TITLE

High contact angle hysteresis of superhydrophobic surfaces: Hydrophobic defects

AUTHOR(S)
Feng-Ming Chang; Siang-Jie Hong; Yu-Jane Sheng; Heng-Kwong Tsao
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/10/2009, Vol. 95 Issue 6, p064102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A typical superhydrophobic surface is essentially nonadhesive and exhibits very low water contact angle (CA) hysteresis, so-called Lotus effect. However, leaves of some plants such as scallion and garlic with an advancing angle exceeding 150° show very serious CA hysteresis. Although surface roughness and epicuticular wax can explain the very high advancing CA, our analysis indicates that the unusual hydrophobic defect, diallyl disulfide, is the key element responsible for contact line pinning on allium leaves. After smearing diallyl disulfide on an extended polytetrafluoroethylene (PTFE) film, which is originally absent of CA hysteresis, the surface remains superhydrophobic but becomes highly adhesive.
ACCESSION #
43720434

 

Related Articles

  • Synthesis of HDLC films from solid carbon. Mills, R.L.; Sankar, J.; Ray, P.; Voigt, A.; He, J.; Dhandapani, B. // Journal of Materials Science;May2004, Vol. 39 Issue 10, p3309 

    Diamond-like carbon (DLC) films were synthesized on silicon substrates from solid carbon by a very low power (∼60 W) microwave plasma chemical vapor deposition (MPCVD) reaction of a mixture of 90-70% helium and 10-30% hydrogen. It is proposed that He+ served as a catalyst with atomic...

  • Residue-free nanofilling with wetting solutions. Tae-il Kim; S. Joon Kwon; Jiyeon Lee; Lee, Hong H. // Applied Physics Letters;10/23/2006, Vol. 89 Issue 17, p173115 

    The stability of a liquid filament between two surfaces is utilized to fill nanochannels with no residue on the rest of the top surface. The stability condition is that the average contact angle of the liquid with the surfaces is less than 45°. This condition means that a liquid that wets a...

  • Electron stimulated desorption, DIET, and photochemistry at surfaces: A personal recollection. Yates, John T. // Journal of Chemical Physics;9/7/2012, Vol. 137 Issue 9, p091701 

    A personal recollection of the beginning of the field of photochemistry on surfaces is given.

  • Method for characterizing self-assembled monolayers as antirelaxation wall coatings for alkali vapor cells. Yi, Y. W.; Robinson, H. G.; Knappe, S.; Maclennan, J. E.; Jones, C. D.; Zhu, C.; Clark, N. A.; Kitching, J. // Journal of Applied Physics;Jul2008, Vol. 104 Issue 2, p023534 

    We describe a method for characterizing self-assembled monolayers (SAMs) in terms of their performance as antirelaxation wall coatings for alkali atom vapor cells. A combination of initial surface analysis and subsequent laser spectroscopy is used to provide insight into the quality of the...

  • Oriented immobilization of IgG on hydroxylated Si(001) surfaces via protein-A by a multiple-step process based on a self-assembly approach. Demirel, G.; Çağlayan, M. O.; Garipcan, B.; Duman, M.; Pişkin, E. // Journal of Materials Science;Nov2007, Vol. 42 Issue 22, p9402 

    The aim of this study was the oriented immobilization of IgG molecules on the silicon surfaces. A multiple-step procedure was applied for oriented immobilization of IgG in this study. After hydroxylation of the Si(001) surfaces, 3-glycidoxypropyltrimethoxysilane (GPTS) molecules were...

  • Crystal structure of mammalian {alpha}1,6-fucosyltransferase, FUT8. Hideyuki Ihara; Yoshitaka Ikeda; Sachiko Toma; Xiangchun Wang; Tadashi Suzuki; Jianguo Gu; Eiji Miyoshi; Tomitake Tsukihara; Koichi Honke; Akio Matsumoto; Atsushi Nakagawa; Naoyuki Taniguchi // Glycobiology;May2007, Vol. 17 Issue 5, p455 

    Mammalian a1,6-fucosyltransferase (FUT8) catalyses the transfer of a fucose residue from a donor substrate, guanosine 5'-diphosphate-ß-l-fucose to the reducing terminal N-acetylglucosamine (GlcNAc) of the core structure of an asparagine-linked oligosaccharide. a1,6-Fucosylation, also referred...

  • Erratum: Thin liquid film structure and stability: The role of depletion and surface-induced structural forces [J. Chem. Phys. 103, 6653 (1995)]. Chu, X. L.; Nikolov, A.; Wasan, D. T. // Journal of Chemical Physics;9/15/1996, Vol. 105 Issue 11, p4892 

    Presents a correction to the article 'Thin Liquid Film Structure and Stability: The Role of Depletion and Surface-Induced Structural Forces,' which appeared in the 1995 issue of the 'Journal of Chemical Physics.'

  • Adsorption hysteresis in ink-bottle pore. Morishige, Kunimitsu; Tateishi, Noriko // Journal of Chemical Physics;7/22/2003, Vol. 119 Issue 4, p2301 

    To examine the mechanism of the adsorption hysteresis in ink-bottle pores, we measured the temperature dependence of the adsorption-desorption isotherms of argon, oxygen, and carbon dioxide onto SBA-16 ordered mesoporous material with cagelike pores. The hysteresis loop always shrank with...

  • Integrated siphon-based metering and sedimentation of whole blood on a hydrophilic lab-on-a-disk. J. Steigert; T. Brenner; M. Grumann; L. Riegger; S. Lutz; J. Ducrée // Biomedical Microdevices;Oct2007, Vol. 9 Issue 5, p675 

    Abstract  In this paper, we present a novel and fully integrated centrifugal microfluidic “lab-on-a-disk” for rapid colorimetric assays in human whole blood. All essential steps comprising blood sampling, metering, plasma extraction and the final optical...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics