Reversible Switching between Superhydrophilicity and Superhydrophobicity

Sun, Taolei; Wang, Guojie; Feng, Lin; Liu, Biqian; Ma, Yue; Jiang, Lei; Zhu, Daoben

doi:10.1002/anie.200352565

Cited by 1,077 publications

(895 citation statements)

References 38 publications

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“…Poly(N-substituted acrylamide) (PNIPAAm) is the most popular temperature-responsive polymer because of its sharp phase transition in water at around 32 8C. [109] The NIPAAm segment can been designed to control the lower critical solution temperature (LCST) as well as the response kinetics at the molecular level. Thus, NIPAAm is a suitable target molecule for responsive films.…”

Section: Single-responsive Interfacesmentioning

confidence: 99%

Bio‐Inspired, Smart, Multiscale Interfacial Materials

2008

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In this review a strategy for the design of bioinspired, smart, multiscale interfacial (BSMI) materials is presented and put into context with recent progress in the field of BSMI materials spanning natural to artificial to reversibly stimuli‐sensitive interfaces. BSMI materials that respond to single/dual/multiple external stimuli, e.g., light, pH, electrical fields, and so on, can switch reversibly between two entirely opposite properties. This article utilizes hydrophobicity and hydrophilicity as an example to demonstrate the feasibility of the design strategy, which may also be extended to other properties, for example, conductor/insulator, p‐type/n‐type semiconductor, or ferromagnetism/anti‐ferromagnetism, for the design of other BSMI materials in the future.

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Section: Single-responsive Interfacesmentioning

confidence: 99%

Bio‐Inspired, Smart, Multiscale Interfacial Materials

2008

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“…[66] Besides, because the liquid-transport ability can be controlled by manipulating the surface wettability, smart peristome-inspired surfaces can be prepared by constructing stimulus-responsive materials on the surfaces. [60,67,68] This will result in a controllable liquid flow on the surface, showing wide applications in mechanical engineering, including in controllable self-lubrication (Figure 4c), and heat or mass transfer. [69] In addition, one of the important applications of peristome-mimetic structures could be in microfluidics, [70] and the unidirectional liquid transport on the biomimetic structure in channels could be used for smart and controllable microfluidic devices (Figure 4d), for example, the lab-on-a-chip.…”

Section: Applications Of Peristome-inspired Surfacesmentioning

confidence: 99%

Surfaces Inspired by the Nepenthes Peristome for Unidirectional Liquid Transport

et al. 2017

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The slippery peristome of the pitcher plant Nepenthes has attracted much attention due to its unique function for preying on insects. Recent findings on the peristome surface of Nepenthes alata demonstrate a fast and continuous unidirectional liquid transport, which is enabled by the combination of a pinning effect at the sharp edges and a capillary rise in the wedge, deriving from the multiscale structure, which provides inspiration for designing and fabricating functional surfaces for unidirectional liquid transport. Developments in the fabrication methods of peristome‐inspired surfaces and control methods for liquid transport are summarized. Both potential applications in the fields of microfluidic devices, biomedicine, and mechanical engineering and directions for further research in the future are discussed.

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“…Electrochemical switching in polymers is expected to affect the strength and the density of dipoles and the binding characteristics of doping ions. Thus, by modifying the electrochemical switch, it is possible to achieve electronic control over the surface tension (Isaksson et al 2004;Sun et al 2004;Causley et al 2005;Robinson et al 2006). It has also been reported that the wetting and adhesive properties of an electroactive polymer can be varied by changing its oxidation state.…”

Section: Physical -Chemical Modificationsmentioning

confidence: 99%

Applications of conducting polymers and their issues in biomedical engineering

Ravichandran

Sundarrajan

Venugopal

et al. 2010

J. R. Soc. Interface.

388

253

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Conducting polymers (CPs) have attracted much interest as suitable matrices of biomolecules and have been used to enhance the stability, speed and sensitivity of various biomedical devices. Moreover, CPs are inexpensive, easy to synthesize and versatile because their properties can be readily modulated by (i) surface functionalization techniques and (ii) the use of a wide range of molecules that can be entrapped or used as dopants. This paper discusses the various surface modifications of the CP that can be employed in order to impart physico-chemical and biological guidance cues that promote cell adhesion/proliferation at the polymer-tissue interface. This ability of the CP to induce various cellular mechanisms widens its applications in medical fields and bioengineering.

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Reversible Switching between Superhydrophilicity and Superhydrophobicity

Abstract: From soaking wet to bone dry: The concept of reversible switching between superhydrophilicity and superhydrophobicity of a surface (see picture) exploits the thermally responsive wettability of poly(N‐isopropylacrylamide), and this property is enhanced by surface roughness.

Cited by 1,077 publications

References 38 publications

Bio‐Inspired, Smart, Multiscale Interfacial Materials

Bio‐Inspired, Smart, Multiscale Interfacial Materials

Surfaces Inspired by the Nepenthes Peristome for Unidirectional Liquid Transport

Applications of conducting polymers and their issues in biomedical engineering

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