Nanoporous Films with Sub-10 nm in Pore Size from Acid-Cleavable Block Copolymers

2017 ◽  
Vol 38 (5) ◽  
pp. 1600662 ◽  
Author(s):  
Yayuan Li ◽  
Yawei Xu ◽  
Shubo Cao ◽  
Yongbin Zhao ◽  
Ting Qu ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Nanoporous Films

Large Pore Size Nanoporous Materials from the Self-Assembly of Asymmetric Bottlebrush Block Copolymers

Nano Letters ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 998-1001 ◽  
Author(s):  
Justin Bolton ◽  
Travis S. Bailey ◽  
Javid Rzayev
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Self Assembly ◽  
Nanoporous Materials ◽  
The Self ◽  
Large Pore ◽  
Large Pore Size

scholarly journals Fractionation of block copolymers for pore size control and reduced dispersity in mesoporous inorganic thin films

Nanoscale ◽  
2020 ◽  
Vol 12 (35) ◽  
pp. 18455-18462
Author(s):  
Alberto Alvarez-Fernandez ◽  
Barry Reid ◽  
Jugal Suthar ◽  
Swan Yia Choy ◽  
Maximiliano Jara Fornerod ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Pore Size ◽  
Size Control ◽  
Widespread Application ◽  
Inorganic Thin Films ◽  
Pore Size Control

Inorganic mesoporous coatings find widespread application. In many cases, control over the pore dimensions is of paramount importance. To this end, we establish a powerful route to pore size and dispersity control.

Electrical, Mechanical, and Structural Properties of Fluoro-Containing Poly(silsesquioxanes) Based Porous Low k Thin Films

2003 ◽  
Vol 766 ◽  
Author(s):  
Jingyu Hyeon-Lee ◽  
Jihoon Rhee ◽  
Jungbae Kim ◽  
Jin-Heong Yim ◽  
Seok Chang
Keyword(s):  
Thin Films ◽  
Pore Size ◽  
Dielectric Constants ◽  
Commercial Application ◽  
Porous Films ◽  
Low Dielectric ◽  
Nanoporous Films ◽  
Positronium Annihilation ◽  
Positronium Annihilation Lifetime Spectroscopy ◽  
Low K

AbstractLow dielectric fluoro-containing poly(silsesquioxanes) (PSSQs) have been synthesized using trifluoropropyl trimethoxysilane (TFPTMS), methyl trimethoxysilane (MTMS), and 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetra(trimethoxysilylethyl) cyclotetrasiloxane. The properties of fluorocontaining PSSQs based thin films were studied by electrical, mechanical, and structural characterization. Film was spun on a silicon substrate, baked at 150°C and 250°C for 1 minute, respectively, and cured in the furnace at 420°C for 1 hour under vacuum condition. Thermally decomposable trifluoropropyl groups of the fluoro-containing PSSQ were served as a pore generator and partially contributed to lower a dielectric constant. â-cyclodextrin (CD) was also employed as a pore generator. The concentration of the pore generator in the film was varied from 0 to 30 %. The dielectric constants of the porous PSSQ films were found to be in the range of 2.7 – 1.9 (at 100 kHz). Hardness and Young's modulus of the films were measured by nano-indentation. The elastic modulus and hardness of the porous films were well correlated with the concentration of the pore generators. Positronium Annihilation Lifetime Spectroscopy (PALS) was employed to characterize a pore size of the porous fluoro-containing PSSQ film. The pore size of the film was less than 2.2 nm. The nanoporous films showed quite promising properties for commercial application.

Control of pore size and pore uniformity in films based on self-assembling block copolymers

2014 ◽  
Vol 52 (23) ◽  
pp. 1568-1579 ◽  
Author(s):  
Erik J. Vriezekolk ◽  
Eddy de Weerd ◽  
Wiebe M. de Vos ◽  
Kitty Nijmeijer
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Self Assembling

scholarly journals Nanoparticle-Induced Self-Assembly of Block Copolymers into Nanoporous Films at the Air–Water Interface

ACS Nano ◽  
2020 ◽  
Vol 14 (9) ◽  
pp. 12203-12209
Author(s):  
Seulki Kang ◽  
Du Yeol Ryu ◽  
Emilie Ringe ◽  
Robert J. Hickey ◽  
So-Jung Park
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Water Interface ◽  
Nanoporous Films ◽  
Air Water Interface

scholarly journals The Influence of Acids on Tuning the Pore Size of Mesoporous TiO2 Templated by Non-Ionic Block Copolymers

2018 ◽  
Vol 2018 (1) ◽  
pp. 62-65 ◽  
Author(s):  
Stefano Loreto ◽  
Hans Vanrompay ◽  
Myrjam Mertens ◽  
Sara Bals ◽  
Vera Meynen
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Mesoporous Tio2

scholarly journals Nanoporous Polymer Films from Immiscible Polymer Blends: Pore Size and Composition Dependence

2004 ◽  
Vol 856 ◽  
Author(s):  
Tong Liu ◽  
Rahmi Ozisik ◽  
Richard W. Siegel
Keyword(s):  
Pore Size ◽  
Polymer Films ◽  
Spin Coating ◽  
Composition Dependence ◽  
Processing Parameters ◽  
Immiscible Polymer Blends ◽  
Immiscible Blends ◽  
Nanoporous Films ◽  
Phase Separation Process ◽  
Poly Caprolactone

ABSTRACTNanoporous polymer films have been prepared using immiscible blends of polyetherimide (PEI) and poly(caprolactone diol) (PCLD). The films were prepared by spin-coating from a common solvent — dichloromethane (DCM). To create the nanoporous films, PCLD was removed by immersing the films in acetone, which dissolves PCLD only. Field emission scanning electron microscopy was used to study the porous structure. The pore structure of the films was affected by many factors such as composition of the blend, molecular weight, and various processing parameters. The formation of nanometer size pores was mainly due to the fast phase separation process during spin-coating. The pore size and pore size distribution was found to depend on the blend composition.

Fabrication of Novel Nanoporous Films in Moisture-in-Oil Sensors via Chemical Dealloying of Cu-Cr using Combinatorial Search of Cu–Cr Alloy Compositions

MRS Advances ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 225-232 ◽  
Author(s):  
Yusuke Yoshii ◽  
Junpei Sakurai ◽  
Mizue Mizoshiri ◽  
Seiichi Hata
Keyword(s):  
Pore Size ◽  
The Novel ◽  
Combinatorial Search ◽  
Initial Composition ◽  
Compositional Gradient ◽  
Nanoporous Film ◽  
Cr Content ◽  
Nanoporous Films ◽  
Deposited Film

ABSTRACTAn as-deposited film with a Cr compositional gradient (22–15 at.% Cr) was immersed in 22.5% HNO3 for 15 hours. In the part of the film with initial Cr content in the range of 22–18 at.%, Cu dealloying resulted in sufficient Cu dealloying (final Cr content = 33–80 at.%) without film dissolution. Using the film with optimal initial composition Cu82Cr18, we successfully fabricated a nanoporous film with a pore size in the range of 20–40 nm. As a result of the formation of Cr2O3 during dealloying, this film was transparent and exhibited an insulation state. The novel nanoporous film is expected to be applied as a nanofilter in moisture-in-oil sensors.

scholarly journals The Influence of Acids on Tuning the Pore Size of Mesoporous TiO2 Templated by Non-Ionic Block Copolymers

2018 ◽  
Vol 2018 (45) ◽  
pp. 4932-4932
Author(s):  
Stefano Loreto ◽  
Hans Vanrompay ◽  
Myrjam Mertens ◽  
Sara Bals ◽  
Vera Meynen
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Mesoporous Tio2

Synthesis of Porous Noble Metal Films With Tunable Porosity by Timed Dealloying

2018 ◽  
Author(s):  
Stanislau Niauzorau ◽  
Placid Ferreira ◽  
Bruno Azeredo
Keyword(s):  
Thin Films ◽  
Pore Size ◽  
Pore Volume ◽  
Volume Fraction ◽  
Chemical Catalysis ◽  
Nanoporous Films ◽  
Simple Strategy ◽  
Pore Volume Fraction ◽  
Nanoporous Metal ◽  
High Degree

Nanoporous metal foams have an increasing importance in applications such as chemical catalysis, energy storage, and nanomedicine. This paper examines a simple strategy for controlling the pore volume fraction and pore size of nanoporous films synthesized by dealloying thin-films. By means of controlling the temperature and concentration of nitric acid in dealloying of AgAu thin-films, partially dealloyed AgAu nanoporous films are produced with a high degree of control over the pore size and pore volume fraction. Such capability enables the design of nanoporous metal catalysts materials with desired morphology.

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