Effect of Polymer Substrates on Nano Scale Hot Embossing

2003 ◽  
Vol 782 ◽  
Author(s):  
Jin-Hyung Lee ◽  
Hyun-Woo Lim ◽  
Jin-Goo Park ◽  
Eun-Kyu Lee ◽  
Yangsun Kim
Keyword(s):  
Surface Energy ◽  
Surface Properties ◽  
Process Development ◽  
Adhesion Force ◽  
Polymer Surface ◽  
Hot Embossing ◽  
Surface Characteristic ◽  
Direct Writing ◽  
Polymer Substrates ◽  
Nano Size

ABSTRACTHot embossing has been widely accepted as an alternative to photolithography in generating patterns on polymer substrates. The optimization of embossing process should be accomplished based on polymer surface properties. Therefore, in this paper, polymers with different surface characteristic were selected and the surface properties of each polymers such as surface energy and adhesion force were investigated by contact angle and AFM. Based on these results, the imprinted nano patterns were compared. Silicon molds with nano size patterns were fabricated by e-beam direct writing. Molds were coated with self-assembled monolayer (SAM) of (1, 1, 2, 2H –perfluorooctyl)-trichlorosilane to reduce the stiction between molds and polymer substrates. For embossing, pressure of 500 psi, embossing time of 5 min and temperature of above transition temperature were applied. Mr-I 8010 polymer (Micro Resist Technology), Polymethylmethacrylate (PMMA 495k) and LOR (polyaliphatic imide copolymer) were used as substrate for hot embossing process development in nano size. These polymers were spun coated on the Si wafer with the thickness of 150 nm. The nano size patterns obtained by hot embossing were identified by atomic force microscopy without breaking the pattern and compared based on the polymer surface properties. The mr-I 8010 which has the lowest surface energy and adhesion force shows the best demolding property.

Dual Regime Spray Deposition Based Laser Direct Writing of Metal Patterns on Polymer Substrates

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Semih Akin ◽  
Ted Gabor ◽  
Seunghwan Jo ◽  
Hangeun Joe ◽  
Jung-Ting Tsai ◽  
...  
Keyword(s):  
Spray Deposition ◽  
Polymer Surface ◽  
Surface Preparation ◽  
Dip Coating ◽  
Polymer Materials ◽  
Activation Process ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Polymer Substrates ◽  
Metallization Of Polymers

Abstract In recent years, the metallization of polymers has been intensely studied as it takes advantage of both plastics and metals. Laser direct writing (LDW) is one of the most widely used technologies to obtain metal patterns on polymer substrates. In LDW technology, different methods including injection-molding, drop-casting, dip coating, and spin coating are utilized for surface preparation of polymer materials prior to the laser activation process. In this study, an atomization based dual regime spray coating system is introduced as a novel method to prepare the surface of the materials for LDW of metal patterns. Copper micropatterns on the polymer surface were achieved with a minimum feature size of 30 μm, having a strong adhesion and excellent conductivity. The results show that the dual regime spray deposition system can be potentially used to obtain uniform thin film coating with relatively less material consumption on the substrates for surface preparation of laser direct metallization of polymers.

scholarly journals Correlation between Surface Energy and Adhesion Force of Polyethylene/Paperboard: A Predictive Tool for Quality Control in Laminated Packaging

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Danielle M. F. Madeira ◽  
Osvaldo Vieira ◽  
Luís Antonio Pinheiro ◽  
Benjamim de Melo Carvalho
Keyword(s):  
Quality Control ◽  
Surface Energy ◽  
Adhesion Force ◽  
Paper Industry ◽  
Peel Test ◽  
Practical Method ◽  
Test Method ◽  
Predictive Tool ◽  
Contact Angle Analysis ◽  
Poor Adhesion

Poor adhesion continues to be a problem for manufacturers of laminated packaging. Therefore, the aim of this research was to study the effect of flame treatment, the type of coating, and starch application on the adhesion force of polyethylene/paperboard. The force of adhesion was determined using the peel test method; the paper surface energy was assessed by contact angle analysis; and paperboard roughness was determined by profilometer. The flame treatment did not affect the surface roughness but significantly increased the paperboard surface energy. The paperboard coated with polar latex showed much higher surface energy than the paperboard coated with nonpolar latex. The adhesion force of polyethylene presented a linear correlation to the surface energy of the paperboard. Therefore, the surface energy of paperboard is an excellent indication of its adhesion force to polyethylene, and this represents a very reliable and practical method in terms of quality control in the paper industry for producing laminated packages.

scholarly journals Adhesion of Individual Attachment Setae of the Spider Cupiennius salei to Substrates With Different Roughness and Surface Energy

2021 ◽  
Vol 7 ◽  
Author(s):  
Bastian Poerschke ◽  
Stanislav N. Gorb ◽  
Clemens F. Schaber
Keyword(s):  
Surface Energy ◽  
Glass Substrate ◽  
Adhesion Force ◽  
Adhesive System ◽  
Adhesive Contact ◽  
Contact Angles ◽  
Individual Variability ◽  
Van Der Waals Interactions ◽  
Smooth Surfaces ◽  
Cupiennius Salei

Dynamic adhesion is a key ability for animals to climb smooth surfaces. Spiders evolved, convergent to geckos, a dry adhesive system made of setae branching into smaller microtrichia ending as spatulae. Several previous studies concentrated either on the whole adhesive claw tuft on the spider´s foot that consists of attachment setae or on the single adhesive contact elements, the microtrichia with spatula-shaped tips. Here, the adhesion of single setae of the spider Cupiennius salei was examined and the morphology of the pretarsus and the fine structure of the setae were studied in further detail. Using individual setae fixed to force sensing cantilevers, their adhesion at different contact angles with a glass substrate was measured as well as their adhesive performance on substrates with different roughness and on smooth surfaces with different surface energies. The results show an individual variability of the adhesive forces corresponding to the seta morphology and especially to the seta tip shape. The tip shapes of the setae vary largely even in neighboring setae of the pretarsal claw tuft that comprises approximately 2,400 setae. Regarding surface energy of the substrate, the adhesion force on hydrophobic polytetrafluoroethylene was 30% of that on a hydrophilic glass substrate, which points to the importance of both van der Waals interactions and hydrogen bonds in spider adhesion.

Sono-Assisted Surface Energy Driven Assembly of 2D Materials on Flexible Polymer Substrates: A Green Assembly Method Using Water

2019 ◽  
Vol 11 (36) ◽  
pp. 33458-33464 ◽  
Author(s):  
Dong Zhou ◽  
Ji Hao ◽  
Andy Clark ◽  
Kyunghoon Kim ◽  
Long Zhu ◽  
...  
Keyword(s):  
Surface Energy ◽  
2D Materials ◽  
Polymer Substrates ◽  
Flexible Polymer ◽  
Assembly Method

scholarly journals Effects of Surface Energy Reducing Agents on Adhesion Force in Liquid Bridge Microstereolithography

2020 ◽  
Vol 36 ◽  
pp. 101522
Author(s):  
Aslan Alamdari ◽  
Jeongwoo Lee ◽  
Myoeum Kim ◽  
Md. Omar Faruk Emon ◽  
Ali Dhinojwala ◽  
...  
Keyword(s):  
Surface Energy ◽  
Liquid Bridge ◽  
Adhesion Force ◽  
Reducing Agents

Crystallographic anisotropy in surface properties of brass and its dependence on the electron work function

2018 ◽  
Vol 51 (6) ◽  
pp. 1715-1720 ◽  
Author(s):  
Liqiu Guo ◽  
Hao Lu ◽  
D. Y. Li ◽  
Q. X. Huang ◽  
Xu Wang ◽  
...  
Keyword(s):  
Surface Energy ◽  
Work Function ◽  
Surface Properties ◽  
Electron Work Function ◽  
Adhesive Force ◽  
Surface Electron ◽  
Crystallographic Anisotropy ◽  
Atomic Force ◽  
Work Functions ◽  
Crystallographic Planes

The crystallographic anisotropy of the electric current or conductance, adhesive force, elastic modulus, and deformation magnitude of alpha brass were investigated through property mapping using an atomic force microscope. Surface electron work functions of differently oriented grains in the brass were also analyzed using atomic force microscopy. The mapped surface properties are closely related to the electron work function; the work function reflects the surface activity, which is itself dependent on the surface energy. The anisotropy of the properties is closely correlated to the in situ measured surface electron work function. It is demonstrated that crystallographic planes with higher electron work functions exhibit lower current, smaller adhesive forces, larger elastic moduli and smaller deformation magnitudes. Efforts are made to understand the relationships by connecting the properties with surface energy and electron work function. The dependence of the properties on crystallographic orientation can be elucidated by considering the surface electron behavior using electron work function as a novel probing parameter.

scholarly journals Recruiting physisorbed water in surface polymerization for bio-inspired materials of tunable hydrophobicity

2016 ◽  
Vol 4 (38) ◽  
pp. 14729-14738 ◽  
Author(s):  
S. Oyola-Reynoso ◽  
I. D. Tevis ◽  
J. Chen ◽  
B. S. Chang ◽  
S. Çinar ◽  
...  
Keyword(s):  
Surface Energy ◽  
Surface Properties ◽  
Surface Polymerization ◽  
Physisorbed Water ◽  
Chemical Grafting ◽  
Properties Of Materials

Chemical grafting has been widely used to modify the surface properties of materials, especially surface energy for controlled wetting, because of the resilience of such coatings/modifications.

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