Article
Chemistry, Multidisciplinary
Pai Liu, Yajun Lou, Shihao Ding, Wenda Zhang, Zhenghui Wu, Hongcheng Yang, Bing Xu, Kai Wang, Xiao Wei Sun
Summary: InP quantum dots with engineered core-shell structures achieved high PLQY and narrow emission spectra, setting a record for PLQY. The residue halogen atoms as inorganic ligands on the QD surface prevent further oxidation, leading to ultra-long operational lifetimes for the InP QDs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Paulina Jaimes, Tsumugi Miyashita, Tian Qiao, Kefu Wang, Ming Lee Tang
Summary: In this study, an inverse Type-I heterostructure with an inner InP shell was used for triplet-triplet annihilation-based photon upconversion. The addition of a ZnS shell on ZnSe/InP core/shell particles increased the photoluminescence quantum yield and transmitter triplet lifetime, while decreasing the rate of triplet energy transfer. The photon upconversion quantum yield of the ZnSe/InP/ZnS nanocrystals was found to be around 4.0%, suggesting their potential for converting near-infrared photons to visible light.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Paulina Jaimes, Tsumugi Miyashita, Tian Qiao, Kefu Wang, Ming Lee Tang
Summary: In this work, nanocrystals with an inner InP shell were used for triplet-triplet annihilation-based photon upconversion. The InP-based nanocrystals are earth-abundant and can be synthetically tuned to absorb in the NIR window. A two monolayer ZnS shell was used to passivate surface defects and improve the photoluminescence quantum yield of the InP nanocrystals. The ZnSe/InP/ZnS nanocrystals showed promising results in photon upconversion and can potentially convert NIR photons to visible light.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Haiyang Li, Wenjing Zhang, Yangyang Bian, Tae Kyu Ahn, Huaibin Shen, Botao Ji
Summary: A new method using inorganic salt ZnF2 instead of hydrofluoric acid to synthesize InP/ZnSe/ZnS core/shell/shell quantum dots is proposed in this study. The resulting quantum dots show higher photoluminescence efficiency and thermal stability, and can achieve high brightness emission in large sizes.
Article
Chemistry, Physical
Iurii Alekseevich Babkin, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, Christian Clasen
Summary: Quantum dots (QDs) are semiconductor nanocrystals used in optoelectronic applications. Most modern QDs are based on toxic metals and do not comply with EU regulations. However, there are promising developments in safer QD alternatives based on elements from the III-V group. This study focuses on encapsulating InP-based QDs in polymer microbeads for improved photostability.
Article
Chemistry, Multidisciplinary
Jumi Park, Taehee Kim, Dongho Kim
Summary: Surface passivation is crucial for preventing oxidation and improving the emission properties of nanocrystal quantum dots (QDs). Recent studies have revealed the critical role of surface ligands in determining the performance of InP/ZnSe/ZnS QD-LEDs. The length of the ligand chain influences charge injection and inter-QD energy transfer dynamics, shedding new light on the importance of surface ligands for QD-LED applications.
Article
Nanoscience & Nanotechnology
O. Kulakovich, L. Gurinovich, Hui Li, A. Ramanenka, L. Trotsiuk, A. Muravitskaya, Jing Wei, Hongbo Li, N. Matveevskaya, D. Guzatov, S. Gaponenko
Summary: The study reports the impact of gold and silver plasmonic films on the photoluminescence and photostability of InP/ZnSe/ZnSeS/ZnS nanocrystals. Gold enhances photostability by reducing exciton lifetime, while silver reduces photostability without affecting photoluminescence intensity. Adjusting excitation wavelength and using a polyelectrolyte spacer can enhance luminescence intensity.
Article
Nanoscience & Nanotechnology
Liangliang Zhou, Bin Yu, Lilin Huang, Huiqun Cao, Danying Lin, Yingying Jing, Faiz Wali, Junle Qu
Summary: In this study, a nonblinking core-multishell InP/ZnSe/ZnS quantum dot was synthesized using a hydrofluoric acid etching passivation method. The nonblinking quantum dot exhibited high fluorescence efficiency, good photostability, and high targeting. These nonblinking quantum dots can be used for long-term super-resolution visualization of subcellular dynamics.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jumi Park, Yu-Ho Won, Yongseok Han, Hyun-Mi Kim, Eunjoo Jang, Dongho Kim
Summary: Isotropic InP/ZnSe/ZnS quantum dots prepared at high reaction temperature show improved photoluminescence quantum yield and suppressed hot hole trapping compared to anisotropic counterparts, highlighting the importance of understanding the correlation between QD shapes and hot carrier dynamics.
Article
Materials Science, Multidisciplinary
Liming Wei, Jinyu Ye, Xiongtu Zhou, Tailiang Guo, Chunfeng Ren, Qun Yan, Yongai Zhang, Chaoxing Wu
Summary: Indium phosphide (InP) Quantum dots (QDs) are a promising alternative to cadmium-based QDs due to their heavy metal-free and tunable luminescence. However, the photoluminescence performances of InP QDs, especially using the aminophosphine based synthesis method, still need improvement. In this work, a one-pot synthesis route of InP/ZnS red QDs based on tris(dimethylamino)phosphine (DMP) phosphorus precursor is presented. The addition of ZnF2 significantly improves the photoluminescence quantum yield (PL QY) of both InP and InP/ZnS QDs. The PL QY of InP/ZnS QDs is increased by 32.7% compared to those synthesized without ZnF2 treatment.
Article
Chemistry, Physical
Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Ruiqing Ma, David F. Kelley, Anne Myers Kelley
Summary: Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals were obtained at different excitation wavelengths, revealing differences in phonon features attributed to various stoichiometries of the structures. The presence of excess indium in the ZnSe shell was found to influence the Raman intensities and frequency distributions, supporting previous assignments of hole trapping at indium defects in the shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: This study compares the ultrafast carrier dynamics in InP/ZnSe/ZnS core/shell/shell quantum dots (CSS-QDs) and InP/ZnS core/shell QDs (CS-QDs), revealing the impact of the ZnSe midshell on carrier dynamics. The results show that the ZnSe midshell enhances electron delocalization, prolongs the in-band relaxation time of electrons and holes, and reduces defect emissions. Additionally, the ZnSe midshell leads to an increased density of higher-energy hole states, which may decrease the probability of Auger recombination.
Article
Chemistry, Physical
Anh T. Nguyen, Ilan Jen-La Plante, Christian Ippen, Ruiqing Ma, David F. Kelley
Summary: Time-resolved photoluminescence and transient absorption spectroscopy were used to study hole relaxation dynamics in high-quality InP/ZnSe/ZnS quantum dots. Hole relaxation rates varied with In/P ratio, emission wavelength, and excess indium content. Slow hole relaxation in red-emitting QDs was attributed to transient population of indium-based traps in the ZnSe shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Akihito Okamoto, Haruki Bai, Shintaro Toda, Maowei Huang, Hirotake Kajii, Kentaro Kawai, Hirohiko Murakami
Summary: The effect of ZnSe thickness on the properties of green-emitting InP/ZnSe/ZnS QDs was investigated. It was found that an optimum thickness of 1.2 nm for the ZnSe intermediate shell resulted in the narrowest full width at half maximum (FWHM) and highest photoluminescence quantum yield (PLQY). Excessive or insufficient ZnSe thickness broadened FWHM and decreased PLQY.
Article
Chemistry, Multidisciplinary
Peter Reiss, Ranjana Yadav, Yongju Kwon, Christine Saint-Pierre, Wai Li Ling
Summary: Nonpyrophoric amines phosphines react with indium(III) halides in the presence of zinc chloride to synthesize colloidal indium phosphide (InP) quantum dots. However, the required P/In ratio of 4:1 makes it challenging to prepare large-sized and near-infrared absorbing/emitting InP QDs using this method. To overcome this, a synthetic approach using indium(I) halide as both the indium source and reducing agent for aminophosphine is introduced. This zinc-free method produces tetrahedral InP QDs with an edge length >10 nm and narrow size distribution.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Microbiology
Yeong Jun Kim, Yuri Kim, Abhishek Kumar, Chan Woo Kim, Zsolt Toth, Nam Hyuk Cho, Hye-Ra Lee
Summary: KSHV latent nuclear antigen interacts with cellular ubiquitin E3 ligase FBW7, stabilizing and increasing MCL-1 protein expression, inhibiting apoptosis in PEL cells. This suggests MCL-1 could be a potential drug target for KSHV-associated PEL.
Article
Food Science & Technology
Hae Jin Park, Su Jin Choi, Yuri Kim, Mi Sook Cho, Yu-Ri Kim, Ji Eun Oh
Summary: This study investigated the mealtime behaviors and food preferences of students with ASD, categorizing them into three clusters based on their behavior. Significant differences were found in age and food preference among different clusters, emphasizing the need for tailored nutrition education for ASD students.
Article
Chemistry, Multidisciplinary
Ramar Thangam, Myeong Soo Kim, Gunhyu Bae, Yuri Kim, Nayeon Kang, Sungkyu Lee, Hee Joon Jung, Jinhyeok Jang, Hyojun Choi, Na Li, Minjin Kim, Sangwoo Park, Seong Yeol Kim, Thomas Myeongseok Koo, Hong En Fu, Yoo Sang Jeon, Andreja Ambriovic-Ristov, Jae-Jun Song, Soo Young Kim, Steve Park, Qiang Wei, Changhyun Ko, Ki-Bum Lee, Ramasamy Paulmurugan, Young Keun Kim, Heemin Kang
Summary: Designing materials with remote switchability of decorated nanostructures can promote macrophage adhesion-regulated M2 polarization while suppressing M1 polarization, thereby facilitating tissue-healing responses.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Sunhong Min, Min Jun Ko, Hee Joon Jung, Wonsik Kim, Seong-Beom Han, Yuri Kim, Gunhyu Bae, Sungkyu Lee, Ramar Thangam, Hyojun Choi, Na Li, Jeong Eun Shin, Yoo Sang Jeon, Hyeon Su Park, Yu Jin Kim, Uday Kumar Sukumar, Jae-Jun Song, Seung-Keun Park, Seung-Ho Yu, Yun Chan Kang, Ki-Bum Lee, Qiang Wei, Dong-Hwee Kim, Seung Min Han, Ramasamy Paulmurugan, Young Keun Kim, Heemin Kang
Summary: This study demonstrates the remote control of nanostructure changes in ligand-presenting nanocoils to regulate cellular adhesion by cyclic stretching and shrinking. It shows promising potential for regulating mechanosensing-mediated differentiation of stem cells in vivo.
ADVANCED MATERIALS
(2021)
Article
Infectious Diseases
Seokin Kang, Yuri Kim, Ji Yong Ahn, Hwoon-Yong Jung, Nayoung Kim, Hee Kyong Na, Jeong Hoon Lee, Kee Wook Jung, Do Hoon Kim, Kee Don Choi, Ho June Song, Gin Hyug Lee
Summary: This study compared susceptibility-guided therapy (SGT) with empirical therapy (ET) in first-line treatment for Helicobacter pylori infection. It found that SGT significantly improved eradication rates in triple therapy (TT) and sequential therapy (SET) compared to ET.
Article
Infectious Diseases
Shinhye Cheon, Uni Park, Hyoree Park, Yuri Kim, Yen Thi Hai Nguyen, Abdimadiyeva Aigerim, Ji-Young Rhee, Jae-Phil Choi, Wan Beom Park, Sang Won Park, Yeonjae Kim, Dong-Gyun Lim, Jeong-Sun Yang, Joo-Yeon Lee, Yeon-Sook Kim, Nam-Hyuk Cho
Summary: The study found that the seropositivity rate of recovered MERS patients persisted for a longer duration, while neutralizing antibody titres decreased more rapidly. Patients with severe pneumonia had higher seropositivity rates and longer duration of neutralizing antibody titres.
CLINICAL MICROBIOLOGY AND INFECTION
(2022)
Article
Medicine, General & Internal
Pyoeng Gyun Choe, Yuri Kim, Euijin Chang, Chang Kyung Kang, Nam Joong Kim, Nam-Hyuk Cho, Wan Beom Park, Myoung-don Oh
Summary: Neutralizing antibody responses to the delta variant were detectable in patients with severe disease, but at lower levels compared to the wild type. However, these responses were undetectable in asymptomatic individuals. Vaccination strategies for individuals with previous natural infection should be based on the severity of their previous infection.
JOURNAL OF KOREAN MEDICAL SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Seung-Wan Choi, Hyun-Min Kim, Suk-Young Yoon, Dae-Yeon Jo, Sun-Kyo Kim, Yuri Kim, Seong Min Park, Young-Ju Lee, Heesun Yang
Summary: In this research, high-quality indium phosphide quantum dots were synthesized using safer aminophosphine precursors, and the emissivity of red InP QDs was enhanced by adopting unconventional In precursor InBr3 instead of InCl3. Improvements in the emissivity of red InP QDs towards deeper, narrower spectra were achieved by thickening the ZnSe inner shell.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yuri Kim, Hee Joon Jung, Yunjung Lee, Sagang Koo, Ramar Thangam, Woo Young Jang, Seong Yeol Kim, Sangwoo Park, Sungkyu Lee, Gunhyu Bae, Kapil Dev Patel, Qiang Wei, Ki-Bum Lee, Ramasamy Paulmurugan, Woong Kyo Jeong, Taeghwan Hyeon, Dokyoon Kim, Heemin Kang
Summary: In this study, the modulation of receptor-ligand interactions in cells using magnetic nanoparticle aggregates is investigated. Manipulating the accessible ligand dispersity can either promote macrophage adhesion and healing or suppress it depending on the ligand accessibility. This study presents accessible ligand dispersity as a novel parameter that regulates receptor-ligand binding and polarization of macrophages.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nutrition & Dietetics
Jonghee Kim, Joanne F. Dorgan, Hyesook Kim, Oran Kwon, Yangha Kim, Yuri Kim, Kwang Suk Ko, Yoon Jung Park, Hyesook Park, Seungyoun Jung
Summary: The use of nutrition labels is associated with a lower risk of chronic kidney disease, especially in older adults.
Article
Multidisciplinary Sciences
Jihwan Chae, Kunil Kim, Yuri Kim, Gahyun Lim, Daeeun Kim, Hackjin Kim
Summary: Limited resources can modulate individuals' decisions in intergroup situations by affecting ingroup favoritism and fairness. Participants were more willing to accept proposals in the ingroup advantageous condition and in moderate inequality conditions. However, individuals showed marked differences in their preferences for ingroup favoritism or fairness.
SCIENTIFIC REPORTS
(2022)
Article
Immunology
Taeseob Lee, Yuri Kim, Hyun Je Kim, Na-Young Ha, Siyoung Lee, BumSik Chin, Nam-Hyuk Cho
Summary: By using single-cell RNA sequencing analysis, this study found that B-cell response and humoral immunity play an important role in the progression and severity of COVID-19. Severe cases showed a more robust and heterogeneous plasma cell response, with the emergence of an abnormal plasma cell subset. This subset exhibited higher inflammatory features and may be a critical driver of disease severity.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2022)
Article
Food Science & Technology
Yeri Kim, Hyejin Han, Yeonsoo Oh, Hakdong Shin, Gwoncheol Park, Sunghee Park, John A. Manthey, Yang Kim, Yuri Kim
Summary: The study found that supplementation with Reb A and NHDC can effectively reduce weight gain, food efficiency ratio, and fat mass. Additionally, gene expressions related to adipogenesis, lipogenesis, and lipolysis were reduced, while beta-oxidation related genes were upregulated in the liver. Furthermore, the supplementation also caused changes in the gut microbiota structure.
FOOD SCIENCE AND BIOTECHNOLOGY
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Yuri Kim, Chaeyeon Lee, Jihyun Choi, Seoyeon Oh, Seongbin Park
Summary: This research introduces a project on designing course materials for an introduction to programming using the functional programming language Clean. Clean is believed to be a better choice for students due to its simple syntax and smaller program size compared to procedural languages. Introducing Clean in the course allows for intuitive introduction of recursive examples, which helps students understand this important concept.
PROCEEDINGS OF THE 2023 CONFERENCE ON INNOVATION AND TECHNOLOGY IN COMPUTER SCIENCE EDUCATION, ITICSE 2023, VOL. 2
(2023)
Article
Chemistry, Multidisciplinary
Minki Kang, Na-Yoon Jang, Young-Jun Kim, Hyo-Jin Ro, Dabin Kim, Yuri Kim, Hyoung Taek Kim, Hye Mi Kwon, Jin-Hyun Ahn, Byung-Ok Choi, Nam-Hyuk Cho, Sang-Woo Kim
Summary: This study demonstrates a virus-blocking textile (VBT) that repulses SARS-CoV-2 by utilizing repulsive Coulomb force and triboelectric energy harvesting. The VBT can effectively block SARS-CoV-2 by 99.95% and reduce the presence of the virus within the textile by 13-fold.
CELL REPORTS PHYSICAL SCIENCE
(2022)
