Fabrication of Flexible and Transparent Graphene Based Gas Sensor
Graphene with its amazing properties has changed the way we look at Electronics; the commercially available silicon can be replaced by the 2D-material due to its promising properties such as high mobility, high sensitivity, and its flexibility. The atomically thin nature of 2D-material has ultra-hig
Project Title
Fabrication of Flexible and Transparent Graphene Based Gas Sensor
Project Area of Specialization
Project Summary
Graphene with its amazing properties has changed the way we look at Electronics; the commercially available silicon can be replaced by the 2D-material due to its promising properties such as high mobility, high sensitivity, and its flexibility. The atomically thin nature of 2D-material has ultra-high rate of absorption and desorption of gaseous and humidity molecules as compare to bulk materials. Here, we propose to fabricate a humidity or gas sensor which can be able to detect multiple environmental gases or vapor molecules with fast response time. Furthermore, fabricated sensor will be interfaced with Arduino UNO microcontroller in order to design complete system level gas sensing kit for real time applications.
Project Objectives
1: To fabricate graphene based flexible and transparent humidity and gas sensor.
2:To design and setup humidity and gas sensing chamber.
3:To characterize the fabricated humidity/gas sensor and measure response time.
4: To interface fabricated humidity/gas sensor with Arduino microcontroller in order to develop complete humidity and gas sensing kit.
Project Implementation Method
To fabricate the gas/humidity sensor, graphene film will be transferred onto the surface of the polymer. The CVD-grown graphene on a copper foil (ACS Materials) will be spin-coated with PMMA (ALLRESIST AR-26, speed = 5000 rpm, time = 60 s). The copper foil will be then dissolved in a CuSO4 + HCl+ H2O solution (CuSO4 : HCl : H2O = 10 g : 50 ml : 50 ml) for 3 hours. The PMMA coated graphene film will be then transferred to the top of polymer (plastic). The PMMA will be removed in acetone and cleaned by IPA. The fabricated sensor will be placed into the chamber shown in device design portion and then will be interfaced with arduino mega using jumper wires to display the percentage of humidity and gas exposed on the sensor.
| Device Design: Figure :1 Figure: 2
Figure:1 The measurement system setup and Figure:2 the homemade humidity controllable chamber with electric input/outputs. In (f), the left side metal cover with no holes (D) is used under darkconditions, and the right side cover with a transparent glass window (L) is used for sun-light testing as well as Raman characterization. |
Device Design:
Figure :1 Figure: 2
Figure:1 The measurement system setup and Figure:2 the homemade humidity controllable chamber with electric input/outputs. In (f), the left side metal cover with no holes (D) is used under darkconditions, and the right side cover with a transparent glass window (L) is used for sun-light testing as well as Raman characterization.
Benefits of the Project
1: It will be able to detect humidity and leaked gas faster than any silicon sensor available at market.
2: It will be transparent and flexible so can be used as wearable sensor
3: Less power consumption, it will have low power consumption as compared to silicon sensor so there will not be any need of high power supply.
Technical Details of Final Deliverable
Graphene based gas and humidity sensor have low power consumption like 1mV because of 0 bandgap of graphene, it will work in capacitive and resistive mode as well. In reverse bias the the power consumption of this device is 2mW. The parameter we will use to detect humidity will be it's resistance which is upto 100k ohm. If the gas and humidity exposure increases/decreases on the surface, there would be a change in resistance. The device will be connected with a bridge circuit to measure resistance and current changes, the bridge will be connected with Arduino Mega which will read the resistance/current given by bridge circuit and finally it will display the value of humidity on LCD attached with arduino.
Final Deliverable of the Project
Type of Industry
Technologies
Sustainable Development Goals
Required Resources
| Elapsed time since start of the project | Milestone | Deliverable |
|---|---|---|
| Month 1 | Literature Review | Done with literature review |
| Month 2 | Testing all the components individually | Done with testing all the component |
| Month 3 | Designing a prototype using simple humidity sensor | Done with prototype |
| Month 4 | Fabricating Graphene based transparent and flexible humidity and gas sensor | Done with fabrication of the humidity sensor |
| Month 5 | Setting up the chamber and device design | Done with Designing |
| Month 6 | Testing the fabricated humidity and gas sensor characteristics | Done with testing |
| Month 7 | Interfacing the sensor and Arduino Mega | Done with Interfacing |
If you need this project, please contact me on contact@adikhanofficial.com
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