The Experts below are selected from a list of 72867 Experts worldwide ranked by ideXlab platform
Krishnacharya Khare - One of the best experts on this subject based on the ideXlab platform.
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Mechanically Tunable Slippery Behavior on Soft Poly(dimethylsiloxane) (PDMS) Based Anisotropic Wrinkles Infused with Lubricating Fluid
arXiv: Soft Condensed Matter, 2016Co-Authors: Reeta Pant, Arun Kumar Nagarajan, Krishnacharya KhareAbstract:We demonstrate a novel technique to fabricate mechanically tunable slippery surfaces using one dimensional (anisotropic) elastic Wrinkles. Such Wrinkles show tunable topography (amplitude) on the application of mechanical strain. Following Nepenthes pitcher plants, lubricating fluid infused solid surfaces show excellent slippery behavior for test liquid drops. Therefore combining the above two i.e. infusing suitable lubricating fluid on elastic Wrinkles would enable us to fabricate mechanically tunable slippery surfaces. Completely stretched (flat) Wrinkles have uniform coating of lubricating fluid whereas completely relaxed (full amplitude) Wrinkles have most of the lubricating oil in the Wrinkle grooves. Therefore water drops on completely stretched surface show excellent slippery behavior whereas on completely relaxed surface they show very poor slippery behavior. Therefore continuous variation of Wrinkle stretching provide reversibly tunable slippery behavior on such system. Since the winkles are one dimensional, they show anisotropic tunability of slippery behavior depending upon whether test liquid drops slip parallel or perpendicular to the Wrinkles.
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Mechanically Tunable Slippery Behavior on Soft Poly(dimethylsiloxane)-Based Anisotropic Wrinkles Infused with Lubricating Fluid
Langmuir, 2016Co-Authors: Pritam Kumar Roy, Rohan Pant, Arun Kumar Nagarajan, Krishnacharya KhareAbstract:We demonstrate a novel technique to fabricate mechanically tunable slippery surfaces using one-dimensional (anisotropic) elastic Wrinkles. Such Wrinkles show tunable topography (amplitude) on the application of mechanical strain. Following Nepenthes pitcher plants, lubricating fluid infused solid surfaces show excellent slippery behavior for test liquid drops. Therefore, combining the above two, that is, infusing suitable lubricating fluid on elastic Wrinkles, would enable us to fabricate mechanically tunable slippery surfaces. Completely stretched (flat) Wrinkles have uniform coating of lubricating fluid, whereas completely relaxed (full amplitude) Wrinkles have most of the lubricating oil in the Wrinkle grooves. Therefore, water drops on completely stretched surface show excellent slippery behavior, whereas on completely relaxed surface they show reduced slippery behavior. Therefore, continuous variation of Wrinkle stretching provides reversibly tunable slippery behavior on such a system. Because the wr...
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harnessing surface Wrinkle patterns in soft matter
Advanced Functional Materials, 2010Co-Authors: Shu Yang, Krishnacharya KhareAbstract:Mechanical instabilities in soft materials, specifically wrinkling, have led to the formation of unique surface patterns for a wide range of applications that are related to surface topography and its dynamic tuning. In this progress report, two distinct approaches for Wrinkle formation, including mechanical stretching/releasing of oxide/PDMS bilayers and swelling of hydrogel films confined on a rigid substrate with a depth-wise modulus gradient, are discussed. The wrinkling mechanisms and transitions between different Wrinkle patterns are studied. Strategies to control the Wrinkle pattern order and characteristic wavelength are suggested, and some efforts in harnessing topographic tunability in elastomeric PDMS bilayer Wrinkled films for various applications, including tunable adhesion, wetting, microfluidics, and microlens arrays, are highlighted. The report concludes with perspectives on the future directions in manipulation of pattern formation for complex structures, and potential new technological applications.
Tao Xie - One of the best experts on this subject based on the ideXlab platform.
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Unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials and Interfaces, 2012Co-Authors: Jie Li, Junjun Li, Yonghao An, Hanqing Jiang, Rui Huang, Tao XieAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique thermomechanical properties of the shape memory substrate and possible plastic deformation of the thin film.
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Encoding localized strain history through Wrinkle based structural colors
Advanced Materials, 2010Co-Authors: Tao Xie, Xingcheng Xiao, Junjun Li, Jie Li, Ruomiao WangAbstract:Surface Wrinkles are created on a metallic film supported on a shape memory polymer substrate. The Wrinkle wavelength approaches that of visible lights, resulting in diffraction colors. The spatial and geometric distribution of the surface Wrinkles can be controlled in an arbitrary fashion, allowing the capture of a three dimensional arbitrary image on a macroscopically flat surface.
Junjun Li - One of the best experts on this subject based on the ideXlab platform.
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unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials & Interfaces, 2012Co-Authors: Junjun Li, Yonghao An, Rui Huang, Hanqing JiangAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique th...
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Unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials and Interfaces, 2012Co-Authors: Jie Li, Junjun Li, Yonghao An, Hanqing Jiang, Rui Huang, Tao XieAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique thermomechanical properties of the shape memory substrate and possible plastic deformation of the thin film.
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Encoding localized strain history through Wrinkle based structural colors
Advanced Materials, 2010Co-Authors: Tao Xie, Xingcheng Xiao, Junjun Li, Jie Li, Ruomiao WangAbstract:Surface Wrinkles are created on a metallic film supported on a shape memory polymer substrate. The Wrinkle wavelength approaches that of visible lights, resulting in diffraction colors. The spatial and geometric distribution of the surface Wrinkles can be controlled in an arbitrary fashion, allowing the capture of a three dimensional arbitrary image on a macroscopically flat surface.
Hanqing Jiang - One of the best experts on this subject based on the ideXlab platform.
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unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials & Interfaces, 2012Co-Authors: Junjun Li, Yonghao An, Rui Huang, Hanqing JiangAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique th...
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Unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials and Interfaces, 2012Co-Authors: Jie Li, Junjun Li, Yonghao An, Hanqing Jiang, Rui Huang, Tao XieAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique thermomechanical properties of the shape memory substrate and possible plastic deformation of the thin film.
Jie Li - One of the best experts on this subject based on the ideXlab platform.
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Unique aspects of a shape memory polymer as the substrate for surface wrinkling
ACS Applied Materials and Interfaces, 2012Co-Authors: Jie Li, Junjun Li, Yonghao An, Hanqing Jiang, Rui Huang, Tao XieAbstract:Typical bilayer Wrinkle systems employ soft elastomers as the substrates. In contrast, shape memory polymers have recently emerged as attractive alternatives. Besides the shape fixing capability, shape memory polymers distinguish from elastomers in that they are rigid at room temperature, but experience significant modulus drop upon heating. We hereby report unique aspects of shape memory polymers as the Wrinkle substrate utilizing a metallic thin film as the top layer. The feasibility to create both reversible and irreversible Wrinkles (and diffraction colors) on a single substrate is demonstrated. Experimental conditions are identified to create crack free Wrinkles and the impact of various experimental parameters on the Wrinkle wavelength and amplitude is investigated. The results suggest that the Wrinkle mechanics deviate notably from the existing theories established with elastomers as the Wrinkle substrates. Thus, a new theory will need to be developed in the future, taking into account of unique thermomechanical properties of the shape memory substrate and possible plastic deformation of the thin film.
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Encoding localized strain history through Wrinkle based structural colors
Advanced Materials, 2010Co-Authors: Tao Xie, Xingcheng Xiao, Junjun Li, Jie Li, Ruomiao WangAbstract:Surface Wrinkles are created on a metallic film supported on a shape memory polymer substrate. The Wrinkle wavelength approaches that of visible lights, resulting in diffraction colors. The spatial and geometric distribution of the surface Wrinkles can be controlled in an arbitrary fashion, allowing the capture of a three dimensional arbitrary image on a macroscopically flat surface.
