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Park JE, Jeon J, Park SJ, Won S, Ku Z, Wie JJ. On-Demand Dynamic Chirality Selection in Flower Corolla-like Micropillar Arrays. ACS NANO 2022; 16:18101-18109. [PMID: 36282603 DOI: 10.1021/acsnano.2c04825] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chiral morphology has been intensively studied in various fields including biology, organic chemistry, pharmaceuticals, and optics. On-demand and dynamic chiral inversion not only cannot be realized in most intrinsically chiral materials but also has mostly been limited to chemical or light-induced methods. Herein, we report reversible real-time magneto-mechanical chiral inversion of a three-dimensional (3D) micropillar array between achiral, clockwise, and counterclockwise chiral arrangements. Inspired by the flower corolla, achiral arrays of five and six radially arranged semicylindrical micropillars were employed as model systems to investigate the dynamic symmetry properties of arrays consisting of odd and even numbers of micropillars, respectively. Each micropillar underwent twisting actuation with a different twisting angle depending on the angle with the magnetic field direction and magnetic flux density, thereby collectively changing the chirality from the achiral to chiral state. Importantly, the morphological handedness of the micropillars was inverted within a few seconds by manipulating the direction of the magnetic field. A chiral morphology consisting of magnetically twisted micropillars was shape-fixed by the introduction of a polymeric binder. This binder could be simply washed off to return the shape-fixed twisted micropillars to their initial straight state. Magnetically programmable and reproducible 3D flower corolla-like micropillar arrays are expected to expand the potential of shape-reconfigurable devices that require real-time chiral manipulation in ambient environments.
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Affiliation(s)
- Jeong Eun Park
- The Research Institute of Industrial Science, Hanyang University, Seoul 04763, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Jisoo Jeon
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sei Jin Park
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 944550, United States
| | - Sukyoung Won
- The Research Institute of Industrial Science, Hanyang University, Seoul 04763, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Zahyun Ku
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Jeong Jae Wie
- Department of Organic and Nano Engineering, Hanyang University, Seoul 04763, Republic of Korea
- Human-Tech Convergence Program, Hanyang University, Seoul 04763, Republic of Korea
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Republic of Korea
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Park JE, Park SJ, Urbas A, Ku Z, Wie JJ. Programmable Stepwise Collective Magnetic Self-Assembly of Micropillar Arrays. ACS NANO 2022; 16:3152-3162. [PMID: 35099934 DOI: 10.1021/acsnano.1c10844] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chain-like magnetic self-organizations have been documented for micron/submicron-scale magnetic particles. However, the positions of the particles are not stationary in a sustaining fluid owing to Brownian translational motion, resulting in irregular magnetic self-assembly. Toward the development of a programmable and reversible magnetic self-assembly, we report a stepwise collective magnetic self-assembly with periodic polymeric micropillar arrays containing magnetic particles. Under an external magnetic field, the individual micropillar acts as a micromagnet; magnetic polarities of embedded ferromagnetic particles are arranged in the same direction. The nearest pillar tops undergo a pairwise assembly owing to the anisotropic quadrupolar interaction, whereas the pillar bases remain stationary because of the presence of a magnetically inert substrate. By increasing the magnetic flux density, a collective quad-body assembly of vicinal paired micropillars is accomplished, finally leading to long-range connectivity of the pillar tops. Simple evaporation of the polymeric solution yields shape-fixation of the connected micropillar architectures even after magnetic fields are removed. We investigate geometric effects on this stepwise collective magnetic self-assembly using rectangular, square, and circular micropillars. Also, we demonstrate spatially selective magnetic self-assembly (e.g., arbitrary letters) using a masking technique. Finally, we demonstrate on-demand programming of bidirectional liquid spreading through long-range ordered magnetic self-assembly.
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Affiliation(s)
- Jeong Eun Park
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sei Jin Park
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 944550, United States
| | - Augustine Urbas
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, Ohio 45433, United States
| | - Zahyun Ku
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, Ohio 45433, United States
| | - Jeong Jae Wie
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea
- Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
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Pareek D, Roach KG, Gonzalez MA, Büsing L, Parisi J, Gütay L, Schäfer S. Micro-patterned deposition of MoS 2 ultrathin-films by a controlled droplet dragging approach. Sci Rep 2021; 11:13993. [PMID: 34234194 PMCID: PMC8263556 DOI: 10.1038/s41598-021-93278-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/16/2021] [Indexed: 01/19/2023] Open
Abstract
Micropatterning of transition metal dichalcogenide (TMDC) ultrathin-films and monolayers has been demonstrated by various multi-step approaches. However, directly achieving a patterned growth of TMDC films is still considered to be challenging. Here, we report a solution-based approach for the synthesis of patterned MoS2 layers by dragging a precursor solution droplet with variable velocities across a substrate. Utilizing the pronounced shearing velocity dependence in a Landau-Levich deposition regime, MoS2 films with a spatially modulated thickness with alternating mono/bi- and few-layer regions are obtained after precursor annealing. Generally, the presented facile methodology allows for the direct preparation of micro-structured functional materials, extendable to other TMDC materials and even van der Waals heterostructures.
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Affiliation(s)
- Devendra Pareek
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Kathryna G Roach
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Marco A Gonzalez
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Lukas Büsing
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Jürgen Parisi
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Levent Gütay
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany.
| | - Sascha Schäfer
- Ultrafast Nanoscale Dynamics, Institute of Physics, Carl Von Ossietzky University of Oldenburg, Oldenburg, Germany.
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Park JE, Won S, Cho W, Kim JG, Jhang S, Lee JG, Wie JJ. Fabrication and applications of stimuli‐responsive micro/nanopillar arrays. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jeong Eun Park
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Sukyoung Won
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Woongbi Cho
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Jae Gwang Kim
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Saebohm Jhang
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Jae Gyeong Lee
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
| | - Jeong Jae Wie
- Department of Polymer Science and Engineering Inha University Incheon 22212 Republic of Korea
- Program in Environmental and Polymer Engineering Inha University Incheon 22212 Republic of Korea
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Pan S, Peng J, Lin Z. Large‐Scale Rapid Positioning of Hierarchical Assemblies of Conjugated Polymers via Meniscus‐Assisted Self‐Assembly. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101272] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shuang Pan
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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Pan S, Peng J, Lin Z. Large-Scale Rapid Positioning of Hierarchical Assemblies of Conjugated Polymers via Meniscus-Assisted Self-Assembly. Angew Chem Int Ed Engl 2021; 60:11751-11757. [PMID: 33650301 DOI: 10.1002/anie.202101272] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/23/2021] [Indexed: 02/04/2023]
Abstract
Rapid and deliberate patterning of nanomaterials over a large area is desirable for device manufacturing. We report a method for meniscus-assisted self-assembly (MASA)-enabled rapid positioning of hierarchically assembled dots and stripes composed of luminescent conjugated polymer over two length scales. Periodically arranged conjugated poly(9,9-dioctylfluorene) (PFO) polymers, yield dots, punch-holes and stripes at microscopic scale via MASA. Concurrent self-assembly of PFOs into two-dimensional lenticular crystals within each dot, punch-hole and stripe is realized at nanoscopic scale. Hierarchical assembly is achieved by constraining the evaporation of the PFOs solution in two approximately parallel plates via a MASA process. The three-phase contact line (TCL) of the liquid meniscus of the PFOs was printed using the upper plate, yielding an array of curved stripes. Rapid creation of hierarchical assemblies via MASA opens up possibilities for large-scale organization of a wide range of soft matters and nanomaterials.
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Affiliation(s)
- Shuang Pan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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Rejinold NS, Choi G, Choy JH. Recent Developments on Semiconducting Polymer Nanoparticles as Smart Photo-Therapeutic Agents for Cancer Treatments-A Review. Polymers (Basel) 2021; 13:981. [PMID: 33806912 PMCID: PMC8004612 DOI: 10.3390/polym13060981] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/19/2021] [Accepted: 03/19/2021] [Indexed: 02/07/2023] Open
Abstract
Semiconducting polymer nanoparticles (SPN) have been emerging as novel functional nano materials for phototherapy which includes PTT (photo-thermal therapy), PDT (photodynamic therapy), and their combination. Therefore, it is important to look into their recent developments and further explorations specifically in cancer treatment. Therefore, the present review describes novel semiconducting polymers at the nanoscale, along with their applications and limitations with a specific emphasis on future perspectives. Special focus is given on emerging and trending semiconducting polymeric nanoparticles in this review based on the research findings that have been published mostly within the last five years.
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Affiliation(s)
- N. Sanoj Rejinold
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea; (N.S.R.); (G.C.)
| | - Goeun Choi
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea; (N.S.R.); (G.C.)
- College of Science and Technology, Dankook University, Cheonan 31116, Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Korea
| | - Jin-Ho Choy
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea; (N.S.R.); (G.C.)
- Department of Pre-medical Course, College of Medicine, Dankook University, Cheonan 31116, Korea
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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