Article
Chemistry, Physical
Tom Galle, Daniel Spittel, Nelli Weiss, Volodymyr Shamraienko, Helena Decker, Maximilian Georgi, Rene Huebner, Nadia Metzkow, Christine Steinbach, Dana Schwarz, Vladimir Lesnyak, Alexander Eychmueller
Summary: The research transforms CdSe NPLs into PbSe NPLs suitable for optoelectronic applications through cation exchange, ligand exchange, and electronic coupling, successfully fabricating a photodetector with fast light response at low operational voltages on a commercial substrate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Plant Sciences
Yueping Li, Chi Xu, Haiqing Wang, Xiaobing Liu, Li Jiang, Shengnan Liang, Ziyin Wu, Zhenzhong Wang, Jun Zhou, Wei Xiao, Zihu Guo, Yonghua Wang
Summary: This study used a systems pharmacology approach to decipher the multi-level synergetic mechanism of Ginkgo biloba L. leaves (GBLs) on the treatment of cardiomyopathy, demonstrating its therapeutic potential and providing a paradigm for unraveling the complicated mechanism of action of traditional Chinese medicines.
JOURNAL OF ETHNOPHARMACOLOGY
(2021)
Article
Chemistry, Medicinal
Gloria A. Suarez-Ortiz, Rodrigo Hernandez-Correa, Melissa D. Morales-Moreno, Ruben A. Toscano, Maria Teresa Ramirez-Apan, Armando Hernandez-Garcia, Manuel Amezquita-Valencia, Daniela Araiza-Olivera
Summary: A series of new chiral rhenium complexes were synthesized and fully characterized. The experiments revealed that the chirality of both the metal and ligand significantly influenced the cytotoxicity.
JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Michele Failla, Fransisco Garcia Florez, Bastiaan B. V. Salzmann, Daniel Vanmaekelbergh, Henk T. C. Stoof, Laurens D. A. Siebbeles
Summary: In this study, the initial nature and relaxation of photoexcited electronic states in CdSe nanoplatelets were investigated using ultrafast transient optical absorption measurements and theoretical analysis. It was found that the initial quantum yields of excitons and charge carriers vary with photon energy, and thermal relaxation occurs within 1 ps. No signatures of biexcitons or larger complexes were observed up to the highest average number of absorbed photons per NPL in the experiments.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Federico Montanarella, Quinten A. Akkerman, Dennis Bonatz, Maaike M. van der Sluijs, Johanna C. van der Bok, P. Tim Prins, Marcel Aebli, Alf Mews, Daniel Vanmaekelbergh, Maksym Kovalenko
Summary: Researchers have used in situ synchrotron-based small-angle X-ray scattering and optical absorption spectroscopy to gain new insights into the nucleation, growth, and self-assembly of lead halide perovskite nanocrystals. They found that dispersed 3 nm Cs[PbBr3] agglomerates are the key intermediate species, which slowly nucleate into crystals and release Cs[PbBr3] monomers for further growth. They also discovered the mechanism of spontaneous superlattice formation when the nanocrystals reach a critical size of 11.6 nm.
Article
Chemistry, Multidisciplinary
Ben P. Carwithen, Thomas R. Hopper, Ziyuan Ge, Navendu Mondal, Tong Wang, Rozana Mazlumian, Xijia Zheng, Franziska Krieg, Federico Montanarella, Georgian Nedelcu, Martin Kroll, Miguel Albaladejo Siguan, Jarvist M. Frost, Karl Leo, Yana Vaynzof, Maryna I. Bodnarchuk, Maksym V. Kovalenko, Artem A. Bakulin
Summary: In this study, the relaxation of hot carriers in lead halide perovskites (LHPs) and the role of quantum confinement in nanosystems were examined. Ultrafast pump-push-probe spectroscopy was used to study carrier cooling in different size-controlled LHP nanomaterials. The results showed that dimensional confinement has a significant impact on carrier-phonon and carrier-carrier interactions, highlighting its potential for engineering LHP optoelectronic materials.
Article
Chemistry, Multidisciplinary
P. Tim Prins, Johanna C. van Der Bok, Thomas P. van Swieten, Stijn O. M. Hinterding, Andy J. Smith, Andrei V. Petukhov, Andries Meijerink, Freddy T. Rabouw
Summary: The synthesis of beta-NaYF4 nanocrystals from alpha-NaYF4 precursor particles was investigated using in situ small-angle and wide-angle X-ray scattering and ex situ electron microscopy. It was observed that the particle size distribution evolved from unimodal to bimodal, and eventually back to unimodal, with the final distribution being narrower than the initial distribution. The splitting of the size distribution was attributed to variations in the reactivity of the precursor particles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Maaike M. van der Sluijs, Bastiaan B. V. Salzmann, Daniel Arenas Esteban, Chen Li, Daen Jannis, Laura C. Brafine, Tim D. Laning, Joost W. C. Reinders, Natalie S. A. Hijmans, Jesper R. Moes, Johan Verbeeck, Sara Bals, Daniel Vanmaekelbergh
Summary: Colloidal 2D semiconductor nanocrystals, analogous to solid-state quantum wells, have generated significant interest in the fields of material science and physics. They can be synthesized in large quantities and exhibit spectrally pure absorption and emission. While CdSe nanoplatelets with precise atomic thickness and controllable emission have been almost perfected for the visible region, PbS nanosheets still present challenges due to low photoluminescence quantum yield and unanswered questions about their crystallinity, atomic structure, rectangular shape, and formation mechanism.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Daniel Amgar, Gur Lubin, Gaoling Yang, Freddy T. T. Rabouw, Dan Oron
Summary: Semiconductor nanocrystal emission polarization is a crucial factor for nanocrystal-based technologies. A direct characterization method of the doubly excited-state relaxation transition dipole is proposed using heralded defocused imaging. The results reveal different transition dipole moments for different types of nanorods.
Article
Nanoscience & Nanotechnology
Mark J. J. Mangnus, Jur W. de Wit, Sander J. W. Vonk, Jaco J. Geuchies, Wiebke Albrecht, Sara Bals, Arjan J. Houtepen, Freddy T. Rabouw
Summary: Quantum dots (QDs) have emerged as bright and color-tunable light sources for various applications. Multiparticle spectroscopy (MPS) is demonstrated as a high-throughput method to acquire statistically relevant information about the emissions of QDs. CdSe-based QDs show narrower line widths, less spectral diffusion, and less inhomogeneous broadening compared to InP-based QDs. The experiments pave the way for large-scale characterization of single-QD emission properties and the rational design of future QD structures.
Review
Chemistry, Physical
Joanna Dehnel, Adi Harchol, Yahel Barak, Itay Meir, Faris Horani, Arthur Shapiro, Rotem Strassberg, Celso de Mello Donega, Hilmi Volkan Demir, Daniel R. Gamelin, Kusha Sharma, Efrat Lifshitz
Summary: Incorporating magnetic ions into semiconductor nanocrystals is a promising research field for manipulating spin-related properties. Various host materials and magnetic ions have been studied, and the impact of nanostructure engineering and ion selection in carrier-magnetic ion interactions is emphasized. The use of optically detected magnetic resonance spectroscopy provides valuable insights into the spin dynamics and physical parameters of the carrier-magnetic ion interactions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Michele Failla, Fransisco Garcia Florez, Bastiaan B. V. Salzmann, Daniel Vanmaekelbergh, Henk T. C. Stoof, Laurens D. A. Siebbeles
Summary: We studied the initial nature and relaxation of photoexcited electronic states in CdSe nanoplatelets (NPLs) using ultrafast transient optical absorption measurements and theoretical analysis. The quantum yields of heavy-hole (HH) excitons, light-hole (LH) excitons, and charge carriers vary strongly with photon energy, while thermal relaxation occurs within 1 ps. We observed no signs of biexcitons or larger complexes, except when a probe-generated exciton interacted with a previously produced exciton.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ben P. Carwithen, Thomas R. Hopper, Ziyuan Ge, Navendu Mondal, Tong Wang, Rozana Mazlumian, Xijia Zheng, Franziska Krieg, Federico Montanarella, Georgian Nedelcu, Martin Kroll, Miguel Albaladejo Siguan, Jarvist M. Frost, Karl Leo, Yana Vaynzof, Maryna I. Bodnarchuk, Maksym V. Kovalenko, Artem A. Bakulin
Summary: This study investigates the carrier cooling process in size-controlled lead halide perovskite nanomaterials using ultrafast pump-push-probe spectroscopy. The results show that there is only a weak size effect on the cooling dynamics in cuboidal nanocrystals, while the hot phonon bottleneck effect commonly observed in bulk perovskites is suppressed in two-dimensional systems.