Factors Affecting the Assembly of Carbon Nanostructures With Cells and Enzymes

2010 ◽  
Author(s):  
Sonal Mazumder ◽  
Suvojit Ghosh ◽  
Joseph O. Falkinham ◽  
Ishwar K. Puri
Keyword(s):  
Contact Angle ◽  
Stainless Steel ◽  
High Resolution ◽  
Surface Morphology ◽  
Carbon Nanostructures ◽  
Silicon Wafers ◽  
Flame Synthesis ◽  
Bacterial Cells ◽  
Factors Affecting ◽  
Nonpremixed Flame

Carbon nanostructures were synthesized and deposited through flame synthesis on stainless steel grids and foils, and on bare and ferrofluid-painted silicon wafers at different nonpremixed flame locations to produce hydrophobic surfaces. The hydrophobicity is characterized through the contact angle for water droplets placed on the surface. The surface morphology of the nanoparticles is obtained from high-resolution FESEM images. Following synthesis and deposition the adherence, activity, and stability of bacterial cells, antibodies, and enzymes on the carbon nanostructures can be studied.

Synthesis of Superhydrophobic Carbon Surface during Combustion Propane

2011 ◽  
Vol 14 (1) ◽  
pp. 19 ◽  
Author(s):  
Z.A. Mansurov ◽  
M. Nazhipkyzy ◽  
B.T. Lesbayev ◽  
N.G. Prikhodko ◽  
M. Auyelkhankyzy ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Morphology ◽  
Carbon Nanostructures ◽  
Carbon Surface ◽  
Flame Synthesis ◽  
Water Droplets ◽  
Sem Images ◽  
Surface Carbon ◽  
Nanostructured Surfaces ◽  
Nonpremixed Flame

We synthesize and deposit carbon nanostructures through flame synthesis on silicon and nickel wafers at different nonpremixed flame locations to produce hydrophobic surfaces. The hydrophobicity is characterized through the contact angle for water droplets placed on the surface. The surface morphology of the nanoparticles is obtained from SEM images. The morphology and hydrohobicity of the nanostructured surfaces depends upon the deposition, which differs at various flame locations. We determine the optimum flame location for the synthesis and deposition of surface carbon nanostructures that lead to maximum hydrophobicity.

How Do the Local Conditions Influence the Flame Synthesis of Carbon Nanostructures?

2004 ◽  
Author(s):  
Claudya P. Arana ◽  
Ishwar K. Puri ◽  
Swarnendu Sen
Keyword(s):  
Stainless Steel ◽  
Transition Metal ◽  
Gas Phase ◽  
Carbon Nanostructures ◽  
Flame Synthesis ◽  
Carbon Nanostructure ◽  
Local Conditions ◽  
The Third ◽  
Nonpremixed Flame ◽  
Walled Cnts

Since prepared substrates offer an appropriate method for the selective production of uniform arrays of aligned CNTs and CNFs, it is important to illustrate the influence of different catalysts on the resulting nanostructures. This investigation characterizes the activity of three catalysts — iron in alloyed form as stainless steel, nickel, and platinum — on carbon nanostructure formation under identical conditions in an ethylene/air nonpremixed flame. We have synthesized well-aligned multi-walled CNTs (on Ni) and CNFs (on stainless steel). The third transition metal Pt produces CNF structures of a different kind and its activity has not been previously characterized in flames. The catalyst and gas-phase conditions leading to the formation of these different structures are discussed.

Flame synthesis of carbon nanostructures on stainless steel anodes for use in microbial fuel cells

2011 ◽  
Vol 196 (14) ◽  
pp. 5829-5834 ◽  
Author(s):  
Jennifer L. Lamp ◽  
Jeremy S. Guest ◽  
Sayangdev Naha ◽  
Katherine A. Radavich ◽  
Nancy G. Love ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Carbon Nanostructures ◽  
Flame Synthesis

Coatings with carbon nanostructures with hydrophobic properties made by anodizing and the CVD method on stainless steel

2018 ◽  
Vol 23 (2) ◽  
pp. 30-37
Author(s):  
Zofia Buczko ◽  
Klaudia Olkowicz ◽  
Piotr Tomassi ◽  
Tadeusz Żółciak
Keyword(s):  
Contact Angle ◽  
Stainless Steel ◽  
Raman Spectra ◽  
Anodic Oxidation ◽  
Carbon Nanostructures ◽  
Hydrophobic Properties ◽  
Carbon Coatings ◽  
Cvd Method ◽  
Carbon Structures ◽  
Graphene Structures

The method of anodic oxidation of stainless steel and the subsequent deposition of carbon layers in the CVD processes resulted in obtaining the coatings with hydrophobic and superhydrophobic properties. The parameters of the CVD process were modified and various carbon structures, including graphene type ones, were obtained. The coatings were characterised by Raman spectra and SEM microscopy. The wettability of the surface was evaluated by investigating a contact angle. The samples containing carbon coatings showed hydrophobic properties, and those containing graphene structures were characterized by the contact angle greater than 150°, which means superhydrophobic properties.

High Resolution Displacement of Functional Groups onto Fluorocarbon Resin Surface by Using ArF Excimer Laser

1996 ◽  
Vol 451 ◽  
Author(s):  
T. Shimizu ◽  
M. Murahara
Keyword(s):  
Contact Angle ◽  
High Resolution ◽  
Laser Beam ◽  
Thin Layer ◽  
Functional Groups ◽  
Excimer Laser ◽  
Laser Fluence ◽  
Large Area ◽  
Three Solutions ◽  
Arf Excimer Laser

ABSTRACTA Fluorocarbon resin surface was selectively modified by irradiation with a ArF laser beam through a thin layer of NaAlO2, B(OH)3, or H2O solution to give a hydrophilic property. As a result, with low fluence, the surface was most effectively modified with the NaAlO2 solution among the three solutions. However, the contact angle in this case changed by 10 degrees as the fluence changed only 1mJ/cm2. When modifying a large area of the surface, high resolution displacement could not be achieved because the laser beam was not uniform in displacing functional groups. Thus, the laser fluence was successfully made uniform by homogenizing the laser beam; the functional groups were replaced on the fluorocarbon resin surface with high resolution, which was successfully modified to be hydrophilic by distributing the laser fluence uniformly.

scholarly journals Biologics Formulation Factors Affecting Metal Leachables from Stainless Steel

2011 ◽  
Vol 12 (1) ◽  
pp. 411-421 ◽  
Author(s):  
Shuxia Zhou ◽  
Christian Schöneich ◽  
Satish K. Singh
Keyword(s):  
Stainless Steel ◽  
Factors Affecting ◽  
Formulation Factors

scholarly journals Effects of bracket design on critical contact angle

2013 ◽  
Vol 83 (5) ◽  
pp. 877-884 ◽  
Author(s):  
Xiaomo Liu ◽  
Peng Ding ◽  
Jiuxiang Lin
Keyword(s):  
Contact Angle ◽  
Stainless Steel ◽  
Linear Regression ◽  
Resistance To Sliding ◽  
The Relationship ◽  
State Resistance ◽  
Critical Contact ◽  
Bracket Design

ABSTRACT Objective: To explore how the position of the bracket slots relative to the archwire influences the friction between them, and how bracket design affects the critical contact angle (θc). Materials and Methods: Two kinds of stainless steel archwires (0.016 and 0.019 × 0.025-inch) were tested against four kinds of brackets (Transmission Straight Archwire bracket, Domestic MBT bracket, Tip-Edge Plus bracket, and BioQuick self-ligation bracket) in the dry state. Resistance to sliding (RS) was measured as an increase in contact angle (θ). The value of θc was calculated by two linear regression lines. Results: Friction remained stable when θ < θc, then increased linearly when θ > θc. The θc values of the Tip-Edge Plus bracket and Transmission Straight Archwire bracket were significantly larger than those for the Domestic MBT bracket and BioQuick self-ligation bracket. Conclusions: The relationship between the archwire and bracket slot significantly affects the resistance to sliding. The “edge-off” structure of the Tip-Edge Plus bracket and Transmission Straight Archwire bracket could help to increase the θc value, and to expand the passive configuration range.

Preparation and the Blood Compatibility of Titanium Oxide Nanorod Arrays

2011 ◽  
Vol 306-307 ◽  
pp. 25-30 ◽  
Author(s):  
Ping Luo ◽  
Zhan Yun Huang ◽  
Di Hu Chen
Keyword(s):  
Contact Angle ◽  
Surface Morphology ◽  
Titanium Oxide ◽  
Tin Oxide ◽  
Growth Parameters ◽  
Blood Compatibility ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Nanorod Arrays ◽  
Wetting Properties

In this work, titanium oxide nanorod arrays were fabricated by using the hydrothermal method on fluorine-doped tin oxide (FTO) coated glass. The diameter of the nanorods could be controlled from 150 nm to 30 nm by changing the growth parameters. The surface morphology and the structure of the samples were characterized by SEM and XRD. The wetting properties were identified by contact angle measurement. Platelet attachment was investigated to evaluate the blood compatibility of the samples with different nanoscale topographies. Results show that the nanotopographical surfaces perform outstanding blood compatibility, and the adhering platelet decreased with the increasing diameter of the nanorods.

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