Article
Chemistry, Physical
Jannik Rebmann, Hans Werners, Florian Johst, Marcel Dohrmann, Yannic U. Staechelin, Christian Strelow, Alf Mews, Tobias Kipp
Summary: Cation exchange occurs during the synthesis of colloidal semiconductor heteronanoparticles, affecting their band gap and optoelectronic properties. The role of cation exchange during the growth of anisotropic dot-in-rod structures was studied. The dominant process in the initial stages of the shell-growth reaction was found to be cation exchange from ZnSe to CdSe.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Daniel Zambo, Anja Schlosser, Rebecca T. Graf, Pascal Rusch, Patrick A. Kissling, Armin Feldhoff, Nadja C. Bigall
Summary: This article demonstrates a method for preparing hybrid nanoparticle networks from aqueous nanocrystal solutions, showing synthetic control over a variety of hybrid nanostructures. The optical features are studied to reveal charge carrier separation and controllable fluorescence quenching, emphasizing the importance of fine-tuning the conduction band/Fermi level offset. This procedure provides a novel platform for preparing photo(electro)catalytically promising hybrid nanostructures without the need of presynthetic hybrid particle design.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yinshuan Ren, Zhufeng Zhang, Guoya Xie, Xuefeng Li
Summary: Two novel CdS- and Cr-doped CdS nanostructures, including nanoparticles and nanorods, were successfully synthesized by solvothermal reaction with mixed solvents in different sulfur and cadmium sources. The Cr-doped CdS nanorods exhibited super strong ferromagnetism at room temperature, while pure CdS nanorods showed weak ferromagnetism. The prepared Cr-doped CdS nanorods had a saturation magnetization M_s of approximately 9.125 (10(-3)emu/g) and a coercivity of H_c of approximately 139.22Oe.
Article
Chemistry, Physical
Xiuqing Bai, Huiyu Li, Yonggang Peng, Guofeng Zhang, Changgang Yang, Wenli Guo, Xue Han, Jialu Li, Ruiyun Chen, Chengbing Qin, Jianyong Hu, Gaoling Yang, Haizheng Zhong, Liantuan Xiao, Suotang Jia
Summary: This study investigates the effect of aspect ratios of CdS nanorods on the photoluminescence emission of CdSe/CdS dot-in-rod nanocrystals using single-dot photoluminescence spectroscopy. The results show that as the aspect ratio increases, the photoluminescence quantum yield and lifetime decrease, while photoluminescence blinking is suppressed and the effect on the photoluminescence spectrum is less significant.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Syed Mansoor Ali, S. Aldawood, M. S. AlGarawi, S. S. AlGhamdi, H. Kassim, A. Aziz
Summary: The induced effects of gamma rays on the properties of Bi2S3 thin films synthesized using SILAR have been studied. It was found that the crystallite size and energy band gap decreased with increasing gamma radiation dose, while the optical transmission and emission characteristics of the irradiated films improved.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Xing-Zhou Lu, Chao Gu, Qi Zhang, Lei Shi, Shi-Kui Han, Guan-Ping Jin
Summary: By adjusting the ratio of different surfactants, a colloidal strategy was proposed for the regioselective construction of typical Ag-Co2P NHs. The constructed heterointerface enhances the catalytic activity of the hydrogen evolution reaction, with more exposed active sites and a synergistic effect.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Ying Wang, Jiarong Yao, Shuaishuai Ding, Siyu Guo, Dapeng Cui, Xinyue Wang, Shuyuan Yang, Lijuan Zhang, Xinzi Tian, Di Wu, Chao Jin, Rongjin Li, Wenping Hu
Summary: Research on organic single crystals grown on a liquid substrate and used to construct single-crystalline OSVs revealed high magnetoresistance responses and spin transport properties. A magnetoresistance value as high as 17% was measured with an intermediate layer thickness of 269 nm. Spin transport was observed in single crystals up to a thickness of 457 nm, much larger than that of polycrystalline thin films.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Physical
Rachel M. Morin, Garnett W. Bryant, Elena Shevchenko, Yuchen Sha, Matthew Pelton
Summary: Characterizing the distribution of electron transfer rates from nanorods to molecules through individual measurements on CdSe/CdS core/shell nanorods functionalized with single methyl viologen molecules revealed that charge transfer most likely involves hot electrons in an excited conduction-band state. The ability to extract hot electrons from semiconductor nanocrystals may aid in energy-efficient photocatalysis, and the single-particle charge-transfer method could be a widely applicable tool to explore the spatial distribution of electronic states in nanocrystals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Karam Shreteh, Michael Volokh, Vladimir Ezersky, Taleb Mokari
Summary: The study explores the role of metal oxides in the formation of complex nanostructures, demonstrating that different oxide compositions and structures can be used to control properties. Metal oxides are shown to guide the selective growth of CdS domains and have a significant impact on the final shape of complex nanostructures.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Haiguo Hu, Yonghong Zeng, Shan Gao, Rui Wang, Jinlai Zhao, Kaixi You, Yufeng Song, Quanlan Xiao, Rui Cao, Jianqing Li, Zhitao Lin, Jia Guo, Yiqing Shu, Zhinan Guo, Dianyuan Fan
Summary: A unique and rapid solution method has been proposed for the synthesis of high-quality hexagonal Te nanosheets, which showed excellent optical absorption, good photoresponse, and stability as a photoanode material in a photoelectrochemical photodetector. Additionally, the Te nanosheets demonstrated excellent nonlinear absorption properties and successfully achieved mode-locking operation in a erbium-doped fiber ring laser.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Pengfei Hu, Dong Zhou, Shiqing Xu, Qianru Ma, Jiaqi Yin, Yali Cao, Jing Xu
Summary: This study successfully achieved room-temperature aqueous phase- and size-controlled synthesis of CdS nanocrystals by modulating the pH value and using chelator ethylenediamine for guiding the assembly of nanocrystals.
Article
Materials Science, Multidisciplinary
Arsenii S. Portniagin, Jiajia Ning, Shixun Wang, Zhuo Li, Aleksander A. Sergeev, Stephen Kershaw, Xiaoyan Zhong, Andrey L. Rogach
Summary: This study successfully achieved the synthesis of core/shell CuInS2/CdS dot-in-rod nanoheterostructures with precise control over morphology and strong emission in the near-infrared range. The use of seeded growth approach allowed for tuning the dimension of the resulting core/shell nanorods, while alloying of the CuInS2 cores with Zn improved the photoluminescence quantum yield.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yiming Wang, Nitya Sai Reddy Satyavolu, Hong Yang, Yi Lu
Summary: This study systematically analyzed the evolution of structural and functional parameters in the growth of Au-Ag nanostructures controlled by two DNA sequences. It deconvoluted the contributions of structural parameters in affecting the plasmonic properties and designed new nanostructures by exchanging DNA sequences.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Li-Ping Ding, Yan Tang, Peng Shao, Hui Zhang, Yi-Jin Guo, Jia-Hao Zeng, Ya-Ru Zhao
Summary: The edge structure of 2D materials is crucial for their properties and functionalities. In this study, the edge reconstruction structures of ZnO nanoribbons were investigated using computational tools and theoretical simulations. Stable armchair, O-enriched zigzag, and Zn-enriched zigzag edge structures were identified.
Article
Chemistry, Multidisciplinary
Aniket S. Mule, Sergio Mazzotti, Aurelio A. Rossinelli, Marianne Aellen, P. Tim Prins, Johanna C. van der Bok, Simon F. Solari, Yannik M. Glauser, Priyank Kumar, Andreas Riedinger, David J. Norris
Summary: The study investigates the growth mechanism of semiconductor magic-sized clusters, with a particular focus on CdSe nanocrystals. By synthesizing a series of gradually increasing magic-sized nanocrystals and developing a microscopic model, it reveals the layer-by-layer growth mechanism of zinc-blende crystallites and the source of special stability in these nanocrystals. The analysis also identifies strong similarities with the growth of semiconductor nanoplatelets, and exploits this to further increase the size range of magic-sized nanocrystals.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Alexander Klaiber, Tom Kollek, Simon Cardinal, Nicolas Hug, Markus Drechsler, Sebastian Polarz
ADVANCED MATERIALS INTERFACES
(2018)
Article
Biology
Samuel Monter, Veit-Lorenz Heuthe, Emanuele Panizon, Clemens Bechinger
Summary: Understanding why animals organize in collective states is a central question of current research in biology, physics, and psychology. Hamilton postulated that animal herds form due to individuals' selfish motivation to minimize predation risk. By using Multi Agent Reinforcement Learning (MARL) framework, the study reveals the optimal strategy to solve the selfish herd problem and demonstrates that individuals' motivation to reduce predation risk leads to collective behaviors such as the formation of cohesive swirls.
JOURNAL OF THEORETICAL BIOLOGY
(2023)
Article
Chemistry, Physical
J. Alejandro Rivera-Moran, Yi Liu, Samuel Monter, Chiao-Peng Hsu, Pia Ruckdeschel, Markus Retsch, Maciej Lisicki, Peter R. Lang
Summary: The near-wall Brownian dynamics of different types of colloidal particles were investigated, revealing that rough particles diffuse significantly slower compared to smooth particles. This difference in dynamics is attributed to the rough particles significantly changing their DLVO interaction with the wall, affecting their diffusion.
