Fabrication and Characterization of Printed Sensors based on Nano-composite Materials
- Abstract
- Due to an expected increase in the development of wearable devices technology over the next 5 years, the global wearable market demand is likely to increase at a very high rate by 2021. One of the significant factors of wearables is the incorporation of sensors which can monitor people's health and surroundings in real time and continuously. Though the wearable sensors technology appears to be quite attractive and is gradually becoming a necessity in everyday life of common people, this emerging field is imposing several challenges and not much research has been done to address them. One major challenge is to have sensors which can monitor humidity, temperature, motion etc. continuously in real time with ultrafast response and recovery times. Moreover, conventional vacuum based fabrication technologies which are mostly used for the fabrication of sensors, are not very cost efficient, and as a result wearable devices are quite expensive, and out of buying range for most of the people.
This thesis reports on the fabrication and characterization of thin film based printed sensors, which are composed of nano-composite materials. In our research work printed sensors have been fabricated using the cost efficient printed technologies like spin coating, screen printing, D-bar coating, reverse offset printing, and transfer printing on a variety of substrates ranging from glass, PET, and PDMS. All the electrical response characterizations have been done by in-house built characterization setups. The fabrication and quality of printed thin films of nano-composite materials were confirmed by FE-SEM, 3D Nano-Profiler, and optical microscopy. The chemical composition was characterized by X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Our printed sensors show ultrafast response and recovery time, and cost effective fabrication technologies filling the technological gap in existing fabrication technologies. Therefore it is believed as a result of current research that nano-composite based thin film printed sensors have a promising future in the emerging field of printed and wearable sensors industry.
- Issued Date
- 2017
- Awarded Date
- 2017. 2
- Type
- Dissertation
- Alternative Author(s)
- Shahid, Aziz
- Department
- 대학원 메카트로닉스공학과
- Advisor
- 최경현
- Table Of Contents
- List of Figures . v
List of Tables ix
Abstract . x
1. Introduction . 1
1.1. Importance of Printed Electronics 1
1.2. Types of printed Sensors . 2
1.3. Fabrication Technologies for Printed sensors 4
1.3.1. Spin Coating . 5
1.3.2. D-bar coating .. 5
1.3.3. Screen printing 6
1.3.4. Slot Die printing 8
1.3.5. Inkjet printing 8
1.3.6. Electrohydrodynamic printing 8
2. Fabrication of Environmental Sensors 10
2.1. Humidity sensor based on PEDOT:PSS and zinc stannate nano-composite . 10
2.1.1. Introduction 10
2.1.2. Experimental .. 13
2.1.3. Measurement of humidity sensing response 19
2.1.4. Results and discussion 21
2.1.5. Hierarchical comparison 23
2.2. Fabrication of ZnSnO3 based humidity sensor onto arbitrary substrates by micro-nano scale transfer printing 25
2.2.1. Introduction 26
2.2.2. Experimental 27
2.2.3. Characterization of Sensing Layer and IDTs 31
2.2.4. Humidity Sensing Response 33
2.2.5. Results and Discussion 34
2.3. Reverse Offset printed environmental friendly sucrose based temperature sensor 39
2.3.1. Introduction . 40
2.3.2. Experimental 41
2.3.3. Electrical Characterization 44
2.3.4. Results and Discussion 45
3. Highly sensitive flexible ZnSnO3/PVDF composite based human motion sensor 47
3.1. Introduction . 47
3.2. Experimental 50
3.2.1. Materials . 50
3.2.2. Sensor Fabrication 51
3.3. Sensor Characterization 53
3.4. Results and Discussion . 54
4. Conclusions and Future Prospects . 60
4.1. Conclusions 60
4.2. Future Prospects . 61
References 62
- Degree
- Doctor
- Publisher
- 제주대학교 일반대학원
- Citation
- 아지 샤하드. (2017). Fabrication and Characterization of Printed Sensors based on Nano-composite Materials
- Appears in Collections:
- Faculty of Applied Energy System > Mechatronics Engineering
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