Micropatterning of Monodisperse Spherical Particles by Electrophoretic Deposition Process Using Interdigitated Microarray Electrode

Micrometer wire consisting of microbeads was successfully fabricated onto a patterned conductive electrode substrate by an electrophoretic deposition (EPD) process with precise control of electric field distribution generated in the colloidal suspension. Monodisperse polystyrene microspheres with 320 nm in diameter and an interdigitated microarray Au electrode having 10 μm in width and 5 μm in spacing were used in this EPD system. A micropattern of polystyrene particles with two dimensional arrays was formed onto the patterned electrode by the EPD process with two electrode system using an electrostatic interaction between the electrodes and the charged particles in the suspension.

Download Full-text

Micropatterning of Phenylsilsesquioxane Thick Films by the Electrophoretic Sol-Gel Deposition Process Using ITO Substrates with a Hydrophobic-Hydrophilic Patterned Surface

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.314.159 ◽

2006 ◽

Vol 314 ◽

pp. 159-166 ◽

Cited By ~ 4

Author(s):

Kiyoharu Tadanaga ◽

Kenji Takahashi ◽

Masahiro Tatsumisago ◽

Atsunori Matsuda

Keyword(s):

Heat Treatment ◽

Electrophoretic Deposition ◽

Treatment Process ◽

Thick Films ◽

Sol Gel ◽

Deposition Process ◽

Continuous Phase ◽

Spherical Particles ◽

Heat Treatment Process ◽

Patterned Surface

Micropatterns of phenylsilsesquioxane thick films have been prepared by electrophoretic sol-gel deposition using ITO-coated substrates with a hydrophobic-hydrophilic patterned surface. After the electrophoretic deposition, phenylsilsesquioxane thick films were formed only on hydrophilic areas on the pattern. These thick films obtained immediately after the electrophoretic deposition were opaque due to light scattering. However, phenylsilsesquioxane particles in the films were morphologically changed from aggregates of the spherical particles to continuous phase by a heat treatment process, and finally convex shaped phenylsilsesquioxane micropatterns were formed only on the hydrophilic areas.

Download Full-text

Electrophoretic Deposition of 10B Nano/Micro Particles in Deep Silicon Trenches for the Fabrication of Solid State Thermal Neutron Detectors

International Journal of High Speed Electronics and Systems ◽

10.1142/s0129156418400025 ◽

2018 ◽

Vol 27 (01n02) ◽

pp. 1840002 ◽

Cited By ~ 1

Author(s):

Machhindra Koirala ◽

Jia Woei Wu ◽

Adam Weltz ◽

Rajendra Dahal ◽

Yaron Danon ◽

...

Keyword(s):

Solid State ◽

Thermal Neutron ◽

Electrophoretic Deposition ◽

Detection Efficiency ◽

Chemical Vapor ◽

Cost Effective ◽

Deposition Process ◽

Neutron Detectors ◽

Micro Particles ◽

Silicon Trenches

We present a cost effective and scalable approach to fabricate solid state thermal neutron detectors. Electrophoretic deposition technique is used to fill deep silicon trenches with 10B nanoparticles instead of conventional chemical vapor deposition process. Deep silicon trenches with width of 5-6 μm and depth of 60-65 μm were fabricated in a p-type Si (110) wafer using wet chemical etching method instead of DRIE method. These silicon trenches were converted into continuous p-n junction by the standard phosphorus diffusion process. 10B micro/nano particle suspension in ethyl alcohol was used for electrophoretic deposition of particles in deep trenches and iodine was used to change the zeta potential of the particles. The measured effective boron nanoparticles density inside the trenches was estimated to be 0.7 gm cm-3. Under the self-biased condition, the fabricated device showed the intrinsic thermal neutron detection efficiency of 20.9% for a 2.5 × 2.5 mm2 device area.

Download Full-text

Titanium Oxide (TiO2) Coatings on NiTi Shape Memory Substrate Using Electrophoretic Deposition Process

International Journal of Engineering ◽

10.5829/idosi.ije.2013.26.07a.05 ◽

2013 ◽

Vol 26 (7 (A)) ◽

Cited By ~ 2

Author(s):

V. Khalili

Keyword(s):

Shape Memory ◽

Titanium Oxide ◽

Electrophoretic Deposition ◽

Deposition Process ◽

Tio2 Coatings

Download Full-text

Fabrication of ordered ZnO hierarchical structures controlled via surface charge in the electrophoretic deposition process

Nanotechnology ◽

10.1088/0957-4484/17/17/027 ◽

2006 ◽

Vol 17 (17) ◽

pp. 4445-4450 ◽

Cited By ~ 29

Author(s):

Jian-Hong Lee ◽

Ing-Chi Leu ◽

Yi-Wen Chung ◽

Min-Hsiung Hon

Keyword(s):

Surface Charge ◽

Electrophoretic Deposition ◽

Hierarchical Structures ◽

Deposition Process

Download Full-text

How Electrophoretic Deposition with Ligand-Free Platinum Nanoparticles Affects Contact Angle

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.654.218 ◽

2015 ◽

Vol 654 ◽

pp. 218-223 ◽

Cited By ~ 2

Author(s):

Alexander Heinemann ◽

Sven Koenen ◽

Kerstin Schwabe ◽

Christoph Rehbock ◽

Stephan Barcikowski

Keyword(s):

Contact Angle ◽

Electrophoretic Deposition ◽

Platinum Nanoparticles ◽

Deposition Time ◽

Deposition Process ◽

Angle Measurements ◽

Contact Angle Measurements ◽

Ligand Free ◽

Vital Parameters ◽

Scanning Electron

Electrophoretic deposition of ligand-free platinum nanoparticles has been studied to elucidate how wettability, indicated by contact angle measurements, is linked to vital parameters of the electrophoretic deposition process. These parameters, namely the colloid concentration, electric field strength and deposition time, have been systematically varied in order to determine their influence on the contact angle. Additionally, scanning electron microscopy has been used to confirm the homogeneity of the achieved coatings.

Download Full-text

Mathematical Model of In-Flight Oxidation of Metallic Particles in Thermal Spraying

Thermal Spray 2000: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc2000p0187 ◽

2000 ◽

Author(s):

A.M. Ahmed ◽

R.H. Rangel ◽

V.V. Sobolev ◽

J.M. Guilemany

Keyword(s):

Mathematical Model ◽

Thermal Behavior ◽

Spray Deposition ◽

Particle Surface ◽

Thermal Spraying ◽

Deposition Process ◽

Conservation Equation ◽

Spherical Particles ◽

Energy Conservation Equation ◽

Acceleration And Deceleration

Abstract This paper presents a mathematical model of the in-flight oxidation of spherical particles during thermal spray deposition process. The model includes analysis of the mechanical and thermal behavior of the powder particles. The former accounts for acceleration and deceleration of the particles at the spray distance under different fluid velocities. The thermal behavior takes into account heating, melting, cooling and possible solidification as the particle travel towards the substrate. A finite-difference method is used to solve the thermal energy conservation equation of the particles. The model includes nonequilibrium calculations of the phase change phenomena in the liquid-solid (mushy) zone. The growth of the oxide layer at the particle surface is represented by a modified boundary condition, which includes finite-rate oxidation. The results obtained give the interrelations between various process parameters and the oxidation phenomenon and agree with experimental observation.

Download Full-text