Presentation of Printed graphene sensors for human motion detection iat MSRC 2018

1. Printed Graphene Sensors
for Human Motion Detection in IoT applications
Leonard Ng W. T.

2. BSc MSc PhD

4. Graphene’s electronic properties

5. How strain sensors work
Resistive Sensors

6. Crack Propagation Mechanism
200 μm

7. Capacitance (c) =
𝐴𝑟𝑒𝑎 (𝐴)
𝑑𝑒𝑝𝑡ℎ (𝑑)
𝜀0
Conductive
Plates
Dielectric
𝐴
𝑑
Capacitive Sensors

8. Detecting human motion

14. What next?

15. “Data is the new gold”
“If data is the new gold,
then sensors are the new shovels”
-Leonard Ng W. T.

16. Key References
Geim, A. K. (2009). Graphene: Status and Prospects. Science, 324(5934), 1530–1534. http://doi.org/10.1126/science.1158877
Geim, A. K., & Novoselov, K. S. (2007). The rise of graphene. Nat. Mater., 183–191. Retrieved from http://arxiv.org/abs/cond-
mat/0702595
Amjadi, M. , Kyung, K. , Park, I. and Sitti, M. (2016), Stretchable, Skin‐Mountable, and Wearable Strain Sensors and Their Potential
Applications: A Review. Adv. Funct. Mater., 26: 1678-1698. doi:10.1002/adfm.201504755
Patel, S., Park, H., Bonato, P., Chan, L., & Rodgers, M. (2012). A review of wearable sensors and systems with application in
rehabilitation. Journal of NeuroEngineering and Rehabilitation, 9(1), 21. http://doi.org/10.1186/1743-0003-9-21
Wang, W., Yang, T., Zhu, H., & Zheng, Q. (2015). Bio-inspired mechanics of highly sensitive stretchable graphene strain sensors.
Applied Physics Letters, 106(17), 171903. http://doi.org/10.1063/1.4919105
Yao, S., & Zhu, Y. (2014). Wearable multifunctional sensors using printed stretchable conductors made of silver nanowires. Nanoscale,
6(4), 2345. http://doi.org/10.1039/c3nr05496a
Hwang, H., Kim, D.-G., Jang, N.-S., Kong, J.-H., & Kim, J.-M. (2016). Simple method for high-performance stretchable composite
conductors with entrapped air bubbles. Nanoscale Research Letters, 11(1), 14. http://doi.org/10.1186/s11671-016-1229-8
Amjadi, M., Pichitpajongkit, A., Lee, S., Ryu, S., & Park, I. (2014). Highly Stretchable and Sensitive Strain Sensor Based on Silver
Nanowire–Elastomer Nanocomposite. ACS Nano, 8(5), 5154–5163. http://doi.org/10.1021/nn501204t

17. Fabrication of sensors

21. Center Roll Apron RollFeed Roll
Material Feed
Knife Edge
Material
Removal
Conductivity

22. Shear-thinning of Ink

23. Screen Printing