Fabrication of Freestanding Nanoporous Polyethersulfone Membranes Using Organometallic Polymer Resists Patterned by Nanosphere Lithography

Acikgöz, Canet; Ling, Xing Yi; Phang, In Yee; Hempenius, Mark A.; Reinhoudt, David N.; Huskens, Jurriaan; Vancso, G. Julius

doi:10.1002/adma.200803647

Cited by 45 publications

(27 citation statements)

References 35 publications

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“…Figure a shows the optical image of the macroinitiator film immersed in acetone after 20 s. The acetone diffuses through the film or from the side, dissolves the cellulose acetate, and releases the macroinitiator film from the substrate. Similar strategy has been used to release the nanoporous polyethersulfone membrane from silicon wafer and in fabrication of N ‐dodecylacrylamide polymer nanosheet deposited via Langmuir–Blodgett . The presence of wrinkles and ridges indicates the partial separation of the film from the silicon wafer.…”

Section: Resultssupporting

confidence: 92%

Free-Standing Macroinitiator Thin Film for Bifacial Polymer Chain Grafting

Leon

2015

Macromol. Chem. Phys.

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The study reports the fabrication of a free-standing reactive macroinitiator thin fi lm via simple layer-by-layer assembly and dissolution of the sacrifi cial layer. The resulting macroinitiator thin fi lm can be postfunctionalized by grafting polymer brush from it. Since the thin fi lm is free from any substrate, bifacial functionalization can be done on the free-standing fi lm. This approach is expected to signifi cantly increase the functionality of free-standing polymer brush for most applications like catalysis and sensor because of the increase in functional group density per area.

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Section: Resultssupporting

confidence: 92%

Free-Standing Macroinitiator Thin Film for Bifacial Polymer Chain Grafting

Leon

2015

Macromol. Chem. Phys.

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“…Cross‐sectional schemes of nanoporous membranes fabricated through NSL: (A) PHEMA hydrogel brush membrane fabricated using PS nanospheres , (B) SiN membrane fabricated through a Cr etch mask produced from PS nanospheres , (C) aluminum oxide membrane fabricated by patterned anodization through PS nanospheres , and (D) polymeric membrane lifted‐off from its processing substrate by dissolving a cellulose acetate sacrificial layer .…”

Section: Nanosphere Lithographymentioning

confidence: 99%

“…Micrographs corresponding to fabricated membranes: (A) SiN membrane by self‐organizing polymers adapted from ; (B) polyethersulfone membrane by nanosphere lithography, adapted from ; (C) aluminum oxide membrane by anodization, adapted from ; (D) polystyrene membrane by nanoimprint lithography, adapted from ; and (E) silicon membrane by solid phase crystallization, adapted from .…”

Section: Introductionmentioning

confidence: 99%

Fabrication techniques enabling ultrathin nanostructured membranes for separations

Mireles

Gaborski

2017

Electrophoresis

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The fabrication of nanostructured materials is an area of continuous improvement and innovative techniques that fulfill the demand of many fields of research and development. The continuously decreasing size of the smallest patternable feature has expanded the catalog of methods enabling the fabrication of nanostructured materials. Several of these nanofabrication techniques have sprouted from applications requiring nanoporous membranes such as molecular separations, cell culture, and plasmonics. This review summarizes methods that successfully produce through-pores in ultrathin films exhibiting an approximate pore size to thickness ratio of one, which has been shown to be beneficial due to high permeability and improved separation potential. The material reviewed includes large-area, parallel, and affordable approaches such as self-organizing polymers, nanosphere lithography, anodization, nanoimprint lithography as well as others such as solid phase crystallization and nanosphere lens lithography. The aim of this review is to provide a set of inexpensive fabrication techniques to produce nanostructured materials exhibiting pores ranging from 10 to 350 nm and exhibiting a pore size to thickness ratio close to one. The fabrication methods described in this work have reported the successful manufacture of nanoporous membranes exhibiting the ideal characteristics to improve selectivity and permeability when applied as separation media in ultrafiltration.

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“…Nanoparticles have also been used to fabricate porous membranes [92–94] . For example, McDonald et al.…”

Section: Separation Membranes Constructed From Inorganic Nanofibermentioning

confidence: 99%

Separation Membranes Constructed from Inorganic Nanofibers by Filtration Technique

Yu¹,

Mao²,

Peng³

2012

The Chemical Record

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Nanofibrous materials have been extensively investigated and used as building blocks for various nanodevices, due to their unique one-dimensional structures. Recently, novel membranes constructed by using nanofibers have been reported by various techniques. Here, we will give a critical review of our recent research on the general solution processed unique sub-3 nm thin metal hydroxide nanofibers and their application for constructing ultrathin separation membranes via filtration technique. The superior separation performances of these membranes hold the promising future for pressure-driven membrane separation processes.

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Fabrication of Freestanding Nanoporous Polyethersulfone Membranes Using Organometallic Polymer Resists Patterned by Nanosphere Lithography

Cited by 45 publications

References 35 publications

Free-Standing Macroinitiator Thin Film for Bifacial Polymer Chain Grafting

Free-Standing Macroinitiator Thin Film for Bifacial Polymer Chain Grafting

Fabrication techniques enabling ultrathin nanostructured membranes for separations

Separation Membranes Constructed from Inorganic Nanofibers by Filtration Technique

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