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2. Retroperitoneal Tumors

Author

Sung, Chang Kyu, Kim, Bohyun, Moon, Kyung Chul, Ku, Ja Hyeon, Ha, Seung Beom, Kim, Seung Hyup, editor, and Cho, Jeong Yeon, editor

Published
2017
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3. Defect engineering of ternary Cu–In–Se quantum dots for boosting photoelectrochemical hydrogen generation

Author

Li, Shi, primary, Jung, Sung‐Mok, additional, Chung, Wookjin, additional, Seo, Joo‐Won, additional, Kim, Hwapyong, additional, Park, Soo Ik, additional, Lee, Hyo Cheol, additional, Han, Ji Su, additional, Ha, Seung Beom, additional, Kim, In Young, additional, In, Su‐Il, additional, Kim, Jae‐Yup, additional, and Yang, Jiwoong, additional

Published
2023
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7. Retroperitoneal Tumors

Author

Sung, Chang Kyu, primary, Kim, Bohyun, additional, Moon, Kyung Chul, additional, Ku, Ja Hyeon, additional, and Ha, Seung Beom, additional

Published
2016
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8. PbS Quantum Dots-Decorated BiVO 4 Photoanodes for Highly Efficient Photoelectrochemical Hydrogen Production.

Author

Seo, Joo-Won, Ha, Seung-Beom, Song, In-Cheul, and Kim, Jae-Yup

Subjects
*CRYSTAL optics, *P-N heterojunctions, *QUANTUM dots, *VISIBLE spectra, *METALLIC oxides
Abstract

While metal oxides such as TiO2, Fe2O3, WO3, and BiVO4 have been previously studied for their potential as photoanodes in photoelectrochemical (PEC) hydrogen production, their relatively wide band-gap limits their photocurrent, making them unsuitable for the efficient utilization of incident visible light. To overcome this limitation, we propose a new approach for highly efficient PEC hydrogen production based on a novel photoanode composed of BiVO4/PbS quantum dots (QDs). Crystallized monoclinic BiVO4 films were prepared via a typical electrodeposition process, followed by the deposition of PbS QDs using a successive ionic layer adsorption and reaction (SILAR) method to form a p-n heterojunction. This is the first time that narrow band-gap QDs were applied to sensitize a BiVO4 photoelectrode. The PbS QDs were uniformly coated on the surface of nanoporous BiVO4, and their optical band-gap was reduced by increasing the number of SILAR cycles. However, this did not affect the crystal structure and optical properties of the BiVO4. By decorating the surface of BiVO4 with PbS QDs, the photocurrent was increased from 2.92 to 4.88 mA/cm2 (at 1.23 VRHE) for PEC hydrogen production, resulting from the enhanced light-harvesting capability arising from the narrow band-gap of the PbS QDs. Moreover, the introduction of a ZnS overlayer on the BiVO4/PbS QDs further improved the photocurrent to 5.19 mA/cm2, attributed to the reduction in interfacial charge recombination. [ABSTRACT FROM AUTHOR]

Published
2023
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9. Quantum Dots, Passivation Layer and Cocatalysts for Enhanced Photoelectrochemical Hydrogen Production.

Author

Kim, Hwapyong, Choe, Ayeong, Ha, Seung Beom, Narejo, Ghulam Mustafa, Koo, Sung Wook, Han, Ji Su, Chung, Wookjin, Kim, Jae‐Yup, Yang, Jiwoong, and In, Su‐Il

Subjects
QUANTUM dots, HYDROGEN production, PASSIVATION, SURFACE recombination, CHARGE transfer, SURFACE charges
Abstract

Solar‐driven photoelectrochemical (PEC) hydrogen production is one potential pathway to establish a carbon‐neutral society. Nowadays, quantum dots (QDs)‐sensitized semiconductors have emerged as promising materials for PEC hydrogen production due to their tunable bandgap by size or morphology control, displaying excellent optical and electrical properties. Nevertheless, they still suffer from anodic corrosion during long‐term cycling, offering poor stability. This Review discussed advancements to improve long‐term stability of QDs particularly in terms of cocatalysts and passivation layers. The working principle of PEC cells was reviewed, along with all important configurations adopted over recent years. The equations to assess PEC performance were also described. A greater emphasized was placed on QDs and incorporation of cocatalysts or passivation layers that could enhance the PEC performance by influencing the charge transfer and surface recombination processes. [ABSTRACT FROM AUTHOR]

Published
2023
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16. Impact of Detrusor Underactivity on Surgical Outcomes of Laser Prostatectomy: Comparison in Serial 12-Month Follow-Up Outcomes Between Potassium-Titanyl-Phosphate Photoselective Vaporization of the Prostate (PVP) and Holmium Laser Enucleation of the Prostate (HoLEP)

Author

Cho, Min Chul, primary, Ha, Seung Beom, additional, Park, Juhyun, additional, Son, Hwancheol, additional, Oh, Seung-June, additional, Kim, Soo Woong, additional, and Paick, Jae-Seung, additional

Published
2016
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22. 925 LIMITED PREDICTIVE VALUES OF PROSTATE BIOPSY AND MRI TO THE LATERALITY OF CLINICALLY LOCALIZED PROSTATE CANCER

Author

Jeong, Chang Wook, primary, Cho, Min Chul, additional, Park, Yong Hyun, additional, Baik, Seung, additional, Ha, Seung Beom, additional, Jeong, Hyeon, additional, Lee, Seung Bae, additional, Ku, Ja Hyeon, additional, Hong, Sung Kyu, additional, Byun, Seok-Soo, additional, Kwak, Cheol, additional, Kim, Hyeon Hoe, additional, and Lee, Sang Eun, additional

Published
2010
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