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Surfactant Induced Synthesis of LiAlH4 and NaAlH4 Nanoparticles for Hydrogen Storage. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094742] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
LiAlH4 and NaAlH4 are considered to be promising hydrogen storage materials due to their high hydrogen density. However, their practical use is hampered by the lack of hydrogen reversibility along with poor kinetics. Nanosizing is an effective strategy to enable hydrogen reversibility under practical conditions. However, this has remained elusive as the synthesis of alanate nanoparticles has not been explored. Herein, a simple solvent evaporation method is demonstrated to assemble alanate nanoparticles with the use of surfactants as a stabilizer. More importantly, the roles of the surfactants in enabling control over particle size and morphology was determined. Surfactants with long linear carbon chains and matching the hard character of alanates are more prone to lead to the formation of small particles of ~10 nm due to steric hindrance. This can result in significant shifts in the temperature for hydrogen release.
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2
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Eisele DM, Visaveliya N, Kelestemur S, Khatoon F, Xu J, Leo K, St. Peter L, Chan C, Mikhailova T, Bexheti V, Kapadia A, Carbery WP, Ng K, Maity P. Microfluidic-Supported Synthesis of Anisotropic Polyvinyl Methacrylate Nanoparticles via Interfacial Agents. Polym Chem 2022. [DOI: 10.1039/d1py01729b] [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
For polymer particles, recent studies emphasized that the particle shape—not size—plays the dominant role in novel applications in fields ranging from nanotechnology, biomedicine, to photonics, which has intensified the quest...
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Textured and Hierarchically Constructed Polymer Micro- and Nanoparticles. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112110421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Microfluidic techniques allow for the tailored construction of specific microparticles, which are becoming increasingly interesting and relevant. Here, using a microfluidic hole-plate-device and thermal-initiated free radical polymerization, submicrometer polymer particles with a highly textured surface were synthesized. Two types of monomers were applied: (1) methylmethacrylate (MMA) combined with crosslinkers and (2) divinylbenzene (DVB). Surface texture and morphology can be influenced by a series of parameters such as the monomer–crosslinker–solvent composition, surfactants, and additives. Generally, the most structured surfaces with the simultaneously most uniform particles were obtained in the DVB–toluene–nonionic-tensides system. In a second approach, poly-MMA (PMMA) particles were used to build aggregates with bigger polymer particles. For this purpose, tripropyleneglycolediacrylate (TPGDA) particles were synthesized in a microfluidic co-flow arrangement and polymerized by light- irradiation. Then, PMMA particles were assembled at their surface. In a third step, these composites were dispersed in an aqueous acrylamide–methylenebisacrylamide solution, which again was run through a co-flow-device and photopolymerized. As such, entities consisting of particles of three different size ranges—typically 0.7/30/600 µm—were obtained. The particles synthesized by both approaches are potentially suitable for loading with or incorporation of analytic probes or catalysts such as dyes or metals.
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Preparation, Physical Properties, and Applications of Water-Based Functional Polymer Inks. Polymers (Basel) 2021; 13:polym13091419. [PMID: 33925696 PMCID: PMC8124647 DOI: 10.3390/polym13091419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, water-based functional polymer inks are prepared using different solvent displacement methods, in particular, polymer functional inks based on semiconducting polymer poly(3-hexylthiophene) and the ferroelectric polymer poly(vinylidene fluoride) and its copolymers with trifluoroethylene. The nanoparticles that are included in the inks are prepared by miniemulsion, as well as flash and dialysis nanoprecipitation techniques and we discuss the properties of the inks obtained by each technique. Finally, an example of the functionality of a semiconducting/ferroelectric polymer coating prepared from water-based inks is presented.
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Visaveliya NR, Köhler JM. Emerging Structural and Interfacial Features of Particulate Polymers at the Nanoscale. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13125-13143. [PMID: 33112618 DOI: 10.1021/acs.langmuir.0c02566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Particulate polymers at the nanoscale are exceedingly promising for diversified functional applications ranging from biomedical and energy to sensing, labeling, and catalysis. Tailored structural features (i.e., size, shape, morphology, internal softness, interior cross-linking, etc.) determine polymer nanoparticles' impact on the cargo loading capacity and controlled/sustained release, possibility of endocytosis, degradability, and photostability. The designed interfacial features, however (i.e., stimuli-responsive surfaces, wrinkling, surface porosity, shell-layer swellability, layer-by-layer surface functionalization, surface charge, etc.), regulate nanoparticles' interfacial interactions, controlled assembly, movement and collision, and compatibility with the surroundings (e.g., solvent and biological environments). These features define nanoparticles' overall properties/functions on the basis of homogeneity, stability, interfacial tension, and minimization of the surface energy barrier. Lowering of the resultant outcomes is directly influenced by inhomogeneity in the structural and interfacial design through the structure-function relationship. Therefore, a key requirement is to produce well-defined polymer nanoparticles with controlled characteristics. Polymers are amorphous, flexible, and soft, and hence controlling their structural/interfacial features through the single-step process is a challenge. The microfluidics reaction strategy is very promising because of its wide range of advantages such as efficient reactant mixing and fast phase transfer. Overall, this feature article highlights the state-of-the-art synthetic features of polymer nanoparticles with perspectives on their advanced applications.
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Affiliation(s)
- Nikunjkumar R Visaveliya
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, 98693 Ilmenau, Germany
- Department of Chemistry and Biochemistry, The City College of The City University of New York, New York, New York 10031, United States
| | - J Michael Köhler
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, 98693 Ilmenau, Germany
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Preparation and Deep Characterization of Composite/Hybrid Multi-Scale and Multi-Domain Polymeric Microparticles. MATERIALS 2019; 12:ma12233921. [PMID: 31783523 PMCID: PMC6926969 DOI: 10.3390/ma12233921] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/18/2019] [Accepted: 11/21/2019] [Indexed: 11/17/2022]
Abstract
Polymeric microparticles were produced following a three-step procedure involving (i) the production of an aqueous nanoemulsion of tri and monofunctional acrylate-based monomers droplets by an elongational-flow microemulsifier, (ii) the production of a nanosuspension upon the continuous-flow UV-initiated miniemulsion polymerization of the above nanoemulsion and (iii) the production of core-shell polymeric microparticles by means of a microfluidic capillaries-based double droplets generator; the core phase was composed of the above nanosuspension admixed with a water-soluble monomer and gold salt, the shell phase comprised a trifunctional monomer, diethylene glycol and a silver salt; both phases were photopolymerized on-the-fly upon droplet formation. Resulting microparticles were extensively analyzed by energy dispersive X-rays spectrometry and scanning electron microscopy to reveal the core-shell morphology, the presence of silver nanoparticles in the shell, organic nanoparticles in the core but failed to reveal the presence of the gold nanoparticles in the core presumably due to their too small size (c.a. 2.5 nm). Nevertheless, the reddish appearance of the as such prepared polymer microparticles emphasized that this three-step procedure allowed the easy elaboration of composite/hybrid multi-scale and multi-domain polymeric microparticles.
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7
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Campos I, Paiva T, Ferraz H, Pinto JC. Effects of miniemulsion operation conditions on the immobilization of BSA onto PMMA nanoparticles. POLIMEROS 2019. [DOI: 10.1590/0104-1428.05818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Chitemere RP, Stafslien S, Rasulev B, Webster DC, Quadir M. Soysome: A Surfactant-Free, Fully Biobased, Self-Assembled Platform for Nanoscale Drug Delivery Applications. ACS APPLIED BIO MATERIALS 2018; 1:1830-1841. [DOI: 10.1021/acsabm.8b00317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruvimbo P. Chitemere
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Shane Stafslien
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Bakhtiyor Rasulev
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Dean C. Webster
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Mohiuddin Quadir
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
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Yu B, Cong H, Peng Q, Gu C, Tang Q, Xu X, Tian C, Zhai F. Current status and future developments in preparation and application of nonspherical polymer particles. Adv Colloid Interface Sci 2018; 256:126-151. [PMID: 29705026 DOI: 10.1016/j.cis.2018.04.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 03/30/2018] [Accepted: 04/14/2018] [Indexed: 11/16/2022]
Abstract
Nonspherical polymer particles (NPPs) are nano/micro-particulates of macromolecules that are anisotropic in shape, and can be designed anisotropic in chemistry. Due to shape and surface anisotropies, NPPs bear many unique structures and fascinating properties which are distinctly different from those of spherical polymer particles (SPPs). In recent years, the research on NPPs has surprisingly blossomed in recent years, and many practical materials based on NPPs with potential applications in photonic device, material science and biomedical engineering have been generated. In this review, we give a systematic, balanced and comprehensive summary of the main aspects of NPPs related to their preparation and application, and propose perspectives for the future developments of NPPs.
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Affiliation(s)
- Bing Yu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China; Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China; Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Qiaohong Peng
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Chuantao Gu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Qi Tang
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Xiaodan Xu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Chao Tian
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
| | - Feng Zhai
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
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Thermal Calcination-Based Production of SnO₂ Nanopowder: An Analysis of SnO₂ Nanoparticle Characteristics and Antibacterial Activities. NANOMATERIALS 2018; 8:nano8040250. [PMID: 29673195 PMCID: PMC5923580 DOI: 10.3390/nano8040250] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/05/2018] [Accepted: 04/10/2018] [Indexed: 11/17/2022]
Abstract
SnO2 nanoparticle production using thermal treatment with tin(II) chloride dihydrate and polyvinylpyrrolidone capping agent precursor materials for calcination was investigated. Samples were analyzed using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), diffuse UV-vis reflectance spectra, photoluminescence (PL) spectra and the electron spin resonance (ESR). XRD analysis found tetragonal crystalline structures in the SnO2 nanoparticles generated through calcination. EDX and FT-IR spectroscopy phase analysis verified the derivation of the Sn and O in the SnO2 nanoparticle samples from the precursor materials. An average nanoparticle size of 4–15.5 nm was achieved by increasing calcination temperature from 500 °C to 800 °C, as confirmed through TEM. The valence state and surface composition of the resulting nanoparticle were analyzed using XPS. Diffuse UV-vis reflectance spectra were used to evaluate the optical energy gap using the Kubelka-Munk equation. Greater calcination temperature resulted in the energy band gap falling from 3.90 eV to 3.64 eV. PL spectra indicated a positive relationship between particle size and photoluminescence. Magnetic features were investigated through ESR, which revealed the presence of unpaired electrons. The magnetic field resonance decreases along with an increase of the g-factor value as the calcination temperature increased from 500 °C to 800 °C. Finally, Escherichia coli ATCC 25922 Gram (–ve) and Bacillus subtilis UPMC 1175 Gram (+ve) were used for in vitro evaluation of the tin oxide nanoparticle’s antibacterial activity. This work indicated that the zone of inhibition of 22 mm has good antibacterial activity toward the Gram-positive B. subtilis UPMC 1175.
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Visaveliya NR, Köhler JM. Single-Step In Situ Assembling Routes for the Shape Control of Polymer Nanoparticles. Biomacromolecules 2018; 19:1047-1064. [DOI: 10.1021/acs.biomac.8b00034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nikunjkumar R. Visaveliya
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, Weimarer Strasse 32, D-98693 Ilmenau, Germany
| | - J. Michael Köhler
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, Weimarer Strasse 32, D-98693 Ilmenau, Germany
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12
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Synthesis of Aloevera/Acrylonitrile based Nanoparticles for targeted drug delivery of 5-Aminosalicylic acid. Int J Biol Macromol 2018; 106:930-939. [DOI: 10.1016/j.ijbiomac.2017.08.085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 08/10/2017] [Accepted: 08/14/2017] [Indexed: 11/22/2022]
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13
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Al-Hada NM, Mohamed Kamari H, Abdullah CAC, Saion E, Shaari AH, Talib ZA, Matori KA. Down-top nanofabrication of binary (CdO) x (ZnO) 1-x nanoparticles and their antibacterial activity. Int J Nanomedicine 2017; 12:8309-8323. [PMID: 29200844 PMCID: PMC5702176 DOI: 10.2147/ijn.s150405] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In the present study, binary oxide (cadmium oxide [CdO])x (zinc oxide [ZnO])1-x nanoparticles (NPs) at different concentrations of precursor in calcination temperature were prepared using thermal treatment technique. Cadmium and zinc nitrates (source of cadmium and zinc) with polyvinylpyrrolidone (capping agent) have been used to prepare (CdO)x (ZnO)1-x NPs samples. The sample was characterized by X-ray diffraction (XRD), scanning electron microscopy, energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy. XRD patterns analysis revealed that NPs were formed after calcination, which showed a cubic and hexagonal crystalline structure of (CdO)x (ZnO)1-x NPs. The phase analysis using EDX spectroscopy and FTIR spectroscopy confirmed the presence of Cd and Zn as the original compounds of prepared (CdO)x (ZnO)1-x NP samples. The average particle size of the samples increased from 14 to 33 nm as the concentration of precursor increased from x=0.20 to x=0.80, as observed by TEM results. The surface composition and valance state of the prepared product NPs were determined by X-ray photoelectron spectroscopy (XPS) analyses. Diffuse UV-visible reflectance spectra were used to determine the optical band gap through the Kubelka-Munk equation; the energy band gap was found to decrease for CdO from 2.92 to 2.82 eV and for ZnO from 3.22 to 3.11 eV with increasing x value. Additionally, photoluminescence (PL) spectra revealed that the intensity in PL increased with an increase in particle size. In addition, the antibacterial activity of binary oxide NP was carried out in vitro against Escherichia coli ATCC 25922 Gram (-ve), Salmonella choleraesuis ATCC 10708, and Bacillus subtilis UPMC 1175 Gram (+ve). This study indicated that the zone of inhibition of 21 mm has good antibacterial activity toward the Gram-positive B. subtilis UPMC 1175.
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Affiliation(s)
| | | | | | | | | | | | - Khamirul Amin Matori
- Department of Physics, Faculty of Science
- Materials Synthesis and Characterization Laboratory (MSCL), Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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14
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Zeng F, Jiang Y, Wang B, Mao C, Han Q, Ma Z. Self-Organization of Hyperbranched Polyesters Functionalized with Pyrrolo[2,1-a]isoquinoline End Groups and Their Fluorescent Recognition of Anthracene and Pyrene. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Fanyang Zeng
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Yuliang Jiang
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Bingxiang Wang
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Chun Mao
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Qiaorong Han
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
| | - Zhenye Ma
- Jiangsu Key Laboratory of Biofunctional Materials; Key Laboratory of Applied Photochemisty; School of Chemistry and Materials Science; Nanjing Normal University; Nanjing 210097 China
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15
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Abstract
Engineering characteristics of liquid–liquid microflow and its advantages in chemical reactions.
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Affiliation(s)
- Kai Wang
- The State Key Laboratory of Chemical Engineering
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Liantang Li
- The State Key Laboratory of Chemical Engineering
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Pei Xie
- The State Key Laboratory of Chemical Engineering
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Guangsheng Luo
- The State Key Laboratory of Chemical Engineering
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
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16
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Visaveliya N, Knauer A, Köhler JM. Application of Polyionic Macromolecules in Micro Flow Syntheses of Nanoparticles. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600371] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nikunjkumar Visaveliya
- Department of Physical Chemistry and Microreaction Technology; Institute for Micro- and Nanotechnologies/Institute for Chemistry and Microreaction Technology; Technische Universität Ilmenau; 98693 Ilmenau Germany
| | - Andrea Knauer
- Department of Physical Chemistry and Microreaction Technology; Institute for Micro- and Nanotechnologies/Institute for Chemistry and Microreaction Technology; Technische Universität Ilmenau; 98693 Ilmenau Germany
| | - Johann Michael Köhler
- Department of Physical Chemistry and Microreaction Technology; Institute for Micro- and Nanotechnologies/Institute for Chemistry and Microreaction Technology; Technische Universität Ilmenau; 98693 Ilmenau Germany
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17
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Seiffert S. Microfluidics and Macromolecules: Top-Down Analytics and Bottom-Up Engineering of Soft Matter at Small Scales. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sebastian Seiffert
- Johannes Gutenberg-Universität Mainz; Institute of Physical Chemistry; Duesbergweg 10-14 55128 Mainz Germany
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18
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Microflow-assisted assembling of multi-scale polymer particles by controlling surface properties and interactions. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Uehara H, Ishizuka M, Tanaka H, Kano M, Yamanobe T. Stereocomplex poly(lactic acid) nanoparticles crystallized through nanoporous membranes and application as nucleating agent. RSC Adv 2016. [DOI: 10.1039/c5ra25688g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Stereocomplex crystallization of poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) was performed by flowing their blended solution through nano-channels of porous membranes.
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Affiliation(s)
- Hiroki Uehara
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Mina Ishizuka
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Hidekazu Tanaka
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Makiko Kano
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
| | - Takeshi Yamanobe
- Division of Molecular Science
- Faculty of Science and Technology
- Gunma University
- Kiryu
- Japan
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Visaveliya N, Köhler JM. Microfluidic Assisted Synthesis of Multipurpose Polymer Nanoassembly Particles for Fluorescence, LSPR, and SERS Activities. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:6435-6443. [PMID: 26514575 DOI: 10.1002/smll.201502364] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 09/25/2015] [Indexed: 06/05/2023]
Abstract
Potential biomedical applications such as controlled delivery with sustained drug release profile demand for multifunctional polymeric particles of precise chemical composition and with welldefined physicochemical properties. The real challenge is to obtain the reproducible and homogeneous nanoparticles in a minimum number of preparation steps. Here, single-step nanoarchitectures of soft surface layered copolymer nanoparticles with a regular tuning in the size via micro flow-through assisted synthesis are reported. Interfacial copolymerization induces the controlled compartmentalization where a hydrophobic core adopts spherical shape in order to minimize the surface energy and simultaneously shelter in the hydrophilic shelllike surface layer. Surface layer can swell in the aqueous medium and allow controlled entrapping of functional hydrophobic nanoparticles in the hydrophilic interior via electrostatic interaction which can be particularly interesting for combined fluorescence activity. Furthermore, the nanoarchitecture of size and concentration controlled polymer-metal nanoassembly particles can be implemented as an ideal surface-enhanced Raman scattering substrate for detection of the trace amounts of various analytes.
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Affiliation(s)
- Nikunjkumar Visaveliya
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, Weimarer Strasse 32, 98693, Ilmenau, Germany
| | - J Michael Köhler
- Department of Physical Chemistry and Microreaction Technology, Technical University of Ilmenau, Weimarer Strasse 32, 98693, Ilmenau, Germany
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