Article
Nanoscience & Nanotechnology
Yulu He, Jin Chen, Renming Liu, Yulong Weng, Cong Zhang, Yanmin Kuang, Xiaojuan Wang, Lijun Guo, Xia Ran
Summary: This study reports the suppressed blinking, enhanced radiative rate, and polarization-dependent emission properties of single ZnCdSe/ZnS QDs assembled on the surface of Au nanorods. The local surface plasmon (LSP) of Au nanorods significantly regulates the excitation and emission properties of the composite QD-Au NRs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Yahui He, Yao Zhu, Siyuan Wang, Haixiang Wang, Aijin Ma, Jing Wang, Baoguo Sun
Summary: This study developed a novel ZnCdSe/ZnS@MIPs@PES membrane for rapid detection of PRL. The membrane effectively addressed the challenges presented by QDs@MIPs particles in liquids and allowed accurate content determination without pre-treatment. The technique demonstrated enhanced enrichment and purification functionality, significantly reducing analysis duration and operational procedure.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Victor Nadtochenko, Sergei Kochev, Yurii Kabachii, Andrei Kostrov, Fedor Gostev, Ivan Shelaev, Arseniy Aybush, Alexandr Vasin, Andrei Titov, John Kiwi
Summary: The Zn0.34Cd0.66S alloy nanoparticles exhibit high photocatalytic activity for hydrogen production from water with a reaction rate of 233 +/- 9 mu mol h(-1) g(-1) in the presence of ascorbic acid as a sacrificial electron donor. The Zn0.34Cd0.66S/ZnS alloy with a ZnS shell shows a significantly lower yield compared to the ZnCdS/ZnS alloy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Yuan Liu, Cong Zhao, Jingzhou Li, Shixi Zhao, Xiaomin Xu, H. Y. Fu, Cunjiang Yu, Feiyu Kang, Guodan Wei
Summary: The high-performance photodetectors based on environmentally benign CuInS2/ZnS core-shell quantum dots, in combination with organic blend films, achieve efficient energy transfer and charge separation, leading to low dark current and high detectivity. This work demonstrates a feasible strategy to develop highly sensitive photodetectors using heavy-metal-free core-shell quantum dots.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Optics
Roberto Masahiko Aoki, Everton Tiago dos Santos Torres, Joao Paulo Almirao de Jesus, Sidney Alves Lourenco, Ricardo Vignoto Fernandes, Edson Laureto, Marco Aurelio Toledo da Silva
Summary: The study successfully improved the photovoltaic performance of organic solar cells by applying cadmium sulfide quantum dots as a luminescence down-shifting layer. The use of this new material in organic photovoltaic devices resulted in higher power conversion efficiency during exposure to light.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Bin Bin Jin, Shu Ying Kong, Guo Qing Zhang, Xing Qiao Chen, Hong Shan Ni, Fan Zhang, Dan Jun Wang, Jing Hui Zeng
Summary: The study focuses on inhibiting interfacial charge recombination in CdSe QDSSCs by constructing a ZnS/QDs/ZnS double-layer barrier structure and applying an electric field in VASILAR, achieving higher efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Zhiwen Yang, Gongli Lin, Jieyu Bai, Lechen Li, Yangbin Zhu, Liangrui He, Zhao Jiang, Weijie Wu, Xujiang Yu, Fushan Li, Wanwan Li
Summary: This research presents an efficient method for preparing high color purity inkjet-printed QLEDs using blue InP quantum dots as the emitting layer. The method involves optimizing the core size and shell thickness to achieve high PL quantum yield and suppress energy transfer, which can facilitate the development of large-area electroluminescent full-color displays.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Linhui Luo, Yun Lei, Peng Du, Yongqin Wang, Can Li, Beibei Du, Yuncui Wu
Summary: This study successfully synthesized core-shell quantum dots and investigated the effects of core-shell structure and N-GQDs on material performance. The results showed that both the core-shell structure and N-GQDs enhanced the photoelectric characteristics of the material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Asmae El Aouami, Kawtar Feddi, Maykel Courel, Francis Dujardin, David Laroze, Laura M. Perez, Mimoun Zazoui, El Mustapha Feddi
Summary: The study examines the impact of quantum dot size on CdSe/ZnS and InP/ZnS quantum dot solar cells, emphasizing the critical importance of controlling quantum dot size for high efficiency. The results demonstrate that open-circuit voltage is weakly dependent on dot size for both systems, while short-circuit current density increases with dot size. Maximum efficiency values of 31.73% and 32.90% are achieved for CdSe/ZnS and InP/ZnS, respectively, under full concentrated light for a dot size of 2.3 nm, showcasing the potential of these proposed heterostructures.
Article
Spectroscopy
Yan-Fei He, Jian-Wei Chen, Chang-Zhi An, Xiao-Lin Hou, Zi-Tao Zhong, Chao-Qing Li, Wei Chen, Bo Liu, Yuan-Di Zhao
Summary: In this study, CdSe/ZnS quantum dots with a particle size of 5.5-9.3 nm were successfully synthesized, showing fluorescence emission ranging from 545-616 nm. The water-soluble QD dispersion system remained liquid under freezing conditions at -20 degrees C with a fluorescence intensity increase and a quantum yield of 79% at -20 degrees C. Utilizing QDs, effective labeling of hepatic sinusoid endothelial cells was achieved with a labeling efficiency as high as 97%, indicating promising applications in microscopic liver section tomography.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Maryam Ostadebrahim, Hossein Dehghani
Summary: In this study, the influence of ZnS, ZnSe, and ZnSxSe1-x layers in CdSexS1-x quantum dot based solar cells was systematically investigated, with ZnS and ZnS0.2Se0.8 identified as the optimal choices. The designed QDSSCs with these layers showed a significantly higher efficiency compared to bare QDSSCs.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Shanshan Ding, Julian A. Steele, Peng Chen, Tongen Lin, Dongxu He, Chengxi Zhang, Xiangqian Fan, Eduardo Solano, Andrew K. Whittaker, Mengmeng Hao, Lianzhou Wang
Summary: This study demonstrates the surface passivation of formamidinium lead iodide quantum dots (QDs) by introducing tailored multifunctional ligands (glycocyamine (GLA)), leading to improved energy band alignment and enhanced device performance. The use of GLA ligands reduces non-radiative recombination loss and promotes favorable charge transport. This results in a record-high power conversion efficiency (PCE) of 15.34% and improved device stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Di Zhang, Sidong Zhang, Yanyan Fang, Dongmei Xie, Xiaowen Zhou, Yuan Lin
Summary: Introducing bifunctional linkers between TiO2 electrodes and quantum dots was an effective approach for the preparation of quantum dot-sensitized solar cells. Three types of linkers were studied, with phenyl MBA-TiO2 electrodes achieving the highest Cd content and PCE. The modified TiO2 electrodes showed lower electron recombination rates and higher efficiency, demonstrating the importance of linker selection for QDSCs design and optimization.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Shuang'an Liu, Lidong Li, Ying Cao, Rao Fan, Peng Sun, Minsi Yu, Yucang Zhang, Wenming Zhang, Ling Li
Summary: Introducing Ga3+ into the ZnS passivation layer can optimize the photoelectric performance of quantum dot-sensitized solar cells, effectively suppressing carrier recombination and improving the power conversion efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Lilei Hu, Andreas Mandelis
Summary: Solution-processed colloidal quantum dot (CQD) solar cells have the advantages of being lightweight, flexible, and inexpensive, but their efficiency is still not high enough for commercial applications. Research is focusing on understanding and controlling charge carriers and excitons transport in CQD thin films to improve the efficiency of these solar cells. Transient techniques are commonly used to characterize the electrical parameters of CQD solar cells.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Seon Ju Park, Young Kook Moon, Sei-Woong Park, Soo Min Lee, Tae-Hyun Kim, Soo Young Kim, Jong-Heun Lee, Young-Moo Jo
Summary: Real-time breath isoprene sensing provides non-invasive methods for monitoring human metabolism and early diagnosis of cardiovascular diseases. In this work, Co3O4@polyoxometalate yolk-shell structures were derived and showed selective isoprene detection with high chemiresistive response and low detection limit. The sensor's high performance is attributed to electronic sensitization and catalytic promotion effects, and its practical feasibility is demonstrated in smart healthcare applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
In Hyuk Im, Seung Ju Kim, Ji Hyun Baek, Kyung Ju Kwak, Tae Hyung Lee, Jin Wook Yang, Da Eun Lee, Jae Young Kim, Hee Ryeong Kwon, Do Yeon Heo, Soo Young Kim, Ho Won Jang
Summary: This study proposes an efficient methodology to integrate halide perovskites as functional materials for memristive crossbar arrays. By controlling the doping concentration of Ag in MAPbI(3), the resistance change characteristics can be tailored. The results show that MAPbI(3) with different Ag contents can achieve different threshold and resistive switching characteristics. Finally, by coupling these switches into 1S-1R integrated components, a larger crossbar array size is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jin Hyuk Cho, Chaehyeon Lee, Sung Hyun Hong, Ho Yeon Jang, Seoin Back, Myung-gi Seo, Minzae Lee, Hyung-Ki Min, Youngheon Choi, Youn Jeong Jang, Sang Hyun Ahn, Ho Won Jang, Soo Young Kim
Summary: This study demonstrates the efficient electrocatalytic conversion of CO2 to CO using zeolite-imidazolate-frameworks-8 (ZIF-8) doped with transition metal ions (Ni, Fe, and Cu). The optimized Cu-doped ZIF-8 showed high partial current density and maximum Faradaic efficiency, with stable catalytic activity. The study also provides insights into the CO2 reduction pathway.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Tuan Van Nguyen, Thang Phan Nguyen, Quyet Van Le, Dung Van Dao, Sang Hyun Ahn, Soo Young Kim
Summary: In this study, a facile, inexpensive, and scalable method for the fabrication of extremely small MoS2 NFs (SNFs) was proposed for the first time. The SNFs exhibited enhanced catalytic activity compared to conventional MoS2 NFs due to the increased number of active sites. The SNFs also showed superior electrocatalytic performance for hydrogen evolution reaction, with low Tafel slope, overpotential, and high stability in an acidic environment.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jooyoung Kim, Hyunki Kim, Sungjun Kim, Jue-Hyuk Jang, Hyuntae Sohn, Seok Jin Hong, Junhyeong Kim, Gyeong Ho Han, Seonghyun Choe, Yung-Eun Sung, Soo Young Kim, Ho Won Jang, Tae Hwan Jo, Hyung-Kyu Lim, Sung Jong Yoo, Sang Hyun Ahn
Summary: This study presents a simple electrochemical strategy to fabricate atomic Pt clusters on Au dendrites, resulting in a significantly reduced Pt loading. The prepared Pt/Au/CP sample exhibits high selectivity for formic acid oxidation reaction and maintains stable activity even after cycling tests.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Heena Garg, Shilpa Patial, Pankaj Raizada, Van-Huy Nguyen, Soo Young Kim, Quyet Van Le, Tansir Ahamad, Saad M. Alshehri, Chaudhery Mustansar Hussain, Thi Thanh Huyen Nguyen, Pardeep Singh
Summary: Formulating heterojunctions with high efficiency using solar light is a promising solution for energy and environmental crises. Hexagonal-borocarbonitride (h-BCN) based Z-schemes have gained attention as potential candidates due to their excellent oxidation and reduction properties, light-harvesting ability, charge migration and separation capabilities, and redox ability. This review discusses the current state-of-the-art in Z-scheme photocatalytic applications, including synthesis techniques, reaction mechanisms, and the use of h-BCN-based heterojunction photocatalysts in various photo-redox applications. Challenges and future directions in environmental remediation are also proposed.
Article
Energy & Fuels
Yensil Park, Melanie Moses-DeBusk, Tommy Powell, James Szybist, Zhanhong Xiang, Junqing Zhu, Charles S. McEnally, Lisa D. Pfefferle
Summary: The U.S. Department of Energy's Co-Optima initiative focuses on improving fuel economy, vehicle performance, and reducing emissions through the development of sustainable fuels and advanced combustion strategies. This study investigates the impact of different fuel properties on emissions from advanced compression ignition (ACI) and spark-ignited (SI) combustion strategies operating on the same fuels. The results show that fuel properties have a greater impact on soot PM and particle number emissions, while phasing has a greater impact on NOx emissions.
Article
Energy & Fuels
Ha Huu Do, Quyet Van Le, Jin Hyuk Cho, Sang Hyun Ahn, Soo Young Kim
Summary: In this study, various cobalt-selenide-based electrocatalysts were synthesized using selenization of nitrogen-containing Co-MOF, Co-MOF-74, and cobalt chloride salt. The CoSe2@NC derived from ZIF-67 showed the best catalytic activity for the hydrogen evolution reaction (HER). This catalyst exhibited low overvoltage, small Tafel slope, and excellent durability, indicating its potential as a noble-metal-free electrocatalyst for hydrogen production.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Ha Huu Do, Mahider Asmare Tekalgne, Quyet Van Le, Jin Hyuk Cho, Sang Hyun Ahn, Soo Young Kim
Summary: In this study, H-Ni/NiO/C catalysts were synthesized from a Ni-based metal-organic framework (MOF) and demonstrated superior electrocatalytic activity for the hydrogen evolution reaction (HER). The catalyst exhibited low overpotential and high Tafel slope, attributed to the synergistic effect of the metal/metal oxide and hollow architecture. The results suggest that this approach holds promise for the fabrication of cost-effective catalysts for hydrogen production in alkaline media.
Article
Chemistry, Multidisciplinary
Yun-Yang Lee, Eda Cagli, Aidan Klemm, Yensil Park, Ruth Dikki, Michelle K. Kidder, Burcu Gurkan
Summary: Understanding the oxidative and thermal degradation of CO2 sorbents is critical for assessing their long-term stability. The degradation pathway of imidazolium cyanopyrrolide, an ionic liquid (IL) used for CO2 capture, was evaluated to understand secondary reactions during absorption-desorption cycles. Analysis showed that the nucleophilicity of the anion encourages radical and S(N)2 mechanisms in degradation. The CO2 capacity of the IL decreased by 50% after 7 days of exposure to O-2 at 80 degrees C, but microwave regeneration at 80 and 100 degrees C prevented measurable degradation.
Article
Chemistry, Multidisciplinary
Aidan Klemm, Stephen P. Vicchio, Sanchari Bhattacharjee, Eda Cagli, Yensil Park, Muhammad Zeeshan, Ruth Dikki, Harrison Liu, Michelle K. Kidder, Rachel B. Getman, Burcu Gurkan
Summary: Choline-based amino acid ionic liquids were synthesized and mixed with ethylene glycol to form lower-viscosity benign eutectic solvents for CO2 capture. The highest capacity measured was 0.7 moles of CO2 per mole of ionic liquid. Through a combined study of spectroscopy and simulations, it was found that hydrogen bonding in the eutectic solvent prevents proton-transfer, leading to a higher binding capacity for CO2.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Tuan Van Nguyen, Thang Phan Nguyen, Quyet Van Le, Dung Van Dao, Sang Hyun Ahn, Soo Young Kim
Summary: Recently, researchers have extensively investigated catalysts based on tungsten disulfide nanoflowers (WS2 NFs) and tungsten carbide (W2C) materials for hydrogen evolution reaction (HER). In this study, a facile and scalable method was used to synthesize a nano hollow flowers catalyst based on heterostructure of WS2 and W2C (WS2/W2C NHFs). Comparative analysis of different tungsten compounds' structures and HER activities was conducted. The results show that WS2/W2C NHFs exhibits superior HER activity compared to WS2-WO3 flower particles (FPs) and pure WS2 NFs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mahider Asmare Tekalgne, Ha Huu Do, Tuan Van Nguyen, Quyet Van Le, Sung Hyun Hong, Sang Hyun Ahn, Soo Young Kim
Summary: Designing low-cost hybrid electrocatalysts for hydrogen production is important. In this study, WS2/Ti3C2 nanosheets were successfully synthesized and exhibited high electrocatalytic activity and stability in the hydrogen evolution reaction.
Article
Chemistry, Multidisciplinary
Youngho Kim, Noeul Kim, Sang Hoon Lee, Seok-Ki Hyeong, Jae-Hyun Lee, Jaeyeong Lee, Jong Seong Bae, In Sun Cho, Jae-Young Choi, Soo Young Kim, Hak Ki Yu
Summary: The development of technologies for electromagnetic wave contamination has attracted attention. For high frequencies such as those in the K and K-a ranges, there is a limitation in using only one material. To address this, it is necessary to increase the absorption coefficients by increasing the path of electromagnetic waves using internal scattering. This study accurately demonstrated the role of Sn in the growth of indium tin oxide (ITO) nano-branch structure, resulting in high-density ITO nano-branches with the thinnest possible thickness. With shielding efficiencies of 21.09 dB (K band) and 17.81 dB (K-a band), it is expected to be applied in various fields due to its high specific shielding efficiency, low thickness, and weight.
Article
Chemistry, Multidisciplinary
Sa-Rang Bae, Myeong Jin Seol, Soo Young Kim
Summary: This article demonstrates the fabrication of perovskite thin film through vacuum deposition and its application in LED devices. With the optimization of dopant ratio, the efficiency and characteristics of the device are significantly improved. The research results are expected to contribute to the future development of perovskite LED research.
