Ion-beam irradiation(IB) on HfO2 surface induced high-performance liquidcrystal(LC) driving at a 1-V threshold with vertical alignment of liquid crystals(LC). The high-k materials Atomic layer deposition was used to obtain LC orientation on ultra thin and high-quality films of HfO2 layers. To analyze surface morphological transition of HfO2 which can act as physic alignment effect of LC, atomic force micro scopy images are employed with various IB intensities. The contact angle was measured to elucidate the mechanism of vertical alignment of LC on HfO2 with IB irradiation. Contact angle measurements show the surface energy changes via IB intensity increasing.

The ion-beam irradiated lanthanum zinc oxide (LZO) films were conducted as liquid crystal (LC) alignment layer to achieve uniform and homogeneous alignment of LC molecules. Polarized optical microscopy and the pre-tilt angle measurements revealed the alignment characteristics of LC molecules on the LZO film surface. Physical characteristics of the LZO film surface were analyzed by field emission scanning electron microscope and atomic force microscopy. The strong ion-beam irradiation on the LZO film changed surface rougher than before and induced physical anisotropic characteristics. Chemical composition of the LZO film was investigated by X-ray photoelectron spectroscopy and it was revealed that the ion-beam irradiation induced the breakage of the metal-oxide bonds. Due to this, anisotropic dipole moment which related with van der Waals force between LC molecules and alignment layer was induced. Because of this, LC molecules were anchored to the LZO film surface to achieve uniform LC alignment. Collecting the capacitance-voltage curve, residual DC of the LC cell with the LZO films was measured and it was verified that the LC cell with the LZO film had a nearly zero residual DC. Therefore, the ion-beam irradiated LZO film is an efficient method as an LC alignment layer

Crosslinked ion exchange resin composite membranes were prepared by casting sulfonated polystyrene(SPS) solution with suspended ion exchange resin(crosslinked SPS) and crosslinker (trimethylolpropane ethoxylate triacrylate (TMPETA)) follow by gamma-ray irradiation. The physicochemical properties of the composite membranes were evaluated by measuring gel-fraction, ion exchange capacity, water-uptake and dimensional stability. We confirmed that the introduction of ion exchange resin and radiation crosslinking in the membranes improved the water uptake, dimensional stability and permselectivity.

In this study, enhanced cation exchange capacity of polystyrene (PS) electrospun fibers by electron beam irradiation was investigated. PS spinning solutions were prepared by dissolving 25 wt% PS in 75 wt% mixed solvents (dimethylacetamide (DMAc)/tetrahydrofuran (THF)) at the ratio of 33/67% v/v with divinylbenzene (DVB; 0, 1, 2 phr)　as crosslink agent. The PS electrospun fibers were carried out at doses of 0 (control), 100 and 200 kGy. The ion exchange capacity (IEC) of PS electrospun fibers depend on the DVB concentration and irradiation dose. The PS electrospun fiber with DVB 1 phr at dose of 150 kGy showed the maximum IEC of 4.670 mmol/g.

Nematic liquid crystal (NLC) alignment effects on SiOF layers via ion-beam(IB) irradiation for four types of incident energy were successfully studied. The effect of fluorine addition on silicon oxide film properties as a function of SiOF₄/O₂gas flow ration was investigated. The SiOF thin film exhibits good chemical and the thermal stability of the SiOF thin film were sustained as function of the NLC alignment until 200℃. Also, the response-time characteristics of aligned LCD based on SiOF film were studied.

Radiation technologies have been widely used in mutation breeding of crops. Although gamma-radiation has been predominantly applied in radiation breeding, ion beam irradiation is recently emerging as a methodology highly effective in induction of mutations that are useful for plant breeding. Therefore, we investigated the biological effects caused by irradiation of two types of ion beams, which were proton and ion beams, respectively, in pepper. In the evaluation of survival rate, LD50 values were between 300 and 350 Gy, 30 and 40 Gy in irradiation of proton and carbon beams, respectively, while LD50 for gamma-ray was determined to be between 50 and 100 Gy. Growth traits including shoot length, root length, and root width were also examined in pepper seedlings according to does of proton and carbon ion beams to estimate biological effectiveness of each radiation. The result was applied in the construction of pepper mutant population which will be used to develop pepper breeding materials containing novel characteristics.

유채(Brassica napus L.) '내한', '탐미', '한라' 등 3품종의 종자에 양성자 및 감마선을 0~2,000 Gy로 처리하여 조숙, 단간, 다수성 등 농경상 유용형질을 갖고 기름함량과 지방산 중 올레인산 함량이 높은 바이오디젤용 품종을 육성하고자 본 연구를 실시하였다. M5세대까지 세대를 진전시키고 특성조사를 실시하여 고정성이 높고 농경형질이 우수한 조숙 단간 1 계통, 조숙 1계통, 단간 2계통과 대화 1계통, 엽록소변이 1계통을 선발하

양성자와 감마선 조사한 추파형 유채 M2 세대의 화뢰의 소포자 배발생에 대해 조사하였다. 세 가지 유채품종 '한라', '내한'과 '탐미' 유채종자를 각각 400 Gy와 600 Gy의 양성자와 감마선으로 전처리 하였다. 일부 종의 양성자와 감마선 조사구에서 배발생이 증가되었고 대조구보다 높았다. 품종별로는 '내한'유채가 배발생 빈도가 가장 높았고 '탐미' 유채가 가장 낮았다. 드물게 배상체로부터 바로 소식물체가 형성되었고 대부분은 비정상적으로 multilobe가 형성되었다. 배상체로부터 식물체가 성공적으로 재분화 되었고 화분에 순화되었다