Gold Nanolayers Prepared on Poly(ethyleneterephtalate)

Ablation, water etching and gold coating were studied on poly(ethyleneterephtalate) (PET) exposed to DC Ar plasma for 240 s at 8.3 W power. Au layers were sputtered on pristine and modified PET and their adhesion and topography were investigated. The roughness and changes of topography after plasma treatment, subsequent water etching and gold coating were followed using AFM microscopy. The thicknesses of ablated layer and water dissolved layer were determined using gravimetry. A nanoindentor was used to perform microstratch tests of sputtered layers. Water dissolving of thin layer after plasma treatment was confirmed by FTIR spectroscopy. We have found that under the present experimental conditions ca 30 nm thick layer of PET is plasma ablated. The surface topography changes dramatically and surface roughness increases. Another ca 16 nm thick layer was removed under present laboratory conditions after 24hour water etching. Subsequent coating with 50 nm thick gold layer increases surface roughness in all cases of surface modification.

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Surface Modification of a-C:H(N) Thin Films by Plasma Treatment

Microscopy and Microanalysis ◽

10.1017/s1431927605051147 ◽

2005 ◽

Vol 11 (S03) ◽

pp. 162-165 ◽

Cited By ~ 2

Author(s):

L. von Mühlen ◽

R. A. Simao ◽

C. A. Achete

Keyword(s):

Thin Films ◽

Surface Roughness ◽

Optical Properties ◽

Surface Modification ◽

Surface Chemistry ◽

Plasma Treatment ◽

Surface Properties ◽

Functional Groups ◽

Material Properties ◽

Modify Surface

Surface chemistry and topography of materials are generally preponderant factors in a series of material properties, such as adhesion, wettability, friction and optical properties [1]. Wettability of films, for example, can be altered significantly by modifying its surface roughness and also by incorporating functional groups. Plasma treatment is a powerful and versatile way to modify surface properties of amorphous nitrogen-incorporated carbon thin films (a-C:H(N)) and obtain materials with improved properties, once it is possible to modify the surfaces in a controlled way by specific settings of plasma conditions. [2 - 4]

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Argon and Argon–Oxygen Plasma Surface Modification of Gelatin Nanofibers for Tissue Engineering Applications

Membranes ◽

10.3390/membranes11010031 ◽

2021 ◽

Vol 11 (1) ◽

pp. 31

Author(s):

Abolfazl Mozaffari ◽

Mazeyar Parvinzadeh Gashti ◽

Mohammad Mirjalili ◽

Masoud Parsania

Keyword(s):

Tissue Engineering ◽

Surface Modification ◽

Plasma Treatment ◽

Ftir Spectroscopy ◽

Oxygen Plasma ◽

Attenuated Total Reflection ◽

Oxygen Plasma Treatment ◽

Engineering Applications ◽

Plasma Surface Modification ◽

Plasma Surface

In the present study, we developed a novel approach for functionalization of gelatin nanofibers using the plasma method for tissue engineering applications. For this purpose, tannic acid-crosslinked gelatin nanofibers were fabricated with electrospinning, followed by treatment with argon and argon–oxygen plasmas in a vacuum chamber. Samples were evaluated by using scanning electron microscopy (SEM), atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, contact angle (CA) and X-ray diffraction (XRD). The biological activity of plasma treated gelatin nanofibers were further investigated by using fibroblasts as cell models. SEM studies showed that the average diameter and the surface morphology of nanofibers did not change after plasma treatment. However, the mean surface roughness (RMS) of samples were increased due to plasma activation. ATR-FTIR spectroscopy demonstrated several new bands on plasma treated fibers related to the plasma ionization of nanofibers. The CA test results stated that the surface of nanofibers became completely hydrophilic after argon–oxygen plasma treatment. Finally, increasing the polarity of crosslinked gelatin after plasma treatment resulted in an increase of the number of fibroblast cells. Overall, results expressed that our developed method could open new insights into the application of the plasma process for functionalization of biomedical scaffolds. Moreover, the cooperative interplay between gelatin biomaterials and argon/argon–oxygen plasmas discovered a key composition showing promising biocompatibility towards biological cells. Therefore, we strongly recommend plasma surface modification of nanofiber scaffolds as a pretreatment process for tissue engineering applications.

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Adhesion Improvement of Polyimide/PDMS Interface by Polyimide Surface Modification

MRS Advances ◽

10.1557/adv.2016.56 ◽

2016 ◽

Vol 1 (1) ◽

pp. 33-38 ◽

Cited By ~ 4

Author(s):

Shivani Joshi ◽

Antonie van Loon ◽

Angel Savov ◽

Ronald Dekker

Keyword(s):

Surface Modification ◽

Plasma Treatment ◽

Oxygen Plasma ◽

Thick Layer ◽

Silicon Wafers ◽

Oxygen Plasma Treatment ◽

Adhesion Promoters ◽

Peel Testing ◽

Surface Modification Techniques ◽

Shear Tester

ABSTRACTSilicon wafers coated with a 5μm thick layer of polyimide were treated with different surface modification techniques such as chemical adhesion promoters, oxygen plasma and an Ar+ sputter etch. After surface modification, the wafers were molded with a 1mm thick layer of PDMS. The adhesion of the PDMS was tested by peel testing and by using a Nordson DAGE wedge shear tester. It was found that commercially available chemical adhesion promoters and oxygen plasma treatment resulted in a very poor PI/PDMS adhesion, whereas the Ar+ sputter etch resulted in an adhesion so strong that the PDMS could not be delaminated from the PI surface without the failure of the material.

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Laser Surface Modification of Duplex Stainless Steel 2205 to Modify the Surface Roughness

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.18.2.2021.07.0663 ◽

2021 ◽

Vol 18 (2) ◽

Author(s):

Y. Arsyad ◽

R. Linggam ◽

MOINUDDIN MOHAMMED QUAZI ◽

M.H. Aiman ◽

M. Ishak ◽

...

Keyword(s):

Surface Roughness ◽

Stainless Steel ◽

Surface Modification ◽

Duplex Stainless Steel ◽

Surface Topography ◽

Laser Surface ◽

Polished Surface ◽

Average Roughness ◽

Laser Surface Modification ◽

2205 Duplex Stainless Steel

Laser surface modification is an emerging process that can produce texture on a work surface and effectively enhance surface topography while altering surface roughness. Laser surface modification is a sensitive process that depends on various laser processing parameters such as power, scanning speed, hatching distance. The significance of this work is to examine the influence of hatching distance on the surface characteristic of 2205 duplex stainless steel samples. The surface transformation and variation of the surface roughness properties of the materials were examined. The hatching distance was varied from 0.1 to 0.005 mm. Results indicate that, as the hatch spacing decreases, the overlap of laser track increases, thereby resulting in a decrease of surface roughness. Meanwhile, with the increase of hatch distance, the clear overlay tracks were transformed to irregular wavy surface. The best hatch distance parameter obtained was 100 μm that resulted in the highest roughness of 8.45 μm. Experimental results illustrate that, when the optimum hatch distance of 100 μm was adopted, the polished smooth surface of 2205 duplex stainless steel with initial average roughness value of 0.19 μm increased by 42 times of the polished surface roughness. A strong correlation between hatching distance and roughness was established in 2205 duplex stainless steel. High depth of the altered surface topography and increased roughness were linked to higher levels of hatching distance.

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Surface roughness and substrate induced symmetry-breaking: influence on the plasmonic properties of aluminum nanostructure arrays

Nanoscale ◽

10.1039/d0nr06305c ◽

2020 ◽

Author(s):

Feifei ZHANG ◽

Jérôme Plain ◽

Davy Gerard ◽

Jérôme Martin

Keyword(s):

Surface Roughness ◽

Optical Properties ◽

Symmetry Breaking ◽

Surface Topography ◽

Metallic Nanoparticles ◽

Far Field ◽

Al Nanoparticles ◽

Nanostructure Arrays

The surface topography is known to play an important role on the near- and far- field optical properties of metallic nanoparticles. In particular, aluminum (Al) nanoparticles are commonly fabricated through...

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Valence variation of phase-pure M1 MoVNbTe oxide by plasma treatment for improved catalytic performance in oxidative dehydrogenation of ethane

RSC Advances ◽

10.1039/c5ra16517b ◽

2015 ◽

Vol 5 (111) ◽

pp. 91295-91301 ◽

Cited By ~ 7

Author(s):

Xin Chen ◽

Qianli Yang ◽

Bozhao Chu ◽

Hang An ◽

Yi Cheng

Keyword(s):

Surface Modification ◽

Metal Oxide ◽

Plasma Treatment ◽

Oxidative Dehydrogenation ◽

Oxidation State ◽

Active Sites ◽

Oxygen Plasma ◽

Catalyst Surface ◽

Catalytic Performance ◽

Phase Pure

This work presents a new method of catalyst surface modification by using oxygen plasma to change the oxidation state of active sites in metal oxide catalysts.

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Submicron surface roughening of aliphatic polyamide 6,6 fabric through low temperature plasma and its effect on interfacial bonding in rubber composite

Journal of Industrial Textiles ◽

10.1177/1528083717720202 ◽

2017 ◽

Vol 47 (8) ◽

pp. 2029-2049 ◽

Cited By ~ 1

Author(s):

Siddhan Periyasamy ◽

Krishna Prasad G ◽

Raja ASM ◽

Prashant G Patil

Keyword(s):

Surface Roughness ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Plasma Treatment ◽

Treatment Time ◽

Surface Roughening ◽

Temperature Plasma ◽

Nylon 6,6 ◽

Rubber Composite ◽

Scanning Electron

The present study aims to produce submicron surface roughening of aliphatic polyamide 6,6 (nylon 6,6) fabric using dielectric barrier discharge-based atmospheric low temperature plasma for improving the adhesion bonding with rubber. The plasma treatment was done in the time ranging from 15 s to 300 s. Formation of surface roughness on the fabric due to plasma treatment and the associated chemical changes were studied through high-resolution scanning electron microscope, geometrical surface roughness by Kawabata evaluation system surface tester, contact angle measurements and Fourier transform infrared in Attenuated total reflectance mode. Scanning electron microscope micrographs revealed the presence of submicron roughness on the nylon 6,6 fibre surface with pores of around 100 nm (0.1 µm) for the optimum treatment time of 180 s above which the pore merging effect dominated resulting in the net low surface roughness. Geometrical roughness (SMD) results were also well in agreement with the scanning electron microscope results for the roughening and the optimum effect of the plasma treatment. The control and plasma treated nylon 6,6 samples were used as reinforcements for rubber composite. The peel strength of the rubber composite, which is a measure of interfacial bonding, increased to 150% as the maximum for the optimum plasma treatment time of 180 s. Intense rubber deposits over the 180 s plasma treated samples were observed while only a few deposits of rubber were observed on the control fabric when their interfaces were examined through scanning electron microscope after peeling test.

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