Article
Chemistry, Physical
Aysha Rani, Susanta Chakraborty, Aloka Sinha
Summary: The study demonstrates that doping of QDs effectively traps two kinds of ions, while the ion releasing phenomenon occurs only for one type of ion with high doping concentration. The effective interaction between QD ligands and molecules creates a tactoid-like ellipsoidal shape of the nanoparticles, enhancing the mobile ion density in the higher doped samples. Additionally, the diffusive motion of ions varies linearly with temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Jiyong Kim, Hyung Seok Choi, Armin Wedel, Suk-Young Yoon, Jung-Ho Jo, Hyun-Min Kim, Chul-Jong Han, Hong-Joo Song, Jeong-Min Yi, Jong-Shik Jang, Hannes Zschiesche, Bum-Joo Lee, Kyoungwon Park, Heesun Yang
Summary: The study explores a method for strain-engineered highly emissive InP:Cu/Zn-Cu-In-S (ZCIS)/ZnS core/shell/shell QDs synthesis via a one-pot approach, achieving the highest-ever PL QYs.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Xue Bai, Finn Purcell-Milton, Daniel K. Kehoe, Yurii K. Gun'ko
Summary: In recent years, copper based ternary and quaternary quantum confined nanostructures have gained significant attention for their potential applications, but anisotropic nanoheterostructures of this type are still poorly explored. The preparation of new fluorescent multicomponent Cu-In-(Zn)-S/ZnS nanoheterostructures with a unique anisotropic ice-cream cone like morphology using seeded growth technique has been reported, showing distinct photophysical properties with maximum emission in the visible range.
SCIENTIFIC REPORTS
(2022)
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
Nanoscience & Nanotechnology
O. Kuzyk, O. Dan'kiv, R. Peleshchak, I. Stolyarchuk
Summary: A model of spherical quantum dot of the core/multilayer shell type, taking into account the mismatch between lattice parameters and pressure due to surface curvature, was constructed. The influence of external pressure on the band structure of a CdSe-core/ZnS/CdS/ZnS-shell quantum dot was investigated using the deformation potential method. It was found that the optical band gap width of the quantum dot can be changed in a wide range by adjusting the thickness of the shell layers and the amount of pressure. Additionally, a critical value of comprehensive pressure was observed for small CdSe QD cores, above which the value of baric coefficient decreases abruptly. The thickness of the CdS layer in the shell also affected the critical pressure.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Liang Zhang, Lei Wang
Summary: This paper presents a scheme based on Spearman rank correlation coefficient to optimize site investigation in slope design, optimizing the locations and total number of boreholes. Conditional random field simulations are performed to consider the effect of borehole data on the estimation of soil property distribution. The proposed method is effective in accurately estimating slope characteristics and improving the ability to withstand risks.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Chemistry, Multidisciplinary
Shaojie Liu, Yufei Shu, Meiyi Zhu, Haiyan Qin, Xiaogang Peng
Summary: Most bulk semiconductors show an increase in band-gap energy with decreasing temperature. However, semiconductor quantum dots (QDs) exhibit non-monotonic temperature dependence of the emission energy at low temperatures. This study uses stable and efficient CdSe/CdS/ZnS QDs as a model system to quantitatively explain the origins of the anomalous emission red-shift at temperatures below 40 K. The red-shift is attributed to the temperature-dependent population of band-edge exciton fine levels, enhanced electron-optical phonon coupling due to increasing population of dark excitons, and temperature-dependent electron-acoustic phonon coupling.
Article
Environmental Sciences
Wenqian Kong, Xingwang Hou, Linfeng Wei, Weifang Chen, Jiyan Liu, Jerald L. Schnoor, Guibin Jiang
Summary: In this study, pumpkin and rice seedlings were exposed to two different types of CdSe/ZnS quantum dots (QDs) to analyze their uptake, translocation, and transformation behaviors in plants. The results showed that both QDs were mainly absorbed by the roots in particulate state, with CdSe/ZnS-CA accumulating more than CdSe/ZnS-PEG-COOH. Surface charges and coatings significantly affected the initial accumulation of QDs, but the impact decreased over time. The ratios of Cd and Se concentrations in stems and leaves differed from QD standards, indicating QD transformation in the exposure system. Se and Cd were more likely to translocate in CdSe/ZnS-PEG-COOH-treated plants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Ja-Jung Koo, Kwang Hwan Jung, Kyungsu Park, Won Ja Min, Kyu-Sang Yu, Zee Hwan Kim, Jin-Kyu Lee
Summary: In this study, the interfacial structures of CdSe/ZnS QDs were investigated using TOF-MEIS. The results showed the existence of an alloyed layer at the interface between CdSe and ZnS in typical CdSe/ZnS QDs. The dissolution of CdSe seeds during the synthesis steps was identified as the cause of this interfacial alloying, and the ligand environment of the solvent was found to influence the shape of the interface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Computer Science, Artificial Intelligence
Nayan Ranjan Das, Subhrojit Ghosh, Imon Mukherjee, Goutam Paul
Summary: This research proposes a new method for ranking cricket teams, which takes into account not only their winning and losing records, but also various batting and bowling performances, as well as other factors such as coin toss and home ground advantage. By constructing effective features and using the Consistency Index Rank (CIR) method, a more accurate ranking of cricket teams can be achieved.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Jiangzhi Zi, Yueqi Zhong, Zhao Li, Fan Wu, WeiWei Yang, Zichao Lian
Summary: Photoinduced carrier transfer pathways play a role in the optical and electronic properties of nanomaterials for photocatalytic H-2 evolution, while defects in semiconductor nanocrystals can enhance our understanding of photocatalytic mechanisms. CdSe/ZnS HNPLs with anomalous type-I hole transfer exhibit advantages in efficient charge separation and photocatalytic H-2 evolution, compared to type-II CdSe/ZnSe HNPLs and pristine CdSe NPLs. These results elucidate the role of defect-mediated carrier transfer in visible-light-driven photocatalytic H-2 evolution.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Optics
Ziwei Li, Wen Yang, Ming Huang, Xin Yang, Chenguang Zhu, Chenglin He, Lihui Li, Yajuan Wang, Yunfei Xie, Zhuoran Luo, Delang Liang, Jianhua Huang, Xiaoli Zhu, Xiujuan Zhuang, Dong Li, Anlian Pan
Summary: Mix-dimensional van der Waals heterostructures have attracted worldwide interest in advanced electronics and optoelectronics. This study investigates light-triggered interfacial charge behaviors and enhanced optoelectronic performances in type-II 0D-2D CdSe/ZnS quantum dots/MoS2 vdWHs, providing strong evidence of efficient charge transfer at the 0D-2D interface. The results demonstrate the feasibility of using light-induced charge transfer to optimize the performance of optoelectronic devices.
OPTO-ELECTRONIC ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
Lin -Song Li, Zhi-Qiang Zhang, Yanbin Zhang, Yong-Fang Liu, Mei-Xia Zhao
Summary: In this study, the research team developed a CdSe/ZnS quantum dot nano-drug delivery system that efficiently inhibited the proliferation of various cancer cells. The system exerted anti-cancer effects through the regulation of reactive oxygen species and protein expression, and showed promising therapeutic efficacy and biosafety in a mouse model.
MATERIALS & DESIGN
(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.
