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

2006 ◽  
Vol 301 ◽  
pp. 243-246 ◽  
Author(s):  
Jun Ichi Hamagami ◽  
Kazuhiro Hasegawa ◽  
Kiyoshi Kanamura
Keyword(s):  
Electrophoretic Deposition ◽  
Electric Field Distribution ◽  
Colloidal Suspension ◽  
Deposition Process ◽  
Electrode System ◽  
Spherical Particles ◽  
Polystyrene Microspheres ◽  
Precise Control ◽  
System A ◽  
Monodisperse Polystyrene

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.

Micropattern of Colloidal Crystal by Using Electrophoretic Deposition Process with Three-Electrode System

2006 ◽  
Vol 320 ◽  
pp. 171-174 ◽  
Author(s):  
Jun Ichi Hamagami ◽  
Kazuhiro Hasegawa ◽  
Kiyoshi Kanamura
Keyword(s):  
Electrophoretic Deposition ◽  
Colloidal Crystal ◽  
Colloidal Suspension ◽  
Deposition Process ◽  
Processing Parameters ◽  
Electrode System ◽  
Counter Electrodes ◽  
Particle Assembly ◽  
Plate Electrode ◽  
Colloidal Spheres

A novel micropatterning process for a particle assembly has been performed by using an electrophoretic deposition (EPD) method with a local electric field in a colloidal suspension generated by a three-electrode system. Monodisperse silica colloidal spheres with a diameter of 300 nm were used to fabricate micropattern of colloidal crystal. An interdigitated gold-microarray electrode with a 10 μm of width and a gold plate electrode were used as the working and the counter electrodes, respectively. After optimization of the EPD processing parameters, a micropattern was constructed from silica colloidal spheres. It had a relatively close-packed structure formed onto the interdigitated microarray electrode. This micropattern showed a characteristic optical reflectance peak due to Bragg’s law.

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

2006 ◽  
Vol 314 ◽  
pp. 159-166 ◽  
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.

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

2018 ◽  
Vol 27 (01n02) ◽  
pp. 1840002 ◽  
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.

Monodisperse polystyrene microspheres used as porogenes in the synthesis of polymer monoliths

2011 ◽  
Vol 53 (2) ◽  
pp. 172-182 ◽  
Author(s):  
E. G. Vlakh ◽  
Yu. N. Sergeeva ◽  
T. G. Evseeva ◽  
N. N. Saprykina ◽  
A. Yu. Men’shikova ◽  
...  
Keyword(s):  
Polystyrene Microspheres ◽  
Polymer Monoliths ◽  
Monodisperse Polystyrene

Electrophoretic Deposition of Titania Thin Films: Influence of Deposition Time on Microstructural and Optical Properties of the Coatings

2013 ◽  
Vol 829 ◽  
pp. 917-921
Author(s):  
Saber Ghannadi ◽  
Hossein Abdizadeh ◽  
Mohammad Reza Golobostanfard
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Electrophoretic Deposition ◽  
Deposition Time ◽  
Colloidal Suspension ◽  
Vis Spectroscopy ◽  
Titania Films ◽  
Titania Sol ◽  
Deposited Film ◽  
Deposited Films

Titania thin films were prepared by electrophoretic deposition at various deposition times (1, 5 and 10 min) in constant applied potential (5 V). For this purpose, modified titania sol was prepared as a colloidal suspension. The influence of deposition time on the thickness and optical properties of titania films was investigated. Scanning electron microscope images illustrate compact and homogeneous titania films deposited on FTO substrates. The results show that the film thickness increases with increasing the deposition time. It could be inferred from UV-Vis spectroscopy that increasing the thickness of deposited film causes higher absorbance at UV region. Also, increasing the deposition time from 1 to 5 min leads to increase in optical band gap of the deposited films.

Sign in / Sign up

Export Citation Format

Share Document