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2-8. Development of Soft Functional Nanodevices Based on Molecular Materials

| Participants

member
member_detail
Name :Won Seok Chang
Affiliation :KIMM
Tel :+82-42-868-7134
E-mail :paul@kimm.re.kr
Homepage :http://www.kimm.re.kr
member
member_detail
Name :Sungjune Jung
Affiliation :POSTECH
Tel :+82-54-279-8868
E-mail :sjjung@postech.ac.kr
Homepage :http://sdc.postech.ac.kr/
member
member_detail
Name :Unyong Jeong
Affiliation :POSTECH
Tel :+82-54-279-2148
E-mail :ujeong@postech.ac.kr
Homepage :http://hybrid.postech.ac.kr
member
member_detail
Name :Soojin Park
Affiliation :POSTECH
Tel :+82-52-217-2515
E-mail :spark@unist.ac.kr
Homepage :http://spark.unist.ac.kr
member
member_detail
Name :Sei Kwang Hahn
Affiliation :POSTECH
Tel :+82-54-279-2159
E-mail :skhanb@postech.ac.kr
Homepage :http://bnl.postech.ac.kr

| Research Purpose

Development of pragmatic wearable sensor platform that can be used in daily life based on stretchable device technology and interconnection method.

| Contents

Topic 1. Development of interconnection technology and 3-D organic semiconductor circuit printing technology based on printing

- Development of lamination of 3-D semiconductor


(left) Scheme for 3-D complementary organic semiconductor which laminated n-type and p-type semiconductor (right) Cross-section view that shows layers of 3-D complementary organic


- Introduction of new method that can program logic circuit by connecting semiconductor device array by printing method


(left) Flexible digital logic circuit (right) World’s first flexible integrated circuit system consist of programmable logic array and display


Topic 2. Development of stretchable film-type battery fabrication technology

- Development of battery packaging material for mechanical deformation stability (stretching & releasing)
- Development of stretchable battery which has long-term stability and repeatedly chargeable


Strategy for fabrication process of stretchable film-type battery


Topic 3. Development of biological skin-inspired highly sensitive, multi-functional artificial electronic skin

- Design and fabrication of skin microstructure inspired tactile sensor
- Property analysis and development of highly sensitive, wide-range, static/dynamic hierarchical structure pressure sensor


Static/dynamic pressure & temperature sensitive artificial electronic skin based on biological skin-inspired PVDF/rGO composite material



Highly sensitive, multi-functional artificial electronic skin based on skin-inspired CNT/PDMS composite material


Topic 4. Device integration and development of wearable sensor platform based on interconnection technology

- Development of interconnection technology between devices on stretchable substrate by printing silver precursor onto block copolymer film


Interconnection and integration of devices based on printing technology


- Development of highly transparent, highly stretchable, low roughness electrode material by inducing buckling in 1-D nanomaterial itself


Highly transparent, highly conductive, stretchable composite material electrode based on in-plane buckling of AgNW


- Fabrication of bio-inspired serpentine structure AgNW composite electrode by using selective curing of hydrogel on UV light


Bio-inspired serpentine structure hydrogel-AgNW composite material


Topic 5. Development of wireless-driven bio sensor platform for smart lens

- Applying glucose sensor or intraocular pressure sensor to smart lens
- Researching real-time measurement of glucose concentration and intraocular pressure by fabricating highly transparent, highly stretchable biosensor that can be repeatedly used in fluid on flexible substrate
- Development of healthcare platform by integrating microchip for wireless charge and communication on stretchable substrate with the help of stretchable battery that will be developed in our research team


Clinic system based on smart lens


| Expected Contribution

- Technologies of wearable sensor platform ; Printing based stretchable circuit, stretchable transparent circuit, stretchable film-type battery, wireless charge by transparent electrode, short-distance wireless communication microchip can be starting point of future wearable devices and electronic skin
- Establishment of new semiconductor technology by developing and expanding new concept of 3-D printed semiconductor device & circuit
- Platform designing technology for using stretchable devices practically is must-needed part in development of stretchable device technology
- Stretchable battery is a power supplying device that can be applied in flexible and bio-compatible device. It can be applied in most of the portable wearable devices so it is highly valuable technology
- Unlike conventional sensor devices that is realized by integration of sensors that detect various physical stimulus, the sensor that we propose in this project can distinguish & detect various stimulus by different signal processing with single material. With this advantage, we can simplify fabrication process and decrease the thickness and size of sensor.
- Expecting realization of real-time consecutive diagnosis system for various diseases by using biosensor for smart contact lens.

| Representative Research Achievement

1.박수진, 송우진, 배소현, 정운룡, 송준혁-전기화학소자용 전극, 이의 제조 방법, 및 이를 포함하는 전기화학소자(10-2016-0042880)
2. H. Lee, D. Um, Y. Lee, S. Lim, H. Kim, H. Ko, Adv. Mater., 2016, 28, 7457
3. S. Kang, T. Kim, S. Cho, Y. Lee, A. Choe, B. Walker, S. Ko, J. Y. Kim, H. Ko, Nano Lett., 2015, 15, 7933
4. J. Kwon, Y. Takeda, K. Fukuda, K. Cho, S. Tokito, S. Jung, Adv. Electron. Mater., 2016, 2, 1600046
5. J. Kwon, S. Kyung, S. Yoon, J. Kim, S. Jung, Adv. Sci., 2016, 3, 1500439