H
Hak-Joo Lee
Researcher at Korea University of Science and Technology
Publications - 216
Citations - 3713
Hak-Joo Lee is an academic researcher from Korea University of Science and Technology. The author has contributed to research in topics: Graphene & Layer (electronics). The author has an hindex of 26, co-authored 209 publications receiving 3096 citations. Previous affiliations of Hak-Joo Lee include Brown University & Korea Research Institute of Standards and Science.
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Graphene-based transparent strain sensor
TL;DR: Transparent strain sensors based on graphene were fabricated in a form of rosette on a flexible plastic or stretchable rubber substrate by using reactive ion etching and stamping techniques.
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Chemical vapor deposition-grown graphene: the thinnest solid lubricant.
Kwang-Seop Kim,Hee Jung Lee,Changgu Lee,Seoung-Ki Lee,Houk Jang,Jong Hyun Ahn,Jae-Hyun Kim,Hak-Joo Lee +7 more
TL;DR: Graphene films grown on Cu and Ni metal catalysts by chemical vapor deposition and transferred onto the SiO(2)/Si substrate effectively reduced the adhesion and friction forces, and multilayer graphene films that were a few nanometers thick had low coefficients of friction comparable to that of bulk graphite.
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Tensile testing of ultra-thin films on water surface
Jae-Han Kim,Adeel Nizami,Yun Hwangbo,Bongkyun Jang,Hak-Joo Lee,Chang-Su Woo,Seungmin Hyun,Taek-Soo Kim +7 more
TL;DR: Kim et al. as mentioned in this paper used the water surface as a nearly ideal underlying support for free-standing ultra-thin films and developed a novel tensile testing method for the precise measurement of mechanical properties of the films.
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Stretchable Active Matrix Inorganic Light-Emitting Diode Display Enabled by Overlay-Aligned Roll-Transfer Printing
Minwoo Choi,Bongkyun Jang,Wonho Lee,Seonwoo Lee,Tae Woong Kim,Hak-Joo Lee,Jae-Hyun Kim,Jong Hyun Ahn +7 more
TL;DR: In this article, an active matrix-type stretchable display is realized by overlay-aligned transfer of inorganic light-emitting diode (LED) and single-crystal Si thin film transistor (TFT) with roll processes.
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Fatigue life estimation of an engine rubber mount
TL;DR: In this paper, a load-controlled fatigue test was conducted on three-dimensional dumbbell specimens at different levels of mean load, and it was shown that the maximum Green-Lagrange strain and the maximum strain energy density were proper damage parameters, taking the mean load effects into account.