Enhanced Resilience to Thermal Decay of Imprinted Nanopatterns in Thin Films by Bare Nanoparticles Compared to Polymer-Grafted Nanoparticles

Precision structured polymer thin films with microstructures comparable to or greater than the film thickness are highly desired in many applications. Such micro-patterned thin films, however, are difficult to fabricate using the standard hot embossing technology where both halves of the mold are made of hard materials. This study investigated a rubber-assisted embossing process for structuring thin polymer films. The advantages of the rubber backup instead of a hard support include but are not limited to 1) simplifying the embossing tool, 2) protecting the embossing master, 3) facilitating embossing pressure buildup, and 4) accommodating conformal forming of microscale shell patterns. Several design and process variables including rubber hardness, embossing temperature, embossing pressure and holding time were carefully studied. Thin polystyrene films in a thickness of 25 μm were accurately patterned with microgrooves of characteristic dimensions on the order of 100 μm.

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Fabrication of porous thin films of block copolymer at the liquid/liquid interface and construction of composite films doped with noble metal nanoparticles

RSC Advances ◽

10.1039/c5ra12001b ◽

2015 ◽

Vol 5 (85) ◽

pp. 69339-69347 ◽

Cited By ~ 3

Author(s):

Qian Wang ◽

Xingjuan Zhao ◽

Xiao-Kai Zhang ◽

Yong-Ill Lee ◽

Hong-Guo Liu

Keyword(s):

Thin Films ◽

Block Copolymer ◽

Metal Nanoparticles ◽

Polymer Film ◽

Noble Metal ◽

Composite Films ◽

Liquid Interface ◽

Porous Polymer ◽

Noble Metal Nanoparticles ◽

Porous Thin Films

A porous polymer film was fabricated at a liquid/liquid interface that can be used as a matrix to form various composite films.

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Cross-Coupling Polymerization at Iodophenyl Thin Films Prepared by Spontaneous Grafting of a Diazonium Salt

10.26434/chemrxiv.11388678.v2 ◽

2020 ◽

Author(s):

Nicholas Marshall ◽

Andres Rodriguez

Keyword(s):

Thin Films ◽

Polymer Film ◽

Film Growth ◽

Diazonium Salt ◽

Cross Coupling ◽

Chain Termination ◽

Kinetics Of ◽

Coupling Polymerization

Development of a method for the surface-initiated Kumada cross-coupling polymerization based on 4-iodophenyldiazonium salt thin films. Studies of the kinetics of chain termination and polymer film growth, and use of this method to make polythiophene brushes.<br>

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Porous Ultra-Thin Films from Photocleavable Block Copolymers: In-Situ Degradation Kinetics Study of Pore Material

Polymers ◽

10.3390/polym12040781 ◽

2020 ◽

Vol 12 (4) ◽

pp. 781 ◽

Cited By ~ 1

Author(s):

Sedakat Altinpinar ◽

Wael Ali ◽

Patrick Schuchardt ◽

Pinar Yildiz ◽

Hui Zhao ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Block Copolymer ◽

Block Copolymers ◽

Polymer Film ◽

Uv Exposure ◽

Significant Information ◽

X Ray ◽

Washing Process

On the basis of the major application for block copolymers to use them as separation membranes, lithographic mask, and as templates, the preparation of highly oriented nanoporous thin films requires the selective removal of the minor phase from the pores. In the scope of this study, thin film of polystyrene-block-poly(ethylene oxide) block copolymer with a photocleavable junction groups based on ortho-nitrobenzylester (ONB) (PS-hν-PEO) was papered via the spin coating technique followed by solvent annealing to obtain highly-ordered cylindrical domains. The polymer blocks are cleaved by means of a mild UV exposure and then the pore material is washed out of the polymer film by ultra-pure water resulting in arrays of nanoporous thin films to remove one block. The removal of the PEO materials from the pores was proven using the grazing-incidence small-angle X-ray scattering (GISAXS) technique. The treatment of the polymer film during the washing process was observed in real time after two different UV exposure time (1 and 4 h) in order to draw conclusions regarding the dynamics of the removal process. In-situ X-ray reflectivity measurements provide statistically significant information about the change in the layer thickness as well as the roughness and electron density of the polymer film during pore formation. 4 H UV exposure was found to be more efficient for PEO cleavage. By in-situ SFM measurements, the structure of the ultra-thin block copolymer films was also analysed and, thus, the kinetics of the washing process was elaborated. The results from both measurements confirmed that the washing procedure induces irreversible change in morphology to the surface of the thin film.

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Envelope analysis in spectroscopic ellipsometry of thin films. Application to a weakly-absorbing polymer film

Thin Solid Films ◽

10.1016/j.tsf.2004.01.014 ◽

2004 ◽

Vol 455-456 ◽

pp. 288-291 ◽

Cited By ~ 1

Author(s):

J.C. Martinez-Antón ◽

J.A. Gómez-Pedrero ◽

A. Álvarez-Herrero

Keyword(s):

Thin Films ◽

Polymer Film ◽

Spectroscopic Ellipsometry ◽

Envelope Analysis

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Photo-Alignment Behavior of Mesoporous Silica Thin Films Synthesized on a Photo-Cross-Linkable Polymer Film

Chemistry of Materials ◽

10.1021/cm052359y ◽

2006 ◽

Vol 18 (5) ◽

pp. 1226-1234 ◽

Cited By ~ 50

Author(s):

Haruhiko Fukumoto ◽

Shusaku Nagano ◽

Nobuhiro Kawatsuki ◽

Takahiro Seki

Keyword(s):

Thin Films ◽

Mesoporous Silica ◽

Polymer Film ◽

Silica Thin Films ◽

Photo Alignment

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Fabrication of superhydrophobic thin films on various substrates using SiO2 nanoparticles coated with polydimethylsiloxane: towards the development of shielding layers for gas sensors

RSC Advances ◽

10.1039/c5ra05470b ◽

2015 ◽

Vol 5 (51) ◽

pp. 40595-40602 ◽

Cited By ~ 21

Author(s):

Eun Ji Park ◽

Bo Ra Kim ◽

Dae Keun Park ◽

Sang Wook Han ◽

Dae Han Kim ◽

...

Keyword(s):

Thin Films ◽

Gas Sensors ◽

Gas Permeability ◽

Sio2 Nanoparticles

Superhydrophobic membranes with high gas permeability were prepared and characterized.

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NANOPATTERNED POLYMER THIN FILMS

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863505002736 ◽

2005 ◽

Vol 14 (03) ◽

pp. 299-303

Author(s):

CHUL-SIK KEE ◽

KEUN BYUNG YOON ◽

CHOON-GI CHOI ◽

JIN-TAE KIM ◽

SANG PIL HAN ◽

...

Keyword(s):

Thin Films ◽

Optical Properties ◽

Polymer Film ◽

Polymer Thin Films ◽

Hot Embossing ◽

Triangular Array ◽

Average Radius ◽

Average Depth ◽

Two Dimensional

We fabricated polymer thin films with two-dimensional periodic nanopatterns using an imprinting technique with the hot embossing process. The silicon stamp employed in the imprinting has a triangular array of circular rods. The period of the array is 410 nm, and the radius and the height of a rod are 100 nm and 150 nm, respectively. The imprinting in the polymer film results in holes with the average radius of 105 nm and the average depth of 130 nm, which are close to the dimension of the stamp. The results show that the thermal imprinting process can be suitable for the implementation of nanopatterned polymer thin films. The interesting optical properties of the nanopatterned polymer thin films are also discussed.

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Planarization with Cyclotene™ 3022 (BCB) Polymer Coatings

MRS Proceedings ◽

10.1557/proc-308-517 ◽

1993 ◽

Vol 308 ◽

Cited By ~ 9

Author(s):

T.M. Stokich ◽

C.C. Fulks ◽

M.T. Bernius ◽

D.C. Burdeaux ◽

P.E. Garrou ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Film Thickness ◽

Polymer Film ◽

Polymer Coatings ◽

Polymer Thin Film ◽

Film Coatings ◽

Thin Film Coatings ◽

Processing Procedure ◽

The Mean

ABSTRACTThis work examines the planarization of polymer thin film coatings derived from Cyclotene™ 3022 prepolymer resins. Cyclotene™ 3022 is a divinyl siloxane bis-benzocyclobutene prepolymer (DVS-BCB, CAS 117732-87-3). It is used primarily as a dielectric in microelectronics applications.Using profilometry, planarization measurements have been made on thin films spun over features consisting of lines and trenches. Feature widths have been varied from 2 to 1000 μm and the feature depths and film thickness have been varied from 1 to 16 μm. Effects of the processing procedure, resin concentration and resin additives have been explored. Local (versus global) planarization will be discussed.Planarization has been found to depend on all feature dimensions and the polymer film thickness. Lines or other structures having a width of 100 μm or less can be planarized to 90% or better with standard commercial formulations of Cyclotene™ 3022, provided that the mean film thickness is twice the line-height or feature-depth. Metals such as Al, Cu, Cr and Ti can all be planarized to this degree; however, surface preparations may influence the result.

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