Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/3174
Title: Creation of “Rose Petal” and “Lotus Leaf” Effects on Alumina by Surface Functionalization and Metal-Ion Coordination
Authors: Mukhopadhyay, R D
Vedhanarayanan, B
Ajayaghosh, A
Keywords: coordination polymers
lotus effect
surface functionalization
Issue Date: 11-Dec-2017
Publisher: Wiley
Citation: Angewandte Chemie - International Edition, 56(50):16018–16022
Abstract: Functional differences between superhydrophobic surfaces, such as lotus leaf and rose petals, are due to the subtle architectural features created by nature. Mimicry of these surfaces with synthetic molecules continues to be fascinating as well as challenging. Herein, we demonstrate how inherently hydrophilic alumina surface can be modified to give two distinct superhydrophobic behaviors. Functionalization of alumina with an organic ligand resulted in a rose-petal-like surface (water pinning) with a contact angle of 1458 and a high contact angle hysteresis (:698). Subsequent interaction of the ligand with Zn2+ resulted in a lotus-leaf-like surface with water rolling behavior owing to high contact angle (1658) and lowcontact- angle-hysteresis (:28). In both cases, coating of an aromatic bis-aldehyde with alkoxy chain substituents was necessary to emulate the nanowaxy cuticular feature of natural superhydrophobic materials.
Appears in Collections:2017

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