2d graphene oxide nanosheets as an adhesive over-coating layer for flexible transparent conductive electrodes
Graphene oxide (GO)
Nano-flakes have received attention in various applications.
Due to the presence of a large number of oxygen functional groups, a single 2D GO nano sheet is insulated, transparent and highly dispersed in the ecological environment
Friendly water, as well as the hydrophilic properties with strong adhesion to the hydrophilic surface, which will be the use of supercoating layer (OCL)
Protective layer of conductive Nano Wire base indium
Free transparent conductive film (TCF).
The ultra-thin 2D adhesive go ocl nano sheet is expected to be tightly fixed with silver nano wires (AgNWs)
, Reduce the square resistance and produce a uniform TCF, providing a complete solution to solve the high fog, low transparency and mechanical instability of traditional OCL without a thick tc.
Our new 2D insulated hydrophilic go ocl successfully offers a large
Regional, flexible, highly transparent ag northwest TCF.
All ag Northwest/PET movies are carefully prepared by Samsung ElectronicsMechanics (Suwon, Korea).
GO flakes described in our previous publication (flake size ≈ 0.
05mm, single layer, concentration> ~ 80%)
Preparation using an improved Hummers method.
HS was purchased from Aldrich for corrosion testing.
For control experiments, there is no pre-set PET substrate
Observe the role of GO in the silver nano-line.
PET substrate pre-
Treat 10, 20, 30, 40 and 50 seconds with 3% O/ar plasma, give 41. 9°, 38. 9°, 33. 3° and 26.
3 degrees WCAs, respectively.
For Rod coating technology, ag northwest ink is moved on a line at the top of the hydrophilic PET substrate (
PET piece = 10 × 10 cm or A4 size).
Then, a Meyer stick (10)was a quickly (Within 1 second)
Pull down on AgNW ink with your hands.
By using ethanol dilution, ag northwest ink of different density is obtained on the hydrophilic PET substrate. The obtained-
Then dry the ag Northwest/PET film in the oven at 140 °c for 4 minutes.
Treatment of ag Northwest/PET film again with plasma (3% O/argon)
60 seconds to 20 seconds.
65 ° WCA and GO nano-flakes in aqueous solution (
Concentration = 27. 5u2005mg/L)were a 3-
The number of spraying on the hydrophilic ag Northwest/PET film was 9 times.
6 ° and then dry in the oven at 140 ° C for 4 minutes.
The final sheet resistance of each membrane was measured at 11 different points.
Exposure Test for Bell
A jar with a diameter of 10 cm and a length of 25 cm was performed to evaluate the resistance
Vulcanization is performed using two different types of film.
Both Ag Northwest/PET film and GO/ag Northwest/PET film were incubated in a glass container with an inner diameter of mm. 99.
5% hydrogen sulfide gas (Aldrich Co. )
Then, with the help of ar carrier gas with a flow of 10 SCCM, it is allowed to flow into the reaction chamber.
Finally, the film was exposed to 20 min in 50 SCCM diluted with HS.
After washing with de-rinsing, the paper resistance was checked
Ionize water and blow dry with nitrogen.
To measure the resistance and electrical stability of the Au/GO/ag Northwest/PET film, each Au/GO/ag Northwest/PET sample was prepared by a hot evaporation gold top electrode, the distance between the gold electrodes is about 30 μm, separated by a shadow mask.
At room temperature, the sheet resistance of these films was measured with Keithley 4200 semiconductor representation system.
The bending capacity of GO/ag Northwest/PET film was systematically analyzed using bending test (ZBT-200, Z-Tech, Korea).
Two terminal measurements were used to monitor the change in resistance of each ag Northwest/PET and GO/ag Northwest/PET film, which varies from 0 to 15 degrees in bending angles.
The radius of curvature of the curved film is about 2mm.
When the film is straight, the resistance of the film is recorded.
In the form of each sample, the director of the education administration (
Flying Nova™NanoSEM 200 or jeol jsm-7600F), AFM (
Psia xe-digital instrument D3100
100 or Agilent 5500 AFM/SPM), OM (
Wm003900a S39a or some technical visual cameras), and X-
Ray diffraction (
Ultima IV, Rigaku).
WCA measurements were performed using the SEO Phoenix 300 microscope to determine the wetting properties of the surface of the film.
Optical transmission and reflection profiles of the film were recorded on Varian Cary 5000 UV-
Visible splitter and Konica Minolta level splitter CM-3600D.
The haze value of the film (
Defined as the ratio between diffusion and total transmission, ΔT/T)
Measurement using NDH 5000 smog meter (
Japan Denshoku Industrial Co. , Ltd. , Ltd. ).
Use Konica Minolta horizontal spectrometer CM-to evaluate the color of the film3600D.
Linear and 2D Raman spectra were measured on Renishaw RM 1000-
Enter through a 513-equipped Raman microscope
Nm laser and Jobin Yvon/Horiba LabRAM Aramis Raman microscope equipped with 513-nm laser (
Mapping software: LabSpec5), respectively.
The surface chemical bonding status was analyzed using VG Microtech ESCA 2000 equipped with Mg/Al sources.
The value of each sample uses four-
Point probe surface resistivity meter (R-CHEK 4-
RC2175 type point chip resistance meter.
These values are obtained by averaging measurements of at least 10 points per sample.