Dip-coating for dodecylphosphonic acid derivatization on aluminum surfaces: an easy approach to superhydrophobicity

Tunable Surface Properties of Aluminum Oxide Nanoparticles from Highly Hydrophobic to Highly Hydrophilic

“…However, as both hydrophobicity and hydrophilicity are reinforced by roughness, the already high surface energy MEEA NP films become more hydrophilic due to the roughness. 40,41 This demonstrates that roughness alone is not responsible for the hydrophobicity and chemical treatment of a surface (surface functionality) also has a big role. The combination of both roughness and surface chemistry defines the wetting properties of a surface.…”

“…Increases in roughness can account for some of the observed increase in contact angle on the basis of the Wenzel and Cassie theory. , The roughness of the surfaces with MEEA NPs increased slightly from those of the native NPs to around 80 nm. However, as both hydrophobicity and hydrophilicity are reinforced by roughness, the already high surface energy MEEA NP films become more hydrophilic due to the roughness. , This demonstrates that roughness alone is not responsible for the hydrophobicity and chemical treatment of a surface (surface functionality) also has a big role. The combination of both roughness and surface chemistry defines the wetting properties of a surface.…”

Aluminium films roughened by hot water treatment and derivatized by fluoroalkyl phosphonic acid: wettability studies

“…Aluminium (Al) and its alloys have been widely used in architecture, transmission lines, electronic components, micro-and nano-technological systems, and digital micromirror devices [1][2][3][4][5][6]. Because of the ubiquitous surface contamination and corrosion [7][8][9], superamphiphobic Al surfaces with functions of selfcleaning, anti-corrosion and anti-icing have gained extensive interests [10][11][12][13][14][15][16][17][18]. It is well known that Al is easily oxidized in air, resulting in surface energy of 2.64 J m -2 for α-Al 2 O 3 and 1.67 J m -2 for γ-Al 2 O 3 , respectively [19].…”

Contact-Biocide TiO2 Surfaces by Surface-Initiated Atom Transfer Radical Polymerization with Chemically Stable Phosphonate Initiators

“…Examples with alkoxysilanes, thiols, catechols, or phosphonates have been described . Phosphonate anchors are particularly attractive for SI-ATRP on TiO 2 , since they are known to form stable covalent bonds with TiO 2 − and a number of other metals and metal oxides. − The most widely used phosphonate initiator is 11-(2-bromo-2-methylpropanoyloxy)­undecyl phosphonic acid (BUPA). − Two other bromoisobutyrates have been described but are used less frequently for SI-ATRP on metals. − The effect of the initiator structure on SI-ATRP has not yet been investigated for phosphonate anchors. However, it is known that layer stability and loading density of phosphonates on metals and metal oxides depend on steric bulk and alkyl chain length. − One might therefore expect that the same would apply to the efficiency of SI-ATRP.…”