Introducing Amine Functionalities on a Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Surface:  Comparing the Use of Ammonia Plasma Treatment and Ethylenediamine Aminolysis

2006 ◽  
Vol 7 (2) ◽  
pp. 427-434 ◽  
Author(s):  
Imelda Keen ◽  
Poonam Broota ◽  
Llewellyn Rintoul ◽  
Peter Fredericks ◽  
Matt Trau ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Ammonia Plasma

A comparative study of the electrorheological properties of various N-doped nanomaterials using ammonia plasma treatment

2016 ◽  
Vol 52 (26) ◽  
pp. 4808-4811 ◽  
Author(s):  
Chang-Min Yoon ◽  
Gyeongseop Lee ◽  
Jungchul Noh ◽  
Choonghyeon Lee ◽  
Oug Jae Cheong ◽  
...  
Keyword(s):  
Comparative Study ◽  
Plasma Treatment ◽  
Ammonia Plasma ◽  
Doped Nanomaterials ◽  
Electrorheological Properties

Nanomaterials with different morphologies, sizes, and compositions are successfully treated by ammonia plasma to exhibit significantly enhanced electrorheological (ER) performance.

Surface modification of aramid fibers via ammonia-plasma treatment

2013 ◽  
Vol 131 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Shuang Li ◽  
Keqing Han ◽  
Huaiping Rong ◽  
Xuanzhe Li ◽  
Muhuo Yu
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Aramid Fibers ◽  
Ammonia Plasma

scholarly journals High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0257777
Author(s):  
Anuja Tripathi ◽  
Kenneth D. Harris ◽  
Anastasia L. Elias
Keyword(s):  
Catalytic Activity ◽  
Plasma Treatment ◽  
Surface Composition ◽  
Point Of Care ◽  
High Surface ◽  
Effective Means ◽  
High Surface Area ◽  
Catalytic Performance ◽  
Optimal Time ◽  
Ammonia Plasma

Nitrogen-functionalization is an effective means of improving the catalytic performances of nanozymes. In the present work, plasma-assisted nitrogen modification of nanocolumnar Ni GLAD films was performed using an ammonia plasma, resulting in an improvement in the peroxidase-like catalytic performance of the porous, nanostructured Ni films. The plasma-treated nanozymes were characterized by TEM, SEM, XRD, and XPS, revealing a nitrogen-rich surface composition. Increased surface wettability was observed after ammonia plasma treatment, and the resulting nitrogen-functionalized Ni GLAD films presented dramatically enhanced peroxidase-like catalytic activity. The optimal time for plasma treatment was determined to be 120 s; when used to catalyze the oxidation of the colorimetric substrate TMB in the presence of H2O2, Ni films subjected to 120 s of plasma treatment yielded a much higher maximum reaction velocity (3.7⊆10−8 M/s vs. 2.3⊆10−8 M/s) and lower Michaelis-Menten coefficient (0.17 mM vs. 0.23 mM) than pristine Ni films with the same morphology. Additionally, we demonstrate the application of the nanozyme in a gravity-driven, continuous catalytic reaction device. Such a controllable plasma treatment strategy may open a new door toward surface-functionalized nanozymes with improved catalytic performance and potential applications in flow-driven point-of-care devices.

Ammonia Plasma Treatment of Viscose Wound Dressings

2015 ◽  
pp. 225-242
Author(s):  
N. Gokarneshan ◽  
D. Anitha Rachel ◽  
V. Rajendran ◽  
B. Lavanya ◽  
Arundhathi Ghoshal
Keyword(s):  
Plasma Treatment ◽  
Wound Dressings ◽  
Ammonia Plasma

Modification of polysulfone membranes 4. Ammonia plasma treatment

2002 ◽  
Vol 38 (4) ◽  
pp. 717-726 ◽  
Author(s):  
Marek Bryjak ◽  
Irena Gancarz ◽  
Gryzelda Poźniak ◽  
Włodzimierz Tylus
Keyword(s):  
Plasma Treatment ◽  
Ammonia Plasma ◽  
Polysulfone Membranes

Ammonia plasma treatment of polystyrene surfaces enhances proliferation of primary human mesenchymal stem cells and human endothelial cells

2012 ◽  
Vol 8 (3) ◽  
pp. 327-337 ◽  
Author(s):  
Claudia Kleinhans ◽  
Jakob Barz ◽  
Simone Wurster ◽  
Marleen Willig ◽  
Christian Oehr ◽  
...  
Keyword(s):  
Stem Cells ◽  
Endothelial Cells ◽  
Mesenchymal Stem Cells ◽  
Plasma Treatment ◽  
Human Mesenchymal Stem Cells ◽  
Human Endothelial Cells ◽  
Ammonia Plasma

Surface Modification of Fluorosilicone Acrylate RGP Contact Lens by Low-Temperature Ammonia Plasma

2009 ◽  
Vol 610-613 ◽  
pp. 1273-1277 ◽  
Author(s):  
Li Ren ◽  
Lian Na Zhao ◽  
Shi Heng Yin ◽  
Ying Jun Wang ◽  
Hao Chen ◽  
...  
Keyword(s):  
Contact Angle ◽  
Low Temperature ◽  
Plasma Treatment ◽  
Contact Lens ◽  
Photoelectron Spectroscopy ◽  
Ammonia Plasma ◽  
Angle Measurements ◽  
Atomic Force ◽  
Contact Angle Measurements ◽  
Surface Contact Angle

In order to improve the surface hydrophilicity and the resistance to protein deposition of fluorosilicone acrylate RGP (rigid gas permeable) contact lens, low temperature ammonia plasma treatment was used to modify the lens surface. The changes of surface structures and properties were characterized by contact angle analyzer, X-ray photoelectron spectroscopy (XPS) and atomic force microscope (AFM). Effects of exposure time and plasma generating power on surface properties of the RGP contact lens were investigated. The surface contact angle measurements showed a great improvement of hydrophilicity after plasma treatment. XPS analysis indicated that the oxygen content and the nitrogen content increased remarkably after ammonia plasma treatment. Furthermore, the content of the hydrophilic group O-C=O/N-C=O on the surface increased and the content of the hydrophobic group CF2 decreased after plasma treatment. AFM results showed that ammonia plasma could lead to surface etching.

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