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
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
Chemistry, Physical
E. Krishnan Vishnu, Anoop Ajaya Kumar Nair, K. George Thomas
Summary: The study investigates the photoluminescence fluctuations in CdSe QDs by varying core size and maintaining constant shell thickness. Increase in core size leads to enhanced detrapping rate and higher photoluminescence efficiency.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xiaolan Zhou, Chaodan Pu
Summary: Surface reconstruction is used to synthesize nonpolar facets CdSe/CdS core/shell quantum dots with a dodecahedral zinc-blende structure. The successful surface reconstruction is found to be assisted by a proton shuttle.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
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
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
Nanoscience & Nanotechnology
Yanbing Lv, Yucheng Yuan, Ning Hu, Na Jin, Dangdang Xu, Ruili Wu, Huaibin Shen, Ou Chen, Lin Song Li
Summary: This study presents a synthesis method for ultra-thick shell quantum dots and their application in C-reactive protein detection, achieving nearly a 3-fold enhancement in detection sensitivity and a 2-fold increase in shelf life. The performance improvements in protein detection are attributed to the use of core/shell quantum dots with high particle stability, high PL QYs, and a large surface area conducive to surface antibody coupling.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Andrew B. Pun, Aniket S. Mule, Jacob T. Held, David J. Norris
Summary: The research team successfully grew thin CdS shells on CdSe MSNC cores via high-temperature synthesis, dramatically improving the emissive properties of the MSNCs. Thicker CdS shells result in decreased performance, but CdxZn1-xS alloyed shells maintain efficient and narrow emission lines.
Article
Chemistry, Multidisciplinary
Xinke Kong, Lin Ru, Junjun Ge, Yalei Deng, Pan-Ke Zhang, Yuanyuan Wang
Summary: Researchers observed and monitored a ligand-assisted phase transition process from zinc blende to wurtzite in CdSe nanoplatelets. They proposed a new crystal transformation pathway and elucidated a general phase-transition mechanism, which facilitates precise functional nanomaterial design.
Article
Chemistry, Physical
Justine Baronnier, Benoit Mahler, Olivier Boisron, Christophe Dujardin, Florian Kulzer, Julien Houel
Summary: Fully inorganic gradient-shell CdSe/CdZnS nanocrystals with high luminescence quantum yield were synthesized by replacing native oleic-acid ligands with halide ions, showing stability in solution and potential application in opto-electronic devices. The research findings suggest promising prospects for incorporating these nanocrystals into various devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Applied
Jialin Wu, Lixiang Chen, Yongshuang Zhao, Zuhong Xiong, Wenyu Ji, Yanlian Lei
Summary: The temperature-dependent electroluminescence properties of quantum dots (QDs) were systematically studied, showing enhanced EL intensity and efficiency with a blue shift in spectra at lower temperatures. The behaviors mainly originated from the inherent properties of QDs, with different device structures inducing minor temperature-dependent effects. Effective Joule heat dissipation at low temperatures helps protect charge transport and QD layers, prolonging device lifetime.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Hong Li, Jinxu Jiao, Qi Ye, Zhixin Wu, Donglian Luo, Dehua Xiong
Summary: The successful synthesis of CdSe/ZnS core-shell QDs and the important effects of reaction time and oleic acid dosage on their optical properties were highlighted. Furthermore, highly efficient green QLEDs were fabricated using a rotary coating method on an ITO glass substrate.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(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
Chemistry, Physical
Hongyu Yang, Lei Zhang, Ying Tang, Wenbin Xiang, Xiaoyong Wang, Min Xiao, Yiping Cui, Jiayu Zhang
Summary: The penetration growth of a ZnS shell on CdZnSeS/ZnS alloy core/shell quantum dots improves the multiexciton property of the dots, but further shell growth can lead to interface defects deterioration. Quantum dots with a three-monolayer ZnS shell demonstrate the best performance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Il Seung Youn, Dong Yeon Kim, Woo Jong Cho, Jenica Marie L. Madridejos, Han Myoung Lee, Maciej Kolaski, Joonho Lee, Chunggi Baig, Seung Koo Shin, Michael Filatov, Kwang S. Kim
JOURNAL OF PHYSICAL CHEMISTRY A
(2016)
Article
Biochemistry & Molecular Biology
Hye Jin Ham, Jongcheol Seo, Hye-Joo Yoon, Seung Koo Shin
JOURNAL OF LIPID RESEARCH
(2017)
Article
Chemistry, Physical
Hwajun Jeong, Seung Koo Shin
CHEMICAL PHYSICS LETTERS
(2018)
Article
Chemistry, Multidisciplinary
Jongcheol Seo, Seung Joon Kim, Seung Koo Shin
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2014)
Article
Chemistry, Physical
Sung Jun Lim, Wonjung Kim, Sunghan Jung, Jongcheol Seo, Seung Koo Shin
CHEMISTRY OF MATERIALS
(2011)
Article
Physics, Atomic, Molecular & Chemical
Jongcheol Seo, Eun Sun Hong, Hye-Joo Yoon, Seung Koo Shin
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2012)
Article
Chemistry, Physical
Jongcheol Seo, Seung-Joon Kim, Seung Koo Shin
JOURNAL OF PHYSICAL CHEMISTRY A
(2013)
Article
Chemistry, Physical
Jongcheol Seo, Min-Soo Suh, Hye-Joo Yoon, Seung Koo Shin
JOURNAL OF PHYSICAL CHEMISTRY B
(2012)
Article
Chemistry, Multidisciplinary
Sung Jun Lim, Wonjung Kim, Seung Koo Shin
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2012)
Review
Spectroscopy
Young-Pil Kim, Hyun Kyong Shon, Seung Koo Shin, Tae Geol Lee
MASS SPECTROMETRY REVIEWS
(2015)
Editorial Material
Spectroscopy
Seung Koo Shin
MASS SPECTROMETRY REVIEWS
(2015)
Review
Spectroscopy
Hye-Joo Yoon, Jongcheol Seo, Seung Koo Shin
MASS SPECTROMETRY REVIEWS
(2015)
Article
Chemistry, Physical
Hyun Woo Kim, Young Min Rhee, Seung Koo Shin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Physics, Atomic, Molecular & Chemical
Jongcheol Seo, Hye-Joo Yoon, Seung Koo Shin
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2019)
Article
Chemistry, Multidisciplinary
Sung Jun Lim, Wonjung Kim, Seung Koo Shin
ADVANCED MATERIALS INTERFACES
(2020)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)