Polymer Nanostructures Using Nanoporous Templates

2018 ◽  
pp. 165-203
Author(s):  
Chun-Wei Chang ◽  
Hao-Wen Ko ◽  
Jiun-Tai Chen
Keyword(s):  
Polymer Nanostructures ◽  
Nanoporous Templates

scholarly journals Kinetically Controlled Formation of Semi-crystalline Conjugated Polymer Nanostructures

2021 ◽  
Author(s):  
Peter Kei ◽  
Mitchell T. Howell ◽  
Carlos A. Chavez ◽  
Joseph C. Mai ◽  
Changwoo Do ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Polymer Nanostructures ◽  
Kinetically Controlled

scholarly journals Precise Synthesis and Thin Film Self-Assembly of PLLA-b-PS Bottlebrush Block Copolymers

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1412
Author(s):  
Eunkyung Ji ◽  
Cian Cummins ◽  
Guillaume Fleury
Keyword(s):  
Thin Film ◽  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Periodic Structures ◽  
One Pot ◽  
Ordered Structures ◽  
Carbonyl Chloride ◽  
Thin Film Patterning ◽  
Nanoporous Templates

The ability of bottlebrush block copolymers (BBCPs) to self-assemble into ordered large periodic structures could greatly expand the scope of photonic and membrane technologies. In this paper, we describe a two-step synthesis of poly(l-lactide)-b-polystyrene (PLLA-b-PS) BBCPs and their rapid thin-film self-assembly. PLLA chains were grown from exo-5-norbornene-2-methanol via ring-opening polymerization (ROP) of l-lactide to produce norbornene-terminated PLLA. Norbonene-terminated PS was prepared using anionic polymerization followed by a termination reaction with exo-5-norbornene-2-carbonyl chloride. PLLA-b-PS BBCPs were prepared from these two norbornenyl macromonomers by a one-pot sequential ring opening metathesis polymerization (ROMP). PLLA-b-PS BBCPs thin-films exhibited cylindrical and lamellar morphologies depending on the relative block volume fractions, with domain sizes of 46–58 nm and periodicities of 70–102 nm. Additionally, nanoporous templates were produced by the selective etching of PLLA blocks from ordered structures. The findings described in this work provide further insight into the controlled synthesis of BBCPs leading to various possible morphologies for applications requiring large periodicities. Moreover, the rapid thin film patterning strategy demonstrated (>5 min) highlights the advantages of using PLLA-b-PS BBCP materials beyond their linear BCP analogues in terms of both dimensions achievable and reduced processing time.

scholarly journals Subsurface Super-resolution Imaging of Unstained Polymer Nanostructures

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ben E. Urban ◽  
Biqin Dong ◽  
The-Quyen Nguyen ◽  
Vadim Backman ◽  
Cheng Sun ◽  
...  
Keyword(s):  
Super Resolution ◽  
Polymer Nanostructures ◽  
Resolution Imaging

Surface relief gratings generated by pulsed holography: A simple way to polymer nanostructures without isomerizing side-chains

2001 ◽  
Vol 114 (3) ◽  
pp. 1344-1349 ◽  
Author(s):  
O. Baldus ◽  
A. Leopold ◽  
R. Hagen ◽  
T. Bieringer ◽  
S. J. Zilker
Keyword(s):  
Surface Relief ◽  
Side Chains ◽  
Polymer Nanostructures ◽  
Surface Relief Gratings

scholarly journals Direct-write polymer nanolithography in ultra-high vacuum

2012 ◽  
Vol 3 ◽  
pp. 52-56 ◽  
Author(s):  
Woo-Kyung Lee ◽  
Minchul Yang ◽  
Arnaldo R Laracuente ◽  
William P King ◽  
Lloyd J Whitman ◽  
...  
Keyword(s):  
Atomic Force Microscope ◽  
Silicon Oxide ◽  
High Vacuum ◽  
Polymer Chains ◽  
Ultra High Vacuum ◽  
Direct Write ◽  
Polymer Nanostructures ◽  
Atomic Force

Polymer nanostructures were directly written onto substrates in ultra-high vacuum. The polymer ink was coated onto atomic force microscope (AFM) probes that could be heated to control the ink viscosity. Then, the ink-coated probes were placed into an ultra-high vacuum (UHV) AFM and used to write polymer nanostructures on surfaces, including surfaces cleaned in UHV. Controlling the writing speed of the tip enabled the control over the number of monolayers of the polymer ink deposited on the surface from a single to tens of monolayers, with higher writing speeds generating thinner polymer nanostructures. Deposition onto silicon oxide-terminated substrates led to polymer chains standing upright on the surface, whereas deposition onto vacuum reconstructed silicon yielded polymer chains aligned along the surface.

Biomimetic Polymer Nanostructures by Injection Molding

2003 ◽  
Vol 288 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Nikolaj Gadegaard ◽  
Stephan Mosler ◽  
Niels B. Larsen
Keyword(s):  
Injection Molding ◽  
Polymer Nanostructures ◽  
Biomimetic Polymer
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