Publications
1.
Wong, Tak-Sing; Kang, Sung Hoon; Tang, Sindy. K. Y.; Smythe, Elizabeth J.; Hatton, Benjamin D.; Grinthal, Alison; Aizenberg, Joanna
Bioinspired Self-Repairing Slippery Surfaces with Pressure-Stable Omniphobicity Journal Article
In: Nature, vol. 477, pp. 443–447, 2011, (Image Credits: James C. Weaver and Peter Allen. Selected for 2012 R&D 100 Award. Featured on News & Views, highlighted in the issue of Nature and various media worldwide including BBC, the Times, Daily Mail, ABC (Australia & Spain), Discovery, Financial Times, Yahoo News (UK), Agence France-Presse, Sina (China), the Statesman (India), Nature Chemistry, Hot Topic Article in Nature Asia-Pacific, C&EN, AAAS EurekAlert, Chemistry World, Physics World, Spektrum Der Wissenschaft, New Scientist, and the Engineer).
@article{Wong2011,
title = {Bioinspired Self-Repairing Slippery Surfaces with Pressure-Stable Omniphobicity},
author = {Tak-Sing Wong and Sung Hoon Kang and Sindy. K. Y. Tang and Elizabeth J. Smythe and Benjamin D. Hatton and Alison Grinthal and Joanna Aizenberg},
url = {http://www.nature.com/nature/journal/v477/n7365/full/nature10447.html},
year = {2011},
date = {2011-09-22},
journal = {Nature},
volume = {477},
pages = {443–447},
abstract = {Creating a robust synthetic surface that repels various liquids would have broad technological implications for areas ranging from biomedical devices and fuel transport to architecture but has proved extremely challenging1. Inspirations from natural nonwetting structures2, 3, 4, 5, 6, particularly the leaves of the lotus, have led to the development of liquid-repellent microtextured surfaces that rely on the formation of a stable air–liquid interface7, 8, 9. Despite over a decade of intense research, these surfaces are, however, still plagued with problems that restrict their practical applications: limited oleophobicity with high contact angle hysteresis9, failure under pressure10, 11, 12 and upon physical damage1, 7, 11, inability to self-heal and high production cost1, 11. To address these challenges, here we report a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface. This surface outperforms its natural counterparts2, 3, 4, 5, 6 and state-of-the-art synthetic liquid-repellent surfaces8, 9, 14, 15, 16 in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low contact angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1–1 s), resist ice adhesion, and function at high pressures (up to about 680 atm). We show that these properties are insensitive to the precise geometry of the underlying substrate, making our approach applicable to various inexpensive, low-surface-energy structured materials (such as porous Teflon membrane). We envision that these slippery surfaces will be useful in fluid handling and transportation, optical sensing, medicine, and as self-cleaning and anti-fouling materials operating in extreme environments.},
note = {Image Credits: James C. Weaver and Peter Allen.
Selected for 2012 R&D 100 Award.
Featured on News & Views, highlighted in the issue of Nature and various media worldwide including BBC, the Times, Daily Mail, ABC (Australia & Spain), Discovery, Financial Times, Yahoo News (UK), Agence France-Presse, Sina (China), the Statesman (India), Nature Chemistry, Hot Topic Article in Nature Asia-Pacific, C&EN, AAAS EurekAlert, Chemistry World, Physics World, Spektrum Der Wissenschaft, New Scientist, and the Engineer},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Creating a robust synthetic surface that repels various liquids would have broad technological implications for areas ranging from biomedical devices and fuel transport to architecture but has proved extremely challenging1. Inspirations from natural nonwetting structures2, 3, 4, 5, 6, particularly the leaves of the lotus, have led to the development of liquid-repellent microtextured surfaces that rely on the formation of a stable air–liquid interface7, 8, 9. Despite over a decade of intense research, these surfaces are, however, still plagued with problems that restrict their practical applications: limited oleophobicity with high contact angle hysteresis9, failure under pressure10, 11, 12 and upon physical damage1, 7, 11, inability to self-heal and high production cost1, 11. To address these challenges, here we report a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface. This surface outperforms its natural counterparts2, 3, 4, 5, 6 and state-of-the-art synthetic liquid-repellent surfaces8, 9, 14, 15, 16 in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low contact angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1–1 s), resist ice adhesion, and function at high pressures (up to about 680 atm). We show that these properties are insensitive to the precise geometry of the underlying substrate, making our approach applicable to various inexpensive, low-surface-energy structured materials (such as porous Teflon membrane). We envision that these slippery surfaces will be useful in fluid handling and transportation, optical sensing, medicine, and as self-cleaning and anti-fouling materials operating in extreme environments.
Note: Send e-mail to Prof. Kang at [email protected] if you need a pdf file of the papers below.
2011
Wong, Tak-Sing; Kang, Sung Hoon; Tang, Sindy. K. Y.; Smythe, Elizabeth J.; Hatton, Benjamin D.; Grinthal, Alison; Aizenberg, Joanna
Bioinspired Self-Repairing Slippery Surfaces with Pressure-Stable Omniphobicity Journal Article
In: Nature, vol. 477, pp. 443–447, 2011, (Image Credits: James C. Weaver and Peter Allen. Selected for 2012 R&D 100 Award. Featured on News & Views, highlighted in the issue of Nature and various media worldwide including BBC, the Times, Daily Mail, ABC (Australia & Spain), Discovery, Financial Times, Yahoo News (UK), Agence France-Presse, Sina (China), the Statesman (India), Nature Chemistry, Hot Topic Article in Nature Asia-Pacific, C&EN, AAAS EurekAlert, Chemistry World, Physics World, Spektrum Der Wissenschaft, New Scientist, and the Engineer).
Abstract | Links | BibTeX | Tags: Bio-Inspired, Omniphobic, Pressure-Stable, Self-Repair, Slippery, Surface
@article{Wong2011,
title = {Bioinspired Self-Repairing Slippery Surfaces with Pressure-Stable Omniphobicity},
author = {Tak-Sing Wong and Sung Hoon Kang and Sindy. K. Y. Tang and Elizabeth J. Smythe and Benjamin D. Hatton and Alison Grinthal and Joanna Aizenberg},
url = {http://www.nature.com/nature/journal/v477/n7365/full/nature10447.html},
year = {2011},
date = {2011-09-22},
journal = {Nature},
volume = {477},
pages = {443–447},
abstract = {Creating a robust synthetic surface that repels various liquids would have broad technological implications for areas ranging from biomedical devices and fuel transport to architecture but has proved extremely challenging1. Inspirations from natural nonwetting structures2, 3, 4, 5, 6, particularly the leaves of the lotus, have led to the development of liquid-repellent microtextured surfaces that rely on the formation of a stable air–liquid interface7, 8, 9. Despite over a decade of intense research, these surfaces are, however, still plagued with problems that restrict their practical applications: limited oleophobicity with high contact angle hysteresis9, failure under pressure10, 11, 12 and upon physical damage1, 7, 11, inability to self-heal and high production cost1, 11. To address these challenges, here we report a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface. This surface outperforms its natural counterparts2, 3, 4, 5, 6 and state-of-the-art synthetic liquid-repellent surfaces8, 9, 14, 15, 16 in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low contact angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1–1 s), resist ice adhesion, and function at high pressures (up to about 680 atm). We show that these properties are insensitive to the precise geometry of the underlying substrate, making our approach applicable to various inexpensive, low-surface-energy structured materials (such as porous Teflon membrane). We envision that these slippery surfaces will be useful in fluid handling and transportation, optical sensing, medicine, and as self-cleaning and anti-fouling materials operating in extreme environments.},
note = {Image Credits: James C. Weaver and Peter Allen.
Selected for 2012 R&D 100 Award.
Featured on News & Views, highlighted in the issue of Nature and various media worldwide including BBC, the Times, Daily Mail, ABC (Australia & Spain), Discovery, Financial Times, Yahoo News (UK), Agence France-Presse, Sina (China), the Statesman (India), Nature Chemistry, Hot Topic Article in Nature Asia-Pacific, C&EN, AAAS EurekAlert, Chemistry World, Physics World, Spektrum Der Wissenschaft, New Scientist, and the Engineer},
keywords = {Bio-Inspired, Omniphobic, Pressure-Stable, Self-Repair, Slippery, Surface},
pubstate = {published},
tppubtype = {article}
}
Creating a robust synthetic surface that repels various liquids would have broad technological implications for areas ranging from biomedical devices and fuel transport to architecture but has proved extremely challenging1. Inspirations from natural nonwetting structures2, 3, 4, 5, 6, particularly the leaves of the lotus, have led to the development of liquid-repellent microtextured surfaces that rely on the formation of a stable air–liquid interface7, 8, 9. Despite over a decade of intense research, these surfaces are, however, still plagued with problems that restrict their practical applications: limited oleophobicity with high contact angle hysteresis9, failure under pressure10, 11, 12 and upon physical damage1, 7, 11, inability to self-heal and high production cost1, 11. To address these challenges, here we report a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface. This surface outperforms its natural counterparts2, 3, 4, 5, 6 and state-of-the-art synthetic liquid-repellent surfaces8, 9, 14, 15, 16 in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low contact angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1–1 s), resist ice adhesion, and function at high pressures (up to about 680 atm). We show that these properties are insensitive to the precise geometry of the underlying substrate, making our approach applicable to various inexpensive, low-surface-energy structured materials (such as porous Teflon membrane). We envision that these slippery surfaces will be useful in fluid handling and transportation, optical sensing, medicine, and as self-cleaning and anti-fouling materials operating in extreme environments.