Article
Multidisciplinary Sciences
Taewan Kim, Seongmin Park, Sohee Jeong
Summary: A growth model based on monomer diffusion dynamics was proposed to synthesize colloidal InAs QDs with a size over 9.0 nm and a narrow size distribution. By controlling the diffusion dynamics, the authors were able to overcome the size limitation of nanocrystal growth in solution and extend the spectral coverage of InAs QDs beyond 1S(max) of 1600 nm.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Wen Zeng, Shun Yang, Yichao Liu, Tianhang Yang, Zhizhong Tong, Xiaobiao Shan, Hai Fu
Summary: A mathematical model describing the nonlinear relationship between droplet generation in a T-junction microdroplet generator is established, showing that the droplet length varies nonlinearly with the driving-pressure ratio under low capillary numbers. Experimental testing of the droplet length and driving-pressure ratio relationship is done for different T-junction geometries. A closed-loop control droplet microfluidic system is demonstrated to more accurately control droplet size, with the relative standard deviation of droplet size under different flow conditions being less than 2%.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Qi Sun, Jun Liu, Ying Xie, Song Wang, Qun Li, Zipeng Xing, Lihong Qi, Kai Pan, Yujin Chen
Summary: Fabricating oxide nanoparticle/graphene composite is significant for enhancing electromagnetic wave absorption properties. In this study, a monodisperse manganese oxide nanoparticle/reduced graphene oxide composite was successfully obtained through hydrophobic interaction in a colloidal solution. The composite displayed excellent electromagnetic wave absorption in the 2-18 GHz band.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Chemistry, Physical
Ezgi Yildirim, Raj Kumar Ramamoorthy, Rohan Parmar, Pierre Roblin, Jorge A. Vargas, Valeri Petkov, Ana Diaz, Stefano Checchia, Isaac Rodriguez Ruiz, Sebastien Teychene, Lise -Marie Lacroix, Guillaume Viau
Summary: Currently, there is a strong focus on studying ultrasmall metal nanoparticles due to their unique properties. The synthesis of monodisperse nanoparticles of a very small size and well-defined structure requires a good understanding of the crystallization process, which can be achieved by conducting in situ studies. This article describes the synthesis of ultrasmall gold nanoparticles using reduction methods and reveals the competition between nucleation and crystallization processes. By adjusting reaction conditions, such as concentration and temperature, monodisperse gold nanoparticles with icosahedral structure can be obtained.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Parker R. Wray, Mohammad Ali Eslamisaray, Gunnar M. Nelson, Ognjen Ilic, Uwe R. Kortshagen, Harry A. Atwater
Summary: Optically induced magnetic resonances (OMRs) are highly tunable scattering states that cannot be reproduced in systems that only support electric resonances. In this study, we synthesized OMR-based thin films composed of monodisperse crystalline silicon nanoparticles and investigated their absorption and scattering response. The results show that the thin films exhibit near complete blackbody absorption and strongly directional forward scattering, providing angle- and polarization-insensitive antireflection properties across the visible spectrum. A modified effective medium model considering multipole resonances and interparticle coupling is found to agree well with the experimental results.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Julia Nette, Federico Montanarella, Chenglian Zhu, Taras V. V. Sekh, Simon C. C. Boehme, Maryna I. I. Bodnarchuk, Gabriele Raino, Philip D. D. Howes, Maksym V. V. Kovalenko, Andrew J. J. deMello
Summary: The study presents the highly controlled, microfluidic template-assisted self-assembly of CsPbBr3 nanocrystals into spherical supraparticles, achieving precise control over average supraparticle size by varying the nanocrystal concentration and droplet size. This enables the synthesis of highly monodisperse, sub-micron supraparticles (with diameters between 280 and 700 nm).
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Magdalena Kulpa-Greszta, Maciej Wnuk, Anna Tomaszewska, Jagoda Adamczyk-Grochala, Andrzej Dziedzic, Iwona Rzeszutek, Bartosz Zarychta, Dominika Bloniarz, Anna Lewinska, Robert Pazik
Summary: The anisotropy of magnetic nanoparticles has been controlled by modifying their shape, and the efficiency of energy conversion and their effects on normal and cancer cells have been studied. Specific shape nanoparticles induce cell death, while lower concentrations stimulate antioxidative and anti-inflammatory response in normal cells.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Thomas Noblet, Julie Hottechamps, Marie Erard, Laurent Dreesen
Summary: This article highlights the importance of using fluorescent nanocrystals for biosensing, particularly colloidal quantum dots (QDs) which can perform resonant energy transfer (FRET). The study reveals that unlike molecular fluorophores, the emission properties of QDs are highly dependent on their size distribution, leading to energy transfers between QDs when clustered together. A mathematical model is developed to explain the efficiency of this homogeneous resonant energy transfer (homo-FRET) process, which is influenced by the statistical donor-acceptor polarization of the QD population.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Franziska Krieg, Peter C. Sercel, Max Burian, Hordii Andrusiv, Maryna Bodnarchuk, Thilo Stoeferle, Rainer F. Mahrt, Denys Naumenko, Heinz Amenitsch, Gabriele Raino, Maksym Kovalenko
Summary: Ligand-capped nanocrystals of lead halide perovskites, particularly CsPbX3 NCs, exhibit large absorption cross section and efficient photoluminescence, making them attractive for applications in light-emitting devices and quantum optics. Size-selective precipitation of CsPbBr3 NCs coated with a long-chain sulfobetaine ligand yields monodisperse samples with tunable sizes, essential for studying their photophysics and practical applications. Additionally, zwitterion-capped NCs readily form long-range ordered superlattices with larger domain sizes and lower mosaicity, displaying superfluorescence at cryogenic temperatures.
ACS CENTRAL SCIENCE
(2021)
Article
Chemistry, Physical
Andrius Pakalnis, Gediminas Niaura, Rimantas Ramanauskas, Dmitry Karpinsky, Guillaume Rogez, Marc Lenertz, Jerome Robert, Pierre Rabu, Shih-Wen Chen, Thomas Chung-Kuang Yang, Ramunas Skaudz, Aivaras Kareiva
Summary: Novel metastable hexagonal Lu(1-x)ScxFeO3 compounds were prepared and characterized. The phase composition was found to vary with the Sc content, and the reversible polar to nonpolar phase transition temperature decreased with increasing Sc content. The magnetization measurements showed non-zero room temperature magnetization and spin reorientation transitions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Multidisciplinary
Xiaogang Peng, Liulin Lv, Shaojie Liu, Jiongzhao Li, Haixin Lei, Haiyan Qin
Summary: Zinc-blende CdSe, CdS, and CdSe/CdS core/shell nanocrystals with a structure-matched shape (cube-shaped, edge length <= 30 nm) were synthesized via a universal scheme. These nanocrystals demonstrated novel photoluminescence properties, such as near-unity single exciton and biexciton photoluminescence quantum yields, nonblinking photoluminescence of individual nanocrystals, and stable and narrow photoluminescence full width at half maximum at low temperatures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
R. M. Freire, J. L. Palma, S. Michea, R. Ramirez, S. E. Baltazar, J. C. Denardin
Summary: This study investigated the inversion degree (X) of a Co-based spinel nanostructure by synthesizing and characterizing CoFe2O4 NPs, performing first-principles calculations, and comparing hysteresis loops with experimental data. The results suggested that the most probable inversion degree for this nanostructure was X = 0.75.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Review
Chemistry, Multidisciplinary
Yilu Qin, Tianle Guo, Jingjing Liu, Tie Lin, Jianlu Wang, Junhao Chu
Summary: This paper briefly introduces the development of intraband absorption of colloidal quantum dots (CQDs) and investigates the possibility of using CQDs to produce very long wave infrared (VLWIR) detectors. The detectivity of CQDs for VLWIR is calculated and found to be affected by parameters such as quantum dot size, temperature, electron relaxation time, and distance between quantum dots. The theoretical derivation results, combined with the current development status, suggest that the detection of VLWIR by CQDs is still in the theoretical stage.
Article
Nanoscience & Nanotechnology
Guorong Wang, Mengyao Cui, Ying Qiu, Yuqing Miao, Huijun Ma, Huan Zhang, Yifan Zhang, Xiaoli Liu, Jiabao Yi, Mingli Peng, Haiming Fan
Summary: In this study, high-quality IONPs were synthesized through the thermal decomposition of FeCO3 in solution. The particle diameter was tuned between 3 and 20 nm by adjusting the reaction conditions and seed-mediated growth. FeCO3 is a readily available, economical, environment-friendly precursor with high iron content, making it a potential precursor for IONP synthesis.
MICRO & NANO LETTERS
(2021)
Article
Multidisciplinary Sciences
Jae-Hyeok Lee, Yongsub Kim, Sang-Koog Kim
Summary: In this study, we experimentally demonstrated that heat-dissipation power driven by ferromagnetic resonance (FMR) in superparamagnetic nanoparticles can lead to highly localized incrementation of targeted temperatures. The generated power is extremely high and robustly correlated with the intrinsic material parameters. Additionally, we found that the magnetization-dissipation-driven temperature increments can be reliably manipulated by extremely low strengths of applied AC magnetic fields.
SCIENTIFIC REPORTS
(2022)
