scholarly journals Fabrication of Silver Interdigitated Electrode by a Stamp Method

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Kan-Sen Chou ◽  
Chia-Hsuan Lee
Keyword(s):  
Electrical Resistivity ◽  
Glass Substrate ◽  
Applied Force ◽  
Interdigitated Electrode ◽  
Interdigitated Electrodes ◽  
Silver Colloids ◽  
Average Dimension ◽  
Silver Ink ◽  
Optimal Force ◽  
In The Beginning

A stamp method was developed in this study to fabricate interdigitated electrodes (IDEs) on glass substrate from a 37.5 wt% silver ink. This method is simple and fast. A small amount of silver ink was first dripped into an IDE-patterned sponge of a stamp and then one could stamp out the desired IDE pattern made of nanosized silver colloids on a glass substrate, which was subsequently sintered at 280°C for 10 minutes to obtain the final silver IDE. Our brief study showed that when a large stamping force was used, more ink would be stamped out in the beginning and it decreased after each usage. However, if the force was too small, there would not be sufficient ink for a complete IDE. There existed therefore an optimal force to fabricate IDEs with minimal changes from sample to sample. The average dimension of an IDE when the applied force was 102 gm was roughly 403 ± 20 µm in width and 1154 ± 153 nm in height, and the average final electrical resistivity was about10×10-6 Ω-cm.

scholarly journals Fluorescence enhancement of fluorophores tethered to different sized silver colloids deposited on glass substrate

Biopolymers ◽  
2004 ◽  
Vol 77 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Joanna Lukomska ◽  
Joanna Malicka ◽  
Ignacy Gryczynski ◽  
Zoya Leonenko ◽  
Joseph R. Lakowicz
Keyword(s):  
Glass Substrate ◽  
Fluorescence Enhancement ◽  
Silver Colloids

Preparation and Properties of P-Type Transparent Conductive NiO Films

2010 ◽  
Vol 123-125 ◽  
pp. 181-184 ◽  
Author(s):  
S.C. Chen ◽  
T.Y. Kuo ◽  
Y.C. Lin ◽  
C.L. Chang
Keyword(s):  
Electrical Resistivity ◽  
Glass Substrate ◽  
Composite Films ◽  
Cu Content ◽  
High Electrical Resistivity ◽  
Xrd Patterns ◽  
P Type ◽  
Cu Ions ◽  
Type Conduction ◽  
Nio Films

The NiO-Cu composite films with various Cu contents of 0 – 18.17 at.% are deposited on glass substrate. An ultra high electrical resistivity (ρ) is obtained and cannot be detected by four point probe measurement when the Cu contents in the films are lower than 6.97 at.%. The ρ value is reduced significantly to 35.8 Ω-cm as Cu content is increased to 9.18 at.%, and it further decreases to 0.02 Ω-cm when the Cu content further increases to 18.17 at.%. The Hall measurement for all Cu-doped NiO films show p-type conduction. In addition, the transmittance of NiO films also decreases continuously from 96 % to 43 % as Cu content increases from 0 to 18.17 at.%. The XRD patterns of Cu-doped NiO films only appear NiO peaks and the crystallinity of NiO films becomes worse as Cu content is added to above 6.97 at.%. Large amount of lattice sites of Ni2+ ions in NiO crystalline are replaced by the Cu+ ions that leads to p-type conduction and result in the degradation of crystallinity for NiO-Cu composite films having higher Cu content.

Anisotropic electrical properties of sculptured thin films

2013 ◽  
Vol 91 (8) ◽  
pp. 658-661 ◽  
Author(s):  
C.B. Nelson ◽  
T.H. Gilani
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Electrical Conduction ◽  
Glass Substrate ◽  
Dc Electrical Resistivity ◽  
Sculptured Thin Films ◽  
Dielectric Model ◽  
Good Agreement

The anisotropy in DC electrical resistivity of a chromium (Cr) sculptured thin film (STF) prepared on a glass substrate is measured and explained using a simple linear dielectric model for electrical conduction in metallic STFs. The experimental anisotropy as a function of growth angle of Cr columns on a glass substrate is in good agreement with the model.

Preparation and Tribological Behavior of PAH/PAA Molecular Deposition Films

2005 ◽  
Author(s):  
Deguo Wang ◽  
Xuexin Yu ◽  
Siwei Zhang ◽  
Dapeng Feng
Keyword(s):  
Atomic Force Microscope ◽  
Friction Force ◽  
Glass Substrate ◽  
Tribological Behavior ◽  
Lateral Force ◽  
Atomic Force ◽  
Number Of Layers ◽  
In The Beginning ◽  
Deposition Technology ◽  
Increasing Load

PAH/PAA polymer multilayer ultrathin film was prepared by molecular deposition technology. The morphology and nano-tribological behaviors of the film were investigated by using atomic force microscope (AFM). It has been found that the friction force of the PAH/PAA polymer molecular deposition film is obviously less then that of the glass substrate, and the friction force increased with increasing load. However, the friction force decreased in the beginning and increased in the sequel with increase in the number of layers, which might be attributed to the change of surface topography with different layers. Moreover, it was found that the profile of both topography and lateral force has good coherence by analyzing the AFM images.

scholarly journals Electrical Resistivity of Pristine and Functional Single-Wall Carbon Nanotubes

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Yijiang Lu ◽  
Jing Li ◽  
Haiping Hong
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Resistivity ◽  
Electric Field ◽  
Polymer Nanocomposites ◽  
Functional Group ◽  
Single Wall Carbon Nanotubes ◽  
Electrical Field ◽  
Interdigitated Electrode ◽  
Single Wall Carbon ◽  
Lower Resistivity

The resistance of several pristine and functional single-wall carbon nanotubes (SWNTs) deposited and dried on interdigitated electrode (IDE) chips was investigated to better understand how functional groups influence their resistivity. Without the external electrical field, the resistance was generally increased for the sulfonated and fluorinated SWNTs but not for COOH-SWNTs. With a 3 V electric field applied during depositing, while no change in resistance was found for the purified pristine SWNTs, fluorinated SWNTs, COOH SWNTs, and Ni-SWNTs, a significant decrease in resistance was observed in sulfonated SWNTs and unpurified pristine SWNTs, which could be due to the alignment of SWNTs in an electric field. The alignment of the sulfonated SWNTs is most likely due to the charge of the sulfate functional group. It is interesting to note that the alignment was found in the unpurified pristine SWNTs but not in the purified pristine ones which have lessened resistivity. The lower resistivity in the purified pristine SWNTs may be due to the smaller number (<5%) of impurities. The significance of this research is that hydrophilic COOH-SWNTs could be a better candidate than the hydrophobic pristine SWNTs for being used in many applications, especially in polymer nanocomposites.

scholarly journals Studies On The Electrical Properties Of Cu Substituted Li-Ferrites

1970 ◽  
Vol 35 (2) ◽  
pp. 221-228 ◽  
Author(s):  
M Samir Ullah ◽  
S Manjura Hoque ◽  
FA Khan ◽  
Saroaut Noor ◽  
MA Hakim ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Electrical Resistivity ◽  
Diffraction Method ◽  
Lattice Parameter ◽  
Compositional Variation ◽  
X Ray Diffraction ◽  
Electron Hopping ◽  
Cu Content ◽  
In The Beginning ◽  
Increasing Temperature

Polycrystalline Li-Cu mixed ferrites were prepared by double sintering ceramic technique. Cu substituted Li ferrites having the general formula Li0.5-x/2CuxFe2.5-x/2O4 where, x = 0.0 to 1.0 and the samples were sintered at 1100°C for 3 hours in the normal atmosphere. The prepared samples were confirmed in the spinel structure by the X-ray diffraction method. The lattice parameter and porosity were calculated for different compositions. The electrical resistivity and dielectric constant have been investigated as a function of composition and temperature. It was observed that the resistivity decreased with increasing temperature and exhibited semiconducting nature of the sample. The compositional variation of resistivity and dielectric constant showed inversed trend with each other at room temperature for Cu content, x > 0.3. This was found to support the electron hopping conduction mechanism. The dielectric constant increased slowly with temperature in the beginning and after that dielectric constant increased rapidly for different samples. As the temperature increased, thermal energy provided to the sample played an important role to decrease the relaxation time and hence there was an increase in dielectric constant. Dielectric constant has been observed as a function of frequency and it decreased with increasing frequency. Key words: Electrical resistivity; Porosity; Dielectric constant; Electron hopping DOI: http://dx.doi.org/10.3329/jbas.v35i2.9428 JBAS 2011; 35(2): 221-228

scholarly journals Rapid Inkjet-Printed Miniaturized Interdigitated Electrodes for Electrochemical Sensing of Nitrite and Taste Stimuli

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1037
Author(s):  
Sohan Dudala ◽  
Sangam Srikanth ◽  
Satish Kumar Dubey ◽  
Arshad Javed ◽  
Sanket Goel
Keyword(s):  
Inkjet Printing ◽  
Glass Substrate ◽  
Printed Circuit Board ◽  
Electrochemical Impedance ◽  
Single Step ◽  
Electrochemical Sensing ◽  
Circuit Board ◽  
Interdigitated Electrodes ◽  
Sensing Applications ◽  
Direct Laser

This paper reports on single step and rapid fabrication of interdigitated electrodes (IDEs) using an inkjet printing-based approach. A commercial inkjet-printed circuit board (PCB) printer was used to fabricate the IDEs on a glass substrate. The inkjet printer was optimized for printing IDEs on a glass substrate using a carbon ink with a specified viscosity. Electrochemical impedance spectroscopy in the frequency range of 1 Hz to 1 MHz was employed for chemical sensing applications using an electrochemical workstation. The IDE sensors demonstrated good nitrite quantification abilities, detecting a low concentration of 1 ppm. Taste simulating chemicals were used to experimentally analyze the ability of the developed sensor to detect and quantify tastes as perceived by humans. The performance of the inkjet-printed IDE sensor was compared with that of the IDEs fabricated using maskless direct laser writing (DLW)-based photolithography. The DLW–photolithography-based fabrication approach produces IDE sensors with excellent geometric tolerances and better sensing performance. However, inkjet printing provides IDE sensors at a fraction of the cost and time. The inkjet printing-based IDE sensor, fabricated in under 2 min and costing less than USD 0.3, can be adapted as a suitable IDE sensor with rapid and scalable fabrication process capabilities.

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

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