Grafted Functional Polymer Nanostructures Patterned Bottom-Up by Colloidal Lithography and Initiated Chemical Vapor Deposition (iCVD)

Abstract

Colloidal lithography, a popular inexpensive alternative to conventional lithography, uses two−dimensional self-assembled monolayer arrays of colloidal nanoparticles as a lithographic template. Combined with initiated chemical vapor deposition (iCVD), which offers unprecedented opportunity for producing grafted polymeric layers, this work demonstrates a generic “bottom-up” process as an inexpensive, simple, and environmentally friendly technique for creating robust well-ordered arrays of functional patterned polymeric nanostructures up to 500 nm in height. These grafted “nanobowl” patterns are produced for a broad material set of functional organic, fluorinated, and silicon containing polymers. These polymers fully retain the organic functionality of their monomeric precursors, are free of wetting defects, and are robustly tethered to the underlying substrate as shown by their ability to withstand aggressive solvent. Furthermore, using this method we pattern a novel low dielectric constant polymer down to 25 nm without the need for environmentally harmful solvents.

Synergistic Prevention of Biofouling in Seawater Desalination by Zwitterionic Surfaces and Low‐Level Chlorination

“…Prior to deposition, commercial RO membranes (Koch Membrane System, TFC-HR) were cleaned with filtered nitrogen, and then treated with oxygen plasma for 1 minute and then placed in the reactor chamber. The glass slides were treated with trichlorovinylsilane (Aldrich, 97%), as described previously [34]. During iCVD depositions, 4VP (Aldrich, 95%) and DVB (Aldrich, 80%) monomers were heated up to 50 °C and 65 °C in glass jars, respectively and delivered into the reactor using mass flow controllers (1150 MFC, MKS Instruments).…”

Fabrication of honeycomb-patterned polyalkylcyanoacrylate films from monomer solution by breath figures method

“…Several strategies such as templating [7,[11][12][13][14][15], self-assembly [16][17][18] and ''breath figures" (BFs) method [19][20][21][22][23][24][25][26], have been developed for fabricating micro-porous materials. Among these methods, BFs is a simple and versatile technique which can dynamically control both the pore formation process and the morphology of the resultant pores [27,28].…”

Reactive, intumescent, halogen‐free flame retardant for polypropylene

“…33,34 Such a characteristic absorption was observed at 1468 cm 21 for EADP. In the compounding process for making PP/EADP composites, when homopolymerization happens, the splitting of the 1468 cm 21 signal is observed, and an absorption for quaternary carbon atom around 1245 cm 21 also appears.…”