Article
Chemistry, Physical
Jiajia Ning, Yuan Xiong, Stephen Kershaw, Andrey L. Rogach
Summary: The most efficient way to improve the stability and optical properties of nanocrystals is to grow shell around their cores. Different growth modes of the ZnS shell on ZnSe nanorods were observed depending on the crystal structure of the ZnSe core, leading to differences in photoluminescence quantum yield.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xue Bai, Finn Purcell-Milton, Yurii K. Gun'ko
Summary: Cu-Based quantum dots are being explored as a potential replacement for toxic Cd- or Pb-based QDs, with studies focusing on the impact of different reaction conditions on the resulting morphologies and optical properties. By carefully controlling the ZnS shell deposition, researchers have optimized the synthesis of CIZS/ZnS/ZnS QDs and produced highly fluorescent core/shell/shell heterostructured QDs with high PLQYs. Additionally, the successful creation of giant ZnS shell QDs opens up possibilities for further development in this area.
Article
Chemistry, Physical
Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Ruiqing Ma, David F. Kelley, Anne Myers Kelley
Summary: Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals were obtained at different excitation wavelengths, revealing differences in phonon features attributed to various stoichiometries of the structures. The presence of excess indium in the ZnSe shell was found to influence the Raman intensities and frequency distributions, supporting previous assignments of hole trapping at indium defects in the shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
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
Chemistry, Analytical
Yu-Ting Yang, Jia-Li Liu, Man-Fei Sun, Ruo Yuan, Ya-Qin Chai
Summary: A novel electrochemiluminescence biosensor based on MnS:CdS@ZnS QDs was developed for ultrasensitive detection of miRNA let-7a. The biosensor exhibited high stability and excellent sensitivity, with a detection limit as low as 4.1 aM.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiaoyan Li, Chaojin Xuan, Boxu Yang, Weichen Wang, Mingzhong Wang, Xiaopeng Zhao
Summary: In this paper, center-doped monodisperse Cu-doped ZnSe (ZnSe:Cu) quantum dots are synthesized by co-nucleation doping method, and then a double-layered ZnS shell is grown on the QDs. The prepared ZnSe:Cu/ZnS/ZnS QDs exhibit high photoluminescence intensity and excellent stability in the blue region. The stability is attributed to the ZnS shell grown outside the ZnSe:Cu core, which effectively limits excitons and Cu and isolates O2. This work provides a new approach to enhance the stability of quantum dots.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: This study compares the ultrafast carrier dynamics in InP/ZnSe/ZnS core/shell/shell quantum dots (CSS-QDs) and InP/ZnS core/shell QDs (CS-QDs), revealing the impact of the ZnSe midshell on carrier dynamics. The results show that the ZnSe midshell enhances electron delocalization, prolongs the in-band relaxation time of electrons and holes, and reduces defect emissions. Additionally, the ZnSe midshell leads to an increased density of higher-energy hole states, which may decrease the probability of Auger recombination.
Article
Chemistry, Physical
Vuyelwa Ncapayi, Oladoyin Famutimi, Thabang Calvin Lebepe, Rodney Malulepe, Sam Masha, Nande Mgedle, Sundararajan Parani, Tetsuya Kodama, Issac Olusanjo Adewale, Oluwatobi Samuel Oluwafemi
Summary: This paper reports the inhibitory activity of copper indium selenide/zinc sulphide core-shell quantum dots (CISe/ZnS QDs) against recombinant human furin, an enzyme implicated in the pathogenesis of many diseases, including Covid-19. The synthesized CISe/ZnS QDs showed biocompatibility against mouse colon carcinoma cells (C26) and inhibited furin with an inhibition constant (Ki) of 15.66 μM. The IC50 was 11.29 ± 0.54 μM, and the enzyme activity was abolished at an inhibitor concentration of about 23 μM, indicating the potential of CISe-ZnS QDs as an enzyme inhibitor for managing diseases involving furin hyperactivity.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2023)
Article
Optics
Yanqing Zhu, Cong Shen, Xueqing Xu, Jianhua Zou, Lei Wang, Xudong Cheng, Jingqiu Liang, Xiudi Xiao, Gang Xu
Summary: This study investigates the effect of halogen acid treatment on the luminescence properties of InP/GaP/ZnS quantum dots (QDs). It is found that hydrofluoric acid (HF) and hydrochloric acid (HCl) can improve the optical properties of QDs, while hydrobromic acid (HBr) and hydroiodic acid (HI) are not conductive to enhance the photoluminescence quantum yield (PL QY) of QDs. HF and HCl can effectively etch the oxidative layer and passivate the surface indium dangling bonds in the form of atomic ligands. The proposed charge carrier recombination model suggests that the significantly improved PL QY after acid treatment is attributed to the recombination of electron-hole pairs mainly from the conduction band and valence band. InP QDs treated with HF exhibit the best luminescence properties, with a high PL QY of 96%, offering great potential for advanced optoelectronic devices.
JOURNAL OF LUMINESCENCE
(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
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
Optics
Xia Ran, Congcong Chen, Zhongran Wei, Zhen Chi, Yatao Pan, Yanmin Kuang, Xiaojuan Wang, Lijun Guo
Summary: This study investigates the shell-dependent blinking behavior and carrier dynamics in CdxZn1-xSeyS1-y@ZnS core/shell quantum dots. The results show that the on-time fraction of blinking emission can be effectively increased by capping the ZnS shell, and the carrier dynamics exhibit dependence on the shell thickness. These findings demonstrate the importance of shell encapsulation in regulating the optical properties of quantum dots.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Liudmila Loghina, Maksym Chylii, Anastasia Kaderavkova, Stanislav Slang, Petr Svec, Jhonatan Rodriguez Pereira, Bozena Frumarova, Miroslav Cieslar, Miroslav Vlcek
Summary: The study aimed to develop an effective calculation method for determining the theoretical amount of precursors needed for the formation of a ZnS shell on the surface of a Cd0.25Zn0.75Se core. By using novel sources of sulfur and selenium, highly photoluminescent quantum dots were synthesized with controlled growth of the shell on the core surface, leading to improved photoluminescence quantum yield, size and shape uniformity, and high yield of nanomaterials. This method can potentially be scaled up for industrial applications.
Article
Chemistry, Multidisciplinary
Kai Zhang, Yue Xu, Fan Liu, Guo-Ping Yan, San-Wei Guo
Summary: Novel cooperative ZnS-CdSe@Co/N-C core/shell composites were prepared by chelation and modification, which possessed heterojunction and cocatalyst properties, and showed improved optical absorption and photocatalytic properties.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Analytical
Luping Tang, Yangyang Zhang, Chen Liao, Yingqing Guo, Yingtao Lu, Yixuan Xia, Yiwei Liu
Summary: In this study, the temperature-dependent photoluminescence (PL) properties of CdS/ZnS core/shell quantum dots (QDs) were investigated. The results showed that the band-edge emission (BEE) intensity decreased with increasing temperature, while the surface-state emission (SSE) intensity first increased and then decreased. The PL spectra exhibited a redshift in peak energies and an increase in full width at half-maximum (FWHM) as the temperature increased. Furthermore, the CIE chromaticity coordinates showed a dramatic change with temperature. These findings suggest that CdS/ZnS core/shell QDs have potential applications as temperature sensors.
Article
Nanoscience & Nanotechnology
Xiaojiao Kang, Yanchun Yang, Lan Wang, Song Wei, Daocheng Pan
ACS APPLIED MATERIALS & INTERFACES
(2015)
Article
Chemistry, Inorganic & Nuclear
Lan Wang, Xiaojiao Kang, Lijian Huang, Daocheng Pan
DALTON TRANSACTIONS
(2015)
Article
Chemistry, Physical
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Song Wei, Daocheng Pan
JOURNAL OF PHYSICAL CHEMISTRY C
(2015)
Article
Nanoscience & Nanotechnology
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Daocheng Pan
ACS APPLIED MATERIALS & INTERFACES
(2016)
Article
Chemistry, Multidisciplinary
Song Wei, Yanchun Yang, Xiaojiao Kang, Lan Wang, Lijian Huang, Daocheng Pan
CHEMICAL COMMUNICATIONS
(2016)
Article
Chemistry, Physical
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Song Wei, Daocheng Pan
JOURNAL OF POWER SOURCES
(2016)
Article
Chemistry, Inorganic & Nuclear
Lan Wang, Xiaojiao Kang, Daocheng Pan
INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Inorganic & Nuclear
Song Wei, Yanchun Yang, Xiaojiao Kang, Lan Wang, Lijian Huang, Daocheng Pan
INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Analytical
Hua Wu, Renjie Liu, Xiaojiao Kang, Chengyun Liang, Lei Lv, Zhijun Guo
Article
Chemistry, Applied
Lei Lv, Yongdong Jin, Xiaojiao Kang, Yangyang Zhao, Chengbi Cui, Zhijun Guo
Article
Chemistry, Physical
Wei Lu, Huawei Xu, Mingming Hao, Hongcheng Wang, Xiaojiao Kang
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Chemistry, Analytical
Renjie Liu, Hua Wu, Lei Lv, Xiaojiao Kang, Chengbi Cui, Jin Feng, Zhijun Guo
Article
Materials Science, Multidisciplinary
Xiaojiao Kang, Wei Lu, Hongcheng Wang, Dongxiong Ling
MATERIALS RESEARCH BULLETIN
(2018)
Article
Chemistry, Multidisciplinary
Xiaojiao Kang, Song Lu, Hongcheng Wang, Dongxiong Ling, Wei Lu
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.
