• 한국염색가공학회지
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• 제30권1호
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• pp.20-28
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• 2018

The near infrared ray camouflage fabric has a near infrared ray reluctance similar to the surrounding environment and has a camouflage effect on the surrounding environment. Synthetic fibers used in military uniforms are difficult to have gastrointestinal function as general commercial dyes, unlike cellulose fibers, which use some commercial vat dyes to impart infrared gastrointestinal function. In this study, we optimized the adsorption pH, temperature and time for NIR dye application for polyester fabrics, and established the optimum concentration for the evaluation of adsorption build-up characteristics. In addition, it is difficult to adsorb it since the polyester material has a dense crystal structure and the NIR dye is bulky. Therefore, a swelling agent used for dyeing meta-aramid fibers with high Tg and high crystallinity was introduced as a separate preparation to increase the affinity to polyester, which is a hydrophobic fiber, to thereby obtain an excellent adsorption rate. As a result of comparing before and after using swelling agent, the adsorption rate difference was 10 times or more when compared with before.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.118.1-118.1
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• 2011

The dye-sensitized solar cell (DSSC) is a device for the conversion of visible light into electricity, based on the sensitization of wide bandgap semiconductors. The performance of the cell mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the anchorage of the dye to the surface of TiO2 are important parameters determining the efficiency of the cell. Generally, transition metal coordination compounds(ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense charge-transfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects. Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, organic dyes can be used for the same purpose with an acceptable efficiency. The advantages of organic dyes include their availability and low cost. We designed and synthesized a series of organic sensitizers containing long wavelength absorption-chromophores for the dye sensitized solar cell. The DSSC composed of Blue-chromophores for the sensitization absorbed long wavelength region which is different also applied into the dye-cocktail (mixing) system. The photovoltaic property of DSSCs organic long wavelength absorption-chromophores were measured and evaluated by comparison with that of individual chromophores.

• KSBB Journal
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• 제27권5호
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• pp.295-300
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• 2012

Matured dendritic cells (DCs) begin migration with their release from the bone marrow (BM) into the blood and subsequent traffic into peripheral lymphoid and non-lymphoid tissues. Throughout this long movement, migrating DCs must apply specialized skills to reach their target destination. Non-invasive in vivo cell-tracking techniques are necessary to advance immune cell-based therapies. In this study, we used a DiD cell-tracking solution for in vivo dendritic cell tracking in naive mice. We tracked DiD (non-invasive fluorescence dye)-labeled mature dendritic cells using the Near Infrared (NIR) imaging system in normal mice. We examined the immunophenotype of DiD-labeled cells compared with non-labelled mature DCs, and obtained time-serial images of NIR-DC trafficking after mouse footpad injection. In conclusion, we confirmed that DiD-labeled DCs migrated into the popliteal lymph node 24 h after the footpad injection. Here, these data suggested that the cell tracking system with the stable fluorescence dye DiD was useful as a cell tracking tool to advance dendritic cell-based immunotherapy.

• Bulletin of the Korean Chemical Society
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• 제34권10호
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• pp.2937-2941
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• 2013

Fluorescence imaging is considered as one of the most powerful techniques for monitoring biomolecule activities in living systems. Near-infrared (NIR) light is advantageous for minimum photodamage, deep tissue penetration, and minimum background autofluorescence interference. Herein, we have developed a new NIR fluorescent dye, namely, RB-1, based on the Rhodamine B scaffold. RB-1 exhibits excellent photophysical properties including large absorption extinction coefficients, high fluorescence quantum yields, and high photostability. In particular, RB-1 displays both absorption and emission in the NIR region of the "biological window" (650-900 nm) for imaging in biological samples. RB-1 shows absorption maximum at 614 nm (500-725 nm) and emission maximum at 712 nm (650-825 nm) in ethanol, which is superior to those of traditional rhodamine B in the selected spectral region. Furthermore, applications of RB-1 for fluorescence imaging in living cells and small animals were investigated using confocal fluorescence microscopy and in vivo imaging system with a high signal-to-noise ratio (SNR = 10.1).

• 한국전기전자재료학회논문지
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• 제25권2호
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• pp.140-146
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• 2012

A variety of dyes are commercially available today, there is an ongoing need for new chromophoric systems and low-band-gap materials. For example, near-infrared (NIR) emission has received increased attention for applications in bioassays and medicine while NIR absorption is demanded for laser-welding of plastics or efficient blocking of heat rays. Most of the commercially available NIR materials are not suitable for such purposes owing to their insufficient stability. We have developed a novel NIR-absorbing polyaromatic dye. By extending the system of perylenebis(dicarboximide)s along the molecular long axis, we have obtained the higher homologue pentarylenebis(dicarboximide). We have tried to introduce imide functional group to pentarylene in order to increase chemical and thermal stability.

• 한국축산식품학회지
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• 제28권1호
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• pp.63-68
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• 2008

본 연구에서는 근적외선 분광광도계를 이용하여 원유의 체세포수 측정에 필요한 최적의 색소를 선정하기 위하여 eosin-Y, methyl red, methylen blue, resazurin 및 amido black 10B등의 5가지 색소를 0.01%첨가 후 근적외선 분광광도계를 이용하여 400-2,500 nm 영역에서 측청하였으며, PLS(partial least squar)분석 결과는 다음과 같다. 교정부 모델에서의 상관도는 raw milk 0.78, eosin-Y 0.65, methyl red 0.63, methylen blue 0.65, resazurin 0.98 그리고 amido black 10B는 0.99 였다. 또한, 검증부 모델에서의 상관도는 raw milk 0.49, eosin-Y 0.21, methyl red 0.36, methylen blue 0.47, resazurin 0.95 그리고 amido black 10B는 0.98 였다. 위 결과를 종합해 보면, amido black 10B를 첨가한 경우 검증부 모델의 상관도는 0.98, 검증부 오차(SEP)는 0.09로 가장 우수한 결과를 보였다.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제39차 학술발표회
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• pp.131-132
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• 2008

Several squarylium dyes, derived from benzothiazole and indoles, were synthesized as a potential NIR dyes with absorption in the 700-900 nm region. These chromophores were induced much more bathochromic shift in the absorption maximum of the compound relative to the neutral parent squarylium dyes which we were described before. The squaryliums offer a convenient way of linking the dye to functional substrates and may be an advantage to be potential chromophores for NIR-absorbing, NIR-Cut-off filter, PDT(Photo Dynamic Therapy) materials.

• Agricultural and Biosystems Engineering
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• 제1권1호
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• pp.16-21
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• 2000

Measurement of spray deposit is necessary for evaluation of a chemical application technology. However it is not easy and time consuming. A simple method for measuring the deposition amount of spray using a tracer and a spectrophotometer was developed. Various materials were tested to determine an adequate tracer. Food dye was selected as a tracer, because it was cheep and easily treatable. Using NIRS(Near Infrared Reflection Spectrophotometer), a regression curves between maximum absorbance of a solution and concentration of the tracer were obtained. Yellow food dye solution showed a peak of spectrum at 452 nm, and absorbance of peak showed a tendency to increase as concentration increased. Green or pink food dye were tested and judged to be good tracers. However, tracer concentration should not exceed certain limits in order to measure maximum absorption. Using spraying liquid with known tracer concentration and known amount of washing liquid, spray deposit amount on real targets on leaves could be estimated at less than 13% error level.

• 복식문화연구
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• 제10권4호
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• pp.433-440
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• 2002

Natural gardenia and Japanese pagoda tree have been known as them of the most widely used yellow vegetable dyes. Cotton and silk fabrics(KS K 0905) were chosen as specimens. Those were dyed with natural gardenia and Japanese pagoda tree. The conditions of dyeing were varied according to the kinds of mordants, using mordants or not and the concentrations of the natural dyes. Sn, Al, Fe and Cu were chosen for the mordants. 5%(owf), 10%(owf), 15%(owf) and 20%(owf) were used as for the concentration of the natural dyes. The color differences were measured by the Spectrometer(UV-VIS-NIR) before and after dyeing. The results are as follows: 1. Deeper colors were proportionately shown up to the concentration of the natural dye. 2. Silk was shown the higher dye affinity than the cotton at the same concentration of the dye. 3. The color difference between the Sn-mordanted specimens and the Al-mordanted specimens were significant. When the concentration of the dye increased, the colors got darker, specially in b* value. 4. The color difference between the Fe-mordanted specimens and the Cu-mordanted specimens were significant in L* value and b* value. 5. The deeper or lighter yellow were controllable under the concentration of the natural dye and the mordants. 6. The most effective and the economic concentration of the natural dye was 10% owf through the experiments.

• 공업화학
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• 제34권3호
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• pp.207-212
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• 2023

근적외선 흡수 염료는 전통적으로 정보 기록 및 정보 표시 분야에 사용되었을 뿐만 아니라 최근 광학 필터, 바이오, 에너지 저장 및 변환, 코팅 첨가제 등 다양한 응용 분야에 적용되고 있다. 핸드폰이나 디지털 카메라에 사용되는 이미지 센서는 근적외선 영역에서도 감도를 나타내기 때문에 보다 선명한 이미지를 구현하기 위해 근적외선 광학필터가 필수적이다. 에너지 저장 및 변환이 중요해짐에 따라 투명 태양 전지 분야에서는 근적외선 영역까지 흡수 영역을 확장할 수 있도록 다양한 근적외선 흡수 소재가 개발되고 있으며, 이를 이용해 소자 효율을 향상시키는 연구가 진행되고 있다. 미래 모빌리티 기술로 많은 관심을 받고 있는 자기치유 코팅 시스템에 광-열 효과를 갖는 근적외선 흡수 염료가 도입되어 보다 효율적인 자기치유 성능을 구현하는 연구들도 보고되고 있다. 본 총설에서는 대표적인 근적외선 흡수 염료들의 화학 구조들을 소개하고, 근적외선 흡수 염료들을 기반으로 한 최신 응용 연구 동향에 대해 다뤄보고자 한다.