scholarly journals Plasma-Polymer-Fluorocarbon Thin Film Coated Nanostructured-Polyethylene Terephthalate Surface with Highly Durable Superhydrophobic and Antireflective Properties

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1026
Author(s):  
Eunmi Cho ◽  
Mac Kim ◽  
Jin-Seong Park ◽  
Sang-Jin Lee
Keyword(s):  
Polyethylene Terephthalate ◽  
Superhydrophobic Surface ◽  
Plasma Polymer ◽  
Nanostructured Surface ◽  
Bending Radius ◽  
Mechanical Bending ◽  
Pet Film ◽  
Superhydrophilic Surface ◽  
High Humidity Environment ◽  
Antireflective Properties

Herein, an antireflection and superhydrophobic film was obtained by uniformly forming nanostructures on the surface of polyethylene terephthalate (PET) substrate using oxygen plasma without a pattern mask and coating plasma-polymer-fluorocarbon (PPFC) on the nanostructured surface by mid-range frequency sputtering. PPFC/nanostructured-PET showed a reflectance of 4.2%, which is 56% lower than that of the PET film. Haze was also improved. Nanostructured-PET exhibited a superhydrophilic surface due to plasma deformation and a superhydrophobic surface could be realized by coating PPFC on the nanostructured surface. The PPFC coating prevented the aging of polymer film nanostructures and showed excellent durability in a high-temperature and high-humidity environment. It exhibited excellent flexibility to maintain the superhydrophobic surface, even at a mechanical bending radius of 1 mm, and could retain its properties even after repeated bending for 10,000 times.

scholarly journals Carbon Dots as Sensing Layer for Printed Humidity and Temperature Sensors

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2446
Author(s):  
Almudena Rivadeneyra ◽  
José F. Salmeron ◽  
Fabio Murru ◽  
Alejandro Lapresta-Fernández ◽  
Noel Rodríguez ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Internet Of Things ◽  
Polyethylene Terephthalate ◽  
Carbon Dots ◽  
Temperature Sensors ◽  
Capacitive Sensors ◽  
Exciting Frequency ◽  
Sensor Structure ◽  
Pet Film

This work presents an innovative application of carbon dots (Cdots) nanoparticles as sensing layer for relative humidity detection. The developed sensor is based on interdigitated capacitive electrodes screen printed on a flexible transparent polyethylene terephthalate (PET) film. Cdots are deposited on top of these electrodes. An exhaustive characterization of the nanoparticles has been conducted along with the fabrication of the sensor structure. The accompanied experiments give all the sensibility to the Cdots, showing its dependence with temperature and exciting frequency. To the best of our knowledge, this work paves the path to the use of these kind of nanoparticles in printed flexible capacitive sensors aimed to be employed in the continuously expanding Internet of Things ecosystem.

Fabrication of 100nm Sized Patterns on Flexible Polyethylene-Terephthalate Substrate Using Monomer Based Thermal Curing Nanoimprint Lithography

2007 ◽  
Vol 121-123 ◽  
pp. 657-660
Author(s):  
Heon Lee ◽  
Ki Yeon Yang ◽  
Sung Hoon Hong
Keyword(s):  
Polymer Film ◽  
Polyethylene Terephthalate ◽  
Nanoimprint Lithography ◽  
Potential Interaction ◽  
Polymerization Temperature ◽  
Glass Temperature ◽  
Thermal Curing ◽  
Pet Film ◽  
Polyethylene Terephthalate Substrate ◽  
Film Substrate

In order to build a nano-device on polymer substrate, nano-size patterning must be done. However, conventional photolithography cannot be used to fabricate nano-sized patterns on polymer film due to the flexibility of polymer film and its potential interaction with developer solution and organic solvent. In this study, 100nm sized dense line and space patterns were made on flexible PET (polyethylene-terephthalate) substrate using newly developed monomer based imprinting lithography. Compared to hot embossing lithography, thermal curing imprint lithography uses monomer based imprint resin which consists of base monomer and thermal initiator. Since it is liquid phase and polymerization temperature is much lower than glass temperature of polymer, the nano-sized patterns can be transfer at much lower temperature and pressure. Hence, patterns as small as 100nm were successfully fabricated on flexible PET film substrate by monomer based thermal curing imprinting lithography at 85°C and 5atm.

scholarly journals Ion Charge Influence on the Molecular Structure of Polyethylene Terephthalate Films after Irradiation with Swift Heavy Ions

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 479
Author(s):  
Adil Z. Tuleushev ◽  
Maxim V. Zdorovets ◽  
Artem L. Kozlovskiy ◽  
Fiona E. Harrison
Keyword(s):  
Polyethylene Terephthalate ◽  
Structural Changes ◽  
Diffraction Method ◽  
Dipole Interaction ◽  
Heavy Ion ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
Chain Molecules ◽  
Repeat Units ◽  
Pet Film

We report here experimental results investigating the influence of the initial swift heavy ion charge on the structure of polyethylene terephthalate (PET) film after irradiation, using a structurally sensitive X-ray diffraction method. Kr ions with an energy of 100 MeV and charges of 13+, 14+, and 15+ were each used at irradiation fluences of 5 × 1010, 7.5 × 1010, 1 × 1011, 2.5 × 1011 and 5 × 1011 ions/cm2. At constant energy and irradiation fluence, the post-irradiation structural changes in PET film show a clear dependence on the initial ion charge. As either the fluence or ion charge increase, the latent tracks begin to overlap, leading to cross-linking of PET chain molecules to form rotational isomers (rotamers). We use the fluence corresponding to the onset of overlapping to estimate the size of latent tracks for different ion charges. At the highest fluences, the latent tracks become entirely overlapped, and the interchain cross-linking extends throughout the whole film. Since this cross-linking is due to the dipole–dipole interaction of subunits of repeat units of PET chain molecules, it is reversible, in contrast to the well-known chemical cross-linking of polymer chain molecules under irradiation.

scholarly journals Possibility of Fabricating Anisotropic Conductive Film with a Line-and-Space-Like Pattern by Stick-Slip Accompanying Abrasion

2019 ◽  
Vol 3 (3) ◽  
pp. 60
Author(s):  
Keishi Naito ◽  
Yuji Kataoka ◽  
Kisaragi Yashiro
Keyword(s):  
Polyethylene Terephthalate ◽  
Contact Force ◽  
Periodic Structures ◽  
Metal Layer ◽  
Film Surface ◽  
Anisotropic Conductive Film ◽  
Stick Slip ◽  
Direction Parallel ◽  
Conductive Film ◽  
Pet Film

The development of an anisotropic conductive film was attempted using original microfabrication (stick-slip (SS) processing) involving SS accompanying abrasion. During SS processing, the film surface was periodically scraped with a razor. For a metal-deposited polyethylene terephthalate (PET) film (metal/PET film), fine periodic structures (line and space (L/S)-like patterns) were formed on its surface because the metal layer was periodically scraped. This result proved that SS processing can be applied not only to polymers but also to metals. Moreover, the line interval of an SS-processed metal/PET film shortened as the contact force decreased, and the depth of the line became shallower in proportion to the line interval. In addition, SS-processed copper/PET (Cu/PET) film did not conduct electricity in the direction perpendicular to the Cu line; however, it conducted electricity in the direction parallel. Thus, this study shows the possibility of using SS processing for fabricating an anisotropic conductive film.

Plasma Hydrophilization of Superhydrophobic Surface and Its Aging Behavior: The Effect of Micro/nanostructured Surface

2016 ◽  
Vol 48 (6) ◽  
pp. 368-372 ◽  
Author(s):  
Faze Chen ◽  
Wenji Xu ◽  
Shuai Huang ◽  
Jiyu Liu ◽  
Jinlong Song ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Nanostructured Surface ◽  
Aging Behavior

Droplets Jumping from a Hybrid Superhydrophilic and Superhydrophobic Surface

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
Hai Wang ◽  
Quang Nguyen ◽  
Jae W. Kwon ◽  
Jing Wang ◽  
Hongbin Ma
Keyword(s):  
Contact Angle ◽  
Copper Substrate ◽  
Copper Surface ◽  
Film Condensation ◽  
Condensation Process ◽  
Nanostructured Surface ◽  
Additional Energy ◽  
Ammonium Persulphate ◽  
Condition Effect ◽  
Superhydrophilic Surface

The wetting condition effect of the condensation process on a hybrid superhydrophobic and superhydrophilic copper surface as shown in Fig. 1a was experimentally investigated. The superhydrophilic surface (Fig. 1b) consists of micro-flowers (CuO) and nanorods (Cu(OH)2) obtained by immersing the copper substrate into alkaline solution of 2.5 M sodium hydroxide and 0.1 M ammonium persulphate, and the superhydrophobic nanostructured surface (Fig. 1c) was formed by spin coating the Cytop on the hierarchically structured CuO / Cu(OH)2 surface. Experimental results show that the film condensation started on the superhydrophilic region while the dropwise condensation of tiny droplets with an average contact angle of 160° were formed on the superhydrophobic region. Because the film condensation was confined within the superhydrophilic region of 1 mm x 1 mm, the contact angle of this droplet became larger and larger. When a tiny droplet developed on the superhydrophobic area joins with the big droplet formed on the superhydrophilic surface (square region), the coalesced droplet obtains additional energy and jumps off from the condensing surface.

Effect of γ-irradiation on latent tracks of polyethylene terephthalate (PET) film

2005 ◽  
Vol 406 (1-3) ◽  
pp. 188-191 ◽  
Author(s):  
A. Hiroki ◽  
M. Asano ◽  
T. Yamaki ◽  
M. Yoshida
Keyword(s):  
Polyethylene Terephthalate ◽  
Γ Irradiation ◽  
Pet Film

COLORATION OF POLYETHYLENE TEREPHTHALATE (PET) FILM BY 3MeV PROTON BEAMS

2001 ◽  
Vol 11 (03n04) ◽  
pp. 93-101 ◽  
Author(s):  
S. Matsuyama ◽  
K. Ishii ◽  
H. Yamazaki ◽  
H. Endoh ◽  
H. Yuki ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Color Centers ◽  
Sequential Process ◽  
Proton Beams ◽  
Spin Resonance ◽  
Ft Ir ◽  
Absorbance Changes ◽  
Pet Film ◽  
Pet Films ◽  
Ft Ir Spectroscopy

Coloration of polyethylene terephthalate (PET) films by using 3 MeV proton beams was studied by means of absorption spectroscopy, electron spin resonance (ESR) spectroscopy and Fourier transform infrared absorption (FT-IR) spectroscopy. Absorbance of the films increased with the dose and faded in time. Absorbance changes are caused by formation of color centers. The color centers had three components: permanent, long-lived and short-lived. Long-lived and short-lived color centers were formed by reactive species such as radicals. Annealing of color center is well explained by a proposed sequential process.

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