Rapid prototyping of all-solution-processed multi-lengthscale electrodes using polymer-induced thin film wrinkling
Controllable size electrodes on multiple longitudinal scales are important for integrated solid Bioanalytical Systems
Phase equipment with solutionphase samples.
Here, we proposesolution-
Using Intelligent Polymer Processing and film folds, this is the ideal choice for fast prototyping of adjustable triads
The size electrode can be extended to mass manufacturing. Although all-solution-
Processing is an attractive alternative to steam
The cost of the electrode is manufactured, which usually results in a low conductivity of the film and poor adhesion of the substrate.
These limitations are addressed here by using a smart polymer to create a shape-preserving layer of overlapping folds on the substrate to shorten the current path and embed the conductor in the polymer layer.
The structural evolution of these fold electrodes deposited on the nanoparticles seed layer by chemical deposition was studied at different deposition times to understand its structural parameters (such as pores, fold wavelengths and Heights)
In addition, the effect of structural parameters on functional properties such as electrical performance
Active surface area and surface-
Enhanced Raman Scattering was studied.
It was found that the folds of chemical deposition
The deposited film can be used to reduce the resistance of the film, increase the surface area and enhance the surface
Enhanced Raman scattering signal. (3-Aminopropyl)
Silicon three oxygen (APTES, 99%), 4-
Four chlorine ring hydrogen (III)trihydrate (
HAuCl 3HO, will. . . > 99. 9%)
And hydrogen peroxide (HO, 30%)
Bought from Sigma. Aldrich (St.
Louis, Missouri). Sulfuric acid (HSO)
From Karden (
All reagents are analytical grade and can be used without further purification. Milli-Q grade water (18. 2u2009M Ω)
Used to prepare all solutions. Pre-
Stress polystyrene (PS)substrates (
Graphix shrink film, another height of Graphix, Ohio)
Cut into desired shape using Robo Pro CE500040-CRP cutter (
American company. , Irvine, CA).
PS substrate for 2-
Alcohol, tihao, then dry air.
The substrate is treated with air plasma in an expanded plasma cleaner (Harrick Plasma)
Oxidation of the substrate surface at a high RF power setting of 60 seconds.
The substrate is then immersed in a 10% APTES solution in the incubated micro-rocking bed (
Work for 16 hours at 120 rpm and room temperature.
After silica, the substrate was treated by ultrasound in di ho for 10 minutes and rinsed and dried.
The required electrode layout is designed in Adobe Illustrator and cut into vinyl (
FDC 4304, FDC graphic film, South Bend, Indiana)
Use the Robo Pro CE5000-40-
CRP vinyl cutter.
The mask is applied to the silicon PS substrate.
Gold nanoparticles (Au NPs)
Synthesized according to preparation 1, refrigerated to use.
The shielded PS substrate is then fixed in a petri dish with double sided tape and covered for 16 hours in an Au NPs solution.
The PS substrate covered by Au NP is placed in 5 ml solution of 0.
1% HAuCl solution is on the rocking bed at 250 rpm at room temperature.
Then, 30% u2009 μ l of 250 HO was added to the solution and chemical deposition of Au was started.
The use of the Pipettes tip eliminates bubbles formed by the edge of the vinyl mask.
Remove the vinyl mask after deposition and place the unit in the oven (
Model: 664, Fisher Science, Marietta, OH)
Shrink for 3 minutes at 60 °c.
Using jeol jsm to obtain SEM images of gold film before and after contraction
A 7000 S scanning electron microscope with an acceleration voltage of 2 kv, a working distance of 6mm, and a low probe current.
The radial mean 2D FFT analysis in image J and MATLAB was used to extract aperture and wavelength data from SEM images, respectively.
TEM imaging was performed on crossover
Part of the fold device using JEOL 2010 f
Before imaging, these devices are embedded and cut by slicer.
Use HL5500PC-measure the resistance values of shrink and unshrunk chemical deposition electrodes on PS using van der Pauw method
Hall measurement system with HL5500 buffer amplifier (
Milpitas nano measurement, California).
Using the Greek cross electrode geometry, the length and height are 10mm, 3mm before shrinkage and in width.
Evaluation of adhesion using the Scottish tape stripping test of Instron 4411 (
Instron Corporation, Norwood, MA, United States of America)machine.
Tape is applied to the surface of the electrode and stripped using a constant speed of 20 mm/min on multiple devices (nu2009=u20093). The roughness (Ra)and peak-to-valley (PV)
The value of the folded electrode device is measured using Zygo NewView 5000 white light interferometer (
Chinese domain CT Zygo company)
Multiple areas of each device (nu2009>u20093)
Through multiple devices (nu2009=u20093).
Get the measurement result using 10 × objective target and 2 × image zoom settings (
360 u2009 mu m u2009 × u2009 270 u2009 mu m View)
Use a charge coupled camera with an imaging pixel size of 11. 2u2009μm.
Data filtering and analysis using MetroPro.
Apply FFT high pass filter, use cut-
Turn off frequency 183.
35mm, spikes with a height value greater than 10 * rms (
Root of Square
Removed to eliminate any changes due to uneven substrate or any surface contaminants.
Using the CHI 660D electro-chemical Workstation (
Austin, tx ch instruments)
And a standard three. electrode set-up.
The system is composed of Ag/AgCl reference electrode, platinum wire reverse electrode and full-solution-
Treated gold electrode as working electrode.
The electrochemical surface area measurement was carried out in 0.
05 u2009 m hso solution is 0. 05u2009V/s.
The peaks of the resulting cyclic voantu reduction part are integrated to obtain the charges involved in the redox process and divided by the surface charge density of the Au (386 μC/cm)
Get the value of the surface area.
Using Renishaw inVia Raman microscopy, Raman measurements were performed with 632.
8 nm HeNe laser at 5% power (25u2009mW)
And the target of 50x.
The measurement results were obtained using 10 exposures and 5 cumulative times.
Au membrane samples were incubated with 4 mpmpy for one hour at room temperature and rinsed with di ho and dried.
Samples were measured before incubation with 4 mpmpy, after incubation with 4 MPY and after contraction.
Background fluorescence signals are subtracted from the spectrum and fourth-order polynomial baseline subtraction is performed.
Enhancement factor (EF)of the 1 min-
Because the movie is calculated based on 20 minutes.
Use the equation (1)
: Where is the strength of the peak of 1090 cuccm, the peak with the loop stretching/breathing and C-
S stretched and incubated with a concentration of 4 mpmpy.