Influence of electric field on separation and orientation of carbon nanotubes in spray coated layers

Circuit World ◽  
2015 ◽  
Vol 41 (3) ◽  
pp. 107-111 ◽  
Author(s):  
Grzegorz Wroblewski ◽  
Marcin Słoma ◽  
Daniel Janczak ◽  
Malgorzata Jakubowska
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Carbon Nanomaterials ◽  
Spray Coating ◽  
Halogen Lamp ◽  
Scale Production ◽  
Transparent Electrodes ◽  
Content Type ◽  
Coating Technique ◽  
Dc Electric Field

Purpose – The aims of this paper are to investigate the influence of direct current (DC) electric field on separation and orientation of carbon nanotubes (CNTs) in spray-coated layers and apply this method to the fabrication of elastic and transparent electrodes. The orientation of CNTs in the form of paths in the direction of electrical conduction should increase the electrode conductivity without decreasing its optical transmission. Design/methodology/approach – Materials are deposited using vacuum-free, ultra-fine nozzle spray coating technique, easily applicable for large-scale production. After the deposition of carbon nanomaterials, nanoparticles are oriented in the electric field and initially cured with infrared halogen lamp to evaporate solvents and preserve orientation of the nanoparticles in the deposited layer. Afterwards, layers are cured in a chamber dryer to obtain desired properties. Nanoparticles orientation and carbon nanomaterials separation via DC electric field are analysed, and the optical and electrical properties of prepared electrodes are measured. Findings – Experiments described in this paper showed that DC electric field can be applied provide separation and orientation of CNTs and combined with spray coating technique, can be used as additional tool for tuning the conductivity of flexible and transparent electrodes by decreasing the sheet resistance about five times. Originality/value – The results showed that spray coating combined with electric field orientation is a promising solution of obtaining elastic and transparent electrodes with oriented carbon particles. According to the authors’ knowledge, none of the experiments was directed to obtain DC electric field-oriented transparent layers produced with the use of spray coating technique.

Transparent electrodes made with ultrasonic spray coating technique for flexible heaters

2017 ◽  
Author(s):  
G. Wroblewski ◽  
J. Krzemiński ◽  
D. Janczak ◽  
J. Sowiński ◽  
M. Jakubowska
Keyword(s):  
Spray Coating ◽  
Transparent Electrodes ◽  
Coating Technique ◽  
Ultrasonic Spray

scholarly journals Semiquantitative Performance and Mechanism Evaluation of Carbon Nanomaterials as Cathode Coatings for Microbial Fouling Reduction

2015 ◽  
Vol 81 (14) ◽  
pp. 4744-4755 ◽  
Author(s):  
Qiaoying Zhang ◽  
Joanne Nghiem ◽  
Gregory J. Silverberg ◽  
Chad D. Vecitis
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Peroxide ◽  
Electric Potential ◽  
Bacterial Adhesion ◽  
Electrode Potential ◽  
Carbon Nanomaterials ◽  
Bacterial Attachment ◽  
Total Density ◽  
Content Type ◽  
Hydrogen Peroxide Generation

ABSTRACTIn this study, we examine bacterial attachment and survival on a titanium (Ti) cathode coated with various carbon nanomaterials (CNM): pristine carbon nanotubes (CNT), oxidized carbon nanotubes (O-CNT), oxidized-annealed carbon nanotubes (OA-CNT), carbon black (CB), and reduced graphene oxide (rGO). The carbon nanomaterials were dispersed in an isopropyl alcohol-Nafion solution and were then used to dip-coat a Ti substrate.Pseudomonas fluorescenswas selected as the representative bacterium for environmental biofouling. Experiments in the absence of an electric potential indicate that increased nanoscale surface roughness and decreased hydrophobicity of the CNM coating decreased bacterial adhesion. The loss of bacterial viability on the noncharged CNM coatings ranged from 22% for CB to 67% for OA-CNT and was dependent on the CNM dimensions and surface chemistry. For electrochemical experiments, the total density and percentage of inactivation of the adherent bacteria were analyzed semiquantitatively as functions of electrode potential, current density, and hydrogen peroxide generation. Electrode potential and hydrogen peroxide generation were the dominant factors with regard to short-term (3-h) bacterial attachment and inactivation, respectively. Extended-time electrochemical experiments (12 h) indicated that in all cases, the density of total deposited bacteria increased almost linearly with time and that the rate of bacterial adhesion was decreased 8- to 10-fold when an electric potential was applied. In summary, this study provides a fundamental rationale for the selection of CNM as cathode coatings and electric potential to reduce microbial fouling.

scholarly journals Transparent Electrodes with Nanotubes and Graphene for Printed Optoelectronic Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Marcin Słoma ◽  
Grzegorz Wróblewski ◽  
Daniel Janczak ◽  
Małgorzata Jakubowska
Keyword(s):  
Aging Process ◽  
Carbon Nanomaterials ◽  
Accelerated Aging ◽  
Spray Coating ◽  
Negative Influence ◽  
General Purpose ◽  
Bending Test ◽  
Optical Parameters ◽  
Transparent Electrodes ◽  
Mechanical Bending

We report here on printed electroluminescent structures containing transparent electrodes made of carbon nanotubes and graphene nanoplatelets. Screen-printing and spray-coating techniques were employed. Electrodes and structures were examined towards optical parameters using spectrophotometer and irradiation meter. Electromechanical properties of transparent electrodes are exterminated with cyclical bending test. Accelerated aging process was conducted according to EN 62137 standard for reliability tests of electronics. We observed significant negative influence of mechanical bending on sheet resistivity of ITO, while resistivity of nanotube and graphene based electrodes remained stable. Aging process has also negative influence on ITO based structures resulting in delamination of printed layers, while those based on carbon nanomaterials remained intact. We observe negligible changes in irradiation for structures with carbon nanotube electrodes after accelerated aging process. Such materials demonstrate a high application potential in general purpose electroluminescent devices.

scholarly journals Optically transparent electrodes for spectroelectrochemistry fabricated with graphene nanoplatelets and single-walled carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31431-31439 ◽  
Author(s):  
Jesus Garoz-Ruiz ◽  
David Ibañez ◽  
Edna C. Romero ◽  
Virginia Ruiz ◽  
Aranzazu Heras ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanomaterials ◽  
Single Walled Carbon Nanotubes ◽  
Graphene Nanoplatelets ◽  
Transparent Electrodes ◽  
Single Walled Carbon ◽  
Optically Transparent ◽  
Walled Carbon Nanotubes ◽  
Optically Transparent Electrodes

Hybrid optically transparent electrodes based on single-walled carbon nanotubes and graphene nanoplatelets have been fabricated. The new methodology can be used with other carbon nanomaterials.

Directed Assembly of Nanoelements Using Electrostatically Addressable Templates

2005 ◽  
Vol 901 ◽  
Author(s):  
Xugang Xiong ◽  
Prashanth Makaram ◽  
Kaveh Bakhtari ◽  
Sivasubramanian Somu ◽  
Ahmed Busnaina ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electric Field ◽  
Electric Fields ◽  
Directed Assembly ◽  
Single Wall Carbon Nanotubes ◽  
Nanoparticle Assembly ◽  
Single Wall Carbon ◽  
Ac Electric Fields ◽  
Ac Electric Field ◽  
Dc Electric Field

AbstractDirected assembly of nanoparticles and single wall carbon nanotubes (SWNTs) using electrostatically addressable templates has been demonstrated. Nanoparticles down to 50 nm are assembled on the Au micro and nanowires of the templates in a DC and AC electric fields. The nanoparticles can be assembled in monolayers and thicker layers. Single wall carbon nanotubes (SWNTs) are also assembled without alignment on Au wires using the nanotemplate. As the size of the template wires is reduced to nanoscale dimensions, an AC electric field proves to be more effective for nanoparticle assembly than a DC electric field.

Multi-wall carbon nanotubes coating on a copper substrate using airbrush spray coating

2020 ◽  
pp. 095440892095915
Author(s):  
M Meikandan ◽  
P Ganesh Kumar ◽  
D Sakthivadivel ◽  
VS Vigneswaran ◽  
K Malar Mohan
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Pure Copper ◽  
Copper Substrate ◽  
Multiwall Carbon Nanotubes ◽  
Spray Coating ◽  
Future Generation ◽  
Normal Surface ◽  
Multi Wall Carbon Nanotubes ◽  
Coating Technique

The spray coating technique is used in this study to spread a thin layer of nanoparticle on a large flat substrate. The proposed spray coating techniques has a great potential for large scale productions, as these techniques have no restrictions on the substrate size and low utilization of the process parameters. In this study, a simple airbrush spray coating technique is used to deposit the multiwall carbon nanotubes (MWCNTs) on copper substrates with a decent deposition control. The microstructures, surface roughness, and wettability of the coated substrates were tested and compared with the pure copper substrates. The MWCNTs coated copper substrates exhibits a significant enhancement of the mechanical properties compared to the normal surface. The thickness of the copper substrates increases with increase in coating weight concentrations, the maximum thickness 1.43 microns achieved at 0.4 wt. % of MWCNTs. The usage of copper and MWCNTs based thin film signifies a inspiring but possibly a sustaining chance for developing the future generation heat transfer materials

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