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23 results on '"Yoo, Jounghyun"'

2. Photonic control of ligand nanospacing in self-assembly regulates stem cell fate

Author

Lee, Sungkyu, Yoo, Jounghyun, Bae, Gunhyu, Thangam, Ramar, Heo, Jeongyun, Park, Jung Yeon, Choi, Honghwan, Kim, Chowon, An, Jusung, Kim, Jungryun, Mun, Kwang Rok, Shin, Seungyong, Zhang, Kunyu, Zhao, Pengchao, Kim, Yuri, Kang, Nayeon, Han, Seong-Beom, Kim, Dahee, Yoon, Jiwon, Kang, Misun, Kim, Jihwan, Yang, Letao, Karamikamkar, Solmaz, Kim, Jinjoo, Zhu, Yangzhi, Najafabadi, Alireza Hassani, Song, Guosheng, Kim, Dong-Hwee, Lee, Ki-Bum, Oh, Soong Ju, Jung, Hyun-Do, Song, Hyun-Cheol, Jang, Woo Young, Bian, Liming, Chu, Zhiqin, Yoon, Juyoung, Kim, Jong Seung, Zhang, Yu Shrike, Kim, Yongju, Jang, Ho Seong, Kim, Sehoon, and Kang, Heemin

Published
2024
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8. Photoswitchable Microgels for Dynamic Macrophage Modulation (Adv. Mater. 49/2022)

Author

Kim, Yuri, primary, Thangam, Ramar, additional, Yoo, Jounghyun, additional, Heo, Jeongyun, additional, Park, Jung Yeon, additional, Kang, Nayeon, additional, Lee, Sungkyu, additional, Yoon, Jiwon, additional, Mun, Kwang Rok, additional, Kang, Misun, additional, Min, Sunhong, additional, Kim, Seong Yeol, additional, Son, Subin, additional, Kim, Jihwan, additional, Hong, Hyunsik, additional, Bae, Gunhyu, additional, Kim, Kanghyeon, additional, Lee, Sanghyeok, additional, Yang, Letao, additional, Lee, Ja Yeon, additional, Kim, Jinjoo, additional, Park, Steve, additional, Kim, Dong‐Hyun, additional, Lee, Ki‐Bum, additional, Jang, Woo Young, additional, Kim, Bong Hoon, additional, Paulmurugan, Ramasamy, additional, Cho, Seung‐Woo, additional, Song, Hyun‐Cheol, additional, Kang, Seok Ju, additional, Sun, Wujin, additional, Zhu, Yangzhi, additional, Lee, Junmin, additional, Kim, Han‐Jun, additional, Jang, Ho Seong, additional, Kim, Jong Seung, additional, Khademhosseini, Ali, additional, Kim, Yongju, additional, Kim, Sehoon, additional, and Kang, Heemin, additional

Published
2022
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11. Photoechogenic Inflatable Nanohybrids for Upconversion-Mediated Sonotheranostics

Author

Jeong, Keunsoo, primary, Kim, Dojin, additional, Kim, Hyun Jun, additional, Lee, Yong-Deok, additional, Yoo, Jounghyun, additional, Jang, Dohyub, additional, Lee, Seokyung, additional, Park, Hyeonjong, additional, Kim, Youngsun, additional, Singh, Ajay, additional, Ahn, Dong June, additional, Kim, Dong Ha, additional, Bang, Joona, additional, Kim, Jungahn, additional, Prasad, Paras N., additional, and Kim, Sehoon, additional

Published
2021
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12. Additional file 1 of Metal complexation-mediated stable and biocompatible nanoformulation of clinically approved near-infrared absorber for improved tumor targeting and photonic theranostics

Author

Lee, Yong-Deok, Shin, Hyeon Jeong, Yoo, Jounghyun, Kim, Gayoung, Kang, Min-Kyoung, Lee, Jae Jun, Bang, Joona, Yang, Jin-Kyoung, and Kim, Sehoon

Abstract

Additional file 1: Figure S1. FT-IR spectra of free ICG (black line) and ICG-Fe complex (red line). Figure S2. Fluorescence lifetime decay curves of free ICG and ICG-Fe NPs (100 ��M) dissolved in DMSO. Table S1. Elemental analysis performed by ICP-OES of free ICGand ICG-Fe NPs. Figure S3. In vivo fluorescence images of a HT-29 tumor-bearing mouse after intravenous injection ofcy5.5-labeled ICG-Fe NPs. Excitation (640 nm) and emission (710 nm) filters were used for the fluorescence images. The red dotted circles indicate a tumor region. Figure S4. Representative histological images of lung and kidney stained with haematoxylin and eosin (H&E). Scalebar: 100 ��m.Table S2. Effect of ICG-Fe NPs on liver function markers. Figure S5. Body weights of mice during14 day after intravenous injection of ICG-Fe NPs and PTT

Published
2021
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16. Photoluminescent and biodegradable porous silicon nanoparticles for biomedical imaging.

Author

Park, Yoonsang, Yoo, Jounghyun, Kang, Myoung-Hee, Kwon, Woosung, and Joo, Jinmyoung

Abstract

Porous silicon nanoparticles (PSiNPs) have attracted increasing interest as biomedical probes for drug delivery and imaging. In particular, a set of unique properties including biodegradability, intrinsic photoluminescence, and favorable mesoporous structure providing high drug loading allow PSiNPs to address current challenges of translational nanomedicine. In this review, the important features of PSiNPs considered as a biomedical imaging probe will be concisely discussed along with recent advances in fabrication and theranostic applications. Firstly, an overview of PSiNP fabrication with controllable geometry through top-down or bottom-up strategies is provided. Next, intrinsic photoluminescence, the key element allowing application of PSiNPs as an imaging agent, is highlighted with near-infrared emission and micro-second scale lifetime. Emerging technologies for biodegradable nanomedicine based on PSiNPs are then presented. Advances of PSiNPs for disease treaments including photodynamic and photothermal therapeutics are also discussed to open up potential translational medical strategies. In addition, the versatile surface chemistry and modification of PSiNPs in the context of biomedical applications are extensively discussed. Overall, the promising characteristics of PSiNPs encourage further exploration for biomedical research and translational medical platforms, particularly in biomedical imaging. [ABSTRACT FROM AUTHOR]

Published
2019
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22. Tailoring Nanocrystalline Metal–Organic Frameworks as Fluorescent Dye Carriers for Bioimaging

Author

Ryu, UnJin, Yoo, Jounghyun, Kwon, Woosung, and Choi, Kyung Min

Abstract

Challenges exist in taking advantage of dye molecules for reliable and reproducible molecular probes in biomedical applications. In this study, we show how to utilize the dye molecules for bioimaging within protective carriers of nanocrystalline metal–organic frameworks (nMOFs) particles. Specifically, Resorufin and Rhodamine-6G having different molecular sizes were encapsulated within close-fitting pores of nMOF-801 and nUiO-67 particles, respectively. The resulting nanocrystalline particles have high crystallinity, uniform size, and morphology and preserve enhanced photoluminescence properties with exceptional stabilities in biomedical environment. The samples are further functionalized with a targeting agent and successfully work for fluorescence imaging of FL83B (human hepatocyte cell) and HepG2 (human hepatocellular carcinoma) without cytotoxicity.

Published
2024
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23. Direct deposition of anatase TiO2 on thermally unstable gold nanobipyramid: Morphology-conserved plasmonic nanohybrid for combinational photothermal and photocatalytic cancer therapy

Author

Jang, Dohyub, Yu, Subin, Chung, Kyungwha, Yoo, Jounghyun, Marques Mota, Filipe, Wang, Jianfang, Ahn, Dong June, Kim, Sehoon, Kim, Dong Ha, Jang, Dohyub, Yu, Subin, Chung, Kyungwha, Yoo, Jounghyun, Marques Mota, Filipe, Wang, Jianfang, Ahn, Dong June, Kim, Sehoon, and Kim, Dong Ha

Abstract

Deposition of crystalline titanium dioxide (TiO2) on gold nanostructures has been considered as a promising strategy for near-infrared (NIR) light-activated photocatalysis. A typical route comprises pre-deposition of amorphous TiO2 on the gold surface and its ensuing crystallization by high-temperature annealing. Such condition, however, is not compatible with highly plasmonic but thermally unstable sharp-tipped gold nanostructures, causing structural disruption and plasmonic decline. Herein, we report a hybridization method excluding high-temperature annealing, i.e., direct deposition of anatase TiO2 onto sharp-tipped gold nanobipyramid (Au NBP/a-TiO2) with conserving their morphology without agglomeration via low-temperature hydrothermal reaction. In addition to keeping the plasmonic photothermal performance, Au NBP/a-TiO2 exhibits enhanced photocatalytic generation of reactive oxygen species in response to the NIR excitation, evidencing the efficient injection of hot electrons from the Au NBP to the anatase shell. In vitro and in vivo studies revealed that the efficient photocatalytic/photothermal responses of Au NBP/a-TiO2, along with dispersion stability in biological media and minimal toxicity, hold potential for synergistic photothermal and photodynamic therapy. We believe that the low-temperature synthetic method introduced here might offer a general way of crystalline deposition of TiO2 on a variety of gold nanostructures, broadening the spectrum of NIR-responsive photocatalytic hybrid nanostructures for biomedical applications.

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