of excipient polymers. This work demonstrates that polymer-nanotube composites comprised of a self-assembled nanotube wrapped with two conjugated polymers could be assembled using a layer-by-layer approach. The polymer-nanotube nanostructures arrange polymer layers coaxially on the nanotube surface. Femtosecond transient absorption (TA) studies indicated that the polymer-nanotube composites undergo photoinduced charge separation upon excitation of the NDI chromophore within the nanotube.
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Affiliation(s)
- Mingyang Ji
- Department of Chemistry, The Ohio State University , 100 W. 18th Avenue Columbus, Ohio 43210, United States
| | - Mahesh B Dawadi
- Department of Chemistry and The Center for Laser and Optical Spectroscopy, Knight Chemical Laboratory, The University of Akron , Akron, Ohio 44325-3601, United States
| | - Alexandria R LaSalla
- Department of Chemistry, The Ohio State University , 100 W. 18th Avenue Columbus, Ohio 43210, United States
| | - Yuan Sun
- Department of Chemistry, The Ohio State University , 100 W. 18th Avenue Columbus, Ohio 43210, United States
| | - David A Modarelli
- Department of Chemistry and The Center for Laser and Optical Spectroscopy, Knight Chemical Laboratory, The University of Akron , Akron, Ohio 44325-3601, United States
| | - Jon R Parquette
- Department of Chemistry, The Ohio State University , 100 W. 18th Avenue Columbus, Ohio 43210, United States
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52
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Lísal M, Šindelka K, Suchá L, Limpouchová Z, Procházka K. Dissipative particle dynamics simulations of polyelectrolyte self-assemblies. Methods with explicit electrostatics. POLYMER SCIENCE SERIES C 2017. [DOI: 10.1134/s1811238217010052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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53
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Hill JD, Millett PC. Numerical Simulations of Directed Self-Assembly in Diblock Copolymer Films using Zone Annealing and Pattern Templating. Sci Rep 2017; 7:5250. [PMID: 28701696 PMCID: PMC5507907 DOI: 10.1038/s41598-017-05565-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 05/30/2017] [Indexed: 12/03/2022] Open
Abstract
Bulk fabrication of surface patterns with sub-20 nm feature sizes is immensely desirable for many existing and emerging technologies. Directed self-assembly (DSA) of block copolymers (BCPs) has been a recently demonstrated approach to achieve such feature resolution over large-scale areas with minimal defect populations. However, much work remains to understand and optimize DSA methods in order to move this field forward. This paper presents large-scale numerical simulations of zone annealing and chemo-epitaxy processing of BCP films to achieve long-range orientational order. The simulations utilize a Time-Dependent Ginzburg-Landau model and parallel processing to elucidate relationships between the magnitude and velocity of a moving thermal gradient and the resulting BCP domain orientations and defect densities. Additional simulations have been conducted to study to what degree orientational order can be further improved by combining zone annealing and chemo-epitaxy techniques. It is found that these two DSA methods do synergistically enhance long-range order with a particular relationship between thermal gradient velocity and chemical template spacing.
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Affiliation(s)
- Joseph D Hill
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Paul C Millett
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
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54
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Tan SF, Chee SW, Lin G, Mirsaidov U. Direct Observation of Interactions between Nanoparticles and Nanoparticle Self-Assembly in Solution. Acc Chem Res 2017; 50:1303-1312. [PMID: 28485945 DOI: 10.1021/acs.accounts.7b00063] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Hierarchically organized nanoparticles (NPs) possess unique properties and are relevant to various technological applications. An important "bottom-up" strategy for building such hierarchical nanostructures is to guide the individual NPs into ordered nanoarchitectures using intermolecular interactions and external forces. However, our current understanding of the nanoscale interactions that govern such self-assembly processes usually relies on post-synthesis/assembly or indirect characterization. Theoretical models that can derive these interactions are presently constrained to systems with only a few particles or on short time scales. Hence, except for a number of special cases, a description that captures the detailed mechanisms of NP self-assembly still eludes us. By imaging the assembly of NPs in solution with subnanometer resolution and in real-time, in situ liquid cell transmission electron microscopy (LC-TEM) can identify previously unknown intermediate stages and improve our understanding of such processes. Here, we review recent studies where we explored NP self-assembly at different organization length scales using LC-TEM: (1) we followed the transformation of atoms into crystalline NPs in solution, (2) we highlighted the role of solvation forces on interaction dynamics between NPs, and (3) we described the assembly dynamics of NPs in solution. In the case of nanocrystal nucleation, we identified the existence of three distinct steps that lead to the formation of crystalline nuclei in solution. These steps are spinodal decomposition of the precursor solution into solute-rich and solute-poor liquid phases, nucleation of amorphous clusters within the solute-rich liquid phase, followed by crystallization of these amorphous clusters into crystalline NPs. The next question we ask is how NPs interact in solution once they form. It turns out that the hydration layer surrounding each NP acts as a repulsive barrier that prevents NPs from readily attaching to each other due to attractive vdW forces. Consequently, two interacting NPs form a metastable pair separated by their one water molecule thick hydration shell and they undergo attachment only when this water between them is drained. Next, we explore the self-assembly of many NP systems where the formation of linear chains from spherical NPs or nanorods (NRs) is mediated by linker molecules. At low linker concentration, both spherical NPs and NRs tend to form linear chains because of the need to reduce electrostatic repulsion between NP building blocks. When the concentration of linkers is increased, the attachment of NPs is no longer linear. For example, we find that two NRs undergo side-to-side assembly due to decreased electrostatic repulsion and the anisotropic distribution of linkers on NR surfaces at high linker concentration. Lastly, we look at the formation of NP nanorings directed by ethylenediaminetetraacetic acid (EDTA) nanodroplets in water. Our study shows that nanoring assemblies form via sequential attachment of NPs to binding sites located along the circumference of the EDTA nanodroplet, followed by rearrangement and reorientation of the attached NPs. Our approach based on real-time visualization of nanoscale processes not only reveals all the intermediate steps of NP assembly, but also provides quantitative description on the interactions between nanoscale objects in solution.
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Affiliation(s)
- Shu Fen Tan
- Department
of Physics, National University of Singapore, 117551 Singapore
- Centre
for BioImaging Sciences and Department of Biological Sciences, National University of Singapore, 117557 Singapore
| | - See Wee Chee
- Department
of Physics, National University of Singapore, 117551 Singapore
- Centre
for BioImaging Sciences and Department of Biological Sciences, National University of Singapore, 117557 Singapore
- Centre
for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 117546 Singapore
| | - Guanhua Lin
- Department
of Physics, National University of Singapore, 117551 Singapore
- Centre
for BioImaging Sciences and Department of Biological Sciences, National University of Singapore, 117557 Singapore
- Centre
for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 117546 Singapore
- NUSNNI-NanoCore, National University of Singapore, 117411 Singapore
| | - Utkur Mirsaidov
- Department
of Physics, National University of Singapore, 117551 Singapore
- Centre
for BioImaging Sciences and Department of Biological Sciences, National University of Singapore, 117557 Singapore
- Centre
for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 117546 Singapore
- NUSNNI-NanoCore, National University of Singapore, 117411 Singapore
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55
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Cao XZ, Merlitz H, Wu CX. Tuning Adsorption Duration To Control the Diffusion of a Nanoparticle in Adsorbing Polymers. J Phys Chem Lett 2017; 8:2629-2633. [PMID: 28535343 DOI: 10.1021/acs.jpclett.7b01049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Controlling the nanoparticle (NP) diffusion in polymers is a prerequisite to obtain polymer nanocomposites (PNCs) with desired dynamical and rheological properties and to achieve targeted delivery of nanomedicine in biological systems. Here we determine the suppression mechanism of direct NP-polymer attraction to hamper the NP mobility in adsorbing polymers and then quantify the dependence of the effective viscosity ηeff felt by the NP on the adsorption duration τads of polymers on the NP using scaling theory analysis and molecular dynamics simulations. We propose and confirm that participation of adsorbed chains in the NP motion break up at time intervals beyond τads due to the rearrangement of polymer segments at the NP surface, which accounts for the onset of Fickian NP diffusion on a time scale of t ≈ τads. We develop a power law, ηeff ∼ (τads)ν, where ν is the scaling exponent of the dependence of polymer coil size on the chain length, which leads to a theoretical basis for the design of PNCs and nanomedicine with desired applications through tuning the polymer adsorption duration.
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Affiliation(s)
- Xue-Zheng Cao
- Department of Physics, Zhejiang Sci-Tech University , Hangzhou 310018, P. R. China
- Department of Chemistry, University of North Carolina , Chapel Hill, North Carolina 27599, United States
| | - Holger Merlitz
- Department of Physics, Xiamen University , Xiamen 361005, P. R. China
- Leibniz-Institut für Polymerforschung Dresden , 01069 Dresden, Germany
| | - Chen-Xu Wu
- Department of Physics, Xiamen University , Xiamen 361005, P. R. China
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56
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Šindelka K, Limpouchová Z, Štěpánek M, Procházka K. Stabilization of coated inorganic nanoparticles by amphiphilic copolymers in aqueous media. Dissipative particle dynamics study. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4090-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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57
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Au TH, Trinh DT, Tong QC, Do DB, Nguyen DP, Phan MH, Lai ND. Direct Laser Writing of Magneto-Photonic Sub-Microstructures for Prospective Applications in Biomedical Engineering. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E105. [PMID: 28486409 PMCID: PMC5449986 DOI: 10.3390/nano7050105] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 05/02/2017] [Accepted: 05/04/2017] [Indexed: 11/18/2022]
Abstract
We report on the fabrication of desired magneto-photonic devices by a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a photocurable nanocomposite consisting of magnetite ( Fe 3 O 4 ) nanoparticles and a commercial SU-8 photoresist. The magnetic nanocomposite was synthesized by mixing Fe 3 O 4 nanoparticles with different kinds of SU-8 photoresists. We demonstrated that the degree of dispersion of Fe 3 O 4 nanoparticles in the nanocomposite depended on the concentration of Fe 3 O 4 nanoparticles, the viscosity of SU-8 resist, and the mixing time. By tuning these parameters, the most homogeneous magnetic nanocomposite was obtained with a concentration of about 2 wt % of Fe 3 O 4 nanoparticles in SU-8 2005 photoresist for the mixing time of 20 days. The LOPA-based DLW technique was employed to fabricate on demand various magneto-photonic submicrometer structures, which are similar to those obtained without Fe 3 O 4 nanoparticles. The magneto-photonic 2D and 3D structures with sizes as small as 150 nm were created. We demonstrated the strong magnetic field responses of the magneto-photonic nanostructures and their use as micro-actuators when immersed in a liquid solution.
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Affiliation(s)
- Thi Huong Au
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, École Normale Supérieure de Cachan, Centrale Supélec, CNRS, Université Paris-Saclay, 61 avenue de Président Wilson, 94235 Cachan, France.
| | - Duc Thien Trinh
- Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, 100000 Hanoi, Vietnam.
| | - Quang Cong Tong
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, École Normale Supérieure de Cachan, Centrale Supélec, CNRS, Université Paris-Saclay, 61 avenue de Président Wilson, 94235 Cachan, France.
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, 100000 Hanoi, Vietnam.
| | - Danh Bich Do
- Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, 100000 Hanoi, Vietnam.
| | - Dang Phu Nguyen
- Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, 100000 Hanoi, Vietnam.
| | - Manh-Huong Phan
- Department of Physics, University of South Florida, Tampa, FL 33620, USA.
| | - Ngoc Diep Lai
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, École Normale Supérieure de Cachan, Centrale Supélec, CNRS, Université Paris-Saclay, 61 avenue de Président Wilson, 94235 Cachan, France.
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58
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Berezkin AV, Kudryavtsev YV, Gorkunov MV, Osipov MA. Ordering of anisotropic nanoparticles in diblock copolymer lamellae: Simulations with dissipative particle dynamics and a molecular theory. J Chem Phys 2017; 146:144902. [DOI: 10.1063/1.4979897] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Anatoly V. Berezkin
- Technische Universität München, James-Franck-Str. 1, 85747 Garching, Germany
| | - Yaroslav V. Kudryavtsev
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prosp. 29, 119991 Moscow, Russia
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119071 Moscow, Russia
| | - Maxim V. Gorkunov
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, Leninsky Prosp. 59, 119333 Moscow, Russia
| | - Mikhail A. Osipov
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prosp. 29, 119991 Moscow, Russia
- Department of Mathematics, University of Strathclyde, Glasgow G1 1XH, Scotland, United Kingdom
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59
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Xu G, Huang Z, Chen P, Cui T, Zhang X, Miao B, Yan LT. Optimal Reactivity and Improved Self-Healing Capability of Structurally Dynamic Polymers Grafted on Janus Nanoparticles Governed by Chain Stiffness and Spatial Organization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1603155. [PMID: 28092430 DOI: 10.1002/smll.201603155] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/04/2016] [Indexed: 06/06/2023]
Abstract
Structurally dynamic polymers are recognized as a key potential to revolutionize technologies ranging from design of self-healing materials to numerous biomedical applications. Despite intense research in this area, optimizing reactivity and thereby improving self-healing ability at the most fundamental level pose urgent issue for wider applications of such emerging materials. Here, the authors report the first mechanistic investigation of the fundamental principle for the dependence of reactivity and self-healing capabilities on the properties inherent to dynamic polymers by combining large-scale computer simulation, theoretical analysis, and experimental discussion. The results allow to reveal how chain stiffness and spatial organization regulate reactivity of dynamic polymers grafted on Janus nanoparticles and mechanically mediated reaction in their reverse chemistry, and, particularly, identify that semiflexible dynamic polymers possess the optimal reactivity and self-healing ability. The authors also develop an analytical model of blob theory of polymer chains to complement the simulation results and reveal essential scaling laws for optimal reactivity. The findings offer new insights into the physical mechanism in various systems involving reverse/dynamic chemistry. These studies highlight molecular engineering of polymer architecture and intrinsic property as a versatile strategy in control over the structural responses and functionalities of emerging materials with optimized self-healing capabilities.
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Affiliation(s)
- Guoxi Xu
- Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Zihan Huang
- Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Pengyu Chen
- Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Tianqi Cui
- Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Xinghua Zhang
- School of Science, Beijing Jiaotong University, Beijing, 100044, China
| | - Bing Miao
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Li-Tang Yan
- Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
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60
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Tan SF, Anand U, Mirsaidov U. Interactions and Attachment Pathways between Functionalized Gold Nanorods. ACS NANO 2017; 11:1633-1640. [PMID: 28117977 DOI: 10.1021/acsnano.6b07398] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanoparticle (NP) self-assembly has been recognized as an important technological process for forming ordered nanostructures. However, the detailed dynamics of the assembly processes remain poorly understood. Using in situ liquid cell transmission electron microscopy, we describe the assembly modes of gold (Au) nanorods (NRs) in solution mediated by hydrogen bonding between NR-bound cysteamine linker molecules. Our observations reveal that by tuning the linker concentration, two different NR assembly modes can be achieved. These assembly modes proceed via the (1) end-to-end and (2) side-to-side attachment of NRs at low and high linker concentrations in solution, respectively. In addition, our time-resolved observations reveal that the side-to-side NR assemblies can occur through two different pathways: (i) prealigned attachment, where two Au NRs prealign to be parallel prior to assembly, and (ii) postattachment alignment, where two Au NRs first undergo end-to-end attachment and pivot around the attachment point to form the side-to-side assembly. We attributed the observed assembly modes to the distribution of linkers on the NR surfaces and the electrostatic interactions between the NRs. The intermediate steps in the assembly reported here reveal how the shape and surface functionalities of NPs drive their self-assembly, which is important for the rational design of hierarchical nanostructures.
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Affiliation(s)
- Shu Fen Tan
- Department of Physics, National University of Singapore , 117551 Singapore
- Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore , 117557 Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore , 117546 Singapore
| | - Utkarsh Anand
- Department of Physics, National University of Singapore , 117551 Singapore
- Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore , 117557 Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore , 117546 Singapore
- NUSNNI-NanoCore, National University of Singapore , 117411 Singapore
| | - Utkur Mirsaidov
- Department of Physics, National University of Singapore , 117551 Singapore
- Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore , 117557 Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore , 117546 Singapore
- NUSNNI-NanoCore, National University of Singapore , 117411 Singapore
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61
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Zhao K, Wang X, Chen T, Wu H, Li J, Yang B, Li D, Wei J. Bisphenol A Adsorption Properties of Mesoporous CaSiO3@SiO2 Grafted Nonwoven Polypropylene Fiber. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b03015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kongyin Zhao
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Xiaohui Wang
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Tian Chen
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Hui Wu
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Jingang Li
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Bingxing Yang
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Dongying Li
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Junfu Wei
- State
Key Laboratory of Separation Membranes and Membrane Processes and ‡School of Material
Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
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62
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Chen P, Yang Y, Dong B, Huang Z, Zhu G, Cao Y, Yan LT. Polymerization-Induced Interfacial Self-Assembly of Janus Nanoparticles in Block Copolymers: Reaction-Mediated Entropy Effects, Diffusion Dynamics, and Tailorable Micromechanical Behaviors. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pengyu Chen
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Ye Yang
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Bojun Dong
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zihan Huang
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Guolong Zhu
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Yufei Cao
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- Key Laboratory of Advanced
Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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63
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Zaragoza J, Chang A, Asuri P. Effect of crosslinker length on the elastic and compression modulus of poly(acrylamide) nanocomposite hydrogels. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/790/1/012037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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64
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65
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Wang W, Hou G, Zheng Z, Wang L, Liu J, Wu Y, Zhang L, Lyulin AV. Designing polymer nanocomposites with a semi-interpenetrating or interpenetrating network structure: toward enhanced mechanical properties. Phys Chem Chem Phys 2017; 19:15808-15820. [DOI: 10.1039/c7cp01453h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Semi-interpenetrating and interpenetrating network structures for the uniform dispersion of NPs and the reinforced mechanical properties of polymer nanocomposites.
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Affiliation(s)
- Wenhui Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Guanyi Hou
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Zijian Zheng
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Lu Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Alexey V. Lyulin
- Group Theory of Polymers and Soft Matter
- Department of Applied Physics
- Technische Universiteit Eindhoven
- Eindhoven
- The Netherlands
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66
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67
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Chen Y, Liu J, Liu L, Han H, Xu Q, Qian X. Tailoring the alignment of string-like nanoparticle assemblies in a functionalized polymer matrix via steady shear. RSC Adv 2017. [DOI: 10.1039/c6ra28060a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work reports the steady shear induced aligning behaviour of nanoparticle strings in a functionalized polymer matrix.
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Affiliation(s)
- Yulong Chen
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Jun Liu
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Li Liu
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Huanre Han
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Qian Xu
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Xin Qian
- College of Materials Science and Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
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68
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Huang XW, Peng Y, Huang JH, Luo MB. A study on the diffusivity of polymers in crowded environments with periodically distributed nanoparticles. Phys Chem Chem Phys 2017; 19:29975-29983. [DOI: 10.1039/c7cp05514e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel diffusion behaviors of polymers at low temperature: a minimum at an intermediate inter-particle distance and oscillation with polymer length.
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Affiliation(s)
- Xiao-Wei Huang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yi Peng
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Jian-Hua Huang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Meng-Bo Luo
- Department of Physics
- Zhejiang University
- Hangzhou 310027
- China
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69
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Tiwari SK, Verma K, Saren P, Oraon R, De Adhikari A, Nayak GC, Kumar V. Manipulating selective dispersion of reduced graphene oxide in polycarbonate/nylon 66 based blend nanocomposites for improved thermo-mechanical properties. RSC Adv 2017. [DOI: 10.1039/c7ra02044a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Selective dispersion of rGO in PC/nylon blend by varying mixing sequence of rGO during melt mixing.
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Affiliation(s)
- Santosh Kr. Tiwari
- Department of Applied Chemistry
- Indian Institute of Technology (ISM)
- Dhanbad
- India
| | - Kartikey Verma
- Department of Applied Physics
- Chandigarh University
- Mohali
- India
| | - Pupulata Saren
- Department of Applied Chemistry
- Indian Institute of Technology (ISM)
- Dhanbad
- India
| | - Ramesh Oraon
- Department of Applied Chemistry
- Indian Institute of Technology (ISM)
- Dhanbad
- India
| | - Amrita De Adhikari
- Department of Applied Chemistry
- Indian Institute of Technology (ISM)
- Dhanbad
- India
| | | | - Vijay Kumar
- Department of Applied Physics
- Chandigarh University
- Mohali
- India
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70
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Thorkelsson K, Bronstein N, Xu T. Nanorod-Based Supramolecular Nanocomposites: Effects of Nanorod Length. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01145] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Ting Xu
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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71
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Wang Z, Zheng Z, Liu J, Wu Y, Zhang L. Tuning the Mechanical Properties of Polymer Nanocomposites Filled with Grafted Nanoparticles by Varying the Grafted Chain Length and Flexibility. Polymers (Basel) 2016; 8:E270. [PMID: 30974590 PMCID: PMC6432372 DOI: 10.3390/polym8090270] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/30/2016] [Accepted: 07/19/2016] [Indexed: 12/29/2022] Open
Abstract
By employing coarse-grained molecular dynamics simulation, we simulate the spatial organization of the polymer-grafted nanoparticles (NPs) in homopolymer matrix and the resulting mechanical performance, by particularly regulating the grafted chain length and flexibility. The morphologies ranging from the agglomerate, cylinder, sheet, and string to full dispersion are observed, by gradually increasing the grafted chain length. The radial distribution function and the total interaction energy between NPs are calculated. Meanwhile, the stress⁻strain behavior of each morphology and the morphological evolution during the uniaxial tension are simulated. In particular, the sheet structure exhibits the best mechanical reinforcement compared to other morphologies. In addition, the change of the grafted chain flexibility to semi-flexibility leads to the variation of the morphology. We also find that at long grafted chain length, the stress⁻strain behavior of the system with the semi-flexible grafted chain begins to exceed that of the system with the flexible grafted chain, attributed to the physical inter-locking interaction between the matrix and grafted polymer chains. A similar transition trend is as well found in the presence of the interfacial chemical couplings between grafted and matrix polymer chains. In general, this work is expected to help to design and fabricate high performance polymer nanocomposites filled with grafted NPs with excellent and controllable mechanical properties.
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Affiliation(s)
- Zixuan Wang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, China.
| | - Zijian Zheng
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing 100029, China.
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing 100029, China.
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing 100029, China.
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing 100029, China.
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
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72
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Boles MA, Engel M, Talapin DV. Self-Assembly of Colloidal Nanocrystals: From Intricate Structures to Functional Materials. Chem Rev 2016; 116:11220-89. [PMID: 27552640 DOI: 10.1021/acs.chemrev.6b00196] [Citation(s) in RCA: 1043] [Impact Index Per Article: 130.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chemical methods developed over the past two decades enable preparation of colloidal nanocrystals with uniform size and shape. These Brownian objects readily order into superlattices. Recently, the range of accessible inorganic cores and tunable surface chemistries dramatically increased, expanding the set of nanocrystal arrangements experimentally attainable. In this review, we discuss efforts to create next-generation materials via bottom-up organization of nanocrystals with preprogrammed functionality and self-assembly instructions. This process is often driven by both interparticle interactions and the influence of the assembly environment. The introduction provides the reader with a practical overview of nanocrystal synthesis, self-assembly, and superlattice characterization. We then summarize the theory of nanocrystal interactions and examine fundamental principles governing nanocrystal self-assembly from hard and soft particle perspectives borrowed from the comparatively established fields of micrometer colloids and block copolymer assembly. We outline the extensive catalog of superlattices prepared to date using hydrocarbon-capped nanocrystals with spherical, polyhedral, rod, plate, and branched inorganic core shapes, as well as those obtained by mixing combinations thereof. We also provide an overview of structural defects in nanocrystal superlattices. We then explore the unique possibilities offered by leveraging nontraditional surface chemistries and assembly environments to control superlattice structure and produce nonbulk assemblies. We end with a discussion of the unique optical, magnetic, electronic, and catalytic properties of ordered nanocrystal superlattices, and the coming advances required to make use of this new class of solids.
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Affiliation(s)
- Michael A Boles
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Michael Engel
- Institute for Multiscale Simulation, Friedrich-Alexander University Erlangen-Nürnberg , 91052 Erlangen, Germany.,Department of Chemical Engineering, University of Michigan , Ann Arbor, Michigan 48109, United States
| | - Dmitri V Talapin
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States.,Center for Nanoscale Materials, Argonne National Lab , Argonne, Illinois 60439, United States
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73
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He L, Dong Z, Zhang L. Selective adsorption behavior of polymer at the polymer-nanoparticle interface. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Linli He
- Department of Physics; Wenzhou University; Wenzhou 325035 People's Republic of China
| | - Zhang Dong
- Department of Physics; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Linxi Zhang
- Department of Physics; Zhejiang University; Hangzhou 310027 People's Republic of China
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74
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Cao XZ, Merlitz H, Wu CX, Ungar G, Sommer JU. A theoretical study of dispersion-to-aggregation of nanoparticles in adsorbing polymers using molecular dynamics simulations. NANOSCALE 2016; 8:6964-6968. [PMID: 26965335 DOI: 10.1039/c5nr08576d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The properties of polymer-nanoparticle (NP) mixtures significantly depend on the dispersion of the NPs. Using molecular dynamics simulations, we demonstrate that, in the presence of polymer-NP attraction, the dispersion of NPs in semidilute and concentrated polymers can be stabilized by increasing the polymer concentration. A lower polymer concentration facilitates the aggregation of NPs bridged by polymer chains, as well as a further increase of the polymer-NP attraction. Evaluating the binding of NPs through shared polymer segments in an adsorption blob, we derive a linear relationship between the polymer concentration and the polymer-NP attraction at the phase boundary between dispersed and aggregated NPs. Our theoretical findings are directly relevant for understanding and controlling many self-assembly processes that use either dispersion or aggregation of NPs to yield the desired materials.
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Affiliation(s)
- Xue-Zheng Cao
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China.
| | - Holger Merlitz
- Department of Physics and ITPA, Xiamen University, Xiamen 361005, P.R. China and Leibniz-Institut für Polymerforschung Dresden, 01069 Dresden, Germany
| | - Chen-Xu Wu
- Department of Physics and ITPA, Xiamen University, Xiamen 361005, P.R. China
| | - Goran Ungar
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, P.R. China. and Department of Engineering Materials University of Sheffield Mappin Street, Sheffield S1 3JD, UK
| | - Jens-Uwe Sommer
- Leibniz-Institut für Polymerforschung Dresden, 01069 Dresden, Germany and Technische Universität Dresden, Institute of Theoretical Physics, D-01069 Dresden, Germany
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75
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A New Self-Consistent Field Model of Polymer/Nanoparticle Mixture. Sci Rep 2016; 6:20355. [PMID: 26829174 PMCID: PMC4734332 DOI: 10.1038/srep20355] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 12/30/2015] [Indexed: 01/04/2023] Open
Abstract
Field-theoretical method is efficient in predicting assembling structures of polymeric systems. However, it’s challenging to generalize this method to study the polymer/nanoparticle mixture due to its multi-scale nature. Here, we develop a new field-based model which unifies the nanoparticle description with the polymer field within the self-consistent field theory. Instead of being “ensemble-averaged” continuous distribution, the particle density in the final morphology can represent individual particles located at preferred positions. The discreteness of particle density allows our model to properly address the polymer-particle interface and the excluded-volume interaction. We use this model to study the simplest system of nanoparticles immersed in the dense homopolymer solution. The flexibility of tuning the interfacial details allows our model to capture the rich phenomena such as bridging aggregation and depletion attraction. Insights are obtained on the enthalpic and/or entropic origin of the structural variation due to the competition between depletion and interfacial interaction. This approach is readily extendable to the study of more complex polymer-based nanocomposites or biology-related systems, such as dendrimer/drug encapsulation and membrane/particle assembly.
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76
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Chaykar AS, Goharpey F, Yeganeh JK. Volume phase transition of electron beam cross-linked thermo-responsive PVME nanogels in the presence and absence of nanoparticles: with a view toward rheology and interactions. RSC Adv 2016. [DOI: 10.1039/c5ra21021f] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We investigate the effect of nanoparticles and radiation dose on interactions in the PVME-based nanogel system and its phase behavior (swelling/deswelling behavior and phase separation mechanism) by rheological and FTIR measurements.
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Affiliation(s)
| | - Fatemeh Goharpey
- Department of Polymer Engineering
- Amirkabir University of Technology
- Tehran
- Iran
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77
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Dai S, Zhang J, Zhang T, Huang Z, Quan H, Lu H, Zhao X. Molecular dynamic simulations of the core–shell microsphere of nanosilica grafted by acrylamide acrylic acid copolymer PAMAA: study of its microstructure and interaction between microsphere and additives. NEW J CHEM 2016. [DOI: 10.1039/c5nj03411f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different additives have a remarkable effect on the microstructure of microsphere in aqueous solution.
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Affiliation(s)
- Shanshan Dai
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province
| | - Jinghan Zhang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
| | - Tailiang Zhang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
| | - Zhiyu Huang
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
| | - Hongping Quan
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
| | - Hongsheng Lu
- College of Chemistry and Chemical Engineering
- Southwest Petroleum University
- Chengdu 610500
- China
| | - Xiaowen Zhao
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- 610065 Chengdu
- China
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78
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Zhang X, Cheng J, Zhuo R. Amphiphilic hyperbranched polymers with a biodegradable hyperbranched poly(ε-caprolactone) core prepared from homologous AB2 macromonomer. RSC Adv 2016. [DOI: 10.1039/c6ra08531h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Amphiphilic hyperbranched polymers with biodegradable hyperbranched poly(ε-caprolactone) core were prepared from homologous AB2 macromonomer.
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Affiliation(s)
- Xiaojin Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Juan Cheng
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Renxi Zhuo
- Key Laboratory of Biomedical Polymers of Ministry of Education
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
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79
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Duan ZG, Huang M, Cui W, Cao XZ. Indirect interacting force between nanoparticles within athermal polymers: A Langevin dynamics study. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.09.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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80
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Millett PC. Time-dependent Ginzburg-Landau model for nonfrustrated linear ABC triblock terpolymers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:022602. [PMID: 26382421 DOI: 10.1103/physreve.92.022602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Indexed: 06/05/2023]
Abstract
A time-dependent Ginzburg-Landau (TDGL) model is proposed to simulate the ordering of linear ABC triblock terpolymers. The model, in its current form, is applicable to nonfrustrated triblock systems, with the specific condition that χAC≫χAB≈χBC. Simulations are presented that demonstrate the model's ability to evolve a wide variety of morphologies throughout time, including tetragonal, core-shell hexagonal, three-phase lamellar, and beads-in-lamellar phases. The model also incorporates an interaction term to study templated substrates for directed self-assembly. The efficiency of the TDGL model enables large-scale simulations that allow investigation of self-assembly, and directed self-assembly, processes that may exhibit very small defect concentrations.
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Affiliation(s)
- Paul C Millett
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
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81
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Dong B, Huang Z, Chen H, Yan LT. Chain-Stiffness-Induced Entropy Effects Mediate Interfacial Assembly of Janus Nanoparticles in Block Copolymers: From Interfacial Nanostructures to Optical Responses. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01290] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Bojun Dong
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zihan Huang
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Honglin Chen
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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82
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Kim B, Choi J, Yang S, Yu S, Cho M. Influence of crosslink density on the interfacial characteristics of epoxy nanocomposites. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.01.043] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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83
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Waiczies S, Lepore S, Sydow K, Drechsler S, Ku MC, Martin C, Lorenz D, Schütz I, Reimann HM, Purfürst B, Dieringer MA, Waiczies H, Dathe M, Pohlmann A, Niendorf T. Anchoring dipalmitoyl phosphoethanolamine to nanoparticles boosts cellular uptake and fluorine-19 magnetic resonance signal. Sci Rep 2015; 5:8427. [PMID: 25673047 PMCID: PMC5389132 DOI: 10.1038/srep08427] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 01/15/2015] [Indexed: 01/19/2023] Open
Abstract
Magnetic resonance (MR) methods to detect and quantify fluorine (19F) nuclei provide the opportunity to study the fate of cellular transplants in vivo. Cells are typically labeled with 19F nanoparticles, introduced into living organisms and tracked by 19F MR methods. Background-free imaging and quantification of cell numbers are amongst the strengths of 19F MR-based cell tracking but challenges pertaining to signal sensitivity and cell detection exist. In this study we aimed to overcome these limitations by manipulating the aminophospholipid composition of 19F nanoparticles in order to promote their uptake by dendritic cells (DCs). As critical components of biological membranes, phosphatidylethanolamines (PE) were studied. Both microscopy and MR spectroscopy methods revealed a striking (at least one order of magnitude) increase in cytoplasmic uptake of 19F nanoparticles in DCs following enrichment with 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE). The impact of enriching 19F nanoparticles with PE on DC migration was also investigated. By manipulating the nanoparticle composition and as a result the cellular uptake we provide here one way of boosting 19F signal per cell in order to overcome some of the limitations related to 19F MR signal sensitivity. The boost in signal is ultimately necessary to detect and track cells in vivo.
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Affiliation(s)
- Sonia Waiczies
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Stefano Lepore
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Karl Sydow
- Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Susanne Drechsler
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Min-Chi Ku
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Conrad Martin
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Dorothea Lorenz
- Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Irene Schütz
- Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Henning M Reimann
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Bettina Purfürst
- Electron Microscopy Core Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Matthias A Dieringer
- 1] Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany [2] Experimental and Clinical Research Center, Berlin, Germany
| | | | - Margitta Dathe
- Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Andreas Pohlmann
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Thoralf Niendorf
- Berlin Ultrahigh Field Facility, Max Delbrück Center for Molecular Medicine, Berlin, Germany
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84
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Casalegno M, Kotowski D, Bernardi A, Luzzati S, Po R, Raos G. The effect of donor content on the efficiency of P3HT:PCBM bilayers: optical and photocurrent spectral data analyses. Phys Chem Chem Phys 2015; 17:2447-56. [DOI: 10.1039/c4cp03827d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A numerical analysis of optical absorption and photocurrent data reveals extensive interdiffusion in P3HT:PCBM bilayer devices.
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Affiliation(s)
- Mosé Casalegno
- Dipartimento di Chimica
- Materiali e Ingegneria Chimica “G. Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
| | - Dariusz Kotowski
- Istituto per lo Studio delle Macromolecole
- Consiglio Nazionale delle Ricerche
- 20133 Milano
- Italy
| | - Andrea Bernardi
- Research Center for Non-Conventional Energies
- Istituto ENI Donegani
- Eni S.p.A
- 28100 Novara
- Italy
| | - Silvia Luzzati
- Istituto per lo Studio delle Macromolecole
- Consiglio Nazionale delle Ricerche
- 20133 Milano
- Italy
| | - Riccardo Po
- Research Center for Non-Conventional Energies
- Istituto ENI Donegani
- Eni S.p.A
- 28100 Novara
- Italy
| | - Guido Raos
- Dipartimento di Chimica
- Materiali e Ingegneria Chimica “G. Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
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85
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Cao XZ, Duan ZG, Wang JS, Cui W, Liu YS, Wu CX. Thin polymer-layer decorated, structure adjustable crystals of nanoparticles. Phys Chem Chem Phys 2015; 17:22533-7. [DOI: 10.1039/c5cp01924a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymer chains take a two dimensional thin layer conformation on substrates, instead of being stretched by dense nanoparticles.
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Affiliation(s)
- Xue-Zheng Cao
- Department of Physics
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Zhi-Guang Duan
- Department of Physics
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Jun-Shu Wang
- Department of Physics
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Wei Cui
- Department of Physics and ITPA
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Yong-Song Liu
- Department of Physics
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Chen-Xu Wu
- Department of Physics and ITPA
- Xiamen University
- Xiamen 361005
- P. R. China
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86
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Khademzadeh Yeganeh J, Goharpey F, Moghimi E, Petekidis G, Foudazi R. Manipulating the kinetics and mechanism of phase separation in dynamically asymmetric LCST blends by nanoparticles. Phys Chem Chem Phys 2015; 17:27446-61. [DOI: 10.1039/c5cp04042f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The addition of nanoparticles in dynamically asymmetric LCST blends is used to induce the preferred phase-separating morphology by tuning the dynamic asymmetry, and to control the kinetics of phase separation by slowing down (or even arresting) the domain growth.
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Affiliation(s)
| | - F. Goharpey
- Department of Polymer Engineering
- Amirkabir University of Technology
- Tehran
- Iran
| | - E. Moghimi
- IESL-FORTH and Department of Material Science and Technology
- University of Crete
- GR-711 10 Heraklion
- Greece
| | - G. Petekidis
- IESL-FORTH and Department of Material Science and Technology
- University of Crete
- GR-711 10 Heraklion
- Greece
| | - R. Foudazi
- Department of Chemical and Materials Engineering
- New Mexico State University
- Las Cruces
- USA
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87
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Sarkar B, Alexandridis P. Block copolymer–nanoparticle composites: Structure, functional properties, and processing. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.10.009] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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88
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Yeganeh JK, Goharpey F, Moghimi E, Petekidis G, Foudazi R. Controlling the kinetics of viscoelastic phase separation through self-assembly of spherical nanoparticles or block copolymers. SOFT MATTER 2014; 10:9270-9280. [PMID: 25327550 DOI: 10.1039/c4sm01499e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Viscoelastic phase separation (VPS) can produce a network structure of the minor phase, which needs to be stabilized for designing a heterogeneous structure with desired mechanical and electrical functions. In this work, we investigate the stabilization of the VPS-induced network structure in a dynamically asymmetric PS/PVME blend by incorporation of a SEBS-g-MA block copolymer or dimethyldichlorosilane modified nanosilica. The addition of SEBS-g-MA retards the volume shrinking process and slows down the kinetics of phase separation due to its localization at the PS/PVME interfaces. Consequently, in the later stage of VPS, phase inversion occurs at longer times with respect to the neat blend due to the decreased interfacial tension. In contrast, hydrophobic nanoparticles self-assemble in the bulk of PS-rich phase and restrain the dynamics of polymer chains enhancing the dynamic asymmetry of the system. The efficiency of nanoparticles in controlling the kinetics of phase separation is found to be superior compared to block copolymer-based compatibilizers indicating the significance of chain dynamics. Moreover, beyond a critical nanoparticle volume fraction, phase separation is pinned due to particle percolation within the PS-rich phase, yielding a kinetically trapped VPS-induced network structure.
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89
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Liu Z, Guo R, Xu G, Huang Z, Yan LT. Entropy-mediated mechanical response of the interfacial nanoparticle patterning. NANO LETTERS 2014; 14:6910-6916. [PMID: 25375409 DOI: 10.1021/nl5029396] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The precise organization of nano-objects into well-defined patterns at interfaces is an outstanding challenge in the field of nanocomposites toward technologically important materials and devices. Herein, by means of computer simulations we show novel mechanomutable nanocomposites designed by binary mixtures of tethered Janus nanoparticles at the interface of a binary fluid mixture under mechanical pressure. Our simulations demonstrate that the nanoparticle organization in the systems undergo reversible transition between random state and long-ranged intercalation state, controlled by various structural parameters of the tethered chains and the applied pressure. The dynamical mechanism during the transition is explored through examining the diffusion trajectories of the nanoparticles confined at the interfaces. We provide a theoretical analysis of the lateral pressure induced by the tethered chains, which is fully supported by simulation data and reveals that the compression-induced transition is fundamentally attributed to the entropic effect from the tethered chains. Our study leads to a class of interface-reactive nanomaterials in which the transfer and recovery of interfacial nanopatterning presents precise and tunable mechanical responses.
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Affiliation(s)
- Zhengyang Liu
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University , Beijing 100084, People's Republic of China
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90
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Voyiatzis E, Rahimi M, Müller-Plathe F, Böhm MC. How Thick Is the Polymer Interphase in Nanocomposites? Probing It by Local Stress Anisotropy and Gas Solubility. Macromolecules 2014. [DOI: 10.1021/ma500556q] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Evangelos Voyiatzis
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie and Center of Smart
Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse
4, D-64287 Darmstadt, Germany
| | - Mohammad Rahimi
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie and Center of Smart
Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse
4, D-64287 Darmstadt, Germany
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie and Center of Smart
Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse
4, D-64287 Darmstadt, Germany
| | - Michael C. Böhm
- Eduard-Zintl-Institut
für Anorganische und Physikalische Chemie and Center of Smart
Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Strasse
4, D-64287 Darmstadt, Germany
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91
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Feng Y, Ning N, Zhao Q, Liu J, Zhang L, Tian M, Mi J. Role of block copolymer morphology on particle percolation of polymer nanocomposites. SOFT MATTER 2014; 10:8236-8244. [PMID: 25183477 DOI: 10.1039/c4sm01119h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, the effects of nanoparticle volume fraction, block stiffness, and diblock composition on the microstructure and electrical properties of composites are investigated using molecular dynamics simulation. It is shown that selective localization of conductive nanoparticles in a continuous block of diblock copolymer can dramatically reduce the percolation threshold. In the flexible-flexible copolymer systems with a relatively low particle loading, as the ratio of two blocks varies, one sees four kinds of phase structure: signal continuous, lamellar, co-continuous, and dispersed, corresponding to the order-disorder and continuity-dispersion transitions. In consideration of particle connectivity, the best electrical performance can be achieved with a special tri-continuous microstructure. While in the semi-flexible systems, the existence of rigid blocks can destroy the lamellar structure. If particles are located in the flexible block, a moderate stiffness of the rigid block can extensively enlarge the tri-continuous region, and high conductivity can be realized over a wide range of diblock compositions. If particles are located in the rigid block, however, high conductivity only emerges in a narrow composition range. In addition, the block should be prevented from becoming overstiff because this will cause direct particle aggregation.
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Affiliation(s)
- Yancong Feng
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, China.
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92
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Zhang D, Zhang L. Binding to semiflexible polymers: a novel method to control the structures of small numbers of building blocks. SOFT MATTER 2014; 10:7661-7668. [PMID: 25144601 DOI: 10.1039/c4sm00885e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Through the molecular dynamics simulation method, we demonstrate that long semi-flexible polymer chains can serve as an effective soft elastic medium for manipulating the ordered structures of small numbers of building blocks, which can be easily controlled by the chain bending stiffness. For two spherical particles in a polymer-particle mixture, three types of local organization are identified: monomer level tight particle bridging, direct contact aggregation, and dispersion. For small numbers of spherical particles in a polymer-particle mixture, the ordered structures of particles, such as spherical and linear particle aggregations, depend mainly on chain bending stiffness. For non-spherical building blocks, the relative orientations of neighboring building blocks are also strongly affected by chain bending stiffness. These results can help us to understand the complexity of the self-assembly of small numbers of building blocks in polymer-particle mixtures and the gene activity in living cells, as well as to construct novel materials in the nanotechnology field.
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Affiliation(s)
- Dong Zhang
- Department of Physics, Zhejiang University, Hangzhou 310027, China
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93
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Bae J. A Pathway to Microdomain Alignment in Block Copolymer/Nanoparticle Thin Films under Electric Field. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.9.2689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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94
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Zhang D, He L, Zhang L. Ordered structures of small numbers of nanorods induced by semiflexible star polymers. J Chem Phys 2014; 141:104906. [DOI: 10.1063/1.4895611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Dong Zhang
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - Lilin He
- Department of Physics, Wenzhou University, Wenzhou 325035, China
| | - Linxi Zhang
- Department of Physics, Wenzhou University, Wenzhou 325035, China
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95
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Raos G, Idé J. Impact of Interaction Strength and Surface Heterogeneity on the Dynamics of Adsorbed Polymers. ACS Macro Lett 2014; 3:721-726. [PMID: 35590689 DOI: 10.1021/mz500233c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present molecular dynamics simulations of bead-and-spring polymer chains on chemically heterogeneous, energetically disordered surfaces at near-monolayer coverages. The surfaces consist of random mixtures of weakly (W) and strongly (S) attractive sites. We explore systematically the effect of surface composition on the diffusive dynamics of the chains. The polymer diffusion coefficients have a near-Arrhenius temperature dependence, with activation energies which have a nonmonotonic dependence on the fraction of S sites. In other words, we see a nonmonotonic dependence of the interfacial polymer dynamics on its affinity with the surface, when the latter involves some heterogeneity. The maximum activation energy belongs to the surface containing 75% S and 25% W sites, which combines near-maximum average polymer-surface interactions with near-maximum spread or disorder in these interactions. Our results have interesting implications for polymer adhesion and friction and structure-property relationships in polymer nanocomposites.
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Affiliation(s)
- Guido Raos
- Dipartimento di Chimica,
Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
| | - Julien Idé
- Dipartimento di Chimica,
Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, via L. Mancinelli 7, 20131 Milano, Italy
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96
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Dong B, Guo R, Yan LT. Coassembly of Janus Nanoparticles in Asymmetric Diblock Copolymer Scaffolds: Unconventional Entropy Effect and Role of Interfacial Topology. Macromolecules 2014. [DOI: 10.1021/ma500161j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bojun Dong
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Ruohai Guo
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Li-Tang Yan
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
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97
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Feng Y, Ning N, Wei Z, Zhang L, Tian M, Zou H, Mi J. Towards optimization of electrical network and mechanical property of polymer nanocomposites with grafted nanoparticles. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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98
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Millett PC. Electric-field induced alignment of nanoparticle-coated channels in thin-film polymer membranes. J Chem Phys 2014; 140:144903. [DOI: 10.1063/1.4870471] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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99
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Patra TK, Singh JK. Polymer directed aggregation and dispersion of anisotropic nanoparticles. SOFT MATTER 2014; 10:1823-1830. [PMID: 24652389 DOI: 10.1039/c3sm52216d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aggregation and dispersion of two anisotropic nanoparticles (NPs), cubes and tetrahedrons, in a polymer matrix are studied in this work using coarse-grained molecular dynamics simulations. We present the phase diagrams of NP-polymer composites, depicting microscopically phase-separated, dispersed, and bridged cubes and tetrahedrons in a polymer matrix, which depend on the interaction between the NPs and polymer (εnp), along with the NPs' volume fraction (ϕ). The microscopic phase separation occurs at very low εnp, where NPs self-organize into multidimensional structures, depending on ϕ. In particular, for tetrahedrons, a cross-over from an ordered spherical aggregate to a disordered sheet-like aggregate is observed with increasing ϕ. In the case of cubes, a transition from cubic array → square column → square array (sheet) is identified with increasing ϕ. The clusters of NPs are characterized by their asphericity and principal radii of gyration. The free energy profile for a structured assembly is estimated, which clearly shows that the successful assembly of NPs is energetically favorable at a lower temperature. However, there exists an energy barrier for the successful assembly of all the NPs in the system. At intermediate εnp, a transition from a clustered state to a state comprising dispersed cubes and tetrahedrons in a polymer matrix is observed. At higher εnp, a further transition takes place, where gas-like dispersed NPs form a liquid-like aggregate via polymer layers. Therefore, the findings in this work illustrate that the effective interaction between anisotropic NPs in a polymer matrix is very diverse, which can generate multidimensional structured assemblies, with the disordered clustering, dispersion, and bridging-induced aggregation of NPs.
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Affiliation(s)
- Tarak K Patra
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, India.
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100
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Chen Y, Liu L, Yang Q, Wen S, Zhang L, Zhong C. Computational study of nanoparticle dispersion and spatial distribution in polymer matrix under oscillatory shear flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13932-13942. [PMID: 24125041 DOI: 10.1021/la4028496] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this work, nonequilibrium molecular dynamics simulations were performed to investigate the dispersion and spatial distribution of spherical nanoparticles (NPs) in polymer matrix under oscillatory shear flow. We systematically analyzed the influences of four important factors that consist of NP-polymer interfacial strength, volume fraction of NPs, shear conditions, and polymer chain length. The simulation results showed that the oscillatory shear can greatly improve the dispersion of NPs, especially for the polymer nanocomposites (PNCs) with high NP-polymer interfacial strength. Under specific shear conditions, the NPs can exhibit three different spatial distribution states with increasing the NP-polymer interfacial strength. Interestingly, at high interfacial strength, we observed that the NPs can be distributed on several layers in the polymer matrix, forming the PNCs with sandwich-like structures. Such well-ordered nanocomposites can exhibit a higher tensile strength than those with the NPs dispersed randomly. It may be expected that the information derived in present study provides a useful foundation for guiding the design and preparation of high-performance PNCs.
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Affiliation(s)
- Yulong Chen
- State Key Laboratory of Chemical Resource Engineering, ‡State Key Laboratory of Organic-Inorganic Composites, §Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, and ∥Laboratory of Computational Chemistry, Beijing University of Chemical Technology , Beijing 100029, China
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