Formation mechanism and morphology modulation of honeycomb hybrid films made of polyoxometalates/surfactants at the air/water interface

Assembly of Polyoxometalate-Based Composite Materials

“…Also, Hao et al made photoluminescent uniform porous honeycomb films based on (DODMA) 9 [EuW 10 O 36 ] that were constructed at the air/water interface using microwater droplets as a template without any extra moist airflow [18]. The formation mechanism of the honeycomb-patterned films at the air/water interface was concluded that the condensed micrometer water droplets with hexagonal array by the quick evaporation of solvents were considered as templates for the formation of ordered microporous films [18,19].…”

Photoluminescent Honeycomb Structures from Polyoxometalates and an Imidazolium‐Based Ionic Liquid Bearing a π‐Conjugated Moiety and a Branched Aliphatic Chain

“…[6][7][8][9] Recentp rogress has been focused on furthere xpanding the field from fundamental researcht oe ncouraging industrialized applications by the productiono fl arge-area honeycomb structures. [23][24][25][26][27] The films containing honeycombs tructures with varying sizes and morphologies have been successfully used as molecular sieves, [28] sensors, [29] superhydrophobic coatings, [30] antibacterial surfaces, [31] cell culture reservoirs, [32] and templates for electrodeposition of Au or Ag particlesfor surface-enhanced Ramanscattering (SERS). Up to now,v arious candidates have been explored to form honeycomb structures.B esides polymers with diversec ompositions and structures, [12][13][14][15] av ariety of materials with attractive properties have also been tried, including carbon nanotubes( CNTs), [16,17] grapheneo xide (GO), [18] proteins, [19] small organic molecules, [20][21][22] and inorganic-organic hybrids.…”

“…Up to now,v arious candidates have been explored to form honeycomb structures.B esides polymers with diversec ompositions and structures, [12][13][14][15] av ariety of materials with attractive properties have also been tried, including carbon nanotubes( CNTs), [16,17] grapheneo xide (GO), [18] proteins, [19] small organic molecules, [20][21][22] and inorganic-organic hybrids. [23][24][25][26][27] The films containing honeycombs tructures with varying sizes and morphologies have been successfully used as molecular sieves, [28] sensors, [29] superhydrophobic coatings, [30] antibacterial surfaces, [31] cell culture reservoirs, [32] and templates for electrodeposition of Au or Ag particlesfor surface-enhanced Ramanscattering (SERS). [33,34] Polyoxometalates (POMs) are ab ig class of polyanions which consist of early transition metals in their highest oxidation states.…”

Tunable Morphology of 2D Honeycomb‐Patterned Films and the Hydrophobicity of a Ferrocenyl‐Based Oligomer

“…Recently, our group has developed a simpler method to construct highly ordered porous honeycomb films of surfactant-encapsulated polyoxometalates at an air/water interface without any moist airflow across the solution surface. [31][32][33] This method can easily transfer the films onto different substrates for further characterization and application, such as directionally electrodepositing gold nanoparticles into honeycomb macropores [34] and preparing freestanding honeycomb films. [35] Herein, we extend the breath-figure method to an amphiphilic ferrocenyl-based oligomer 1 with ferrocene units in the main chain and hydrophobic cholesteryl groups as side chains (Scheme 1; the synthesis and characterization of the oligomer are described elsewhere [36] ).…”

“…AFM observation of the 3D array (Figure 4e) further confirms the surface to-A C H T U N G T R E N N U N G pology of the honeycomb films. In our previous report, [32] it is speculated that the pore size of the film will be larger with increasing boiling point (bp) or decreasing vapor pressure (vp) of the solvent. That is because the evaporation rate of the solvent decreases, and the condensed water droplets have sufficient time to grow.…”