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Kim D, Lee H, Yun Y, Park J, Zhang X, Bae JH, Baang S. Analyzing Acceptor-like State Distribution of Solution-Processed Indium-Zinc-Oxide Semiconductor Depending on the In Concentration. Nanomaterials (Basel) 2023; 13:2165. [PMID: 37570484 PMCID: PMC10421299 DOI: 10.3390/nano13152165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/14/2023] [Accepted: 07/20/2023] [Indexed: 08/13/2023]
Abstract
Understanding the density of state (DOS) distribution in solution-processed indium-zinc-oxide (IZO) thin-film transistors (TFTs) is crucial for addressing electrical instability. This paper presents quantitative calculations of the acceptor-like state distribution of solution-processed IZO TFTs using thermal energy analysis. To extract the acceptor-like state distribution, the electrical characteristics of IZO TFTs with various In molarity ratios were analyzed with respect to temperature. An Arrhenius plot was used to determine electrical parameters such as the activation energy, flat band energy, and flat band voltage. Two calculation methods, the simplified charge approximation and the Meyer-Neldel (MN) rule-based carrier-surface potential field-effect analysis, were proposed to estimate the acceptor-like state distribution. The simplified charge approximation established the modeling of acceptor-like states using the charge-voltage relationship. The MN rule-based field-effect analysis validated the DOS distribution through the carrier-surface potential relationship. In addition, this study introduces practical and effective approaches for determining the DOS distribution of solution-processed IZO semiconductors based on the In molarity ratio. The profiles of the acceptor-like state distribution provide insights into the electrical behavior depending on the doping concentration of the solution-processed IZO semiconductors.
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Affiliation(s)
- Dongwook Kim
- School of Information Science, Hallym University, Chuncheon 24252, Republic of Korea; (D.K.); (H.L.); (J.P.)
| | - Hyeonju Lee
- School of Information Science, Hallym University, Chuncheon 24252, Republic of Korea; (D.K.); (H.L.); (J.P.)
| | - Youngjun Yun
- School of Nano Convergence Technology, Hallym University, Chuncheon 24252, Republic of Korea;
| | - Jaehoon Park
- School of Information Science, Hallym University, Chuncheon 24252, Republic of Korea; (D.K.); (H.L.); (J.P.)
- Department of Electronic Engineering, Hallym University, Chuncheon 24252, Republic of Korea
| | - Xue Zhang
- College of Ocean Science and Engineering, Shangdong University of Science and Technology, Qingdao 266590, China;
| | - Jin-Hyuk Bae
- School of Electronics Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sungkeun Baang
- School of Information Science, Hallym University, Chuncheon 24252, Republic of Korea; (D.K.); (H.L.); (J.P.)
- Department of Electronic Engineering, Hallym University, Chuncheon 24252, Republic of Korea
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2
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Kim TH, Zhou Z, Choi YS, Costanza V, Wang L, Bahng JH, Higdon NJ, Yun Y, Kang H, Kim S, Daraio C. Flexible biomimetic block copolymer composite for temperature and long-wave infrared sensing. Sci Adv 2023; 9:eade0423. [PMID: 36763652 PMCID: PMC9916982 DOI: 10.1126/sciadv.ade0423] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 01/09/2023] [Indexed: 06/18/2023]
Abstract
Biological compounds often provide clues to advance material designs. Replicating their molecular structure and functional motifs in artificial materials offers a blueprint for unprecedented functionalities. Here, we report a flexible biomimetic thermal sensing (BTS) polymer that is designed to emulate the ion transport dynamics of a plant cell wall component, pectin. Using a simple yet versatile synthetic procedure, we engineer the physicochemical properties of the polymer by inserting elastic fragments in a block copolymer architecture, making it flexible and stretchable. The thermal response of our flexible polymer outperforms current state-of-the-art temperature sensing materials, including vanadium oxide, by up to two orders of magnitude. Thermal sensors fabricated from these composites exhibit a sensitivity that exceeds 10 mK and operate stably between 15° and 55°C, even under repeated mechanical deformations. We demonstrate the use of our flexible BTS polymer in two-dimensional arrays for spatiotemporal temperature mapping and broadband infrared photodetection.
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Affiliation(s)
- Tae Hyun Kim
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Zhun Zhou
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Yeong Suk Choi
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, South Korea
| | - Vincenzo Costanza
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Linghui Wang
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Joong Hwan Bahng
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Nicholas J. Higdon
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Youngjun Yun
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, South Korea
| | - Hyunbum Kang
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, South Korea
| | - Sunghan Kim
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, South Korea
| | - Chiara Daraio
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
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3
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Yoo H, Kim E, Chung JW, Cho H, Jeong S, Kim H, Jang D, Kim H, Yoon J, Lee GH, Kang H, Kim JY, Yun Y, Yoon S, Hong Y. Silent Speech Recognition with Strain Sensors and Deep Learning Analysis of Directional Facial Muscle Movement. ACS Appl Mater Interfaces 2022; 14:54157-54169. [PMID: 36413961 DOI: 10.1021/acsami.2c14918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Silent communication based on biosignals from facial muscle requires accurate detection of its directional movement and thus optimally positioning minimum numbers of sensors for higher accuracy of speech recognition with a minimal person-to-person variation. So far, previous approaches based on electromyogram or pressure sensors are ineffective in detecting the directional movement of facial muscles. Therefore, in this study, high-performance strain sensors are used for separately detecting x- and y-axis strain. Directional strain distribution data of facial muscle is obtained by applying three-dimensional digital image correlation. Deep learning analysis is utilized for identifying optimal positions of directional strain sensors. The recognition system with four directional strain sensors conformably attached to the face shows silent vowel recognition with 85.24% accuracy and even 76.95% for completely nonobserved subjects. These results show that detection of the directional strain distribution at the optimal facial points will be the key enabling technology for highly accurate silent speech recognition.
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Affiliation(s)
- Hyunjun Yoo
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Eunji Kim
- Department of Electrical and Computer Engineering, Seoul National University, Seoul08826, Korea
| | - Jong Won Chung
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon16678, Korea
| | - Hyeon Cho
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Sujin Jeong
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Heeseung Kim
- Department of Electrical and Computer Engineering, Seoul National University, Seoul08826, Korea
| | - Dongju Jang
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Hayun Kim
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Jinsu Yoon
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
| | - Gae Hwang Lee
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon16678, Korea
| | - Hyunbum Kang
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon16678, Korea
| | - Joo-Young Kim
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon16678, Korea
| | - Youngjun Yun
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon16678, Korea
| | - Sungroh Yoon
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
- Interdisciplinary Program in Artificial Intelligence, Seoul National University, Seoul08826, Korea
| | - Yongtaek Hong
- Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul08826, Korea
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4
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Kim H, Yoon S, Yun Y, Hur M, Moon H. M222 Evaluation of commutability of external quality assessment material for accuracy based survey of lipid tests. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Kim H, Hur M, Kim S, Moon H, Yun Y. T248 Reference intervals for 10 platelet parameters on Mindray BC-6800 plus hematology analyzer. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Yoon S, Moon H, Yi A, Kim H, Chung H, Hur M, Yun Y, Yoo G. W071 Investigation of serial tests of quantiferon-tb gold in-tube and quantiferon-tb gold-plus in contacts to patients with active tuberculosis. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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7
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Lee GH, Kang H, Chung JW, Lee Y, Yoo H, Jeong S, Cho H, Kim JY, Kang SG, Jung JY, Hahm SG, Lee J, Jeong IJ, Park M, Park G, Yun IH, Kim JY, Hong Y, Yun Y, Kim SH, Choi BK. Stretchable PPG sensor with light polarization for physical activity-permissible monitoring. Sci Adv 2022; 8:eabm3622. [PMID: 35417230 PMCID: PMC9007514 DOI: 10.1126/sciadv.abm3622] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 02/24/2022] [Indexed: 05/26/2023]
Abstract
Skin-attachable sensors, which represent the ultimate form of wearable electronic devices that ensure conformal contact with skin, suffer from motion artifact limitations owing to relative changes in position between the sensor and skin during physical activities. In this study, a polarization-selective structure of a skin-conformable photoplethysmographic (PPG) sensor was developed to decrease the amount of scattered light from the epidermis, which is the main cause of motion artifacts. The motion artifacts were suppressed more than 10-fold in comparison with those of rigid sensors. The developed sensor-with two orthogonal polarizers-facilitated successful PPG signal monitoring during wrist angle movements corresponding to high levels of physical activity, enabling continuous monitoring of daily activities, even while exercising for personal health care.
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Affiliation(s)
- Gae Hwang Lee
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Hyunbum Kang
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Jong Won Chung
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Yeongjun Lee
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Hyunjun Yoo
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea
| | - Sujin Jeong
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea
| | - Hyeon Cho
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea
| | - Joo-Young Kim
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Sung-Gyu Kang
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Ji Young Jung
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Suk Gyu Hahm
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Jeahyuck Lee
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - In-Jo Jeong
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - Minho Park
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - Gunkuk Park
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - In Ho Yun
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - Justin Younghyun Kim
- Health H/W R&D Group, Communications Business, Samsung Electronics, Suwon 16677, Korea
| | - Yongtaek Hong
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Korea
| | - Youngjun Yun
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Sung-Han Kim
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Byoung Ki Choi
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
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8
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Liu D, Mun J, Chen G, Schuster NJ, Wang W, Zheng Y, Nikzad S, Lai JC, Wu Y, Zhong D, Lin Y, Lei Y, Chen Y, Park JI, Gam S, Chung JW, Yun Y, Tok JBH, Bao Z. Correction to "A Design Strategy for Intrinsically Stretchable High-Performance Polymer Semiconductors: Incorporating Conjugated Rigid Fused-Rings with Bulky Side Groups". J Am Chem Soc 2021; 143:15471. [PMID: 34494834 DOI: 10.1021/jacs.1c08917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Liu D, Mun J, Chen G, Schuster NJ, Wang W, Zheng Y, Nikzad S, Lai JC, Wu Y, Zhong D, Lin Y, Lei Y, Chen Y, Gam S, Chung JW, Yun Y, Tok JBH, Bao Z. A Design Strategy for Intrinsically Stretchable High-Performance Polymer Semiconductors: Incorporating Conjugated Rigid Fused-Rings with Bulky Side Groups. J Am Chem Soc 2021; 143:11679-11689. [PMID: 34284578 DOI: 10.1021/jacs.1c04984] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Strategies to improve stretchability of polymer semiconductors, such as introducing flexible conjugation-breakers or adding flexible blocks, usually result in degraded electrical properties. In this work, we propose a concept to address this limitation, by introducing conjugated rigid fused-rings with optimized bulky side groups and maintaining a conjugated polymer backbone. Specifically, we investigated two classes of rigid fused-ring systems, namely, benzene-substituted dibenzothiopheno[6,5-b:6',5'-f]thieno[3,2-b]thiophene (Ph-DBTTT) and indacenodithiophene (IDT) systems, and identified molecules displaying optimized electrical and mechanical properties. In the IDT system, the polymer PIDT-3T-OC12-10% showed promising electrical and mechanical properties. In fully stretchable transistors, the polymer PIDT-3T-OC12-10% showed a mobility of 0.27 cm2 V-1 s-1 at 75% strain and maintained its mobility after being subjected to hundreds of stretching-releasing cycles at 25% strain. Our results underscore the intimate correlation between chemical structures, mechanical properties, and charge carrier mobility for polymer semiconductors. Our described molecular design approach will help to expedite the next generation of intrinsically stretchable high-performance polymer semiconductors.
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Affiliation(s)
- Deyu Liu
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Jaewan Mun
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Gan Chen
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Nathaniel J Schuster
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Weichen Wang
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Yu Zheng
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Shayla Nikzad
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Jian-Cheng Lai
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Yilei Wu
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Donglai Zhong
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Yangju Lin
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Yusheng Lei
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Yuelang Chen
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Sangah Gam
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 16678, South Korea
| | - Jong Won Chung
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 16678, South Korea
| | - Youngjun Yun
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 16678, South Korea
| | - Jeffrey B-H Tok
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
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10
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Mun J, Ochiai Y, Wang W, Zheng Y, Zheng YQ, Wu HC, Matsuhisa N, Higashihara T, Tok JBH, Yun Y, Bao Z. A design strategy for high mobility stretchable polymer semiconductors. Nat Commun 2021; 12:3572. [PMID: 34117254 PMCID: PMC8196107 DOI: 10.1038/s41467-021-23798-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 05/14/2021] [Indexed: 01/02/2023] Open
Abstract
As a key component in stretchable electronics, semiconducting polymers have been widely studied. However, it remains challenging to achieve stretchable semiconducting polymers with high mobility and mechanical reversibility against repeated mechanical stress. Here, we report a simple and universal strategy to realize intrinsically stretchable semiconducting polymers with controlled multi-scale ordering to address this challenge. Specifically, incorporating two types of randomly distributed co-monomer units reduces overall crystallinity and longer-range orders while maintaining short-range ordered aggregates. The resulting polymers maintain high mobility while having much improved stretchability and mechanical reversibility compared with the regular polymer structure with only one type of co-monomer units. Interestingly, the crystalline microstructures are mostly retained even under strain, which may contribute to the improved robustness of our stretchable semiconductors. The proposed molecular design concept is observed to improve the mechanical properties of various p- and n-type conjugated polymers, thus showing the general applicability of our approach. Finally, fully stretchable transistors fabricated with our newly designed stretchable semiconductors exhibit the highest and most stable mobility retention capability under repeated strains of 1,000 cycles. Our general molecular engineering strategy offers a rapid way to develop high mobility stretchable semiconducting polymers. Designing intrinsically stretchable semiconducting polymers with suitable charge transport and mechanical properties required for stretchable electronic devices remains a challenge. Here, the authors report terpolymer-based semiconductors with intrinsically high stretchability and mobility.
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Affiliation(s)
- Jaewan Mun
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Yuto Ochiai
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.,Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata, Japan
| | - Weichen Wang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Yu Zheng
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Yu-Qing Zheng
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Hung-Chin Wu
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Naoji Matsuhisa
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.,Department of Electronics and Electrical Engineering, Keio University, Kohoku-ku, Yokohama, Japan
| | - Tomoya Higashihara
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata, Japan
| | - Jeffrey B-H Tok
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Youngjun Yun
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon, South Korea.
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
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11
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Lee Y, Chung JW, Lee GH, Kang H, Kim JY, Bae C, Yoo H, Jeong S, Cho H, Kang SG, Jung JY, Lee DW, Gam S, Hahm SG, Kuzumoto Y, Kim SJ, Bao Z, Hong Y, Yun Y, Kim S. Standalone real-time health monitoring patch based on a stretchable organic optoelectronic system. Sci Adv 2021; 7:7/23/eabg9180. [PMID: 34088675 PMCID: PMC8177712 DOI: 10.1126/sciadv.abg9180] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/19/2021] [Indexed: 05/05/2023]
Abstract
Skin-like health care patches (SHPs) are next-generation health care gadgets that will enable seamless monitoring of biological signals in daily life. Skin-conformable sensors and a stretchable display are critical for the development of standalone SHPs that provide real-time information while alleviating privacy concerns related to wireless data transmission. However, the production of stretchable wearable displays with sufficient pixels to display this information remains challenging. Here, we report a standalone organic SHP that provides real-time heart rate information. The 15-μm-thick SHP comprises a stretchable organic light-emitting diode display and stretchable organic photoplethysmography (PPG) heart rate sensor on all-elastomer substrate and operates stably under 30% strain using a combination of stress relief layers and deformable micro-cracked interconnects that reduce the mechanical stress on the active optoelectronic components. This approach provides a rational strategy for high-resolution stretchable displays, enabling the production of ideal platforms for next-generation wearable health care electronics.
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Affiliation(s)
- Yeongjun Lee
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Jong Won Chung
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Gae Hwang Lee
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Hyunbum Kang
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Joo-Young Kim
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Chisung Bae
- Computing Platform Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Hyunjun Yoo
- Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul 08826, Korea
| | - Sujin Jeong
- Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul 08826, Korea
| | - Hyeon Cho
- Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul 08826, Korea
| | - Sung-Gyu Kang
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Ji Young Jung
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Don-Wook Lee
- Computing Platform Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Sangah Gam
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Suk Gyu Hahm
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Yasutaka Kuzumoto
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Sang Joon Kim
- Computing Platform Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Yongtaek Hong
- Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul 08826, Korea
| | - Youngjun Yun
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea.
| | - Sunghan Kim
- Organic Material Lab., Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
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12
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Yun DJ, Yun Y, Lee J, Kim JY, Chung J, Kim SH, Kim YS, Heo S, Park JI, Kim KH, Kwon YN, Chung JW. In-Depth Investigation of the Correlation between Organic Semiconductor Orientation and Energy-Level Alignment Using In Situ Photoelectron Spectroscopy. ACS Appl Mater Interfaces 2020; 12:50628-50637. [PMID: 32986402 DOI: 10.1021/acsami.0c09602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic semiconductors (OSCs) are of interest for replacing traditional Si-based semiconductors as their flexibility and transparency enable new applications. The properties of OSC materials greatly depend on their orientation and molecular arrangement, which are strongly dependent on the underlying substrate material. Hence, in this study, in situ ultraviolet photoelectron spectroscopy (UPS) is used to elucidate the effect of the substrate on OSC orientation. Two types of OSCs, namely those with shape anisotropy (pentacene, dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene, and dibenzothiopheno[6,5-b:6',5'-f]thieno[3,2-b]thiophene) and those with shape isotropy (N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine, tris(4-carbazoyl-9-ylphenyl)amine, and [6,6]-phenyl C71 butyric acid methyl ester), are deposited on different electrode materials. The differences in the UPS spectra of these materials are observed directly. In general, the orientation of anisotropic OSC molecules significantly depends on the substrate properties, while that of the isotropic ones do not. All the anisotropic OSC molecules grown on poly(3,4-ethylenedioxythiophene)-polystyrenesulfonate (PEDOT:PSS) electrodes show a greater degree of molecular ordering than those grown on Au and multiwalled carbon nanotube/PEDOT:PSS electrodes. The molecular arrangements within the OSC/electrode structures are reflected in the energy-level shifts in the corresponding UPS spectra and hence in the electronic configurations. The results of this study should aid the design and synthesis of OSC materials with configurations suitable for organic electronic devices.
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Affiliation(s)
- Dong-Jin Yun
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Youngjun Yun
- Organic Material Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Jiyoul Lee
- Department of Graphic Arts Information Engineering, Pukyong National University, Busan 48513, Korea
| | - Joo-Young Kim
- Organic Material Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - JaeGwan Chung
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Seong Heon Kim
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Yong-Su Kim
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Sung Heo
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Jeong-Il Park
- Organic Material Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Ki-Hong Kim
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Young-Nam Kwon
- Analytical Engineering Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
| | - Jong Won Chung
- Organic Material Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon 16678, Korea
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13
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Jung H, Park W, Holder J, Yun Y, Bong S. Electrochemical Properties of High Nickel Content Li(Ni 0.7Co 0.2Mn 0.1)O₂ with an Alumina Thin-Coating Layer as a Cathode Material for Lithium Ion Batteries. J Nanosci Nanotechnol 2020; 20:6505-6511. [PMID: 32385006 DOI: 10.1166/jnn.2020.18588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The cathode material, high Nickel content Ni0.7Co0.2Mn0.1 (NCM), was synthesized by coprecipitation with NH₄OH used as a complexing agent. The prepared materials are made in the formation of spherical particles of Li(Ni0.7Co0.2Mn0.1)O₂ of several micrometers in diameter. Al₂O₃ was coated by an impregnation method and its content was gradually increased to 1, 2 and 5 wt%. As a result, 1 wt% coated Al₂O₃ compared to pristine NCM exhibited 82% and 80% retention rates at 5 C and 1 wt% Al₂O₃ coated NCM recovery at 0.2 C after 5 C showed 100%. In addition, capacity retention of 1 wt% NCM+Al gently decreased in 100 cycle life characteristics, and capacity retention of 95% or more was confirmed.
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Affiliation(s)
- Hyunju Jung
- Materials and Components Research Institute, Korea Testing and Research Institute (KTR), Gwachoen, 13810, Republic of Korea
| | - Woojung Park
- Department of Civil & Environmental Engineering, Worcester Polytechnic Institute (WPI), Worcester, MA 01609, United States
| | - Joseph Holder
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, 27695, United States
| | - Youngjun Yun
- Materials and Components Research Institute, Korea Testing and Research Institute (KTR), Gwachoen, 13810, Republic of Korea
| | - Sungyool Bong
- Department of Mechanical Engineering, Worcester Polytechnic Institute (WPI), Worcester, MA 01609, United States
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14
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Oh JY, Son D, Katsumata T, Lee Y, Kim Y, Lopez J, Wu HC, Kang J, Park J, Gu X, Mun J, Wang NGJ, Yin Y, Cai W, Yun Y, Tok JBH, Bao Z. Stretchable self-healable semiconducting polymer film for active-matrix strain-sensing array. Sci Adv 2019; 5:eaav3097. [PMID: 31723597 PMCID: PMC6839939 DOI: 10.1126/sciadv.aav3097] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 09/16/2019] [Indexed: 05/20/2023]
Abstract
Skin-like sensory devices should be stretchable and self-healable to meet the demands for future electronic skin applications. Despite recent notable advances in skin-inspired electronic materials, it remains challenging to confer these desired functionalities to an active semiconductor. Here, we report a strain-sensitive, stretchable, and autonomously self-healable semiconducting film achieved through blending of a polymer semiconductor and a self-healable elastomer, both of which are dynamically cross-linked by metal coordination. We observed that by controlling the percolation threshold of the polymer semiconductor, the blend film became strain sensitive, with a gauge factor of 5.75 × 105 at 100% strain in a stretchable transistor. The blend film is also highly stretchable (fracture strain, >1300%) and autonomously self-healable at room temperature. We proceed to demonstrate a fully integrated 5 × 5 stretchable active-matrix transistor sensor array capable of detecting strain distribution through surface deformation.
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Affiliation(s)
- Jin Young Oh
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
- Department of Chemical Engineering, Kyung Hee University, Yongin 17104, South Korea
| | - Donghee Son
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
- Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, 02791 Seoul, South Korea
- School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon 16419, South Korea
| | - Toru Katsumata
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
- Corporate Research and Development, Performance Materials Technology Center, Asahi Kasei Corporation, 2-1 Samejima, Fuji, Shizuoka 416-8501, Japan
| | - Yeongjun Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeongin Kim
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Jeffrey Lopez
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Hung-Chin Wu
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Jiheong Kang
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Joonsuk Park
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Xiaodan Gu
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS 39406, USA
| | - Jaewan Mun
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Nathan Ging-Ji Wang
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Yikai Yin
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Wei Cai
- Department of Mechanical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Youngjun Yun
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
- Samsung Advanced Institute of Technology Yeongtong-gu, Suwon-si, Gyeonggi-do 443-803, South Korea
| | - Jeffrey B.-H. Tok
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305-5025, USA
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15
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Yuan Y, Yun Y, Lei L, Junsheng N, Weiping Z. Efficacy and safety of sorafenib following hepatic resection in patients with hepatocellular carcinoma: A meta-analysis. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz422.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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16
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Mun J, Kang J, Zheng Y, Luo S, Wu HC, Matsuhisa N, Xu J, Wang GJN, Yun Y, Xue G, Tok JBH, Bao Z. Conjugated Carbon Cyclic Nanorings as Additives for Intrinsically Stretchable Semiconducting Polymers. Adv Mater 2019; 31:e1903912. [PMID: 31489716 DOI: 10.1002/adma.201903912] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Molecular additives are often used to enhance dynamic motion of polymeric chains, which subsequently alter the functional and physical properties of polymers. However, controlling the chain dynamics of semiconducting polymer thin films and understanding the fundamental mechanisms of such changes is a new area of research. Here, cycloparaphenylenes (CPPs) are used as conjugated molecular additives to tune the dynamic behaviors of diketopyrrolopyrrole-based (DPP-based) semiconducting polymers. It is observed that the addition of CPPs results in significant improvement in the stretchability of the DPP-based polymers without adversely affecting their mobility, which arises from the enhanced polymer dynamic motion and reduced long-range crystalline order. The polymer films retain their fiber-like morphology and short-range ordered aggregates, which leads to high mobility. Fully stretchable transistors are subsequently fabricated using CPP/semiconductor composites as active layers. These composites are observed to maintain high mobilities when strained and after repeated applied strains. Interestingly, CPPs are also observed to improve the contact resistance and charge transport of the fully stretchable transistors. ln summary, these results collectively indicate that controlling the dynamic motion of polymer semiconductors is proved to be an effective way to improve their stretchability.
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Affiliation(s)
- Jaewan Mun
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Jiheong Kang
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Yu Zheng
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Shaochuan Luo
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210023, China
| | - Hung-Chin Wu
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Naoji Matsuhisa
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Jie Xu
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
- Nanoscience and Technology Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | | | - Youngjun Yun
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
- Samsung Advanced Institute of Technology, 130 Samsung-ro, Suwon-si, 16678, South Korea
| | - Gi Xue
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210023, China
| | - Jeffrey B-H Tok
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
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17
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Li T, Vergalasova I, Wang C, Sheng Y, Yun Y, Liu H, Shi W, Alonso-Basanta M, Dong L. Significant Inter-Planner Variability in Plan Quality for VMAT-Based Multi-Target Stereotactic Radiosurgery (SRS): A Multi-Institution Analysis. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Son D, Kang J, Vardoulis O, Kim Y, Matsuhisa N, Oh JY, To JW, Mun J, Katsumata T, Liu Y, McGuire AF, Krason M, Molina-Lopez F, Ham J, Kraft U, Lee Y, Yun Y, Tok JBH, Bao Z. An integrated self-healable electronic skin system fabricated via dynamic reconstruction of a nanostructured conducting network. Nat Nanotechnol 2018; 13:1057-1065. [PMID: 30127474 DOI: 10.1038/s41565-018-0244-6] [Citation(s) in RCA: 332] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 07/20/2018] [Indexed: 05/20/2023]
Abstract
Electronic skin devices capable of monitoring physiological signals and displaying feedback information through closed-loop communication between the user and electronics are being considered for next-generation wearables and the 'Internet of Things'. Such devices need to be ultrathin to achieve seamless and conformal contact with the human body, to accommodate strains from repeated movement and to be comfortable to wear. Recently, self-healing chemistry has driven important advances in deformable and reconfigurable electronics, particularly with self-healable electrodes as the key enabler. Unlike polymer substrates with self-healable dynamic nature, the disrupted conducting network is unable to recover its stretchability after damage. Here, we report the observation of self-reconstruction of conducting nanostructures when in contact with a dynamically crosslinked polymer network. This, combined with the self-bonding property of self-healing polymer, allowed subsequent heterogeneous multi-component device integration of interconnects, sensors and light-emitting devices into a single multi-functional system. This first autonomous self-healable and stretchable multi-component electronic skin paves the way for future robust electronics.
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Affiliation(s)
- Donghee Son
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
- Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, South Korea
| | - Jiheong Kang
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Orestis Vardoulis
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Yeongin Kim
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Naoji Matsuhisa
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Jin Young Oh
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
- Department of Chemical Engineering, Kyung Hee University, Yongin, South Korea
| | - John Wf To
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Jaewan Mun
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Toru Katsumata
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
- Corporate Research and Development, Performance Materials Technology Center, Asahi Kasei Corporation, Shizuoka, Japan
| | - Yuxin Liu
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | | | - Marta Krason
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | | | - Jooyeun Ham
- Department of Mechanical Engineering, Stanford University, Stanford, CA, USA
| | - Ulrike Kraft
- Department of Electrical Engineering, Stanford University, Stanford, CA, USA
| | - Yeongjun Lee
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Youngjun Yun
- Samsung Advanced Institute of Technology Yeongtong-gu, Suwon-si, Gyeonggi-do, South Korea
| | - Jeffrey B-H Tok
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
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19
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Chung JW, Park WT, Park JI, Yun Y, Gu X, Lee J, Noh YY. Thiophene-Thiazole-Based Semiconducting Copolymers for High-Performance Polymer Field-Effect Transistors. ACS Appl Mater Interfaces 2017; 9:38728-38736. [PMID: 29047273 DOI: 10.1021/acsami.7b12974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report a newly synthesized donor (D)-acceptor (A)type semiconducting copolymer, consisting of thiophene as an electron-donating unit and thiazole as an electron-accepting unit (PQTBTz-TT-C8) for the active layer of the organic field-effect transistors (OFETs). Specifically, this study investigates the structure and electrical property relationships of PQTBTz-TT-C8 with comprehensive analyses on the charge-transporting properties corresponding to the spin rate of the spin coater during the formation of the PQTBTz-TT-C8 film. The crystallinity of PQTBTz-TT-C8 films is examined with grazing incidence X-ray diffraction. Temperature-dependent transfer measurements of the OFETs are conducted to extract the density of states (DOS) and characterize the charge-transport properties. Comparative analyses on charge transports within the framework of the physical model, based on polaron hopping and Gaussian DOS, reveal that the prefactors of both physical charge-transport models are independent of the spin-coating condition for the films. For staggered structural transistors, however, the thickness of the PQTBTz-TT-C8 films, which strongly affect the series resistance along the charge-transfer path in a vertical direction, is changed in accordance with the spin-coating rate. In other words, the spin-coating rate of the PQTBTz-TT-C8 films influences the thickness of the polymer films, yet any significant changes in the crystallinity of the film or electronic coupling between the neighboring molecules upon the spin-coating condition were barely noticeable. Because the PQTBTz-TT-C8 backbone chains inside the thin film are stacked up with the edge-on, the series resistances are changed according to the thickness of the film and thus the performance of the device varies depending on the thickness.
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Affiliation(s)
- Jong Won Chung
- Organic Material Lab., Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd , 130 Samsung-ro, Suwon 16678, Gyeonggi, Republic of Korea
| | - Won-Tae Park
- Department of Energy and Materials Engineering, Dongguk University , 30 Pildong-ro 1-gil, Jung-gu, Seoul 04620, Republic of Korea
| | - Jeong-Il Park
- Organic Material Lab., Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd , 130 Samsung-ro, Suwon 16678, Gyeonggi, Republic of Korea
| | - Youngjun Yun
- Organic Material Lab., Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd , 130 Samsung-ro, Suwon 16678, Gyeonggi, Republic of Korea
| | - Xiaodan Gu
- School of Polymers and High Performance Materials, University of Southern Mississippi , Hattiesburg 39406, Mississippi, United States
| | - Jiyoul Lee
- Department of Graphic Arts Information Engineering, Pukyong National University , 365 Sinseon-ro, Nam-gu, Busan 48547, Republic of Korea
| | - Yong-Young Noh
- Department of Energy and Materials Engineering, Dongguk University , 30 Pildong-ro 1-gil, Jung-gu, Seoul 04620, Republic of Korea
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20
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Lee E, Jung J, Choi A, Bulliard X, Kim JH, Yun Y, Kim J, Park J, Lee S, Kang Y. Dually crosslinkable SiO2@polysiloxane core–shell nanoparticles for flexible gate dielectric insulators. RSC Adv 2017. [DOI: 10.1039/c6ra28230j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A hybrid gate dielectric material for flexible OTFT is developed by using core–shell nanoparticles (SiO2@PSRXL) where the core and the shell consist of silica nanoparticles and polysiloxane resin, respectively.
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Affiliation(s)
- Eunkyung Lee
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
- Department of Chemistry
| | - Jiyoung Jung
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | - Ajeong Choi
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | | | - Jung-Hwa Kim
- Platform Technology Lab
- Samsung Electronics
- Suwon-si
- Korea
| | - Youngjun Yun
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | - Jooyoung Kim
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | - Jeongil Park
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | - Sangyoon Lee
- Material Research Center
- Samsung Electronics
- Suwon-si
- Korea
| | - Youngjong Kang
- Department of Chemistry
- Research Institute for Natural Sciences
- Institute of Nano Science and Technology
- Hanyang University
- Seoul
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21
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Kim JK, Kim DJ, Yun Y. Natural history and factors associated with ulnar-sided wrist pain in distal radial fractures treated by plate fixation. J Hand Surg Eur Vol 2016; 41:727-31. [PMID: 26896455 DOI: 10.1177/1753193416630525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/04/2016] [Indexed: 02/03/2023]
Abstract
UNLABELLED We documented longitudinal changes in the incidence of ulnar-sided wrist pain after distal radial fractures treated by plate fixation and identified factors associated with ulnar-sided wrist pain. A total of 140 patients were enrolled in this study. Radiographs were taken 3 months after operation, and were used to measure radial inclination, anterior angulation and ulnar variance, and to identify the presence of an ulnar styloid fracture. Clinical assessments at the same time included grip strengths, ranges of wrist motion and the patient-rated wrist evaluation questionnaire. The presence of ulnar-sided wrist pain was noted at each follow-up visit. The incidence of ulnar-sided wrist pain decreased significantly with time after surgery (22 patients at 3 months, 11 patients at 6 months and three patients at 12 months). The mean age, sex, the presence of an ulnar styloid fracture and the classification of the distal radial fracture were not factors that were associated with a higher incidence of ulnar-sided wrist pain, but there was an association between higher patient-rated wrist evaluation scores and the presence of ulnar-sided wrist pain. LEVEL OF EVIDENCE Prognosis, Level IV.
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Affiliation(s)
- J K Kim
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
| | - D J Kim
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
| | - Y Yun
- Department of Orthopedic Surgery, Ewha Womans Universtiy Mokdong Hospital, Seoul, Korea
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22
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Liu W, Yin J, Zhao G, Yun Y, Wu S, Jones K, Lei A. Differential regulation of cyclin B1 degradation between the first and second meiotic divisions of bovine oocytes. Theriogenology 2012; 78:1171-81.e1. [DOI: 10.1016/j.theriogenology.2012.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 11/28/2022]
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23
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Hovmöller S, Zou X, Yun Y, Wei W, Rabbani F. Solving structures of sub-micron crystals by rotation electron diffraction. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312098856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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24
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Ryu J, Yun Y, Choi B. P04.12. Medical practices and attitudes of dual medical license holders in Korea. BMC Complement Altern Med 2012. [PMCID: PMC3373693 DOI: 10.1186/1472-6882-12-s1-p282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Ryu J, Yun Y, Lim B. P04.63. The consciousness of medical doctors about collaborative practice of Western medicine and traditional Korean medicine. Altern Ther Health Med 2012. [PMCID: PMC3373801 DOI: 10.1186/1472-6882-12-s1-p333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Son B, Yun Y, Choi I. P02.14. Efficacy of ah shi point acupuncture on acne vulgaris. BMC Complement Altern Med 2012. [PMCID: PMC3373790 DOI: 10.1186/1472-6882-12-s1-p70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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27
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Kim MK, Lee M, Shin C, Baik I, Yun Y, Okubo H, Sasaki S. P2-140 Dietary patterns and risk of metabolic syndrome among Korean population: the Korean national health and nutrition examination survey, 2007-2009. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976i.75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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28
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Lee E, An S, Cho SA, Yun Y, Han J, Hwang YK, Kim HK, Lee TR. The influence of alkane chain length on the skin irritation potential of 1,2-alkanediols. Int J Cosmet Sci 2011; 33:421-5. [DOI: 10.1111/j.1468-2494.2011.00646.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Yun Y, Peng Y, Liu FX, Lei C. Wolbachia screening in spiders and assessment of horizontal transmission between predator and prey. Neotrop Entomol 2011; 40:164-169. [PMID: 21584395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 10/11/2010] [Indexed: 05/30/2023]
Abstract
Recent studies have revealed that the prevalence of Wolbachia in arthropods is attributable not only to its vertical transmission, but also to its horizontal transfer. In order to assess the horizontal transmission of Wolbachia between predator and prey, arthropods belonging to 11 spider families and six insect families were collected in the same field of rice. The distribution of Wolbachia in these arthropods was detected by diagnostic PCR amplification of the wsp (Wolbachia outer surface protein gene) and 16S rDNA genes. Nurscia albofasciata Strand (Araneae: Titanoecidae), Propylea japonica Thunberg (Coleoptera: Coccinellidae), Paederus fuscipes Curtis (Coleoptera: Staphylinidae), and Nilaparvata lugens Stal (Homoptera: Delphacidae) were infected with Wolbachia. This is the first report of infection of N. albofasciata and P. fuscipes by Wolbachia. No direct evidence indicated the existence of horizontal transmission of Wolbachia between predator and prey.
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Affiliation(s)
- Y Yun
- College of Life Science, Hubei University, Wuhan, China
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Kim E, Cheong HS, Bae JS, Chun J, Park TJ, Lee K, Yun Y, Shin HD. Identification of genetic polymorphisms in bovine mitochondrial deoxyribonucleic acid. J Anim Sci 2010; 88:2551-5. [PMID: 20418455 DOI: 10.2527/jas.2009-2235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, the intent was to identify genetic polymorphisms of mitochondrial (mt) DNA in Korean cattle (Bos taurus coreana) and to analyze the genetic relationship between Korean cattle and other breeds. Whole mtDNA genomes (16,338 bp) of 26 animals (16 Korean cattle and 10 Holsteins) were directly sequenced. Multiple alignments, including 26 whole-mtDNA sequences obtained by direct sequencing and 10 mtDNA sequences from a public database (National Center for Biotechnology Information), revealed 393 mtDNA polymorphisms (382 SNP, 3 heteroplasmies, and 8 insertion-deletion polymorphisms). Estimated gene diversity of mtDNA was 0.00198 among these 36 animals. Phylogenic analysis with mtDNA polymorphisms revealed a distinct genetic difference between Bos taurus (Korean, Japanese Black, Holstein, and Fleckvieh breeds) and Bos indicus (Nellore and Zwergzebu breeds). The genetic information regarding mtDNA polymorphisms identified in this study would be useful for further investigation of mtDNA in other breeds.
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Affiliation(s)
- E Kim
- Department of Veterinary Medicine, Graduate School, Cheju National University, Cheju, Korea, 153-801
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Lee E, Min S, Jung S, Kown Y, Kang H, Yun Y, Lee S. 272 Oncologic safety and QoL of immediate latissimus dorsi myocutanous flap. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70298-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Yun Y, Duan W, Chen P, Wu H, Shen Z, Qian Z, Wang D. Down-Regulation of Cyclooxygenase-2 is Involved in Ischemic Postconditioning Protection Against Renal Ischemia Reperfusion Injury in Rats. Transplant Proc 2009; 41:3585-9. [DOI: 10.1016/j.transproceed.2009.06.209] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2009] [Revised: 03/07/2009] [Accepted: 06/01/2009] [Indexed: 10/20/2022]
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Yun Y, Duan W, Chen P, Wu H, Shen Z, Qian Z, Wang D. Ischemic Postconditioning Modified Renal Oxidative Stress and Lipid Peroxidation Caused By Ischemic Reperfusion Injury in Rats. Transplant Proc 2009; 41:3597-602. [DOI: 10.1016/j.transproceed.2009.06.203] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 04/14/2009] [Accepted: 06/01/2009] [Indexed: 10/20/2022]
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Choi S, Hong Y, Cho H, Yun Y, Kim J, Moon S, Han C, Shin J, Kim S, Cho Y. 296: Early Treatment of Hypertonic Saline and Arginine Is Important in Restoration of T Cell Dysfunction. Ann Emerg Med 2009. [DOI: 10.1016/j.annemergmed.2009.06.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kim S, Lee J, Yun Y, Kim S, Kim S, Do Y, Ro J, Park S, Jeong H, Kang J. Employment status and work-related difficulties in family caregivers of terminal cancer patients compared with the general population. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.9580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9580 Background: This study was aimed to investigate the employment status and work-related difficulties among family caregiver of terminal cancer patients compared with the general population. Methods: A survey was administered to 381 family caregivers of terminal cancer patients at 11hospitals and 994 general populations aged more than 18 years. Results: Family caregivers of terminal cancer patients were female (66.7%) and the patient's spouse (50.9%), with mean age of 46.8years (SD, 13.5). 212(56.1%) were working before cancer diagnosis, however, only 133(36.3%) continued working currently. Compared with the general population, 233(63.7%)family caregivers of terminal cancer patients were more likely to be not working (adjusted odds ratio [aOR] =2.39; 95% confidence interval [95%CI] = 1.73 to 3.29).Those who continued working reported more easy fatigability (40.6% vs 22.4%) and reduced working hours (20.3% vs 2.1%) than general population. For those doing housework, caregiving itself (56.4%) were identified to be the most common difficulties, followed by easy fatigability (32.3%). Major reasons for not working were providing care to the terminal cancer patients (24.0%). Older age (aOR=10.37; 95%CI=2.80 to 38.41), female sex (aOR=4.28; 95%CI=2.25 to 8.13), lower household income (aOR=2.19; 95%CI=1.19 to 4.06), bearing medical cost by other than spouse (aOR=2.10; 95%CI=1.05 to 4.19), and low performance status of the patients (aOR=2.00; 95%CI=1.01 to 3.95) were significantly associated with not working. Conclusions: When compared to the general population, family caregivers of terminal cancer patients were at risk job loss from their caregiving burden, and caregiving and easy fatigability were the major work-related difficulties. Our study might help make a strategy to reduce job loss for family caregivers' caregiving burden. No significant financial relationships to disclose.
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Affiliation(s)
- S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Lee
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Y. Yun
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Kim
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Y. Do
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Ro
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - S. Park
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - H. Jeong
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - J. Kang
- Fatima Hospital, Daegu South, Republic of Korea; National Cancer Center, Ilsandong-gu, Republic of Korea; Department of Internal Medicine College of Medicine, Daegu, Republic of Korea; Kyunghee University Hospital, Seoul, Republic of Korea; Dongsan Medical Center, Keimyung University School, Daegu, Republic of Korea; Good Samaritan Hospital, Pohang-si, Republic of Korea; College of Medicine, Gyeongsang National University, Jinju, Republic of Korea
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Kim S, Nam J, Park S, Bae D, Park C, Cho C, Lee J, Yun Y. Study of anxiety and depression in cervical cancer survivors. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e20644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e20644 Background: Cervical cancer is the second leading cause of cancer related deaths among women in Korea. However, few studies have been conducted to elucidate the psychological distress of this population. This study aimed to examine the prevalence of anxiety and depression among cervical cancer survivors, and to identify factors associated with such caseness. Methods: A total of 832 cervical cancer survivors recruited from six large hospitals in Korea completed a mailed survey, which included the Hospital Anxiety and Depression Scale (HADS), European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30, and QLQ-CX24. Anxiety and depression were defined by a score of ≥ 8 on the HADS subscales. With a framework that included socio-demographic, clinical, and symptom characteristics, multivariate logistic regression models were used to identify factors associated with anxiety and depression. Results: Among cervical cancer survivors, 34.3% reported HADS-defined anxiety and 39.7% reported HADS-defined depression. Anxiety was associated with having a lower income (OR=1.95, p=.021), smoking (OR=2.42, p=.002), poor body image (OR=3.26, p<.001), peripheral neuropathy (OR=2.21, p=.002), menopausal symptoms (OR=2.02, p=.004), and sexual inactivity (OR=2.35, p=.001). Depression was associated with younger age (OR=1.75, p=.006), having a lower income (OR=2.14 p<.001), drinking (OR=1.56, p=.050), poor body image (OR=4.59, p<.001), peripheral neuropathy (OR=2.34, p<.001), and sexual inactivity (OR=2.68, p=.002). Both anxiety and depression were influenced by socio-demographic factors, health behaviors, and cervical cancer-specific symptom characteristics rather than cancer- or treatment-related factors. Conclusions: Anxiety and depression were highly prevalent among cervical cancer survivors in Korea. This examination of risk factors for anxiety and depression will be helpful for the development of clinical management strategies in cervical cancer survivors. No significant financial relationships to disclose.
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Affiliation(s)
- S. Kim
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - J. Nam
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - S. Park
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - D. Bae
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - C. Park
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - C. Cho
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Goyang, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Pochon, Republic of Korea; Keimyung University, Daegu, Republic of Korea; Kyung Hee University, Seoul, Republic of Korea
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Jo S, Juhasz A, Zhang K, Ruel C, Wilczynski SP, Yun Y, Ellenhorn JD, Paz B, Vora N, Shibata S. Human papillomavirus (HPV) infection as a prognostic factor in patients with oropharyngeal squamous cell carcinoma treated in a prospective phase II clinical trial. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.6035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lee M, Lee E, Ro J, Kang H, Shin K, Lee K, Chung KW, Kim S, Yun Y. Social support and depression in patients with breast cancer during 1 year from diagnosis compared with the general population. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lim Y, Kim T, Kwon J, Kim D, Lee S, Kwon B, Hong J, Yun Y. OBOVATOL INHIBITS INTIMAL HYPERPLASIA AFTER CAROTID ARTERY INJURY BY INDUCTION OF P21 PROTEIN. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70255-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yu J, Kim T, Lee J, Tudev M, Shin H, Yun Y. GENISTEIN, AN ISOFLAVONE INHIBITS RAT AORTIC SMOOTH MUSCLE CELL PROLIFERATION AND CELL CYCLE THROUGH THE REGULATION OF CELL CYCLE-RELATED PROTEINS. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70253-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lee J, Jin Y, Lim Y, Yu J, Lee J, Tudev M, Im J, Park E, Kim T, Lee M, Yun Y. ANTIPLATELET ACTIVITY OF FENOFIBRATE, A PPARALPHA AGONIST, WAS MEDIATED BY BLOCKING OF CYTOSOLIC CALCIUM MOBILIZATION AND THROMBOXANE A2 RECEPTOR. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb02384.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Park J, Chang Y, Kang K, Jeong H, Moon D, Kim S, Yun Y. The use of complementary and alternative medicine in patients with terminal cancer in Korea: Nationwide cross-sectional study. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.19534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
19534 Background: Although the use of complementary and alternative medicine(CAM) is widespread among patients with chronic diseases including cancer, little is known about CAM use in terminal cancer patients. Methods: This study included 4,042 families of cancer patients who died at 17 hospitals in Korea between January and December 2004. We conducted with telephone survey to decedents’ families. The response rate was 41.1%. The questionnaire included whether cancer patients had used CAM during last one year before death, type of modality, motivation for use, attitudes to CAM, and consultation with doctors. Results: CAM use of cancer patients was reported by 36.3% (604 of 1,662) and the average rate of CAM cost was 32% of total medical costs during one year before patient’s death. CAM use was more likely to death at hospitals (adjusted Odds Ratio: 1.35, 95% Confidential Interval: 1.15–1.58), residence in rural (aOR:1.26, 95%CI:1.08–1.47), need consultations about care (aOR:1.65, 95%CI:1.30–2.09) and religious support (aOR:1.3, 95% CI:1.11–1.53), diagnosis except liver/gallbladder cancer (aOR:0.67, 95%CI:0.55–0.81), and longer disease period (aOR:1.85, 95% CI:1.5–2.2). Use was greatest for mushrooms (41.6%), vegetable juice (25.6%), ginseng (21.8%) and Chinese medicine (16.4%). The motivation for CAM use was the recommendations from family members or friends (83.5%) and internet or advertisement (16.1%) but physicians’ recommendation or education (1.4%) was rare. The 37.4% of families of CAM-used patients were satisfied with CAM because of but feeling better or comfortable (79.3%), not cure (5.4%). And otherwise, the 62.1% of them were unsatisfied with CAM because of no effect (87.3%). Only 41.7% CAM users consulted with their physician. Conclusions: This study revealed a high prevalence of CAM use among terminal cancer patients without recommendation from doctors. Medical staffs should evaluate patients’ CAM use and inform accurately about CAM to terminal cancer patients and family for quality of care improvement. No significant financial relationships to disclose.
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Affiliation(s)
- J. Park
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - Y. Chang
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - K. Kang
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - H. Jeong
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - D. Moon
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - S. Kim
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
| | - Y. Yun
- National Cancer Center, Goyang, Republic of Korea; National Cancer Center, Seoul, Republic of Korea; Gyeong Sang National University Hospital, Jinju, Republic of Korea; Good Samaritan Hospital, Pohang, Republic of Korea; Sam Anyang Hospital, Anyang, Republic of Korea; Chungnam University, Daejeon, Republic of Korea
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Noh H, Lee M, Yun Y, Park S, Bae D, Nam J, Park C, Cho C, Lee J, Chang Y. Cervical cancer patients’ preferences and use of various cancer information sources in South Korea. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.16073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
16073 Background: Accessing appropriate facts is important in enabling cancer patients cope with the disease. This study focused on the utilization and preferences of cancer information sources by cervical cancer patients in terms of ease in receiving and searching the available data. Methods: The study included 830 women over the age of 18 years treated for cervical cancer at six hospitals in South Korea between 1983 and 2004. All the participants provided written informed consent, and the Institutional Review Board of the National Cancer Center approved the protocol. A questionnaire addressed the patients’ use of and preferences for sources and forms of cancer information. Data were collected by mail. Results: Television and/or the radio were the the most frequently cited sources of cancer information by the middle and oldest age groups: 45–64 years (52.0%), =65 years (47.3%), while patients in the youngest age group (<45 years) used the Internet (38.8%). Booklets and/or pamphlets (24.0%) were the source of cancer information preferred by the youngest age group, while patients in the middle and oldest age groups preferred TV/radio: 45–64 years (35.7%) and =65 years (55.0%). Life notes and/or experiences (43.2%), that is, personal accounts, comprised the most easily understood form of information regardless of age group. Conclusions: Our findings indicate that cervical cancer patients’ utilization of and preferences for sources of cancer information vary according to patient age. Tailored educational materials that consider the users’ age and condition should be customized to best fit their specific preferences. No significant financial relationships to disclose.
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Affiliation(s)
- H. Noh
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - M. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - S. Park
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - D. Bae
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - J. Nam
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - C. Park
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - C. Cho
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
| | - Y. Chang
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Seoul, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Kangnam Cha Hospital, Seoul, Republic of Korea; Keimyung University, Daegu, Republic of Korea; East-West Neo Medical Center, Seoul, Republic of Korea
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Lee K, Lee M, Bae J, Kim S, Kim Y, Ryn K, Lee J, Noh J, Sohn T, Hong S, Yun Y. Work situation and work-related difficulties in stomach cancer survivors compared with the general population. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.9084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
9084 Background: We aimed to investigate the work situation and work-related difficulties among stomach cancer survivors compared with the general population. Methods: We enrolled 426 stomach cancer survivors diagnosed 2001 to 2003 from two hospitals and 994 members without a history of cancer selected randomly from a representative sample of Korea adults. We identified work situation and work-related difficulties in two groups using multivariate logistic regression. Results: An employment rate of stomach cancer survivors decreased from 66.2% to 53.1% at average 28 months after their diagnosis and it was lower than that of general population (63.5%). The primary reason for not-working in survivors were that they were easily fatigued (31.2%) and had limitations in physical functioning (13.0%). Examining work-related difficulties, 50.6% of survivors who were working at the time of survey reported that they were easily fatigued and 37.5% of survivors reported that their capacity of work decreased whereas only 22.4%, 10.6% of general population reported. Survivors had housework- related difficulties because they were easily fatigued (74.4%) and emotionally distressful (12.2%) whereas 58.0% and 4.0% of general population reported. Older age (adjusted odds ratio [aOR]=18.12; 95% confidence interval [CI]=6.59 to 49.81), female (aOR=5.30; 95% CI=7.37 to 31.31), low income (aOR=1.87; 95% CI=1.04 to 3.33), poor physical functioning (aOR=0.97; 95% CI=0.95 to 0.98) and total gastrectomy (aOR=2.40; 95% CI=1.26 to 4.60) were more likely to increase the likelihood of not working in stomach cancer survivors. Conclusions: Stomach cancer and its treatment had a negative impact on employment rate as previous studies with other type of cancer. Our study found that stomach cancer survivors had an experience not only work-related but also housework-related difficulties. This information on stomach survivors’ might be help to make a better plan for the intervention of stomach cancer survivors’ return to work. No significant financial relationships to disclose.
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Affiliation(s)
- K. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - M. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Bae
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - S. Kim
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - Y. Kim
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - K. Ryn
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Lee
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - J. Noh
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - T. Sohn
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - S. Hong
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
| | - Y. Yun
- National Cancer Center, Gyeonggi-do, Republic of Korea; Samsung Medical Center, Sungkyunkwan University, Seoul, Republic of Korea
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Jiawei L, Yuechan L, Riran W, Yan D, Yun Y, Xiufeng L. P-469. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Park D, Yun Y. Tyrosine phosphorylation-dependent yeast two-hybrid system for the identification of the SH2 domain-binding proteins. Mol Cells 2001; 12:244-9. [PMID: 11710529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
In this paper, we established a modified yeast two-hybrid system, which is specialized for the detection of SH2 domain-binding proteins. The employment of the SH2 domain-tyrosine kinase fusion protein as bait allowed the efficient identification of SH2 domain-binding proteins. The general applicability of the system was tested using various combinations of SH2-kinase fusion bait and prey. The results indicate that the system specifically detected the previously reported in vivo interactions between the SH2 domains and their binding partners. In addition, using this system, we found the interaction between the adaptor protein, Lad, and the SH2 domain of Grb2 or PLC-gamma1. The binding of Lad to Grb2 was further confirmed in mammalian cells by a co-immunoprecipitation study. The conclusion is that the established tyrosine phosphorylation-dependent yeast two-hybrid system provides a novel and efficient way to define the SH2 domain-binding molecules.
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Affiliation(s)
- D Park
- Division of Molecular Life Science & the Center for Cell Signaling Research at Ewha Woman's University, Seoul, Korea
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48
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Kim H, Lee YH, Won J, Yun Y. Through induction of juxtaposition and tyrosine kinase activity of Jak1, X-gene product of hepatitis B virus stimulates Ras and the transcriptional activation through AP-1, NF-kappaB, and SRE enhancers. Biochem Biophys Res Commun 2001; 286:886-94. [PMID: 11527382 DOI: 10.1006/bbrc.2001.5496] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Here, based on the recent finding of HBx (X-gene product of hepatitis B virus) as the inducer of Jak1, we investigated the mechanism for the HBx-mediated host cell regulation and found that (i) HBx associates specifically with Jak1 in vivo; (ii) HBx itself forms a dimer which leads to juxtaposition of associated Jak1 and subsequent activation of the tyrosine kinase activity of Jak1; (iii) HBx-mediated activation of the promoters containing AP-1-, NF-kappaB-, SRE-, and SIE-sites is dependent on the activation of Jak1; (iv) Jak1, once activated by HBx, induces Ras activity through recruitment of Grb2 and induces tyrosine phosphorylation of Raf1, but not shc. These findings show that previously reported functions of HBx, such as activation of multiple signaling pathways and transcriptional activation are attributable to HBx-mediated Jak1 activation.
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Affiliation(s)
- H Kim
- Division of Molecular Life Science and Center for Cell Signaling Research, Ewha Woman's University, 11-1 Daehyundong, Seoul, Seodaemoongu, 120-750, Korea
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Park D, Choi YB, Han MK, Kim UH, Shin J, Yun Y. Adaptor protein Lad relays PDGF signal to Grb2 in lung cells: a tissue-specific PDGF signal transduction. Biochem Biophys Res Commun 2001; 284:275-81. [PMID: 11394873 DOI: 10.1006/bbrc.2001.4957] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Lad was previously identified as an adaptor protein binding to the SH2 domain of Lck (1). Specific detection of Lad mRNA in lung cells, as well as, in T cells led us to investigate the signaling pathways regulating Lad in lung cells. We found that (i) upon PDGF stimulation, Lad expression is induced in lung cells, especially in the bronchial epithelial cells; (ii) Lad is tyrosine phosphorylated upon PDGF stimulation and is associated with PDGF receptor; (iii) upon PDGF stimulation, Grb2 is recruited to Lad in human embryonic lung cells; (iv) overexpression of Lad elevated AP-1 promoter activity by two- to threefold, whereas dominant negative Lad abrogated PDGF-dependent activation of AP-1 promoter. These results provide a novel mechanism of PDGF-dependent signaling, in which Lad acts as an adaptor in a tissue-specific manner, linking PDGF signal to Grb2 and subsequent activation of AP-1.
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Affiliation(s)
- D Park
- Division of Molecular Life Science, Ewha Womans University, Seoul, 120-750, Korea
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Chen S, Chen Y, Yun Y. [The influence of malocclusion on self-esteem and personality of college student]. Zhonghua Kou Qiang Yi Xue Za Zhi 2000; 35:299-302. [PMID: 11780517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the relationship among the different malocclusions and self-esteem and personality. METHODS Two hundred and forty college students with normal occlusion and different types of malocclusion were classified into four groups(class I, class II, class III and normal) by Angle's classification, Sixty students in each group. The first three groups had been divided into three subgroups respectively by IOTN: mild, moderate and severe, twenty students in each subgroup. Each subject was assessed by using the body-esteem scale (BES) and the Eysenck personality questionnaire (EPQ). RESULTS (1) the mean score on facial appearance subscale in BES of the normal group is significantly higher than that of moderate and severe subgroups in class II and class III groups; (2) the mean T score on E subscale in EPQ of the normal group is significantly higher than that of severe subgroups in class II and class III groups, and the mean T score on N subscale in EPQ of the normal group is significantly lower than that of severe subgroups in class II and class III groups; (3) There is a positive correlation between the mean score on facial appearance subscale in BES and the mean T score on E subscale in EPQ and a negative correlation between the mean score on facial appearance subscale in BES and the mean T score on N subscale in EPQ. CONCLUSIONS (1) The students with moderate and severe class II and class III malocclusion have lower self esteem about their facial appearance than normal students; (2) The trends of introverstion and astatic emotion are higher in students with severe class II and class III malocclusion than in normal students; (3) The higher self esteem about his (or her) facial appearance, the higher trends of extroversion and statical emotion he(or she) has; the lower self-esteem about his (or her) facial appearance, the higher trends of introversion and astatic emotion he (or she) has.
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Affiliation(s)
- S Chen
- Department of Orthodontics, Dental College, West China University of Medical Science, Chengdu 610041, China
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