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Your search keyword '"Chang, Ting-Hsiang"' showing total 136 results
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136 results on '"Chang, Ting-Hsiang"'

1. Widely color-temperature low-luminosity-loss electrochromic-tuned white light-emitting diodes

Author

Kuo, Yu-Yi, Huang, Chiu-Chang, Chen, Wei-Ting, Chang, Ting-Hsiang, Lu, Hsin-Che, Ho, Kuo-Chuan, and Chao, Chih-Yu

Subjects
Physics - Applied Physics, Physics - Optics
Abstract

Light-emitting diodes (LEDs) are efficient light sources extensively applied in people's daily life nowadays, with profound effect on their psychological and physiological state subtly and deeply. The correlated color temperature (CCT) the eyes perceive is a key parameter, but the CCT tuning technology of LEDs remains in the development stage. In this study, an electrochromic (EC) material is employed in the tuning device, exhibiting a wide CCT tuning range from 3,200 K to 6,900 K, varying almost along the black-body locus. The driving voltage is lower than 2.4 V, with luminosity loss less than 16%. Using the EC materials, the performance of CCT tuning technology is able to be further enhanced.

Published
2019
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5. A Novel Phytogenic Formulation, EUBIO-BPSG, as a Promising One Health Approach to Replace Antibiotics and Promote Reproduction Performance in Laying Hens

Author

Tran Nguyen Minh, Hieu, primary, Kuo, Tien-Fen, additional, Lin, Wen-Yu, additional, Peng, Tzu-Chia, additional, Yang, Greta, additional, Lin, Chih-Yu, additional, Chang, Ting-Hsiang, additional, Yang, Yu-Liang, additional, Ho, Cheng-Hsun, additional, Ou, Bor-Rung, additional, Yang, Chu-Wen, additional, Liang, Yu-Chuan, additional, and Yang, Wen-Chin, additional

Published
2023
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8. Valence-Dependent Electrical Conductivity in a 3D Tetrahydroxyquinone-Based Metal-Organic Framework

Author

Chen, Gan, Gee, Leland B., Xu, Wenqian, Zhu, Yanbing, Lezama-Pacheco, Juan S., Huang, Zhehao, Li, Zongqi, Babicz, Jeffrey T., Choudhury, Snehashis, Chang, Ting-Hsiang, Reed, Evan, Solomon, Edward, Bao, Zhenan, Chen, Gan, Gee, Leland B., Xu, Wenqian, Zhu, Yanbing, Lezama-Pacheco, Juan S., Huang, Zhehao, Li, Zongqi, Babicz, Jeffrey T., Choudhury, Snehashis, Chang, Ting-Hsiang, Reed, Evan, Solomon, Edward, and Bao, Zhenan

Abstract

Electrically conductive metal-organic frameworks (cMOFs) have become a topic of intense interest in recent years because of their great potential in electrochemical energy storage, electrocatalysis, and sensing applications. Most of the cMOFs reported hitherto are 2D structures, and 3D cMOFs remain rare. Herein we report FeTHQ a 3D cMOF synthesized from tetrahydroxy-1,4-quinone (THQ) and iron(II) sulfate salt. FeTHQexhibited a conductivity of 3.3 +/- 0.55 mS cm(-1) at 300 K, which is high for 3D cMOFs. The conductivity of FeTHQis valence-dependent. A higher conductivity was measured with the as-prepared FeTHQ than with the air-oxidized and sodium naphthalenide-reduced samples.

Published
2020
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10. Valence-Dependent Electrical Conductivity in a 3D Tetrahydroxyquinone-Based Metal–Organic Framework

Author

Chen, Gan, primary, Gee, Leland B., additional, Xu, Wenqian, additional, Zhu, Yanbing, additional, Lezama-Pacheco, Juan S., additional, Huang, Zhehao, additional, Li, Zongqi, additional, Babicz, Jeffrey T., additional, Choudhury, Snehashis, additional, Chang, Ting-Hsiang, additional, Reed, Evan, additional, Solomon, Edward I., additional, and Bao, Zhenan, additional

Published
2020
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27. Stretchable Ti3C2Tx MXene microsupercapacitors with high areal capacitance and quasi-solid-state multivalent neutral electrolyte.

Author

Li, Shuo, Chang, Ting-Hsiang, Li, Yang, Ding, Meng, Yang, Jie, and Chen, Po-Yen

Abstract

Emerging wearable electronics require stretchable energy storage devices to achieve energy autonomy for future commercialization. Stretchable microsupercapacitors (SMSCs) with neutral multivalent electrolytes are desired to increase the specific capacitance while addressing the safety concerns of using acidic/organic electrolytes near the human body. Ti3C2Tx MXene nanosheets exhibit attractive electrochemical properties for various energy storage applications, yet few MXene SMSCs with neutral electrolytes were reported. Herein, a two-step contraction process was developed for fabrication of MXene SMSCs with high specific capacitance. After thermal shrinkage and solvent-induced contraction, an elastomer-infiltrated MXene (e-MXene) device with miniaturized dimensions and interdigitated electrodes was obtained. Upon incorporating an acidic gel electrolyte, the e-MXene SMSC demonstrated high areal capacitance (CA, 127.9 mF cm−2), high rate performance (64.0% retention from 10 to 200 mV s−1), and high mechanical stability under 50% strain for 3000 cycles (91.6% preservation). Furthermore, the e-MXene SMSC with neutral multivalent electrolyte demonstrated high CA of 61.4 and 51.7 mF cm−2 under 0% and 50% strains, respectively. Compared with the literature, our e-MXene SMSC with acidic electrolyte showed superior energy density (5.4 μW h cm−2 at 0.15 mW cm−2), and the SMSC with neutral multivalent electrolyte demonstrated high electrochemical performance (3.1 μW h cm−2 at 0.03 mW cm−2) together with ensured user safety. [ABSTRACT FROM AUTHOR]

Published
2021
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28. Intercalation of Metal Ions into Ti3C2Tx MXene Electrodes for High‐Areal‐Capacitance Microsupercapacitors with Neutral Multivalent Electrolytes.

Author

Li, Shuo, Shi, Qi, Li, Yang, Yang, Jie, Chang, Ting‐Hsiang, Jiang, Jianwen, and Chen, Po‐Yen

Subjects
METAL ions, ELECTRODES, ENERGY density, ELECTROLYTES, MOLECULAR spectroscopy, CARBON foams
Abstract

Microsupercapacitors (MSCs) with neutral multivalent electrolytes are safer, cheaper, and exhibit higher theoretical energy densities compared with the MSCs with acidic and alkaline electrolytes. Multivalent charge carriers (e.g., Mg2+, Zn2+) in the MSCs with Ti3C2Tx MXene electrodes have not been demonstrated, which could theoretically achieve higher specific capacitances and energy densities. However, because of the larger size of multivalent charge carriers, the MXene electrodes require further modifications to facilitate reversible electrochemical reactions. Herein, through spontaneous intercalation of various metal ions into MXene multilayers, twelve metal ion intercalated MXene electrodes (Mn+‐MXene) are fabricated and demonstrate improved electrochemical performance. Different nanopillar effects are observed between divalent Be2+ and trivalent Al3+ intercalants, which are systematically investigated by electrochemical impedance spectroscopy and molecular dynamics simulation. Among all Mn+‐MXene electrodes, the Be2+‐MXene electrode largely facilitates the charge‐transfer process with minimal disturbance of electrolyte diffusion rates, showing improved specific capacitances and high rate performance in univalent (Li2SO4, Na2SO4, K2SO4) and multivalent electrolytes (BeSO4, MgSO4, ZnSO4). Finally, flexible Be2+‐MXene MSCs with neural ZnSO4 gel electrolytes are fabricated, demonstrating superior areal capacitances (77.2 mF cm−2) and high energy density (3.86 μWh cm−2 at 0.12 mW cm−2) together with high user safety. [ABSTRACT FROM AUTHOR]

Published
2020
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33. Synthesis of MOF-525 derived nanoporous carbons with different particle sizes for supercapacitor application

Author

Chang, Ting-Hsiang, Young, Christine, Lee, Min-Han, Salunkhe, Rahul R, Alshehri, Saad M, Ahamad, Tansir, Islam, Md Tofazzal, Wu, Kevin C.-W, Hossain, Md. Shahriar Al, Yamauchi, Yusuke, Ho, Kuo-Chuan, Chang, Ting-Hsiang, Young, Christine, Lee, Min-Han, Salunkhe, Rahul R, Alshehri, Saad M, Ahamad, Tansir, Islam, Md Tofazzal, Wu, Kevin C.-W, Hossain, Md. Shahriar Al, Yamauchi, Yusuke, and Ho, Kuo-Chuan

Abstract

Nanoporous carbon (NC) materials have attracted great research interest for supercapacitor applications, because of their excellent electrochemical and mechanical stability, good electrical conductivity, and high surface area. Although there are many reports on metal-organic framework (MOF)-derived carbon materials, previous synthetic studies have been hindered by imperfect control of particle sizes and shapes. Here, we show precise control of the particle sizes of MOF-525 from 100 nm to 750 nm. After conversion of MOF-525 to NC, the effects of variation of the particle size on the electrochemical performance have been carefully investigated. The results demonstrate that our NC is a potential candidate for practical supercapacitor applications.

Published
2017

35. Biosensing: Enhanced Charge Collection in MOF-525-PEDOT Nanotube Composites Enable Highly Sensitive Biosensing (Adv. Sci. 11/2017)

Author

Huang, Tzu-Yen, primary, Kung, Chung-Wei, additional, Liao, Yu-Te, additional, Kao, Sheng-Yuan, additional, Cheng, Mingshan, additional, Chang, Ting-Hsiang, additional, Henzie, Joel, additional, Alamri, Hatem R., additional, Alothman, Zeid A., additional, Yamauchi, Yusuke, additional, Ho, Kuo-Chuan, additional, and Wu, Kevin C.-W., additional

Published
2017
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