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Arbab AA, Cho S, Jung E, Han HS, Park S, Lee H. Ultralow-Overpotential Acidic Oxygen Evolution Reaction Over Bismuth Telluride-Carbon Nanotube Heterostructure with Organic Framework. Small 2024; 20:e2307059. [PMID: 37946687 DOI: 10.1002/smll.202307059] [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: 08/18/2023] [Revised: 10/19/2023] [Indexed: 11/12/2023]
Abstract
The state-of-the-art iridium and ruthenium oxides-based materials are best known for high efficiency and stability in acidic oxygen evolution reaction (OER). However, the development of economically feasible catalysts for water-splitting technologies is challenging by the requirements of low overpotential, high stability, and resistance of catalysts to dissolution during the acidic oxygen evolution reaction . Herein, an organometallic core-shell heterostructure composed of a carbon nanotube core (CNT) and bismuth telluride (Bi2Te3) shell (denoted as nC-Bi2Te3) is designed and use it as a catalyst for the acidic OER. The proposed catalyst achieves an ultralow overpotential of 160 mV at 10 mA cm-2 (geometrical), thereby outperforming most of the state-of-the-art precious-metal-based catalysts. The low Tafel slope of 30 mV dec-1 and charge transfer resistance (RCT) of 1.5 Ω demonstrate its excellent electrocatalytic activity. The morphological and chemical compositions of nC-Bi2Te3 enable the generation of ─OH functional group in the Bi─Te sections formed via a ligand support, which enhances the absorption capacity of H+ ions and increases the intrinsic catalytic activity. The presented insights regarding the material composition-structure relationship can help expand the application scope of high-performance catalysts.
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Affiliation(s)
- Alvira Ayoub Arbab
- School of Mechanical Engineering, Chung-Ang University, Seoul, 06974, South Korea
| | - Sehyeon Cho
- Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, 06974, South Korea
| | - Euibeen Jung
- Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, 06974, South Korea
| | - Hyun Soo Han
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Sangwook Park
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, South Korea
- Institute of Advanced Machines and Design, Seoul National University, Seoul, 08826, South Korea
- Institute of Engineering Research, Seoul National University, Seoul, 08826, South Korea
| | - Hyoungsoon Lee
- School of Mechanical Engineering, Chung-Ang University, Seoul, 06974, South Korea
- Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, 06974, South Korea
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Abstract
BACKGROUND Cancer is one of the deadliest threats to human health. Abnormal physiochemical conditions and dysregulated biosynthetic intermediates in the tumor microenvironment (TME) play a significant role in modulating cancer cells to evade or defend conventional anti-cancer therapy such as surgery, chemotherapy and radiotherapy. One of the most important challenges in the development of anti-tumor therapy is the successful delivery of therapeutic and imaging agents specifically to solid tumors. MAIN BODY The recent progresses in development of TME responsive nanoparticles offers promising strategies for combating cancer by making use of the common attributes of tumor such as acidic and hypoxic microenvironments. In this review, we discussed the prominent strategies utilized in the development of tumor microenvironment-responsive nanoparticles and mode of release of therapeutic cargo. CONCLUSION Tumor microenvironment-responsive nanoparticles offers a universal approach for anti-cancer therapy.
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Affiliation(s)
- Saji Uthaman
- Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea
| | - In-Kyu Park
- Department of Biomedical Sciences, BK21 PLUS Centre for Creative Biomedical Scientists, Chonnam National University Medical School, 160 Baekseo-ro, Gwangju, 61469 Republic of Korea
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Park J, Kim J, Kim SY, Cheong WH, Jang J, Park YG, Na K, Kim YT, Heo JH, Lee CY, Lee JH, Bien F, Park JU. Soft, smart contact lenses with integrations of wireless circuits, glucose sensors, and displays. Sci Adv 2018; 4:eaap9841. [PMID: 29387797 PMCID: PMC5787380 DOI: 10.1126/sciadv.aap9841] [Citation(s) in RCA: 262] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 12/14/2017] [Indexed: 05/19/2023]
Abstract
Recent advances in wearable electronics combined with wireless communications are essential to the realization of medical applications through health monitoring technologies. For example, a smart contact lens, which is capable of monitoring the physiological information of the eye and tear fluid, could provide real-time, noninvasive medical diagnostics. However, previous reports concerning the smart contact lens have indicated that opaque and brittle components have been used to enable the operation of the electronic device, and this could block the user's vision and potentially damage the eye. In addition, the use of expensive and bulky equipment to measure signals from the contact lens sensors could interfere with the user's external activities. Thus, we report an unconventional approach for the fabrication of a soft, smart contact lens in which glucose sensors, wireless power transfer circuits, and display pixels to visualize sensing signals in real time are fully integrated using transparent and stretchable nanostructures. The integration of this display into the smart lens eliminates the need for additional, bulky measurement equipment. This soft, smart contact lens can be transparent, providing a clear view by matching the refractive indices of its locally patterned areas. The resulting soft, smart contact lens provides real-time, wireless operation, and there are in vivo tests to monitor the glucose concentration in tears (suitable for determining the fasting glucose level in the tears of diabetic patients) and, simultaneously, to provide sensing results through the contact lens display.
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Affiliation(s)
- Jihun Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Joohee Kim
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - So-Yun Kim
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Woon Hyung Cheong
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jiuk Jang
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Young-Geun Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Kyungmin Na
- School of Electrical and Computer Engineering, UNIST, Ulsan 44919, Republic of Korea
| | - Yun-Tae Kim
- School of Life Sciences, School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Republic of Korea
| | - Jun Hyuk Heo
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chang Young Lee
- School of Life Sciences, School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Republic of Korea
| | - Jung Heon Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Corresponding author. (J.-U.P.); (F.B.); (J.H.L.)
| | - Franklin Bien
- School of Electrical and Computer Engineering, UNIST, Ulsan 44919, Republic of Korea
- Corresponding author. (J.-U.P.); (F.B.); (J.H.L.)
| | - Jang-Ung Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Corresponding author. (J.-U.P.); (F.B.); (J.H.L.)
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