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Lab. of Energy Conversion & Storage Materials

Prof. Kwang-Beom Kim’s research group is focusing on energy storage devices. Recently energy storage devices are widely used to power not only consumer devices (smart phones, laptops, tablets, etc) also Electrical Vehicles. To improve the storage capability and high performance of devices, it is necessary to research on electrode material itself. To do so, Kim’s research group takes nano-structuring strategy to shorten the diffusion length and surface modification strategy using promising materials such as Graphene and CNT to improve the electrical conductivity.

a new tip array architecture

Professor Wooyoung Shim’s group have developed a new tip array architecture aligning as many as 4,750 ultra sharp Silicon tips on a spring-like elastomer layer surface over an area of one square centimeter. The elastomeric backing significantly reduces the cost of fabrication because it circumvents the necessity for micomachined cantilevers, and enables a levelling protocol without requiring a complex feed back scheme. The Silicon tips prepared by a self sharpening wet etching protocol, have an average diameter of 22±3nm. The pitch of a tip array is set between 100~200μm, corresponding to tip densities of 10,000cm-2 ~2,500cm-2. The density can be as high as 110,000cm-2. The ability to generate arbitrary patterns with HSL tip arrays was evaluated by reproducing a bitmap repr...

Nanoscale patterning of complex magnetic nanostructures by reduction with low-energy protons

Professor Jongill Hong’s group developed a nanoscale nondestructive patterning technique using low-energy proton irradiation. Low-energy proton irradiation was applied to pattern an array of metallic, ferromagnetic nano islands through the local phase transformation of an oxidic, paramagnetic phase in a complex superlattice composed of repetitions of an oxidic and metallic layer. The irradiation inflicted minimal damage on the structure, resulting in the absence of unwanted defects and side effects. This technique has a central role in the development of new electronic, optical and magnetic devices and systems. Nature Nanotechnology, 7, 567-571 (2012). ACS Nano, 8, 4698-4704 (2014).

Meterials for and from Biology towards Intelligent NanoBiomaterials

Prof. Yong-beom Lim’s group is interested in developing self-assembled biological nanostructures and biomaterials, combining in research of the principles of chemistry, biology, physics, medicine, materials science, and importantly the inspiration from nature. Lim’s group intends to develop peptide-based artificial bionanostructures that can mimic or even have enhanced functional properties over the bionanostructures of biological origin. Moreover, we expect that artificial bionanostructures can be designed to have properties that are unprecedented in nature. Since the major driving force that underlies the formation of bionanostructures is a noncovalent self-assembly process, elaborately designed synthetic self-assembly building blocks should be one of the most suitable candid...

developed diverse highly functional nanomaterials based on solution processing.

Prof. Jooho Moon’s group have developed diverse highly functional nanomaterials based on solution processing. Detailed application areas include the smart inks for ink-jet printing, electronic and energy conversion devices, such as transparent electrodes, thin film transistors (TFTs), solar cells, solid oxide fuel cells (SOFCs) and lithium ion secondary batteries. The development of high quality solution processed materials suggests the potential for realization of future technologies such as stretchable electronics and environmentally-friendly clean energy society.

Journal of Materials Chemistry C

Prof. Myeong-kyu Lee’s group developed nanostructured TiO2 diffraction grating fabricated via imprinting combined with TiCl4 treatment. A thin TiO2 film spin-coated on a glass substrate was patterned by imprinting and this patterned layer was TiCl4-treated with a higher concentration than for a thicker over-coated TiO2 film. Due to the refractive index difference between the two layers, the incident light could be strongly diffracted. This method has potential applications in TiO2-based photovoltaic and photocatalysis devices.

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