ACS Nano
The conductivity-gradient multilayers allowed us to control the saturation behavior of resistance change by the gradual activation of current pathway from outer to inner layers and the difference between initial and saturation resistances, thus ensuring the superior linearity and ultrahigh sensitivity (3.8 × 105 kPa−1 ) for the pressure range of up to 100 kPa.
ACS Nano
We developed high-performance TE devices through the structural design of ferroelectric multilayers with alternating PVDF-TrFE and BTO NP layers for enhanced polarization and stress concentration effects.
Science Advances
In this work, we presented an artificial tongue that is fully inspired from the human sensing mechanism. The artificial tongue can be prepared by facile UV polymerization on a flexible substrate and exhibit extraordinary sensing capabilities, such as a wide sensing range and a low limit of detectable concentration and high selectivity from other tastes.
Advanced Materials
This study demonstrates that a hierarchical NP-MP architecture in porous mechanochromic composites can enhance both mechanochromic strain/stress sensitivity and stretchability.
Science Advances
Nanomembranes and nanowires build tiny, transparent loudspeakers and sensitive, voice-recognition microphones that attach to skin.
Advanced Materials
Improved performance in plasmonic organic solar cells (OSCs) and organic light-emitting diodes (OLEDs) via strong plasmon-coupling effects generated by aligned silver nanowire (AgNW) transparent electrodes decorated with core–shell silver–silica nanoparticles (Ag@SiO 2 NPs) is demonstrated.
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.
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 best post award in NanoKorea 2020

Posted on 16 Oct 2020
Jeonghee Yeom won the best poster award in Nano Korea 2020 the 18th International Nanotech Symposium

Congratulations for winning the best oral presentation award in 2018 Fall Polymer Society of Korea

Posted on 22 Oct 2018
Jeonghee Yeom won the best oral presentation award in 2018 Fall Polymer Society of Korea.  

Congratulations for winning the WISET-PSK Young Researcher Award in 2018 Fall Polymer Society Korea

Posted on 22 Oct 2018
Minjeong Ha won the WISET-PSK Young Researcher Award in 2018 Fall Polymer Society Korea.

Congratulations for winning the best poster presentation award in IUMRS-ICEM 2018

Posted on 01 Oct 2018
Seungyoung Park won the best poster presentation award in IUMRS-ICEM 2018.

Congratulations for winning the best Poster Paper Award in Nano Korea 2018

Posted on 17 Jul 2018
Ayoung Choe won the best poster award (gold medal) in Nano Korea 2018.

Recent Publications

Journal publication : Nanoscale Research Letters

Posted on 15 Feb 2021
Minsoo P. Kim, Doo-Seung Um, Young-Eun Shin and Hyunhyub Ko*, “High-Performance Triboelectric

Journal publication : Nano Energy

Posted on 03 Feb 2021
Minsoo P. Kim, Chang Won Ahn, Youngsu Lee, Kyoungho Kim, Jonghwa Park, and Hyunhyub Ko*, “Inte

Journal publication : ACS Nano

Posted on 01 Feb 2021
Youngoh Lee, Jinyoung Myoung, Soowon Cho, Jonghwa Park, Jinyoung Kim, Hochan Lee, Youngsu Lee, Seung

Journal publication: NPG Asia Materials

Posted on 29 Dec 2020
Yoon Ho Lee, Seungyoung Park, Yousang Won, Jungho Mun, Jae Hwan Ha, Jeong Hun Lee, Sang Hyuk Lee, Jo

Journal publication: Advanced Science

Posted on 24 Nov 2020
Seungse Cho, Dong-hee Kang, Hyejin Lee, Minsoo P. Kim, Saewon Kang, Ravi Shanker, and Hyunhyub Ko*,

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:, tel: 052-217-2532) if you are interested.