1
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Scott DM, Prud'homme RK, Priestley RD. Effects of the polymer glass transition on the stability of nanoparticle dispersions. SOFT MATTER 2023; 19:1212-1218. [PMID: 36661133 DOI: 10.1039/d2sm01595a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In addition to the repulsive and attractive interaction forces described by Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, many charged colloid systems are stabilized by non-DLVO contributions stemming from specific material attributes. Here, we investigate non-DLVO contributions to the stability of polymer colloids stemming from the intra-particle glass transition temperature (Tg). Flash nanoprecipitation is used to fabricate nanoparticles (NPs) from a library of polymers and dispersion stability is studied in the presence of both hydrophilic and hydrophobic salts. When adding KCl, stability undergoes a discontinuous decrease as Tg increases above room temperature, indicating greater stability of rubbery NPs over glassy NPs. Glassy NPs are also found to interact strongly with hydrophobic phosphonium cations (PR4+), yielding charge inversion and intermediate aggregation while rubbery NPs resist ion adsorption. Differences in the lifetime of ionic structuration within mobile surface layers is presented as a potential mechanism underlying the observed phenomenon.
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Affiliation(s)
- Douglas M Scott
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Rodney D Priestley
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.
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2
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Scott DM, Nikoubashman A, Register RA, Priestley RD, Prud'homme RK. Rapid Precipitation of Ionomers for Stabilization of Polymeric Colloids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:570-578. [PMID: 36577027 DOI: 10.1021/acs.langmuir.2c02850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Polymeric colloids have shown potential as "building blocks" in applications ranging from formulations of Pickering emulsions and drug delivery systems to advanced materials, including colloidal crystals and composites. However, for applications requiring tunable properties of charged colloids, obstacles in fabrication can arise through limitations in process scalability and chemical versatility. In this work, the capabilities of flash nanoprecipitation (FNP), a scalable nanoparticle (NP) fabrication technology, are expanded to produce charged polystyrene colloids using sulfonated polystyrene ionomers as a new class of NP stabilizers. Through experimental exploration of formulation parameters, increases in the ionomer content are shown to reduce the particle size, mitigating a significant trade-off between the final particle size and inlet concentration; thus, expanding the processable material throughput of FNP. Further, the degree of sulfonation is found to impact stabilization with optimal performance achieved by selecting ionomers with intermediate (2.45-5.2 mol %) sulfonation. Simulations of single ionomer chains and their arrangement in multicomponent NPs provide molecular insights into the assembly and structure of NPs wherein the partitioning of ionomers to the particle surface depends on the polymer molecular weight and degree of sulfonation. By combining the insights from simulations with diffusion-limited growth kinetics and parametric fits to experimental data, a simple design formulation relation is proposed and validated. This work highlights the potential of ionomer-based stabilizers for controllably producing charged NP dispersions in a scalable manner.
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Affiliation(s)
- Douglas M Scott
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey08544, United States
| | - Arash Nikoubashman
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, Mainz55128, Germany
| | - Richard A Register
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey08544, United States
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey08544, United States
| | - Rodney D Priestley
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey08544, United States
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey08544, United States
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey08544, United States
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3
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Dhumal U, Erigi U, Tripathy M. Polymer-mediated self-assembly, dispersion, and phase separation of Janus nanorods. Phys Chem Chem Phys 2022; 24:23634-23650. [PMID: 36134618 DOI: 10.1039/d2cp01743a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The challenge of stabilizing polymer nanocomposites lies in the fact that nanoparticles tend to phase separate from the polymer melt due to an entropic 'depletion attraction' between nanoparticles. Additionally, composites of polymer and nanorods show a decrease in miscibility with increasing nanorod aspect ratio [U. K. Sankar and M. Tripathy, Macromolecules, 2015, 48, 432-442; U. Erigi, U. Dhumal and M. Tripathy, J. Chem. Phys., 2021, 154, 124903]. In this work, we have studied the structure and phase behaviour of polymer-Janus nanorod mixtures using Polymer Reference Interaction Site Model (PRISM) theory and molecular dynamics simulations. The composite system of polymer and Janus nanorods of two different thicknesses, at various Janus nanorod densities, and for different interaction strengths between polymer and attractive sites of Janus nanorods (εpa), is investigated for their miscibility and self-assembly. At low Janus nanorod density, PRISM theory predicts transitions from the entropic depletion-driven contact aggregation of Janus nanorods to a well-dispersed phase to the bridging-driven phase separation of Janus nanorods, with increasing εpa. This behaviour is similar to earlier predictions for homogeneous nanorods. However, molecular dynamics simulations do not confirm the bridging-driven phase separation at high εpa predicted by PRISM theory. We find that both PRISM theory and molecular dynamics simulations are in agreement in the intermediate and high Janus nanorod density regimes. PRISM theory predicts, and simulations confirm, that at high Janus nanorod densities, the system undergoes a transition from depletion-driven macrophase separation to dispersion to chemical anisotropy-driven self-assembly with increasing εpa. The self-assembly at high εpa is mediated by the polymer. At intermediate Janus nanorod densities, the usual transition from an entropic depletion-driven macrophase separation to dispersion is predicted at low εpa. At high εpa, both PRISM theory and molecular dynamics simulations show transition to a state that is simultaneously macrophase separated and microphase separated (self-assembled).
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Affiliation(s)
- Umesh Dhumal
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Umashankar Erigi
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Mukta Tripathy
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
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4
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Nanoprecipitation as a simple and straightforward process to create complex polymeric colloidal morphologies. Adv Colloid Interface Sci 2021; 294:102474. [PMID: 34311157 DOI: 10.1016/j.cis.2021.102474] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/25/2021] [Accepted: 06/27/2021] [Indexed: 01/19/2023]
Abstract
Polymeric nanoparticles are highly important functional nanomaterials for a large range of applications from therapeutics to energy. Advances in nanotechnology have enabled the engineering of multifunctional polymeric nanoparticles with a variety of shapes and inner morphologies. Thanks to its inherent simplicity, the nanoprecipitation technique has progressively become a popular approach to construct polymeric nanoparticles with precise control of nanostructure. The present review highlights the great capability of this technique in controlling the fabrication of various polymeric nanostructures of interest. In particular, we show here how the nanoprecipitation of either block copolymers or mixtures of homopolymers can afford a myriad of colloids displaying equilibrium (typically onion-like) or out-of-equilibrium (stacked lamellae, porous cores) morphologies, depending whether the system "freezes" while passing the glass transition or crystallization point of starting materials. We also show that core-shell morphologies, either from polymeric or oil/polymer mixtures, are attainable by this one-pot process. A final discussion proposes new directions to enlarge the scope and possible achievements of the process.
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5
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Karami-Darehnaranji M, Taghizadeh SM, Mirzaei E, Berenjian A, Ebrahiminezhad A. Size Tuned Synthesis of FeOOH Nanorods toward Self-Assembled Nanoarchitectonics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:115-123. [PMID: 33346669 DOI: 10.1021/acs.langmuir.0c02466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Various studies were performed to fabricate self-assembling nanoobjects out of noble metals, but a few efforts were made for engineering iron-based nanorods toward sell-assembling blocks. In this regard β-FeOOH nanorods were fabricated in various sizes to achieve iron-based rod nanoblocks with self-assembling potential. Hydrolysis of ferric ions in various concentrations was successfully developed as a novel approach to control the growth of β-FeOOH crystals and tuning the length of rods in the nano range, below 100 nm. It was found that the concentration of ferric ion has no effect on the widths of nanorods, but the length was affected. By increasing the concentration of ferric ions, an increase in the length of nanorods and an increase of aspect ratio occurred. All sizes of the resulting FeOOH nanorods exhibited mesoporous feature, but interestingly the hysteresis loops were different due to different pore patterns. In fact, pores on the larger particles were more uniform in size and shape. Nanorods of small length did not make suitable interactions toward ordered phase formation, but rods with the mean length of about 90 nm or longer, at a certain concentration, were able to form nematic phases. The large (∼+40 mV) zeta-potential of nanorods prevents formation of dense arrays, and just bundle-like structures were observed. These findings highlight the importance of size, surface charge, and concentration of nanoobjects in the formation of 3D structures. The developed technique in the fabrication of β-FeOOH nanorods provides pure structures that are free from any size-controlling agent. These pure structures are suitable for further functionalization or coating. Self-assembling nanoobjects is a developing field in nanotechnology, and therefore studies can help our understanding over the assembling process.
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Affiliation(s)
- Mahboubeh Karami-Darehnaranji
- Department of Medical Nanotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyedeh-Masoumeh Taghizadeh
- Biotechnology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Esmaeil Mirzaei
- Department of Medical Nanotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Aydin Berenjian
- School of Engineering, Faculty of Science and Engineering, The University of Waikato, Hamilton, New Zealand
| | - Alireza Ebrahiminezhad
- Department of Medical Nanotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
- Biotechnology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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6
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Tkachenko V, Josien L, Schrodj G, Hajjar-Garreau S, Urbaniak S, Poly J, Chemtob A. A DSC and XPS characterization of core–shell morphology of block copolymer nanoparticles. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04676-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Morozova T, Lee VE, Bizmark N, Datta SS, Prud’homme RK, Nikoubashman A, Priestley RD. In Silico Design Enables the Rapid Production of Surface-Active Colloidal Amphiphiles. ACS CENTRAL SCIENCE 2020; 6:166-173. [PMID: 32123734 PMCID: PMC7047274 DOI: 10.1021/acscentsci.9b00974] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Indexed: 05/02/2023]
Abstract
A new technology platform built on the integration of theory and experiments to enable the design of Janus colloids with precision control of surface anisotropy and amphiphilicity could lead to a disruptive transformation in the next generation of surfactants, photonic or phononic materials, and coatings. Here, we exploit molecular dynamics (MD) simulations to guide the rational design of amphiphilic polymer Janus colloids by Flash NanoPrecipitation (FNP), a method capable of the production of colloids with complex structure without the compromise of reduced scalability. Aided by in silico design, we show in experiments that amphiphilic Janus colloids can be produced using a unique blend of hydrophobic homopolymers and the addition of an amphiphilic block copolymer. The final structure of the colloids depends on the mass fraction of each homopolymer as well as the concentration and composition of the block copolymer additive. To confirm the surface activity of the colloids, we demonstrate their potential to stabilize Pickering emulsions. This hybrid approach of simulations and experiments provides a pathway to designing and manufacturing complex polymeric colloids on an industrial scale.
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Affiliation(s)
- Tatiana
I. Morozova
- Institute
of Physics, Johannes Gutenberg University
Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Victoria E. Lee
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Navid Bizmark
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
- Princeton
Institute for the Science and Technology of Materials, Princeton, New Jersey 08544, United States
| | - Sujit S. Datta
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert K. Prud’homme
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Arash Nikoubashman
- Institute
of Physics, Johannes Gutenberg University
Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Rodney D. Priestley
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
- Princeton
Institute for the Science and Technology of Materials, Princeton, New Jersey 08544, United States
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8
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Morozova TI, Nikoubashman A. Surface Activity of Soft Polymer Colloids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16907-16914. [PMID: 31789037 DOI: 10.1021/acs.langmuir.9b03202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We investigate the behavior of polymer colloids at the interface between two immiscible liquids using molecular dynamics simulations. We study several colloid morphologies with various degrees of amphiphilicity, that is, purely solvophobic homogeneous and Janus particles and amphiphilic Janus and core-shell particles. Regardless of the specific morphology, the polymer colloids irreversibly anchor at the liquid-liquid interface, accompanied by a marked reduction of the interfacial tension, γ. Purely solvophobic particles lower γ because they reduce the interfacial area shared by the two immiscible liquids, whereas amphiphilic colloids have an additional enthalpic contribution. At the liquid-liquid interface, the solvophobic particles deform into oblate ellipsoids to maximize the occluded area at the interface. In contrast, amphiphilic Janus colloids orient their solvophobic/solvophilic parts toward the preferred liquids and form a prolate particle shape. The amphiphilic core-shell particles undergo a morphological transition to a prolate Janus-like structure as they anchor at the interface. We rationalize the deformation of the polymer colloids by considering a simple model system of spheroidal particles pinned at the liquid-liquid interface. We systematically compute the interfacial free energy for the various colloids as a function of their asphericity and find excellent qualitative agreement with the simulation findings. Our results show that solvophobic homoparticles can be almost as efficient surface-active agents as amphiphilic Janus colloids.
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Affiliation(s)
- Tatiana I Morozova
- Institute of Physics , Johannes Gutenberg University Mainz , Staudingerweg 7 , 55128 Mainz , Germany
| | - Arash Nikoubashman
- Institute of Physics , Johannes Gutenberg University Mainz , Staudingerweg 7 , 55128 Mainz , Germany
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9
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Li N, Nikoubashman A, Panagiotopoulos AZ. Self-Assembly of Polymer Blends and Nanoparticles through Rapid Solvent Exchange. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3780-3789. [PMID: 30759987 DOI: 10.1021/acs.langmuir.8b04197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Molecular dynamics simulations were performed to study the fabrication of polymeric colloids containing inorganic nanoparticles (NPs) via the flash nanoprecipitation (FNP) technique. During this process, a binary polymer blend, initially in a good solvent for the polymers, is rapidly mixed with NPs and a poor solvent for the polymers that is miscible with the good solvent. The simulations reveal that the polymers formed Janus particles with NPs distributed either on the surface of the aggregates, throughout their interior, or aligned at the interface between the two polymer domains, depending on the NP-polymer and NP-solvent interactions. The loading and surface density of NPs can be controlled by the polymer feed concentration, the NP feed concentration, and their ratio in the feed streams. Selective localization of NPs by incorporating electrostatic interactions between polymers and NPs has also been investigated, and was shown to be an effective way to enhance NP loading and surface density as compared to the case with only van der Waals attractions. This work demonstrates that the FNP process is promising for the production of structured and hybrid nanocolloids in a continuous and scalable way, with independent control over particle properties such as size, NP location, loading, and surface density. Our results provide useful guidelines for experimental fabrication of such hybrid nanoparticles.
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Affiliation(s)
- Nannan Li
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Arash Nikoubashman
- Institute of Physics , Johannes Gutenberg University Mainz , Staudingerweg 7 , Mainz 55128 , Germany
| | - Athanassios Z Panagiotopoulos
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
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10
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Hirai Y, Yabu H. Self-assembled microrings of Au nanoparticle and Au nanorod clusters formed at the equators of Janus particles. RSC Adv 2019; 9:17183-17186. [PMID: 35519889 PMCID: PMC9064551 DOI: 10.1039/c9ra02767j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 05/28/2019] [Indexed: 12/02/2022] Open
Abstract
A method for fabricating polymer Janus particles with microring structures at their equators has been developed. This method allows gold nanoparticles and nanorods to be aligned and densely packed along the microrings. A method for fabricating polymer Janus particles with metal nanoparticle microring structures at their equators has been developed.![]()
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Affiliation(s)
- Yutaro Hirai
- WPI-Advanced Institute for Materials Research (AIMR)
- Tohoku University
- Sendai 980-8577
- Japan
| | - Hiroshi Yabu
- WPI-Advanced Institute for Materials Research (AIMR)
- Tohoku University
- Sendai 980-8577
- Japan
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11
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Pourrahimi AM, Pumera M. Multifunctional and self-propelled spherical Janus nano/micromotors: recent advances. NANOSCALE 2018; 10:16398-16415. [PMID: 30178795 DOI: 10.1039/c8nr05196h] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Recent progress in autonomous self-propelled multifunctional Janus nano/micromotors, which are able to convert chemical or light energy into mechanical motion, is presented. This technology of moving micro- and nanodevices is at the forefront of materials research and is a promising and growing technology with the possibility of using these motors in both biomedical and environmental applications. The development of novel multifunctional Janus motors together with their motion mechanisms is discussed. Different preparation and synthesis routes are compared. The effects of the size, interfacial structures and porosity on the directional motion and the speed of Janus micromotors are discussed. For light-derived Janus micromotors, newly developed techniques that are able to observe directly the interfaces' charge distribution on a nanometer scale are presented in order to clarify the underlying electrophoresis motion mechanism. This review aims to encourage further research in the field of micromotors using new and facile methodologies for obtaining novel Janus motors with enhanced motion and activity.
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Affiliation(s)
- Amir Masoud Pourrahimi
- Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague 6, Czech Republic.
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12
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Li N, Nikoubashman A, Panagiotopoulos AZ. Multi-scale simulations of polymeric nanoparticle aggregation during rapid solvent exchange. J Chem Phys 2018; 149:084904. [DOI: 10.1063/1.5046159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Affiliation(s)
- Nannan Li
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Arash Nikoubashman
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
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13
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Grundy LS, Lee VE, Li N, Sosa C, Mulhearn WD, Liu R, Register RA, Nikoubashman A, Prud'homme RK, Panagiotopoulos AZ, Priestley RD. Rapid Production of Internally Structured Colloids by Flash Nanoprecipitation of Block Copolymer Blends. ACS NANO 2018; 12:4660-4668. [PMID: 29723470 DOI: 10.1021/acsnano.8b01260] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Colloids with internally structured geometries have shown great promise in applications ranging from biosensors to optics to drug delivery, where the internal particle structure is paramount to performance. The growing demand for such nanomaterials necessitates the development of a scalable processing platform for their production. Flash nanoprecipitation (FNP), a rapid and inherently scalable colloid precipitation technology, is used to prepare internally structured colloids from blends of block copolymers and homopolymers. As revealed by a combination of experiments and simulations, colloids prepared from different molecular weight diblock copolymers adopt either an ordered lamellar morphology consisting of concentric shells or a disordered lamellar morphology when chain dynamics are sufficiently slow to prevent defect annealing during solvent exchange. Blends of homopolymer and block copolymer in the feed stream generate more complex internally structured colloids, such as those with hierarchically structured Janus and patchy morphologies, due to additional phase separation and kinetic trapping effects. The ability of the FNP process to generate such a wide range of morphologies using a simple and scalable setup provides a pathway to manufacturing internally structured colloids on an industrial scale.
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Affiliation(s)
- Lorena S Grundy
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Victoria E Lee
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Nannan Li
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Chris Sosa
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - William D Mulhearn
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Rui Liu
- Ministry of Education Key Laboratory of Advanced Civil Engineering Materials, School of Materials Science and Engineering and Institute for Advanced Study , Tongji University , Shanghai 201804 , China
| | - Richard A Register
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
- Princeton Institute for the Science and Technology of Materials , Princeton University , Princeton , New Jersey 08544 , United States
| | - Arash Nikoubashman
- Institute of Physics , Johannes Gutenberg University Mainz , Staudingerweg 7 , 55128 Mainz , Germany
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Athanassios Z Panagiotopoulos
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
| | - Rodney D Priestley
- Department of Chemical and Biological Engineering , Princeton University , Princeton , New Jersey 08544 , United States
- Princeton Institute for the Science and Technology of Materials , Princeton University , Princeton , New Jersey 08544 , United States
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14
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Morozova TI, Nikoubashman A. Coil–Globule Collapse of Polystyrene Chains in Tetrahydrofuran–Water Mixtures. J Phys Chem B 2018; 122:2130-2137. [DOI: 10.1021/acs.jpcb.7b10603] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Tatiana I. Morozova
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Arash Nikoubashman
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
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15
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Mamone S, Glöggler S. Nuclear spin singlet states as magnetic on/off probes in self-assembling systems. Phys Chem Chem Phys 2018; 20:22463-22467. [DOI: 10.1039/c8cp04448a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nuclear singlet states in thermo-responsive peptides are introduced as magnetic on/off switches.
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Affiliation(s)
- Salvatore Mamone
- Max Planck Institute for Biophysical Chemistry
- 37077 Göttingen
- Germany
- Center for Biostructural Imaging of Neurodegeneration of UMG
- 37075 Göttingen
| | - Stefan Glöggler
- Max Planck Institute for Biophysical Chemistry
- 37077 Göttingen
- Germany
- Center for Biostructural Imaging of Neurodegeneration of UMG
- 37075 Göttingen
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16
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Li N, Nikoubashman A, Panagiotopoulos AZ. Controlled production of patchy particles from the combined effects of nanoprecipitation and vitrification. SOFT MATTER 2017; 13:8433-8441. [PMID: 29083005 DOI: 10.1039/c7sm01896g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Using molecular dynamics simulations, we study a simple and scalable method for fabricating patchy nanoparticles via the assembly of binary polymer blends under a rapid solvent exchange. Patchiness can be achieved by incorporating a glassy component, which kinetically traps the particle morphology along the path to the equilibrium configuration. Our simulations reveal that the number of surface patches increases for larger nanoparticles and for more asymmetric blend ratios, while the size distribution of the patches remains rather uniform. Other than multi-patch nanoparticles, Janus structures have been obtained for small nanoparticles. Further, ribbon structures with elongated surface domains have also been observed for more symmetric blend ratios. Our simulations demonstrate that the nanoprecipitation technique allows for independent control over nanoparticle size, patchiness and composition. This work gives microscopic insights on the static and dynamic properties of the self-assembled particles, and provides useful guidelines for fabricating tailored patchy nanoparticles for applications in various areas.
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Affiliation(s)
- Nannan Li
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA.
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17
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Lee VE, Sosa C, Liu R, Prud'homme RK, Priestley RD. Scalable Platform for Structured and Hybrid Soft Nanocolloids by Continuous Precipitation in a Confined Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3444-3449. [PMID: 28319397 DOI: 10.1021/acs.langmuir.7b00249] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Geometrically structured polymer nanocolloids, including Janus nanocolloids, have been widely investigated for their unique properties, which are derived from their anisotropy. Controlled surface decoration with inorganic nanoparticles could induce another level of functionality into structured nanocolloids that could enable applications in fields ranging from rewriteable electronics to biphasic catalysis. Here, we demonstrate flash nanoprecipitation (FNP) as a one-step, scalable process platform for manufacturing hybrid polymer-inorganic nanocolloids in which one phase is selectively decorated with a metal nanocatalyst by tuning the molecular interactions between the feed ingredients during the process. For instance, by modifying the polymer end-group functionality, we document the ability to tune the location of the metal nanocatalyst, including placement at the nanocolloid circumference. Moreover, the addition of molecular additives is shown to transform the Janus nanocolloid structure from spherical to dumbbell or snowman while maintaining the ability to control the nanocatalyst location. In considering the flexibility and continuous nature of the FNP process, it offers an industrial-scale platform for the manufacturing of nanomaterials that are anticipated to impact many technologies.
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Affiliation(s)
| | | | - Rui Liu
- Ministry of Education Key Laboratory of Advanced Civil Engineering Material, School of Materials Science and Engineering and Institute for Advanced Study, Tongji University , Shanghai, China 201804
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Sheng Y, Xia L, Yang G, Xia Y, Huang Y, Pan C, Zhu Y. Stepwise study on Janus-like particles fabricated by polymeric mixtures within soft droplets: a Monte Carlo simulation. RSC Adv 2017. [DOI: 10.1039/c7ra06190k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Janus particles were fabricated using different polymer mixtures and the self-assembly behavior for different particles was compared.
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Affiliation(s)
- Yuping Sheng
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
| | - Li Xia
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
| | - Guanzhou Yang
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
| | - Yiqing Xia
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
- College of Materials Science and Engineering
| | - Yong Huang
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
| | - Chuanjiang Pan
- Analytical and Testing Center
- Sichuan University of Science and Engineering
- Zigong 643000
- People's Republic of China
| | - Yutian Zhu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
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