1
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Kumar L, Horechyy A, Paturej J, Nandan B, Kłos JS, Sommer JU, Fery A. Encapsulation of Nanoparticles into Preformed Block Copolymer Micelles Driven by Competitive Solvation: Experimental Studies and Molecular Dynamic Simulations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Labeesh Kumar
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
| | - Andriy Horechyy
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
| | - Jarosław Paturej
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Institute of Physics, University of Silesia, Chorzów, 41-500, Poland
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Jarosław S. Kłos
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Faculty of Physics, A. Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614Poznań, Poland
| | - Jens-Uwe Sommer
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Institute for Theoretical Physics, Technische Universität Dresden, Dresden01062, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069Dresden, Germany
- Physical Chemistry of Polymer Materials, Technische Universität Dresden, Dresden01062, Germany
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2
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Choi IS, Park S, Jeon S, Kwon YW, Park R, Taylor RA, Kyhm K, Hong SW. Strain-tunable optical microlens arrays with deformable wrinkles for spatially coordinated image projection on a security substrate. MICROSYSTEMS & NANOENGINEERING 2022; 8:98. [PMID: 36119375 PMCID: PMC9474807 DOI: 10.1038/s41378-022-00399-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 03/03/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
As a new concept in materials design, a variety of strategies have been developed to fabricate optical microlens arrays (MLAs) that enable the miniaturization of optical systems on the micro/nanoscale to improve their characteristic performance with unique optical functionality. In this paper, we introduce a cost-effective and facile fabrication process on a large scale up to ~15 inches via sequential lithographic methods to produce thin and deformable hexagonally arranged MLAs consisting of polydimethylsiloxane (PDMS). Simple employment of oxygen plasma treatment on the prestrained MLAs effectively harnessed the spontaneous formation of highly uniform nanowrinkled structures all over the surface of the elastomeric microlenses. With strain-controlled tunability, unexpected optical diffraction patterns were characterized by the interference combination effect of the microlens and deformable nanowrinkles. Consequently, the hierarchically structured MLAs presented here have the potential to produce desirable spatial arrangements, which may provide easily accessible opportunities to realize microlens-based technology by tunable focal lengths for more advanced micro-optical devices and imaging projection elements on unconventional security substrates.
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Affiliation(s)
- In Sik Choi
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241 Republic of Korea
| | - Seongho Park
- Research Center for Dielectric and Advanced Matter Physics, Pusan National University, Busan, 46241 Republic of Korea
- Department of Physics, University of Oxford, Oxford, OX1 3PU UK
| | - Sangheon Jeon
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241 Republic of Korea
| | - Young Woo Kwon
- Department of Nano-Fusion Technology, Pusan National University, Busan, 46241 Republic of Korea
| | - Rowoon Park
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241 Republic of Korea
| | | | - Kwangseuk Kyhm
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241 Republic of Korea
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241 Republic of Korea
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3
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Lei P, Li Y, Song X, Hao Y, Deng Z. DNA‐Programmable AgAuS‐Primed Conductive Nanowelding Wires‐Up Wet Colloids. Angew Chem Int Ed Engl 2022; 61:e202203568. [DOI: 10.1002/anie.202203568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Indexed: 12/11/2022]
Affiliation(s)
- Pengcheng Lei
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yanjuan Li
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Xiaojun Song
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yan Hao
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Zhaoxiang Deng
- Center for Bioanalytical Chemistry Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
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4
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Lei P, Li Y, Song X, Hao Y, Deng Z. DNA‐Programmable AgAuS‐Primed Conductive Nanowelding Wires up Wet Colloids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pengcheng Lei
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yanjuan Li
- University of Science and Technology of China Department of Chemistry CHINA
| | - Xiaojun Song
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yan Hao
- University of Science and Technology of China Department of Chemistry CHINA
| | - Zhaoxiang Deng
- University of Science and Technology of China Department of Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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5
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Valdez S, Robertson M, Qiang Z. Fluorescence Resonance Energy Transfer Measurements in Polymer Science: A Review. Macromol Rapid Commun 2022; 43:e2200421. [PMID: 35689335 DOI: 10.1002/marc.202200421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/06/2022] [Indexed: 12/27/2022]
Abstract
Fluorescence resonance energy transfer (FRET) is a non-invasive characterization method for studying molecular structures and dynamics, providing high spatial resolution at nanometer scale. Over the past decades, FRET-based measurements are developed and widely implemented in synthetic polymer systems for understanding and detecting a variety of nanoscale phenomena, enabling significant advances in polymer science. In this review, the basic principles of fluorescence and FRET are briefly discussed. Several representative research areas are highlighted, where FRET spectroscopy and imaging can be employed to reveal polymer morphology and kinetics. These examples include understanding polymer micelle formation and stability, detecting guest molecule release from polymer host, characterizing supramolecular assembly, imaging composite interfaces, and determining polymer chain conformations and their diffusion kinetics. Finally, a perspective on the opportunities of FRET-based measurements is provided for further allowing their greater contributions in this exciting area.
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Affiliation(s)
- Sara Valdez
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Mark Robertson
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Zhe Qiang
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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6
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Khanal BP, Zubarev ER. Self-Assembly of Nanocrystals into Ring-like Superstructures: When Shape, Size, and Material Do Not Matter. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3896-3906. [PMID: 35298173 DOI: 10.1021/acs.langmuir.2c00153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This manuscript describes a universal method for the spontaneous self-assembly of nanostructures ranging from 2-4 nm spherical particles to ∼440 nm long anisotropic nanorods into ring-like superstructures. The nanostructures composed of Au, Pt, and Pd as surface materials were synthesized in an aqueous cetyltrimethyl ammonium bromide (CTAB) solution. The ligand exchange technique with 4-mercaptophenol was applied to replace CTAB from the surface of nanostructures with a functional thiol. The esterification reaction was carried out to covalently attach carboxy-terminated long-chain polystyrene (PS) molecules to the surface of nanostructures. The high grafting density of PS chains around nanocrystals made them highly soluble in a wide range of organic solvents. When a drop of nanostructure solution in a volatile nonpolar solvent was dried on a solid surface, the nanostructures spontaneously arranged themselves in the form of ring-like assemblies. The condensation of microscopic water droplets from the atmosphere on the surface of an evaporating solvent creates templates for the self-assembly of nanostructures into rings. We demonstrate that this self-assembly method is highly universal and can be extended to various nanostructures regardless of their shapes, sizes, and surface materials.
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Affiliation(s)
- Bishnu P Khanal
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Eugene R Zubarev
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
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7
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Liu H, Wang Y, Luo Y, Guo M, Feng Y, Liu M. Tunable coffee-ring formation of halloysite nanotubes by evaporating sessile drops. SOFT MATTER 2021; 17:9514-9527. [PMID: 34617549 DOI: 10.1039/d1sm01150b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Halloysite nanotubes (HNTs) are one-dimensional clay nanomaterials with a length of 200-1000 nm and a diameter of ∼50 nm. Understanding the self-assembly behavior of such unique nanoparticles is important to develop their applications in functional devices. In this study, the "coffee-ring" patterns of HNTs are investigated which are formed by evaporation of the sessile droplets of HNT aqueous dispersion on different substrates. The coffee-ring pattern with various dimensions was characterized using a polarizing microscope (POM), a scanning electron microscope (SEM), and a 3D optical profilometer. The diameter, height, and area of the coffee-ring patterns depend on the concentration of HNT dispersion, the droplet volume, and surface wettability. POM and SEM results suggested that the nanotubes were highly ordered in the edge and the middle of the coffee-ring. The coffee-ring effect of HNTs could be suppressed by increasing the evaporation temperature of substrates or adding polymer additives. In addition, multiple-ring patterns consistent with protein rings surrounding HNT rings were formed, which can be utilized to detect the presence of proteins in biological samples. This work illustrated the relationship between the formation of coffee-ring patterns and the experimental conditions, which provided an additional research chance and allowed application development for HNTs using the liquid droplet self-assembly.
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Affiliation(s)
- Hongzhong Liu
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yao Wang
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yumin Luo
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Min Guo
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Yue Feng
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
| | - Mingxian Liu
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China.
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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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9
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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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11
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Jeon J, Tan ATL, Lee J, Park JE, Won S, Kim S, Bedewy M, Go J, Kim JK, Hart AJ, Wie JJ. High-Speed Production of Crystalline Semiconducting Polymer Line Arrays by Meniscus Oscillation Self-Assembly. ACS NANO 2020; 14:17254-17261. [PMID: 33232120 DOI: 10.1021/acsnano.0c07268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Evaporative self-assembly of semiconducting polymers is a low-cost route to fabricating micrometer and nanoscale features for use in organic and flexible electronic devices. However, in most cases, rate is limited by the kinetics of solvent evaporation, and it is challenging to achieve uniformity over length- and time-scales that are compelling for manufacturing scale-up. In this study, we report high-throughput, continuous printing of poly(3-hexylthiophene) (P3HT) by a modified doctor blading technique with oscillatory meniscus motion-meniscus-oscillated self-assembly (MOSA), which forms P3HT features ∼100 times faster than previously reported techniques. The meniscus is pinned to a roller, and the oscillatory meniscus motion of the roller generates repetitive cycles of contact-line formation and subsequent slip. The printed P3HT lines demonstrate reproducible and tailorable structures: nanometer scale thickness, micrometer scale width, submillimeter pattern intervals, and millimeter-to-centimeter scale coverage with highly defined boundaries. The line width as well as interval of P3HT patterns can be independently controlled by varying the polymer concentration levels and the rotation rate of the roller. Furthermore, grazing incidence wide-angle X-ray scattering (GIWAXS) reveals that this dynamic meniscus control technique dramatically enhances the crystallinity of P3HT. The MOSA process can potentially be applied to other geometries, and to a wide range of solution-based precursors, and therefore will develop for practical applications in printed electronics.
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Affiliation(s)
- Jisoo Jeon
- 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
| | - Alvin T L Tan
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jaeyong Lee
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 37673, Republic of Korea
| | - 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
| | - Sanha Kim
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mostafa Bedewy
- Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Jamison Go
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jin Kon Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 37673, Republic of Korea
| | - A John Hart
- Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, 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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Zhang K, Oldenhof S, Wang Y, Esch JH, Mendes E. Spatial Manipulation and Integration of Supramolecular Filaments on Hydrogel Substrates towards Advanced Soft Devices. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kai Zhang
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Sander Oldenhof
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
- Netherlands Forensic Institute Laan van Ypenburg 6 2497 GB Den Haag The Netherlands
| | - Yiming Wang
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
- State Key Laboratory of Chemical Engineering East China University of Science and Technology Meilong Road 130 200237 Shanghai China
| | - Jan H. Esch
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Eduardo Mendes
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
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Zhang K, Oldenhof S, Wang Y, Esch JH, Mendes E. Spatial Manipulation and Integration of Supramolecular Filaments on Hydrogel Substrates towards Advanced Soft Devices. Angew Chem Int Ed Engl 2020; 59:8601-8607. [DOI: 10.1002/anie.201915100] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Kai Zhang
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Sander Oldenhof
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
- Netherlands Forensic Institute Laan van Ypenburg 6 2497 GB Den Haag The Netherlands
| | - Yiming Wang
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
- State Key Laboratory of Chemical Engineering East China University of Science and Technology Meilong Road 130 200237 Shanghai China
| | - Jan H. Esch
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Eduardo Mendes
- Department of Chemical Engineering Deflt University of Technology van der Maasweg 9 2629 HZ Delft The Netherlands
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Lithography-Free Route to Hierarchical Structuring of High-χ Block Copolymers on a Gradient Patterned Surface. MATERIALS 2020; 13:ma13020304. [PMID: 31936578 PMCID: PMC7013446 DOI: 10.3390/ma13020304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/05/2020] [Accepted: 01/08/2020] [Indexed: 12/03/2022]
Abstract
A chemically defined patterned surface was created via a combined process of controlled evaporative self-assembly of concentric polymer stripes and the selective surface modification of polymer brush. The former process involved physical adsorption of poly (methyl methacrylate) (PMMA) segments into silicon oxide surface, thus forming ultrathin PMMA stripes, whereas the latter process was based on the brush treatment of silicon native oxide surface using a hydroxyl-terminated polystyrene (PS-OH). The resulting alternating PMMA- and PS-rich stripes provided energetically favorable regions for self-assembly of high χ polystyrene-block-polydimethylsiloxane (PS-b-PDMS) in a simple and facile manner, dispensing the need for conventional lithography techniques. Subsequently, deep reactive ion etching and oxygen plasma treatment enabled the transition of the PDMS blocks into oxidized groove-shaped nanostructures.
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Ni B, Yin Y, Peng J. A Simple Route to Hierarchical Rings of Diblock Copolymer Micelles. Macromol Rapid Commun 2019; 41:e1900525. [PMID: 31778248 DOI: 10.1002/marc.201900525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/25/2019] [Indexed: 11/07/2022]
Abstract
A hierarchically assembled necklace composed of amphiphilic diblock copolymer micelles is exquisitely produced by capitalizing on two concurrent self-assembly processes at different scales (i.e., "breath figure" strategy of diblock copolymer micelles solution evaporating in humid air to yield rings at the microscopic scale in conjunction with self-assembly of diblock copolymer micelles within individual ring at the nanometer scale). Intriguingly, hierarchical rings of diblock copolymer micelles comprising gold precursors or fluorescent dyes can also be crafted using this strategy. Upon exposure to hydrophilic block-selective solvent, core-corona inversion of micelles within the microscopic rings occurs. In contrast, such inversion is inhibited when the micelles are impregnated by gold precursors. This simple yet effective strategy for engineering diblock copolymer micelles may be extended to produce hierarchically assembled structures consisting of other functional block copolymers (e.g., stimuli-responsive block copolymer) and nanocrystals (e.g., semiconducting, magnetic, ferroelectric, etc.) with unique catalytic, magnetic, ferroelectric, optical, electronic, and optoelectronic properties.
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Affiliation(s)
- Bijun Ni
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Yue Yin
- 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
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16
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Shin JI, Cho SJ, Jeon J, Lee KH, Wie JJ. Three-dimensional micropatterning of semiconducting polymers via capillary force-assisted evaporative self-assembly. SOFT MATTER 2019; 15:3854-3863. [PMID: 31062802 DOI: 10.1039/c9sm00478e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Controlled evaporative self-assembly of semiconducting polymers has mostly been studied on 2-dimensional flat substrates. In this study, we reported capillary-assisted evaporative self-assembly of poly(3-hexylthiophene 2,5-diyl) (P3HT) into 3-D micro-ring patterns through the stick-slip phenomenon within a 3-dimensional cylinder. We deconvoluted the well-known two-step stick-slip phenomenon into three regimes through in situ monitoring of the P3HT self-assembly process using a high-speed camera: pinning and deposition; depinning and slip; and retraction regimes. Furthermore, we investigated the effects of various parameters associated with the self-assembly, including polymer concentration, tilt angle, magnetic field, and evaporation temperature, thus achieving self-assembled microarchitectures with diverse dimensions ranging from dots to lines and networks. The self-assembled microstructures were analyzed qualitatively and quantitatively by evaluating the fast Fourier transform image, surface coverage, fractal dimension and lacunarity of the micropatterns.
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Affiliation(s)
- Jae In Shin
- Department of Polymer Science and Engineering, Inha University, Incheon 22212, South Korea.
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17
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Jiang B, Iocozzia J, Zhao L, Zhang H, Harn YW, Chen Y, Lin Z. Barium titanate at the nanoscale: controlled synthesis and dielectric and ferroelectric properties. Chem Soc Rev 2019; 48:1194-1228. [PMID: 30663742 DOI: 10.1039/c8cs00583d] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The current trend in the miniaturization of electronic devices has driven the investigation into many nanostructured materials. The ferroelectric material barium titanate (BaTiO3) has garnered considerable attention over the past decade owing to its excellent dielectric and ferroelectric properties. This has led to significant progress in synthetic techniques that yield high quality BaTiO3 nanocrystals (NCs) with well-defined morphologies (e.g., nanoparticles, nanorods, nanocubes and nanowires) and controlled crystal phases (e.g., cubic, tetragonal and multi-phase). The ability to produce nanoscale BaTiO3 with controlled properties enables theoretical and experimental studies on the intriguing yet complex dielectric properties of individual BaTiO3 NCs as well as BaTiO3/polymer nanocomposites. Compared with polymer-free individual BaTiO3 NCs, BaTiO3/polymer nanocomposites possess several advantages. The polymeric component enables simple solution processibility, high breakdown strength and light weight for device scalability. The BaTiO3 component enables a high dielectric constant. In this review, we highlight recent advances in the synthesis of high-quality BaTiO3 NCs via a variety of chemical approaches including organometallic, solvothermal/hydrothermal, templating, molten salt, and sol-gel methods. We also summarize the dielectric and ferroelectric properties of individual BaTiO3 NCs and devices based on BaTiO3 NCs via theoretical modeling and experimental piezoresponse force microscopy (PFM) studies. In addition, viable synthetic strategies for novel BaTiO3/polymer nanocomposites and their structure-composition-performance relationship are discussed. Lastly, a perspective on the future direction of nanostructured BaTiO3-based materials is presented.
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Affiliation(s)
- Beibei Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - James Iocozzia
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Lei Zhao
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Hefeng Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yeu-Wei Harn
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Yihuang Chen
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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18
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Kim DO, Pack M, Rokoni A, Kaneelil P, Sun Y. The effect of particle wettability on the stick-slip motion of the contact line. SOFT MATTER 2018; 14:9599-9608. [PMID: 30457136 DOI: 10.1039/c8sm02129e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Contact line dynamics is crucial in determining the deposition patterns of evaporating colloidal droplets. Using high-speed interferometry, we directly observe the stick-slip motion of the contact line in situ and are able to resolve the instantaneous shape of the inkjet-printed, evaporating pico-liter drops containing nanoparticles of varying wettability. Integrated with post-mortem optical profilometry of the deposition patterns, the instantaneous particle volume fraction and hence the particle deposition rate can be determined. The results show that the stick-slip motion of the contact line is a strong function of the particle wettability. While the stick-slip motion is observed for nanoparticles that are less hydrophilic (i.e., particle contact angle θ ≈ 74° at the water-air interface), which results in a multiring deposition, a continuous receding of the contact line is observed for more hydrophilic nanoparticles (i.e., θ ≈ 34°), which leaves a single-ring pattern. A model is developed to predict the number of particles required to pin the contact line based on the force balance of the hydrodynamic drag, interparticle interactions, and surface tension acting on the particles near the contact line with varying particle wettability. A three-fold increase in the number of particles required for pinning is predicted when the particle wettability increases from the wetting angle of θ ≈ 74° to θ ≈ 34°. This finding explains why particles with greater wettability form a single-ring pattern and those with lower wettability form a multi-ring pattern. In addition, the particle deposition rate is found to depend on the particle wettability and vary with time.
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Affiliation(s)
- Dong-Ook Kim
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA, USA.
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19
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Qu G, Kwok JJ, Mohammadi E, Zhang F, Diao Y. Understanding Film-To-Stripe Transition of Conjugated Polymers Driven by Meniscus Instability. ACS APPLIED MATERIALS & INTERFACES 2018; 10:40692-40701. [PMID: 30375845 DOI: 10.1021/acsami.8b13790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Meniscus instability during meniscus-guided solution coating and printing of conjugated polymers has a significant impact on the deposit morphology and the charge-transport characteristics. The lack of quantitative investigation on meniscus-instability-induced morphology transition for conjugated polymers hindered the ability to precisely control conjugated polymer deposition for desired applications. Herein, we report a film-to-stripe morphology transition caused by stick-and-slip meniscus instability during solution coating seen in multiple donor-acceptor polymer systems. We observe the coexistence of film and stripe morphologies at the critical coating speed. Surprisingly, higher charge-carrier mobility is measured in transistors fabricated from stripes despite their same deposition condition as the films at the critical speed. To understand the origin of the morphology transition, we further construct a generalizable surface free energy model to validate the hypothesis that the morphology transition occurs to minimize the system surface free energy. As the system surface free energy varies during a stick-and-slip cycle, we focus on evaluating the maximum surface free energy at a given condition, which corresponds to the sticking state right before slipping. Indeed, we observe the increase of the maximum system surface free energy with the increase in coating speed prior to film-to-stripe morphology transition and an abrupt drop in the maximum system surface free energy post-transition when the coating speed is further increased, which is associated with the reduced meniscus length during stripe deposition. Such an energetic change originates from the competition between pinning and depinning forces on a partial wetting substrate which underpins the film-to-stripe transition. This work establishes a quantitative approach for understanding meniscus-instability-induced morphology transition during solution coating. The mechanistic understanding may further facilitate the use of meniscus instability for lithography-free patterning or to suppress instability for highly homogeneous thin film deposition.
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Affiliation(s)
- Ge Qu
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Justin J Kwok
- Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , 1304 W. Green Street , Urbana , Illinois 61801 , United States
| | - Erfan Mohammadi
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Fengjiao Zhang
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Ying Diao
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
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20
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Qiu F, Chen Y, Tang C, Zhao X. Amphiphilic peptides as novel nanomaterials: design, self-assembly and application. Int J Nanomedicine 2018; 13:5003-5022. [PMID: 30214203 PMCID: PMC6128269 DOI: 10.2147/ijn.s166403] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Designer self-assembling peptides are a category of emerging nanobiomaterials which have been widely investigated in the past decades. In this field, amphiphilic peptides have received special attention for their simplicity in design and versatility in application. This review focuses on recent progress in designer amphiphilic peptides, trying to give a comprehensive overview about this special type of self-assembling peptides. By exploring published studies on several typical types of amphiphilic peptides in recent years, herein we discuss in detail the basic design, self-assembling behaviors and the mechanism of amphiphilic peptides, as well as how their nanostructures are affected by the peptide characteristics or environmental parameters. The applications of these peptides as potential nanomaterials for nanomedicine and nanotechnology are also summarized.
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Affiliation(s)
- Feng Qiu
- Laboratory of Anaesthesia and Critical Care Medicine, Translational Neuroscience Centre, West China Hospital, Sichuan University, Chengdu 610041, China, .,Institute for Nanobiomedical Technology and Membrane Biology, West China Hospital, Sichuan University, Chengdu 610041, China, ,
| | - Yongzhu Chen
- Institute for Nanobiomedical Technology and Membrane Biology, West China Hospital, Sichuan University, Chengdu 610041, China, , .,Periodical Press of West China Hospital, Sichuan University, Chengdu 610041, China
| | - Chengkang Tang
- Institute for Nanobiomedical Technology and Membrane Biology, West China Hospital, Sichuan University, Chengdu 610041, China, , .,Core Facility of West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiaojun Zhao
- Institute for Nanobiomedical Technology and Membrane Biology, West China Hospital, Sichuan University, Chengdu 610041, China, ,
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21
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Park R, Kim H, Lone S, Jeon S, Kwon YW, Shin B, Hong SW. One-Step Laser Patterned Highly Uniform Reduced Graphene Oxide Thin Films for Circuit-Enabled Tattoo and Flexible Humidity Sensor Application. SENSORS 2018; 18:s18061857. [PMID: 29882824 PMCID: PMC6021857 DOI: 10.3390/s18061857] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 01/28/2023]
Abstract
The conversion of graphene oxide (GO) into reduced graphene oxide (rGO) is imperative for the electronic device applications of graphene-based materials. Efficient and cost-effective fabrication of highly uniform GO films and the successive reduction into rGO on a large area is still a cumbersome task through conventional protocols. Improved film casting of GO sheets on a polymeric substrate with quick and green reduction processes has a potential that may establish a path to the practical flexible electronics. Herein, we report a facile deposition process of GO on flexible polymer substrates to create highly uniform thin films over a large area by a flow-enabled self-assembly approach. The self-assembly of GO sheets was successfully performed by dragging the trapped solution of GO in confined geometry, which consisted of an upper stationary blade and a lower moving substrate on a motorized translational stage. The prepared GO thin films could be selectively reduced and facilitated from the simple laser direct writing process for programmable circuit printing with the desired configuration and less sample damage due to the non-contact mode operation without the use of photolithography, toxic chemistry, or high-temperature reduction methods. Furthermore, two different modes of the laser operating system for the reduction of GO films turned out to be valuable for the construction of novel graphene-based high-throughput electrical circuit boards compatible with integrating electronic module chips and flexible humidity sensors.
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Affiliation(s)
- Rowoon Park
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Hyesu Kim
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Saifullah Lone
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Sangheon Jeon
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Young Woo Kwon
- Department of Nano-Fusion Technology, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Bosung Shin
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea.
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22
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Dias CS, Yunker PJ, Yodh AG, Araújo NAM, Telo da Gama MM. Interaction anisotropy and the KPZ to KPZQ transition in particle deposition at the edges of drying drops. SOFT MATTER 2018; 14:1903-1907. [PMID: 29465724 DOI: 10.1039/c7sm02136d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The deposition process at the edge of evaporating colloidal drops varies with the shape of suspended particles. Experiments with prolate ellipsoidal particles suggest that the spatiotemporal properties of the deposit depend strongly on particle aspect ratio. As the aspect ratio increases, the particles form less densely-packed deposits and the statistical behavior of the deposit interface crosses over from the Kardar-Parisi-Zhang (KPZ) universality class to another universality class which was suggested to be consistent with the KPZ plus quenched disorder. Here, we numerically study the effect of particle interaction anisotropy on deposit growth. In essence, we model the ellipsoids, at the interface, as disk-like particles with two types of interaction patches that correspond to specific features at the poles and equator of the ellipsoid. The numerical results corroborate experimental observations and further suggest that the deposition transition can stem from interparticle interaction anisotropy. Possible extensions of our model to other systems are also discussed.
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Affiliation(s)
- C S Dias
- Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
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23
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Li X, Li B, He M, Wang W, Wang T, Wang A, Yu J, Wang Z, Hong SW, Byun M, Lin S, Yu H, Lin Z. Convenient and Robust Route to Photoswitchable Hierarchical Liquid Crystal Polymer Stripes via Flow-Enabled Self-Assembly. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4961-4970. [PMID: 29308640 DOI: 10.1021/acsami.7b16001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Hierarchically arranged stripes of photoswitchable liquid crystal polymers (LCPs) containing azobenzene moieties were conveniently crafted via a flow-enabled self-assembly (FESA). Interestingly, by subjecting a drop of LCP solution to dry in a restricted geometry comprising two nearly parallel plates with a stationary upper plate and a movable lower plate that programmably traveled in a "stop-and-move" manner during the FESA process, photoswitchable LCP stripes were yielded, displaying two modes of deposition, namely, periodic primary stripes of large dimensions and regularly spaced secondary stripes of small dimensions situated between adjacent primary stripes (i.e., forming hierarchical LCP stripes). Notably, these hierarchical azobenzene moieties-containing stripes demonstrated sequential photoinduced reversible phase transition (i.e., photoswitching) due to the thickness difference between primary and secondary stripes. A UV light-induced expansion effect was observed on the LCP stripes. Clearly, such rapid creation of hierarchical stripes by FESA represents a robust means of organizing polymers, nanoparticles, colloids, DNA, etc. into complex yet ordered patterns over a large area in a simple and controllable manner for potential use in surface relief grating, photoactuators, photoswitchable devices, antifake labels, etc.
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Affiliation(s)
- Xiao Li
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Bo Li
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Ming He
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Wei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
- School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P. R. China
| | - Tianjie Wang
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Aurelia Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Jiwoo Yu
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Zhonglin Wang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University , Busan 46241, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University , Daegu 704-701, Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, P. R. China
| | - Haifeng Yu
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University , Beijing 100871, P. R. China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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24
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Kabi P, Chaudhuri S, Basu S. Micro to Nanoscale Engineering of Surface Precipitates Using Reconfigurable Contact Lines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2109-2120. [PMID: 29345953 DOI: 10.1021/acs.langmuir.7b04368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanoscale engineering has traditionally adopted the chemical route of synthesis or optochemical techniques such as lithography requiring large process times, expensive equipment, and an inert environment. Directed self-assembly using evaporation of nanocolloidal droplet can be a potential low-cost alternative across various industries ranging from semiconductors to biomedical systems. It is relatively simple to scale and reorient the evaporation-driven internal flow field in an evaporating droplet which can direct dispersed matter into functional agglomerates. The resulting functional precipitates not only exhibit macroscopically discernible changes but also nanoscopic variations in the particulate assembly. Thus, the evaporating droplet forms an autonomous system for nanoscale engineering without the need for external resources. In this article, an indigenous technique of interfacial re-engineering, which is both simple and inexpensive to implement, is developed. Such re-engineering widens the horizon for surface patterning previously limited by the fixed nature of the droplet interface. It involves handprinting hydrophobic lines on a hydrophilic substrate to form a confinement of any selected geometry using a simple document stamp. Droplets cast into such confinements get modulated into a variety of shapes. The droplet shapes control the contact line behavior, evaporation dynamics, and complex internal flow pattern. By exploiting the dynamic interplay among these variables, we could control the deposit's macro- as well as nanoscale assembly not possible with simple circular droplets. We provide a detailed mechanism of the coupling at various length scales enabling a predictive capability in custom engineering, particularly useful in nanoscale applications such as photonic crystals.
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Affiliation(s)
- Prasenjit Kabi
- Interdisciplinary Centre for Energy Research, ‡Department of Mechanical Engineering, and §Department of Aerospace Engineering, Indian Institute of Science , Bangalore, Karnataka 560012, India
| | - Swetaprovo Chaudhuri
- Interdisciplinary Centre for Energy Research, ‡Department of Mechanical Engineering, and §Department of Aerospace Engineering, Indian Institute of Science , Bangalore, Karnataka 560012, India
| | - Saptarshi Basu
- Interdisciplinary Centre for Energy Research, ‡Department of Mechanical Engineering, and §Department of Aerospace Engineering, Indian Institute of Science , Bangalore, Karnataka 560012, India
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25
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González-Pizarro DA, Soto-Figueroa C, Rodríguez-Hidalgo MDR, Vicente L. Mesoscopic study of the ternary phase diagram of the PS-PB-PtBMA triblock copolymer: modification of the phase structure by the composition effect. SOFT MATTER 2018; 14:508-520. [PMID: 29265165 DOI: 10.1039/c7sm02132a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We explored in detail the ordered nanostructures and the ternary phase diagram of the polystyrene-polybutadiene-poly(tert-butyl methacrylate) (PS-PB-PtBMA) triblock copolymer via dissipative particle dynamics (DPD) simulations and coarse-grained models. The mesoscopic simulations show that the PS-PB-PtBMA copolymer in the bulk state can generate eight equilibrium phase regions with well-defined morphologies such as core-shell variations of spheres, cylinders, perforated layers, lamellar, gyroid, as well as cylinder-in-lamella, spheres-in-lamella, and cylinders in hexagonal lattice. The ordered phases exhibit high dependence on the chemical nature and volume fraction, thus portraying specific composition regions with high thermodynamic stability over a ternary phase diagram. The ternary phase diagram, including all equilibrium and metastable nanostructures detected, is described, and analysed in this work in detail. Finally, our dynamic simulation outcomes agree with experimental results. Our aim is to contribute to the understanding of the relationship between block volume fractions and bulk morphologies in ternary polymer systems.
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Affiliation(s)
- David Alfredo González-Pizarro
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario s/n, Nuevo Campus Universitario, C.P. 31125, Chihuahua, Mexico
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26
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Li X, Iocozzia J, Chen Y, Zhao S, Cui X, Wang W, Yu H, Lin S, Lin Z. From Precision Synthesis of Block Copolymers to Properties and Applications of Nanoparticles. Angew Chem Int Ed Engl 2018; 57:2046-2070. [DOI: 10.1002/anie.201705019] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/03/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao Li
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 P.R. China
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - James Iocozzia
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yihuang Chen
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Shiqiang Zhao
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xun Cui
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P.R. China
| | - Haifeng Yu
- Department of Material Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 P.R. China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P.R. China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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27
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Li X, Iocozzia J, Chen Y, Zhao S, Cui X, Wang W, Yu H, Lin S, Lin Z. Von der Präzisionssynthese von Blockcopolymeren zu Eigenschaften und Anwendungen von funktionellen Nanopartikeln. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201705019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiao Li
- Department of Material Science and Engineering und Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 Volksrepublik China
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - James Iocozzia
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yihuang Chen
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Shiqiang Zhao
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xun Cui
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 Volksrepublik China
| | - Haifeng Yu
- Department of Material Science and Engineering und Key Laboratory of Polymer Chemistry and Physics of the, Ministry of Education Peking University Beijing 100871 Volksrepublik China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 Volksrepublik China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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28
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Basutkar MN, Samant S, Strzalka J, Yager KG, Singh G, Karim A. Through-Thickness Vertically Ordered Lamellar Block Copolymer Thin Films on Unmodified Quartz with Cold Zone Annealing. NANO LETTERS 2017; 17:7814-7823. [PMID: 29136475 DOI: 10.1021/acs.nanolett.7b04028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Template-free directed self-assembly of ultrathin (approximately tens of nanometers) lamellar block copolymer (l-BCP) films into vertically oriented nanodomains holds much technological relevance for the fabrication of next-generation devices from nanoelectronics to nanomembranes due to domain interconnectivity and high interfacial area. We report for the first time the formation of full through-thickness vertically oriented lamellar domains in 100 nm thin polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) films on quartz substrate, achieved without any PMMA-block wetting layer formation, quartz surface modification (templating chemical, topographical) or system modifications (added surfactant, top-layer coat). Vertical ordering of l-BCPs results from the coupling between a molecular and a macroscopic phenomenon. A molecular relaxation induced vertical l-BCP ordering occurs under a transient macroscopic vertical strain field, imposed by a high film thermal expansion rate under sharp thermal gradient cold zone annealing (CZA-S). The parametric window for vertical ordering is quantified via a coupling constant, C (= v∇T), whose range is established in terms of a thermal gradient (∇T) above a threshold value, and an optimal dynamic sample sweep rate (v ∼ d/τ), where τ is the l-BCP's longest molecular relaxation time and d is the Tg,heat - Tg,cool distance. Real-time CZA-S morphology evolution of vertically oriented l-BCP tracked along ∇T using in situ grazing incidence small angle X-ray scattering (GISAXS) exhibited an initial formation phase of vertical lamellae, a polygrain structure formation stage, and a grain coarsening phase to fully vertically ordered l-BCP morphology development. CZA-S is a roll-to-roll manufacturing method, rendering this template-free through-thickness vertical ordering of l-BCP films highly attractive and industrially relevant.
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Affiliation(s)
- Monali N Basutkar
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Saumil Samant
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Joseph Strzalka
- X-Ray Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Kevin G Yager
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Gurpreet Singh
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Alamgir Karim
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
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29
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Sun Y, Lin Y, Su Z, Wang Q. One-step assembly of multi-layered structures with orthogonally oriented stripe-like patterns on the surface of a capillary tube. Phys Chem Chem Phys 2017; 19:23719-23722. [PMID: 28678262 DOI: 10.1039/c7cp02583a] [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]
Abstract
We developed a robust method to construct large-scale multi-layered assemblies with orthogonally oriented stripes on a capillary tube using a confined evaporative self-assembly (CESA) method. A mixture of conductive polymer poly(3-hexylthiophene) (P3HT) and biocompatible polylactic acid (PLA) was chosen as the model polymer and the molecular chain orientation of P3HT in an individual stripe could be assessed by laser confocal polarization Raman spectroscopy. These structures could provide contact cues to guide the growth of smooth muscle cells for potential tissue engineering applications.
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Affiliation(s)
- Yingjuan Sun
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Changchun, 130022, P. R. China.
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30
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Chen Y, Yang D, Yoon YJ, Pang X, Wang Z, Jung J, He Y, Harn YW, He M, Zhang S, Zhang G, Lin Z. Hairy Uniform Permanently Ligated Hollow Nanoparticles with Precise Dimension Control and Tunable Optical Properties. J Am Chem Soc 2017; 139:12956-12967. [DOI: 10.1021/jacs.7b04545] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yihuang Chen
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Di Yang
- College
of Science, Minzu University of China, Beijing 100081, China
| | - Young Jun Yoon
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Xinchang Pang
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Zewei Wang
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jaehan Jung
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Yanjie He
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Yeu Wei Harn
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Ming He
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Shuguang Zhang
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Guangzhao Zhang
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Zhiqun Lin
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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31
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Hu S, Wang Y, Man X, Doi M. Deposition Patterns of Two Neighboring Droplets: Onsager Variational Principle Studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5965-5972. [PMID: 28505452 DOI: 10.1021/acs.langmuir.7b01354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
When two droplets containing nonvolatile components are sitting close to each other, asymmetrical ring-like deposition patterns are formed on the substrate. We propose a simple theory based on the Onsager variational principle to predict the deposition patterns of two neighboring droplets. The contact line motion and the interference effect of two droplets are considered simultaneously. We demonstrate that the gradients of evaporation rate along two droplets is the main reason for forming asymmetrical deposition patterns. By tracing the relative motion between the contact line and the solute particles, we found that the velocities of solute particles have no cylindrical symmetry anymore because of the asymmetrical evaporation rate, giving the underlying mechanism of forming asymmetrical patterns. Moreover, controlling the evaporation rate combined with varying the contact line friction, fan-like and eclipse-like deposition patterns are obtained. The theoretical results of pinned contact line cases are qualitatively consistent with the pervious experimental results.
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Affiliation(s)
- Shiyuan Hu
- School of Physics and Nuclear Energy Engineering and ‡Center of Soft Matter Physics and its Applications, Beihang University , Beijing 100191, China
| | - Yuhan Wang
- School of Physics and Nuclear Energy Engineering and ‡Center of Soft Matter Physics and its Applications, Beihang University , Beijing 100191, China
| | - Xingkun Man
- School of Physics and Nuclear Energy Engineering and ‡Center of Soft Matter Physics and its Applications, Beihang University , Beijing 100191, China
| | - Masao Doi
- School of Physics and Nuclear Energy Engineering and ‡Center of Soft Matter Physics and its Applications, Beihang University , Beijing 100191, China
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32
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Cho S, Kang S, Pandya A, Shanker R, Khan Z, Lee Y, Park J, Craig SL, Ko H. Large-Area Cross-Aligned Silver Nanowire Electrodes for Flexible, Transparent, and Force-Sensitive Mechanochromic Touch Screens. ACS NANO 2017; 11:4346-4357. [PMID: 28397485 DOI: 10.1021/acsnano.7b01714] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Silver nanowire (AgNW) networks are considered to be promising structures for use as flexible transparent electrodes for various optoelectronic devices. One important application of AgNW transparent electrodes is the flexible touch screens. However, the performances of flexible touch screens are still limited by the large surface roughness and low electrical to optical conductivity ratio of random network AgNW electrodes. In addition, although the perception of writing force on the touch screen enables a variety of different functions, the current technology still relies on the complicated capacitive force touch sensors. This paper demonstrates a simple and high-throughput bar-coating assembly technique for the fabrication of large-area (>20 × 20 cm2), highly cross-aligned AgNW networks for transparent electrodes with the sheet resistance of 21.0 Ω sq-1 at 95.0% of optical transmittance, which compares favorably with that of random AgNW networks (sheet resistance of 21.0 Ω sq-1 at 90.4% of optical transmittance). As a proof of concept demonstration, we fabricate flexible, transparent, and force-sensitive touch screens using cross-aligned AgNW electrodes integrated with mechanochromic spiropyran-polydimethylsiloxane composite film. Our force-sensitive touch screens enable the precise monitoring of dynamic writings, tracing and drawing of underneath pictures, and perception of handwriting patterns with locally different writing forces. The suggested technique provides a robust and powerful platform for the controllable assembly of nanowires beyond the scale of conventional fabrication techniques, which can find diverse applications in multifunctional flexible electronic and optoelectronic devices.
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Affiliation(s)
- Seungse Cho
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Saewon Kang
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Ashish Pandya
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Ravi Shanker
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Ziyauddin Khan
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Youngsu Lee
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Jonghwa Park
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
| | - Stephen L Craig
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Hyunhyub Ko
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan Metropolitan City 689-798, Republic of Korea
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33
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Lone S, Zhang JM, Vakarelski IU, Li EQ, Thoroddsen ST. Evaporative Lithography in Open Microfluidic Channel Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2861-2871. [PMID: 28233500 DOI: 10.1021/acs.langmuir.6b03304] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate a direct capillary-driven method based on wetting and evaporation of various suspensions to fabricate regular two-dimensional wires in an open microfluidic channel through continuous deposition of micro- or nanoparticles under evaporative lithography, akin to the coffee-ring effect. The suspension is gently placed in a loading reservoir connected to the main open microchannel groove on a PDMS substrate. Hydrophilic conditions ensure rapid spreading of the suspension from the loading reservoir to fill the entire channel length. Evaporation during the spreading and after the channel is full increases the particle concentration toward the end of the channel. This evaporation-induced convective transport brings particles from the loading reservoir toward the channel end where this flow deposits a continuous multilayered particle structure. The particle deposition front propagates backward over the entire channel length. The final dry deposit of the particles is thereby much thicker than the initial volume fraction of the suspension. The deposition depth is characterized using a 3D imaging profiler, whereas the deposition topography is revealed using a scanning electron microscope. The patterning technology described here is robust and passive and hence operates without an external field. This work may well become a launching pad to construct low-cost and large-scale thin optoelectronic films with variable thicknesses and interspacing distances.
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Affiliation(s)
- Saifullah Lone
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Jia Ming Zhang
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Ivan U Vakarelski
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Er Qiang Li
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Sigurdur T Thoroddsen
- Division of Physical Sciences and Engineering, King Abdullah University of Science & Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
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34
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Li B, Jiang B, Han W, He M, Li X, Wang W, Hong SW, Byun M, Lin S, Lin Z. Harnessing Colloidal Crack Formation by Flow‐Enabled Self‐Assembly. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bo Li
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Beibei Jiang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Han
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Ming He
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xiao Li
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Wei Wang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering Department of Optics and Mechatronics Engineering Pusan National University Busan 46241 Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering Keimyung University Daegu 704-701 Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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35
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Li B, Jiang B, Han W, He M, Li X, Wang W, Hong SW, Byun M, Lin S, Lin Z. Harnessing Colloidal Crack Formation by Flow-Enabled Self-Assembly. Angew Chem Int Ed Engl 2017; 56:4554-4559. [PMID: 28252248 DOI: 10.1002/anie.201700457] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Indexed: 11/09/2022]
Abstract
Self-assembly of nanomaterials to yield a wide diversity of high-order structures, materials, and devices promises new opportunities for various technological applications. Herein, we report that crack formation can be effectively harnessed by elaborately restricting the drying of colloidal suspension using a flow-enabled self-assembly (FESA) strategy to yield large-area periodic cracks (i.e., microchannels) with tunable spacing. These uniform microchannels can be utilized as a template to guide the assembly of Au nanoparticles, forming intriguing nanoparticle threads. This strategy is simple and convenient. As such, it opens the possibility for large-scale manufacturing of crack-based or crack-derived assemblies and materials for use in optics, electronics, optoelectronics, photonics, magnetic device, nanotechnology, and biotechnology.
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Affiliation(s)
- Bo Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Beibei Jiang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Wei Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ming He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Xiao Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Wei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Myunghwan Byun
- Department of Advanced Materials Engineering, Keimyung University, Daegu, 704-701, Republic of Korea
| | - Shaoliang Lin
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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36
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Park JH, Kim JS, Choi YJ, Lee WH, Lee DY, Cho JH. Gate- and Light-Tunable pn Heterojunction Microwire Arrays Fabricated via Evaporative Assembly. ACS APPLIED MATERIALS & INTERFACES 2017; 9:3857-3864. [PMID: 28032754 DOI: 10.1021/acsami.6b15301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
One-dimensional (1D) nano/microwires have attracted considerable attention as versatile building blocks for use in diverse electronic, optoelectronic, and magnetic device applications. The large-area assembly of nano/microwires at desired positions presents a significant challenge for developing high-density electronic devices. Here, we demonstrated the fabrication of cross-stacked pn heterojunction diode arrays by integrating well-aligned inorganic and organic microwires fabricated via evaporative assembly. We utilized solution-processed n-type inorganic indium-gallium-zinc-oxide (IGZO) microwires and p-type organic 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-PEN) microwires. The formation of organic TIPS-PEN semiconductor microwire and their electrical properties were optimized by controlling both the amounts of added insulating polymer and the widths of the microwires. The resulting cross-stacked IGZO/TIPS-PEN microwire pn heterojunction devices exhibited rectifying behavior with a forward-to-reverse bias current ratio exceeding 102. The ultrathin nature of the underlying n-type IGZO microwires yielded gate tunability in the charge transport behaviors, ranging from insulating to rectifying. The rectifying behaviors of the heterojunction devices could be modulated by controlling the optical power of the irradiated light. The fabrication of semiconducting microwires through evaporative assembly provides a facile and reliable approach to patterning or positioning 1D microwires for the fabrication of future flexible large-area electronics.
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Affiliation(s)
| | | | | | - Wi Hyoung Lee
- Department of Organic and Nano System Engineering, Konkuk University , Seoul 05029, Korea
| | - Dong Yun Lee
- Department of Polymer Science and Engineering, Kyungpook National University , Daegu, 41566, Korea
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37
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Wang W, Yao Y, Luo T, Chen L, Lin J, Li L, Lin S. Deterministic Reshaping of Breath Figure Arrays by Directional Photomanipulation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:4223-4230. [PMID: 28071893 DOI: 10.1021/acsami.6b14024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The fabrication of desired structures is one of the most urgent topics in current research on porous polymer films. Herein, directional photomanipulation in conjunction with breath figure processing has been demonstrated for the preparation of porous polymeric films with finely tunable pore shape and size. Because of the photoinduced directional mass migration of azobenzene units upon vertical incident linearly polarized light (LPL) irradiation, round pores on honeycomb films can be reshaped into multifarious shapes including rectangle, rhombus, dumbbell, line, and so forth. In addition, slantwise LPL irradiation produces unique asymmetrical structure inside the pores oriented along the polarized direction. On the other hand, circularly polarized light (CPL) irradiation affords manipulation of the wall thickness without changing the pore shape. This versatile directional photomanipulation method can be implemented to large-area and high-throughput reshaping processes, which paves the way to a number of promising applications such as a flexible etching mask for patterning.
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Affiliation(s)
- Wei Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Yuan Yao
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Tianchan Luo
- College of Materials, Xiamen University , Xiamen 621005, China
| | - Lingzhi Chen
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China
| | - Lei Li
- College of Materials, Xiamen University , Xiamen 621005, China
| | - Shaoliang Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China
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38
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Srikantharajah R, Schindler T, Landwehr I, Romeis S, Unruh T, Peukert W. From evaporation-induced self-assembly to shear-induced alignment. NANOSCALE 2016; 8:19882-19893. [PMID: 27878180 DOI: 10.1039/c6nr06586d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The functionality of compact nanostructured thin films depends critically on the degree of order and hence on the underlying ordering mechanisms during film formation. For dip coating of rigid nanorods the counteracting mechanisms, evaporation-induced self-assembly (EISA) and shear-induced alignment (SIA) have recently been identified as competing ordering mechanisms. Here, we show how to achieve highly ordered and homogeneous thin films by controlling EISA and SIA in dip coating. Therefore we identify the influences of the process parameters including temperature, initial volume fraction and nanorod aspect ratio on evaporation-induced convective flow and externally applied shear forces and evaluate the resulting films. The impact of evaporation and shear can be distinguished by analysing film thickness, surface order and bulk order by careful in situ SAXS, Raman and SEM-based image analysis. For the first time we derive processing guidelines for the controlled application of EISA and SIA towards highly ordered thin nematic films.
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Affiliation(s)
- R Srikantharajah
- Institute of Particle Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany.
| | - T Schindler
- Chair for Crystallography and Structural Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 3, 91058 Erlangen, Germany
| | - I Landwehr
- Fraunhofer Institute for Manufacturing Engineering and Automation IPA, Nobelstraße 12, 70569 Stuttgart, Germany
| | - S Romeis
- Institute of Particle Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany.
| | - T Unruh
- Chair for Crystallography and Structural Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 3, 91058 Erlangen, Germany
| | - W Peukert
- Institute of Particle Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany.
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39
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Zhao Q, Lian Z, Gao X, Yan Y, Huang J. General Approach To Construct Photoresponsive Self-Assembly in a Light-Inert Amphiphilic System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11973-11979. [PMID: 27762561 DOI: 10.1021/acs.langmuir.6b02836] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ability to modulate amphiphilic aggregation reversibly with external stimuli, especially using light as a trigger, is of great importance. This has greatly contributed to the development of applications using self-assembly. However, most previously described systems are based on a specific molecular design and have shown difficultly in their application to light-inert aggregation. Here, we developed a general and effective approach to control the morphology of amphiphilic aggregates by light, which is suitable for different assemblies such as micelles, vesicles, and helixes. Our strategy is to construct a photoresponsive factor into light-inert self-assemblies. On the basis of the different capabilities to form host-guest inclusions between photoresponsive azobenzene sodium and light-inert molecules with cyclodextrin, the transformation of the corresponding amphiphilic aggregation can be controlled easily and reversibly by light stimuli. Not only the nanostructure of the aggregates but also the phase behavior, such as gel formation, can be modulated upon light irradiation using this method.
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Affiliation(s)
- Qiang Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Zhen Lian
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Xuedong Gao
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Yun Yan
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Jianbin Huang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
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40
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Bao Y, Witten TA, Scherer NF. Self-Organizing Arrays of Size Scalable Nanoparticle Rings. ACS NANO 2016; 10:8947-8955. [PMID: 27575751 DOI: 10.1021/acsnano.6b04965] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A central challenge in nano- and mesoscale materials research is facile formation of specific structures for catalysis, sensing, and photonics. Self-assembled equilibrium structures, such as three-dimensional crystals or ordered monolayers, form as a result of the interactions of the constituents. Other structures can be achieved by imposing forces (fields) and/or boundary conditions, which Whitesides termed "self-organization". Here, we demonstrate contact line pinning on locally curved surfaces (i.e., a self-assembled monolayer of SiO2 colloidal particles) as a boundary condition to create extended arrays of uniform rings of Au nanoparticles (NPs) on the SiO2 colloids. The mechanism differs from the well-known "coffee-ring" effect; here the functionalized NPs deposit at the contact line and are not driven by evaporative transport. Thus, NP ring formation depends on the hydrophobicity and wetting of the SiO2 colloids by the chloroform solution, ligands on the NPs, and temperature. The NP rings exhibit size scaling behavior, maintaining a constant ratio of NP ring-to-colloid diameter (from 300 nm to 2 μm). The resultant high-quality NP ring structures are expected to have interesting photonic properties.
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Affiliation(s)
- Ying Bao
- Department of Chemistry, ‡The James Franck Institute, §Department of Physics, The University of Chicago , 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Thomas A Witten
- Department of Chemistry, ‡The James Franck Institute, §Department of Physics, The University of Chicago , 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Norbert F Scherer
- Department of Chemistry, ‡The James Franck Institute, §Department of Physics, The University of Chicago , 929 East 57th Street, Chicago, Illinois 60637, United States
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41
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Chang T, Du B, Huang H, He T. Highly Tunable Complementary Micro/Submicro-Nanopatterned Surfaces Combining Block Copolymer Self-Assembly and Colloidal Lithography. ACS APPLIED MATERIALS & INTERFACES 2016; 8:22705-22713. [PMID: 27509255 DOI: 10.1021/acsami.6b07730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Two kinds of large-area ordered and highly tunable micro/submicro-nanopatterned surfaces in a complementary manner were successfully fabricated by elaborately combining block copolymer self-assembly and colloidal lithography. Employing a monolayer of polystyrene (PS) colloidal spheres assembled on top as etching mask, polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) or polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) micelle films were patterned into micro/submicro patches by plasma etching, which could be further transferred into micropatterned metal nanoarrays by subsequent metal precursor loading and a second plasma etching. On the other hand, micro/submicro-nanopatterns in a complementary manner were generated via preloading a metal precursor in initial micelle films before the assembly of PS colloidal spheres on top. Both kinds of micro/submicro-nanopatterns showed good fidelity at the micro/submicroscale and nanoscale; meanwhile, they could be flexibly tuned by the sample and processing parameters. Significantly, when the PS colloidal sphere size was reduced to 250 nm, a high-resolution submicro-nanostructured surface with 3-5 metal nanoparticles in each patch or a single-nanoparticle interconnected honeycomb network was achieved. Moreover, by applying gold (Au) nanoparticles as anchoring points, micronanopatterned Au arrays can serve as a flexible template to pattern bovine serum albumin (BSA) molecules. This facile and cost-effective approach may provide a novel platform for fabrication of micropatterned nanoarrays with high tunability and controllability, which are promising in the applications of biological and microelectronic fields.
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Affiliation(s)
- Tongxin Chang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P. R. China
- University of Chinese Academy of Sciences , Beijing 100039, P. R. China
| | - Binyang Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, and Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Haiying Huang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P. R. China
- University of Chinese Academy of Sciences , Beijing 100039, P. R. China
| | - Tianbai He
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P. R. China
- University of Chinese Academy of Sciences , Beijing 100039, P. R. China
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42
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Park JH, Sun Q, Choi Y, Lee S, Lee DY, Kim YH, Cho JH. Wafer-Scale Microwire Transistor Array Fabricated via Evaporative Assembly. ACS APPLIED MATERIALS & INTERFACES 2016; 8:15543-50. [PMID: 27228025 DOI: 10.1021/acsami.6b04340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
One-dimensional (1D) nano/microwires have attracted significant attention as promising building blocks for various electronic and optical device applications. The integration of these elements into functional device networks with controlled alignment and density presents a significant challenge for practical device applications. Here, we demonstrated the fabrication of wafer-scale microwire field-effect transistor (FET) arrays based on well-aligned inorganic semiconductor microwires (indium-gallium-zinc-oxide (IGZO)) and organic polymeric insulator microwires fabricated via a simple and large-area evaporative assembly technique. This microwire fabrication method offers a facile approach to precisely manipulating the channel dimensions of the FETs. The resulting solution-processed monolithic IGZO microwire FETs exhibited a maximum electron mobility of 1.02 cm(2) V(-1) s(-1) and an on/off current ratio of 1 × 10(6). The appropriate choice of the polymeric microwires used to define the channel lengths enabled fine control over the threshold voltages of the devices, which were employed to fabricate high-performance depletion-load inverters. Low-voltage-operated microwire FETs were successfully fabricated on a plastic substrate using a high-capacitance ion gel gate dielectric. The microwire fabrication technique involving evaporative assembly provided a facile, effective, and reliable method for preparing flexible large-area electronics.
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Affiliation(s)
| | - Qijun Sun
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Nanotechnology (NCNST) , Beijing 100083, P. R. China
| | | | | | - Dong Yun Lee
- Department of Polymer Science and Engineering, Kyungpook National University , Daegu 41566, Korea
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43
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Basu S, Bansal L, Miglani A. Towards universal buckling dynamics in nanocolloidal sessile droplets: the effect of hydrophilic to superhydrophobic substrates and evaporation modes. SOFT MATTER 2016; 12:4896-4902. [PMID: 27125247 DOI: 10.1039/c6sm00837b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The evaporation of a nanocolloidal sessile droplet exhibits preferential particle assembly, nanoporous shell formation and buckling to form cavities with unique morphological features. Here, we have established many universal trends that explain the buckling dynamics under one umbrella irrespective of hydrophobicity, evaporation mode and particle loading. We provide a regime map explaining the droplet morphology and buckling characteristics for droplet evaporation on various substrates. Specifically, we find that the final droplet volume and the radius of curvature at the buckling onset are universal functions of particle concentration. Furthermore, we establish that post-buckling cavity growth is evaporation driven regardless of the substrate.
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Affiliation(s)
- Saptarshi Basu
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560012, India.
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Cox LM, Killgore JP, Li Z, Long R, Sanders AW, Xiao J, Ding Y. Influences of Substrate Adhesion and Particle Size on the Shape Memory Effect of Polystyrene Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3691-3698. [PMID: 27023181 DOI: 10.1021/acs.langmuir.6b00588] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Formulations and applications of micro- and nanoscale polymer particles have proliferated rapidly in recent years, yet knowledge of their mechanical behavior has not grown accordingly. In this study, we examine the ways that compressive strain, substrate surface energy, and particle size influence the shape memory cycle of polystyrene particles. Using nanoimprint lithography, differently sized particles are programmed into highly deformed, temporary shapes in contact with substrates of differing surface energies. Atomic force microscopy is used to obtain in situ measurements of particle shape recovery kinetics, and scanning electron microscopy is employed to assess differences in the profiles of particles at the conclusion of the shape memory cycle. Finally, finite element models are used to investigate the growing impact of surface energies at smaller length scales. Results reveal that the influence of substrate adhesion on particle recovery is size-dependent and can become dominating at submicron length scales.
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Affiliation(s)
- Lewis M Cox
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Jason P Killgore
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Zhengwei Li
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Rong Long
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Aric W Sanders
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Jianliang Xiao
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
| | - Yifu Ding
- Department of Mechanical Engineering and ‡Material Science and Engineering Program, University of Colorado at Boulder , Boulder, Colorado 80309-0427, United States
- Applied Chemicals and Materials Division and §Radio Frequency Technology Division, National Institute of Standards and Technology , Boulder, Colorado 80305, United States
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45
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Wang D, Cao Y, Cao M, Sun Y, Wang J, Hao J. Dual-Responsive Viscoelastic Lyotropic Liquid Crystal Fluids to Control the Diffusion of Hydrophilic and Hydrophobic Molecules. Chemphyschem 2016; 17:2079-87. [DOI: 10.1002/cphc.201600066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Wang
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology; China University of Petroleum (East China); Qingdao 266580 China
| | - Yueying Cao
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology; China University of Petroleum (East China); Qingdao 266580 China
| | - Meiwen Cao
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology; China University of Petroleum (East China); Qingdao 266580 China
| | - Yawei Sun
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology; China University of Petroleum (East China); Qingdao 266580 China
| | - Jiqian Wang
- State Key Laboratory of Heavy Oil Processing & Centre for Bioengineering and Biotechnology; China University of Petroleum (East China); Qingdao 266580 China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry; Shandong University), Ministry of Education; Jinan 250100 China
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46
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Jung J, Lin CH, Yoon YJ, Malak ST, Zhai Y, Thomas EL, Vardeny V, Tsukruk VV, Lin Z. Crafting Core/Graded Shell-Shell Quantum Dots with Suppressed Re-absorption and Tunable Stokes Shift as High Optical Gain Materials. Angew Chem Int Ed Engl 2016; 55:5071-5. [DOI: 10.1002/anie.201601198] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Jaehan Jung
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Chun Hao Lin
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Young Jun Yoon
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Sidney T. Malak
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Yaxin Zhai
- Department of Physics and Astronomy; University of Utah; Salt Lake City UT 84112 USA
| | - Edwin L. Thomas
- Department of Materials Science and Nanoengineering; Rice University; Houston TX 77251 USA
| | - Valy Vardeny
- Department of Physics and Astronomy; University of Utah; Salt Lake City UT 84112 USA
| | - Vladimir V. Tsukruk
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Zhiqun Lin
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
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47
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Jung J, Lin CH, Yoon YJ, Malak ST, Zhai Y, Thomas EL, Vardeny V, Tsukruk VV, Lin Z. Crafting Core/Graded Shell-Shell Quantum Dots with Suppressed Re-absorption and Tunable Stokes Shift as High Optical Gain Materials. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601198] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jaehan Jung
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Chun Hao Lin
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Young Jun Yoon
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Sidney T. Malak
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Yaxin Zhai
- Department of Physics and Astronomy; University of Utah; Salt Lake City UT 84112 USA
| | - Edwin L. Thomas
- Department of Materials Science and Nanoengineering; Rice University; Houston TX 77251 USA
| | - Valy Vardeny
- Department of Physics and Astronomy; University of Utah; Salt Lake City UT 84112 USA
| | - Vladimir V. Tsukruk
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Zhiqun Lin
- School of Materials Science and Engineering; Georgia Institute of Technology; Atlanta GA 30332 USA
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48
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Baro M, Jaidev J, Ramaprabhu S. Electrochemical catalytic activity study of nitrogen-containing hierarchically porous carbon and its application in dye-sensitized solar cells. RSC Adv 2016. [DOI: 10.1039/c6ra18121j] [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] Open
Abstract
Nitrogen-containing hierarchically porous carbon is derived by carbonizing and activating polypyrrole nanostructure (APNP) using a template-free synthesis method and is demonstrated to be an efficient counter electrode (CE) in dye-sensitized solar cells (DSSCs).
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Affiliation(s)
- Mridula Baro
- Alternative Energy and Nanotechnology Laboratory (AENL)
- Nano Functional Materials Technology Centre (NFMTC)
- Department of Physics
- Indian Institute of Technology Madras
- Chennai 600036
| | - Jaidev Jaidev
- Alternative Energy and Nanotechnology Laboratory (AENL)
- Nano Functional Materials Technology Centre (NFMTC)
- Department of Physics
- Indian Institute of Technology Madras
- Chennai 600036
| | - Sundara Ramaprabhu
- Alternative Energy and Nanotechnology Laboratory (AENL)
- Nano Functional Materials Technology Centre (NFMTC)
- Department of Physics
- Indian Institute of Technology Madras
- Chennai 600036
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Tan S, Lu Z, Zhao J, Zhang J, Wu M, Wu Q, Yang J. Synthesis and multi-responsiveness of poly(N-vinylcaprolactam-co-acrylic acid) core–shell microgels via miniemulsion polymerization. Polym Chem 2016. [DOI: 10.1039/c6py00544f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein a facile and large fabrication of multi-responsive poly(N-vinylcaprolactam-co-acrylic acid) microgels with a core–shell structure via seed miniemulsion polymerization. The multi-responsive microgels can reversibly swell and shrink in response to pH and temperature variation.
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Affiliation(s)
- Shen Tan
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Zhengquan Lu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jing Zhao
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jianan Zhang
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Mingyuan Wu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Qingyun Wu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jianjun Yang
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
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50
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Sun Y, Li H, Lin Y, Niu L, Wang Q. Integration of poly(3-hexylthiophene) conductive stripe patterns with 3D tubular structures for tissue engineering applications. RSC Adv 2016. [DOI: 10.1039/c6ra14109a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
P3HT was self-assembled into large-scale conductive stripe patterns based on confined evaporative self-assembly. These conductive stripe patterns could induce cell alignment and provide spatial electric signals to modulate cellular behaviors.
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Affiliation(s)
- Yingjuan Sun
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Changchun
- P. R. China
- University of Chinese Academy of Sciences
| | - Hongyan Li
- State Key Laboratory of Electroanalytical Chemistry
- c/o Engineering Laboratory of Modern Analytical Techniques
- Changchun Institute of Applied Chemistry
- Changchun
- P. R. China
| | - Yuan Lin
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Changchun
- P. R. China
| | - Li Niu
- State Key Laboratory of Electroanalytical Chemistry
- c/o Engineering Laboratory of Modern Analytical Techniques
- Changchun Institute of Applied Chemistry
- Changchun
- P. R. China
| | - Qian Wang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Changchun
- P. R. China
- Department of Chemistry and Biochemistry
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