Article
Chemistry, Multidisciplinary
Volodymyr Dzhagan, Nazar Mazur, Olga Kapush, Oleksandr Selyshchev, Anatolii Karnaukhov, Oleg A. Yeshchenko, Mykola I. Danylenko, Volodymyr Yukhymchuk, Dietrich R. T. Zahn
Summary: This study investigates the influence of the parameters of the shell and interface in semiconductor core/shell nanocrystals (NCs) on their optical properties and charge transfer, using Raman spectroscopy. The results show that the use of thioglycolic acid (TGA) during the synthesis leads to the formation of a CdS shell around the CdTe core in the NCs. The optical absorption and photoluminescence bands of these NCs are determined by the CdTe core, while the far-infrared absorption and resonant Raman scattering spectra are dominated by the vibrations related to the shell.
Article
Chemistry, Physical
A. Dutta, B. Pihuleac, Y. Chen, C. Zong, L. Dal Negro, C. Yang
Summary: The use of CSS plasmonic nanoparticles has shown significant enhancement in the photocatalytic performance of PEC photoanodes using hematite as a testing system. The optimized CSS NPs have demonstrated double resonance peaks and spatially uniform electric field distributions, resulting in improved photocurrent density and potential for increasing carrier generation in hematite photoelectrocatalytic systems.
MATERIALS TODAY ENERGY
(2021)
Article
Engineering, Environmental
Rab Nawaz, Sajjad Haider, Habib Ullah, Muhammad Saeed Akhtar, Salahuddin Khan, Muhammad Junaid, Nasrullah Khan
Summary: This study aimed to develop an improved photocatalytic process using visible light to remove phenol from treated palm oil mill effluent (TPOME). The synthesized black TiO2 core-shell structure (CS B-TiO2) showed higher efficiency in phenol removal compared to commercial TiO2. Optimization of the process resulted in high removal rates of phenol and COD under visible light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Qinghan Li, Ming Wang, Jinyun He, Yanwu Wang
Summary: A well-integrated BiVO4/BiOCl heterojunction was synthesized using a two-step solvothermal method, showing enhanced photocatalytic performance compared to pure BiOCl.
Article
Chemistry, Multidisciplinary
Olamide Abiodun Daramola, Xavier Siwe-Noundou, Potlaki Foster Tseki, Rui Werner Macedo Krause
Summary: CdTe quantum dots have good optical and photo-physical properties, and can be protected from toxic Cd2+ leakage by synthesizing CdTe multi-core-shells with less toxic ZnS or ZnSe shells. This study achieved a rapid synthesis of CdTe/CdSe/ZnSe multi-core-shell quantum dots with the highest emission maxima obtained in 35 minutes.
Article
Chemistry, Physical
Ben Tadgell, Ekaterina Ponomareva, Matthias Karg, Paul Mulvaney
Summary: This study systematically investigated optical models for core-shell microgels based on PNIPAM, and examined how the structural characteristics of the microgels at different states of collapse are reflected in the corresponding UV/vis extinction spectra. The results showed that a model incorporating the fuzzy morphology of the core-shell microgels gave the best agreement to experimental data.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Anna Baranowska-Korczyc, Ewelina Mackiewicz, Katarzyna Ranoszek-Soliwoda, Jaroslaw Grobelny, Grzegorz Celichowski
Summary: This study introduces core/shell Ag/SnO2 nanowires as a new photocatalyst for the rapid degradation of organic compounds under visible light. The efficient degradation process is attributed to the unique properties of Ag/SnO2 nanowires, including surface plasmon resonance effects and charge separations preventing recombination of electron-hole pairs. These properties make Ag/SnO2 nanowires suitable for designing efficient and fast photodegradation systems for organic pollutants under solar light.
Article
Physics, Multidisciplinary
M. S. Abd El-Sadek, Sahar Elnobi, H. S. Wasly, H. S. El-Sheshtawy, Amr Attia Abuelwafa
Summary: Seed-mediated growth was used to create multi-functional core/shell nanoparticles (CdTe@FeOOH) with a low reaction temperature and cost. The CdTe@FeOOH quantum dots exhibited efficient photoluminescence and electron transfer, making them suitable for photocatalytic applications.
Article
Chemistry, Physical
Xuanyu Zhang, Shuyu Xiao, Zhihang Guo, Baozhen Yuan, Xiongbin Wang, Samo Zhang, Yueqing Shi, Guichuan Xing, Tingchao He, Rui Chen
Summary: It is found that constructing core-shell structure of FAPbBr(3)/CsPbBr3 nanocrystals can enhance the action cross section of high-order multiphoton absorption. Fluorescence induced by up to five-photon absorption was observed. The increased dielectric constant promotes modulation of multiphoton absorption effects through the local field effect, and the quasi-type-II band alignment suppresses the biexciton Auger recombination, ensuring stronger multiphoton absorption induced fluorescence. Furthermore, the core-shell structure reduces defect density and promotes nonradiative energy transfer through the antenna-like effect. This work provides a new avenue for the development of high-performance multiphoton excited nanomaterials for future photonic integration.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Sourav Kumar Kajli, Debdutta Ray, Somnath C. Roy
Summary: One-dimensional nanostructures such as nanowires exhibit enhanced photoresponse compared to bulk materials due to unidirectional transport reducing recombination and scattering of charge carriers. CuO and Cu2O are promising transition metal oxides for efficient UV and visible light detection, forming type-II heterojunction for charge separation. Core-shell CuO/Cu2O nanowires show superior performance in terms of responsivity and detectivity, attributed to the Ohmic junction at Pd-Cu2O interface and type II heterojunction at CuO/Cu2O interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
S. Hertilli, N. Yahyaoui, N. Zeiri, S. Saadaoui, M. Said
Summary: In this paper, a model for simulating the electronic and nonlinear optical properties in CdTe/ZnTe core/shell materials and inverted structure is proposed. The effects of size and eccentricity on the third-order nonlinear optical susceptibility are investigated, showing significant changes in the polarization rate.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Andrei Mitrofanov, Anatol Prudnikau, Francesco Di Stasio, Nelli Weiss, Rene Huebner, Anna Maria Dominic, Konstantin B. L. Borchert, Vladimir Lesnyak, Alexander Eychmueller
Summary: This study successfully synthesized core/shell NPLs containing 0D CdxHg1-xSe domains in CdSe NPLs, and coated them with a CdyZn1-yS shell while preserving their 2D morphology. The NPLs exhibit bright photoluminescence in the near-infrared range with high quantum yields, making them a promising material for light-emitting applications.
CHEMISTRY OF MATERIALS
(2021)
Article
Optics
E. Irani, E. Yazdani, A. Bayat
Summary: The structural and optical properties of high luminescent CdTe/CdS core/shell quantum dots in a stable, aqueous medium have been investigated, revealing wavelength tunability by adjusting the shell thickness. A 10 nm shell thickness for CdS showed higher photoluminescence quantum yield and improved optical nonlinearities compared to CdTe quantum dots and CdTe/CdS core/shell quantum dots with 16 nm thickness.
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
Tianyi Hang, Jiajia Zheng, Yifan Zheng, Shaohua Jiang, Lijie Zhou, Zhaoxun Sun, Xiping Li, Guoxiu Tong, Yiming Chen
Summary: Developing high-performance electromagnetic functional materials is necessary for eliminating electromagnetic pollution. In this study, wheat-like conductive and magnetic silver nanowire@nickle (AgNW@Ni) composites were fabricated with adjustable electromagnetic properties. The optimal composite showed excellent impedance matching, long-term stability, and potential for real electromagnetic protection applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuewei Yao, William E. Buhro
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Calynn Morrison, Haochen Sun, Yuewei Yao, Richard A. Loomis, William E. Buhro
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Chenguang Ji, William E. Buhro
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
William M. Sanderson, Jessica Hoy, Calynn Morrison, Fudong Wang, Yuanyuan Wang, Paul J. Morrison, William E. Buhro, Richard A. Loomis
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Physical
Haochen Sun, William E. Buhro
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
William M. Sanderson, Fudong Wang, Joshua Schrier, William E. Buhro, Richard A. Loomis
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Physical
Yang Zhou, Fudong Wang, William E. Buhro
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Haochen Sun, William E. Buhro
Summary: The ligand-exchange chemistries of wurtzite (WZ) and zinc-blende (ZB) CdTe nanoplatelets exhibit contrasting behaviors, which are consistent with their facet structures. WZ nanoplatelets prefer nonpolar facets and neutral ligation, while ZB nanoplatelets prefer polar, cationic facets and anionic ligation.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Paul Cavanaugh, Haochen Sun, Ilan Jen-La Plante, Maria J. Bautista, Christian Ippen, Ruiqing Ma, Anne Myers Kelley, David F. Kelley
Summary: In this study, time-correlated single photon counting was used to investigate the radiative dynamics of InP/ZnSe/ZnS core/shell/shell quantum dots with varying amounts of excess indium. The results show that QDs with excess indium exhibit different luminescence kinetics, attributed to the transient population of indium-based hole traps in the ZnSe shell. This indicates a complex interplay between shell thickness, core/shell interfaces, and the distribution of indium-based hole traps within the QDs.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Haochen Sun, Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Maria Bautista, Ruiqing Ma, David F. Kelley
Summary: Transient absorption and time-resolved photoluminescence spectroscopies were used to study the hole tunneling and Auger dynamics in high-quality InP/ZnSe/ZnS quantum dots. The study revealed that trapped holes can tunnel into the valence band, converting one type of biexciton to another type.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hailey M. Meyer, Calynn E. Morrison, Richard A. Loomis, William E. Buhro
Summary: This study successfully exchanged different metal dithiocarbamate ligands with CdSe quantum belts, and it was found that these ligands bind to the quantum belt surfaces as X-type ligands through coordination, without imparting any special electronic effects to the quantum belts.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
William E. Buhro, Chenguang Ji
Summary: Two-phase ligand exchange can convert the amine-ligated nanoplatelets to NMF-ligated ones, and further ligand exchange can lead to halometallate-ligated CdSe nanoplatelets. Analysis of the absorption spectra and X-ray diffraction data confirms the intact, Z-type binding of the halometallates.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Hailey M. Meyer, Jie Chen, Richard A. Loomis, William E. Buhro
Summary: This study investigates the ligand-exchange reactions of wurtzite CdSe quantum platelets and quantum belts with methyl viologen and its derivative ligands. It is found that the photoluminescence of the quantum platelets and quantum belts is quenched after partial ligand exchange. The ligand substitution occurs mainly on the thin edges of the platelets and belts. The derivative ligands MV2+(CH2)nNH(2) are more efficient in quenching the photoluminescence compared to the parent MV2+ ion. Furthermore, electron transfer to the derivative ligands only occurs at the polar facets of the CdSe platelets and belts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
