2D Protein Supramolecular Nanofilm with Exceptionally Large Area and Emergent Functions

Abstract

2D nanofilms assembled by pure protein with a macroscopic area and multiple functions can be directly formed at the air/water interface or at the solid surface at a timescale of several minutes. The multifunctionality of the nanofilm coating is demonstrated by both top-down and bottom-up micro-/nanoscale interfacial engineering, including surface modification, all-water-based photo/electron-beam lithography, and electroless deposition.

Amyloid‐Like Rapid Surface Modification for Antifouling and In‐Depth Remineralization of Dentine Tubules to Treat Dental Hypersensitivity

“…Moreover, the leaching of unpolymerized monomers from adhesives has been implicated in hypersensitivity, cytotoxicity, genotoxicity, estrogenicity, and alteration of immune responses. [10,11] In the present study, we report a greatly deep occlusion of DTs by coating DTs with antifouling amyloid-like lysozyme oligomer aggregates and occluding with in situ formation of a biomimetic hydroxyapatite (HAp) layer on the coating. To overcome the drawbacks of current products, developing a rapid and convenient occlusion technique in deep DTs combining antifouling and easy remineralization is necessary but challenging to treat DH with long-term curing stability.…”

“…[10] In the present work, hydrophilic PEG grafts would not disturb the interfacial adhesion feature of the amyloid-like oligomers, because by simply contacting (spraying, dip-coating or smearing) the target surface with the lyso-PEG emulsion (lyso-PEG 1 mg mL −1 , pH 7.5), the PEGylated PTL nanofilm could easily attach to various substances in 1-5 min (Movie S1, Supporting Information), such as mica, silica wafer, glass, Au, poly(ethylene terephthalate), and indium tin oxide. [10] In the present work, hydrophilic PEG grafts would not disturb the interfacial adhesion feature of the amyloid-like oligomers, because by simply contacting (spraying, dip-coating or smearing) the target surface with the lyso-PEG emulsion (lyso-PEG 1 mg mL −1 , pH 7.5), the PEGylated PTL nanofilm could easily attach to various substances in 1-5 min (Movie S1, Supporting Information), such as mica, silica wafer, glass, Au, poly(ethylene terephthalate), and indium tin oxide.…”

“…Furthermore, the water contact angle (WCA; approximately 60°) and C/N atomic ratio on these modified surfaces were consistent (Figure 1h,i), exhibiting very low roughness (the root mean square on the lyso-PEG oligomer-coated mica < 1.5 nm) and almost 100% transmittance between 350 and 800 nm ( Figure 1j). [14] The lyso-PEG coating did not show obvious changes in surface topography after being subjected to various harsh conditions, such as extreme pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11), organic solvents, adhesive tape peeling and even plasma irradiation ( Figure S6, Supporting Information), indicating the good robustness of the lyso-PEG film for a wide range of environmental conditions. [14] The lyso-PEG coating did not show obvious changes in surface topography after being subjected to various harsh conditions, such as extreme pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11), organic solvents, adhesive tape peeling and even plasma irradiation ( Figure S6, Supporting Information), indicating the good robustness of the lyso-PEG film for a wide range of environmental conditions.…”

Facile Preparation of Hydrophobic Aluminum Oxide Film via Sol-Gel Method

“…The process was simple and easy to operate, using AOFs hydrophobic properties of application in many fields. In catalytic process, the positive charges on the AOFs generated an abundant adsorption of negative ${\text{PdCl}}_4^{2-}$ catalyst layer to achieve uniform metal deposition with good adhesion properties, then immersed in the Cu electroless bath to grow Cu (Wang et al, 2016). In order to study morphology and conductivity for electroless Cu deposition, SEM micrographs, photographic images, and circuits to light a light-emitting diode (LED) bulb were illustrated in Figures 6B–M.…”

“…Solution A contains NaOH (12 g dm −3 ), CuSO 4 ·5H 2 O (13 g dm −3 ) and C 4 H 4 O 6 KNa·4H 2 O (29 g dm −3 ) in deionized water. Solution B is a HCHO (9.5 cm 3 dm −3 ) aqueous solution (Wang et al, 2016). Then, rinsing samples with deionized water and drying by air.…”