J. Mater. Chem. B
The development of flexible and wearable healthcare devices facilitates a real-time monitoring of body activities as well as detecting various biosignals, which provided useful information to manage one's health condition for personal health monitoring.
ACS Nano
Inspired by skin structure and function, we fabricate hierarchical nanoporous and interlocked microridge structured polymers with gradient stiffness for spacer-free, ultrathin, and highly sensitive triboelectric sensors (TESs). The proposed design of hierarchical polymer architectures for the flexible and wearable TESs can find numerous applications in next-generation wearable electronics.
ACS Nano
Here, we demonstrate a flexible ferroelectric sensor with ultrahigh pressure sensitivity and linear response over an exceptionally broad pressure range based on the material and structural design of ferroelectric composites with a multilayer interlocked microdome geometry.
NPG Asia Materials
In this study, we present piezoresistive electronic skins with tunable force sensitivity and selectivity to multidirectional forces by engineering microstructure geometries (dome, pyramid, pillar). Depending on shape of microstructures, distinct variation in contact area and localized stress under multidirectional stresses (normal, shear, tensile, bending) provides different sensitivity, selectivity, response/relaxation time, and mechanical stability.
ACS Nano
Flexible, transparent, and force-sensitive touch screens using cross-aligned AgNW electrodes integrated with mechanochromic spiropyran–polydimethylsiloxane composite film. Our force-sensitive touch screens enable the precise monitoring of dynamic writings, tracing and drawing of underneath pictures, and perception of handwriting patterns with locally different writing forces.
Advanced Materials
By mimicking muscle actuation to control cavity-pressure-induced adhesion of octopus suckers, smart adhesive pads are developed in which the thermoresponsive actuation of a hydrogel layer on elastomeric microcavity pads enables excellent switchable adhesion in response to a thermal stimulus (maximum adhesive strength: 94 kPa, adhesion switching ratio: ≈293 for temperature change between 22 and 61 °C).

Functional Nanomaterials and Devices

Our research interests are centered on the development of functional nanomaterials and devices based on the micro- and nanostructures. We are interested in exploiting the fabrication strategies combining “bottom-up” assembly and “top-down” lithography to hierarchically organize organic and inorganic nanomaterials (carbon nanotubes, graphenes, nanowires, nanoparticles, …) on multiple length scales. We also seek to understand the fundamental physical properties of individual nanomaterials and the collective behavior of the organized micro- and nanostructures, which is central to the rational development of functional devices. Ultimately, these micro- and nanostructures may find use in electronics, optics, sensors, and biomedical devices.
Ko lab

News & Achievement

Congratulations for winning the Samsung Electronics sponsored 24th HumanTech Paper Award.

Posted on 14 Feb 2018
Jonghwa Park won a bronze award in material science division.

Congratulations for winning the Samsung Electronics sponsored 24th HumanTech Paper Award.

Posted on 14 Feb 2018
Minjeong Ha won a bronze award in material science division.  

Congratulations for Winning the Best Oral Presentation Award in 2017 Fall Polymeer Society of Korea

Posted on 16 Oct 2017
Minjeong Ha received the Best Oral Presentation Award in 2017 Fall Polymeer Society of Korea

Congratulations for winning the Outstanding Poster Paper Award in IMID 2016

Posted on 04 Oct 2016
Hochan Lee received the Outstanding Poster Paper Award in The 16th International Meeting on Informat

Congratulations for Winning the Best Oral Presentation Award in 2016 MRS-K Spring Meeting

Posted on 30 Jun 2016
Minjeong Ha received the Best Oral Presentation Award in 2016 Spring meeting of Materials Research S

Recent Publications

Journal publication: ACS Nano

Posted on 17 Apr 2018
Youngoh Lee, Jonghwa Park, Soowon Cho, Young-Eun Shin, Hochan Lee, Jinyoung Kim, Jinyoung Myoung,  S

Journal publication: NPG Asia Materials

Posted on 17 Apr 2018
Jonghwa Park, Jinyoung Kim, Jaehyung Hong, Hochan Lee, Youngoh Lee, Seungse Cho, Sung-Woo Kim, Jae J

Journal publication: ACS Nano

Posted on 17 Apr 2018
Minjeong Ha, Seongdong Lim, Soowon Cho, Youngoh Lee, Sangyun Na, Chunggi Baig,* and Hyunhyub Ko* “Sk

Journal publication: Nano Energy

Posted on 17 Apr 2018
Kyungtae Kim, Minjeong Ha, Byeongwook Choi, Se Hun Joo, Han Sol Kang, Ju Hyun Park, Bongjun Gu, Chan

Journal publications: Polymer Chemistry

Posted on 17 Apr 2018
J. I. Park, A. Choe, M. P. Kim, H. Ko, T. H. Lee, S. M. Noh, J. C. Kim and I. W. Cheong, “Water-adap


Position available

There are several openings for graduate students and researchers in the area of functional nanomaterials and devices. Feel free to contact Prof. Ko (e-mail: hyunhko@unist.ac.kr, tel: 052-217-2532) if you are interested.