1. Kor /
  2. Eng

  1. Kor /
  2. Eng

Major AchievementsFollowings are the major outstanding achievements of the SAIHST faculties

[방창현 교수/ 우수논문] Advanced Materials. 2017 Mar (Frontispiece)
No 52
Date 2017/07/14




방창현 교수

(SAIHST 의료기기산업학과)


Impact Factor ('16) = 19.791



2017 Jun;29(21). doi: 10.1002/adma.201606453. Epub 2017 Mar 29.



Microtopography-Guided Conductive Patterns of Liquid-Driven Graphene Nanoplatelet Networks for Stretchable and Skin-Conformal Sensor Array.

Youngjin Park, Jongwon Shim, Suyeon Jeong, Gi-Ra Yi, Heeyeop Chae, Jong Wook Bae, Sang Ouk Kim,* and Changhyun Pang*




Flexible thin-film sensors have been developed for practical uses in invasive or noninvasive cost-effective healthcare devices, which requires high sensitivity, stretchability, biocompatibility, skin/organ-conformity, and often transparency. Graphene nanoplatelets can be spontaneously assembled into transparent and conductive ultrathin coatings on micropatterned surfaces or planar substrates via a convective Marangoni force in a highly controlled manner. Based on this versatile graphene assembled film preparation, a thin, stretchable and skin-conformal sensor array (144 pixels) is fabricated having microtopography-guided, graphene-based, conductive patterns embedded without any complicated processes. The electrically controlled sensor array for mapping spatial distributions (144 pixels) shows high sensitivity (maximum gauge factor ≈1697), skin-like stretchability (<48%), high cyclic stability or durability (over 105 cycles), and the signal amplification (≈5.25 times) via structure-assisted intimate-contacts between the device and rough skin. Furthermore, given the thin-film programmable architecture and mechanical deformability of the sensor, a human skin-conformal sensor is demonstrated with a wireless transmitter for expeditious diagnosis of cardiovascular and cardiac illnesses, which is capable of monitoring various amplified pulse-waveforms and evolved into a mechanical/thermal-sensitive electric rubber-balloon and an electronic blood-vessel. The microtopography-guided and self-assembled conductive patterns offer highly promising methodology and tool for next-generation biomedical devices and various flexible/stretchable (wearable) devices.




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