Characterisation of microstructure and evaluation of optical and EPR properties of superhydrophobic copper dodecanoate films

Chakradhar, RPS and Dinesh Kumar, V and Shivakumara, IS and Rao, JL and Bharathibai, Basu J (2012) Characterisation of microstructure and evaluation of optical and EPR properties of superhydrophobic copper dodecanoate films. Surface and Interface Analysis , 44 (4). pp. 412-417.

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    Abstract

    Copper dodecanoate films prepared by emulsion method exhibit superhydrophobic property with water contact angle of 155� and sliding angle of <2�. The films have been characterised by using X-ray diffraction, field emission scanning electron microscopy and Fourier transform infrared spectroscopy techniques. Surface microstructure of copper dodecanoate consists of numerous microscale papillas of about 6–12mm in length with a diameter in the range of 360–700nm. The superhydrophobicity of the films is due to their dual micronano surface morphology. The wetting behaviour of the film surface was studied by a simple water immersion test. The results show that copper dodecanoate film retained superhydrophobic property even after immersing in water for about 140h. The optical absorption spectrum exhibits two broadbands centred at 388 and 630nm that have been assigned to 2B1g!2Eg and 2B1g!2B2g transitions of Cu2+ ions, respectively. The electron paramagnetic resonance spectrum exhibits two resonance signals with effective g values at g||� 2.308 and g⊥�2.071, which suggests that the unpaired electron occupies dx2–y2 orbital in th

    Item Type: Journal Article
    Uncontrolled Keywords: superhydrophobic; copper dodecanoate; water contact angle; XRD; FESEM; FTIR; EPR; optical absorption
    Subjects: CHEMISTRY AND MATERIALS > Composite Materials
    Division/Department: Surface Engineering Division, Surface Engineering Division, Other, Other, Surface Engineering Division
    Depositing User: Ms Indrani V
    Date Deposited: 25 Sep 2012 09:56
    Last Modified: 25 Sep 2012 09:56
    URI: http://nal-ir.nal.res.in/id/eprint/10876

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