Article
Chemistry, Multidisciplinary
Xiaotong Fan, Shuli Wang, Xiao Yang, Chenming Zhong, Guolong Chen, Changzhi Yu, Yihang Chen, Tingzhu Wu, Hao-Chung Kuo, Yue Lin, Zhong Chen
Summary: This study proposes a bicomponent perovskite nanocomposite (BPNC) for color conversion layers in micro-light-emitting-diode (micro-LED) arrays, which significantly enhances the photoluminescence intensity through the built-in Forster resonance energy transfer (FRET) from the core CsPbBr3 to the shell gamma-CsPbI3. The FRET is conducted through a pair of combined quasi-degenerate energy levels in the blue spectra region, resulting in high excitation wavelength selectivity. The BPNC exhibits the brightest single-peak red photoluminescence with near 100% quantum yield and is adaptable to a wide range of emission wavelengths when used as color downconversion layers in a blue micro-LED array.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Takahisa Omata, Hiroshi Asano, Masahiro Sakai, Yoshikazu Terai, Masao Kita
Summary: The research found that the valley splitting of PbSe quantum dots can be significantly enhanced by controlling the thickness of the CdSe shell in varying inter-QD distances. When the inter-QD distance is large, Forster resonance energy transfer causes a redshift in photoluminescence emission.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Meng Liu, Junhui Wang, Guijie Liang, Xiao Luo, Guohui Zhao, Shan He, Lifeng Wang, Wenfei Liang, Juntao Li, Kaifeng Wu
Summary: Research interest in the spin properties of lead halide perovskites has been rising in recent years. However, these systems often have very short spin lifetimes. Nonetheless, these short spin lifetimes can find immediate applications in molecular photochemistry.
Article
Chemistry, Physical
Maximilian Jansen, William A. Tisdale, Vanessa Wood
Summary: Colloidal nanocrystals are used as building blocks to create hierarchical solids with various structures, and recent studies have shown that these structures exhibit collective vibrations. This Perspective discusses the potential applications of these collective vibrations in phononic crystals, acoustic metamaterials, and optomechanical systems.
Article
Chemistry, Physical
Zhaohan Li, Zachary L. Robinson, Paolo Elvati, Angela Violi, Uwe R. Kortshagen
Summary: Understanding and controlling energy transfer between silicon nanocrystals is crucial for designing efficient optoelectronic devices. This study systematically investigates the distance-dependent resonance energy transfer in alkyl-terminated silicon nanocrystals. The results reveal that the energy transfer rates decay faster than predicted by the Forster mechanism, suggesting higher-order multipole interactions.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Melody L. Kessler, Jennica E. Kelm, Hannah E. Starr, Emma N. Cook, Joshua D. Miller, Nelson A. Rivera, Heileen Hsu-Kim, Jillian L. Dempsey
Summary: This study reports three separate ligand-based reaction mechanisms between oleate-capped PbS nanocrystals and undec-10-ene-1-thiol (UDT), and reveals how these three pathways are intertwined. Experimental evidence shows different reaction pathways occur depending on the quantity of UDT added, including Z-type displacement, L-type binding, and X-type exchange mechanisms.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mariarosa Cavallo, Rodolphe Alchaar, Erwan Bossavit, Huichen Zhang, Tung Huu Dang, Adrien Khalili, Yoann Prado, Mathieu G. Silly, James K. Utterback, Sandrine Ithurria, Pavel Dudin, Jose Avila, Debora Pierucci, Emmanuel Lhuillier
Summary: As nanocrystal-based devices mature, understanding their electronic structure becomes crucial. Most spectroscopic techniques overlook the effects of the device's environment, electric field, and illumination. Thus, it is essential to develop tools for in situ and operando device analysis. In this study, photoemission microscopy is used to examine the energy landscape of a HgTe nanocrystal-based photodiode. The method allows for quantification of the diode's built-in voltage and provides insights into the effects of particle size and illumination. The combination of SnO2 and Ag2Te is identified as a more suitable choice for extended-short-wave infrared materials.
Article
Chemistry, Multidisciplinary
Wenqiang Yang, Seung-Hyeon Jo, Yipeng Tang, Jumi Park, Su Geun Ji, Seong Ho Cho, Yongseok Hong, Dong-Hyeok Kim, Jinwoo Park, Eojin Yoon, Huanyu Zhou, Seung-Je Woo, Hyeran Kim, Hyung Joong Yun, Yun Seog Lee, Jin Young Kim, Bin Hu, Tae-Woo Lee
Summary: A re-assembling process is developed to increase J(sc) and PCE in perovskite nanocrystalline (PeNC) solar cells by eliminating long-chain ligands and increasing crystallite size in PeNC films. This work provides a new approach for the preparation of PeNC films and paves the way for high-performance PeNC optoelectronic devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Danielle M. Cadena, Jakub K. Sowa, Daniel E. Cotton, Christopher D. Wight, Cole L. Hoffman, Holden R. Wagner, Jessica T. Boette, Emily K. Raulerson, Brent L. Iverson, Peter J. Rossky, Sean T. Roberts
Summary: Semiconductor nanocrystals interfaced with molecular ligands have potential applications in light-harvesting, photonupconverting, and photocatalytic materials. We demonstrated that ligand aggregation can alter the rate of electron transfer between nanocrystals and organic acceptor ligands, which should be considered for designing hybrid systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
R. Sanchez-Alarcon, J. Noguera-Gomez, V. S. Chirvony, H. Pashaei Adl, Pablo P. Boix, G. Alarcon-Flores, J. P. Martinez-Pastor, R. Abargues
Summary: CsPbI3 perovskite nanocrystals suffer from phase stability issues, which can be overcome by synthesizing mixed halide CsPbBr3-xIx NCs. Spray coating for solid-state anion exchange in CsPbBr3 NCs thin films is a novel technology to manufacture high optical quality and high PLQY CsPbBr3-xIx NC thin films.
Article
Chemistry, Multidisciplinary
Yi Ji, Quan Zuo, Chuanshuang Chen, Yannan Liu, Yiyong Mai, Yongfeng Zhou
Summary: In this study, a multi-to-one supramolecular photocatalyst was developed by assembling multiple graphene quantum dot antennas onto a single-Pt-site porphyrin unimolecular micelle catalytic center. This photocatalyst showed high efficiency in catalyzing water splitting into hydrogen using visible light.
CHEMICAL COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Jisu Ryu, Samuel D. Park, Dmitry Baranov, Iva Rreza, Jonathan S. Owen, David M. Jonas
Summary: Femtosecond two-dimensional (2D) spectroscopy is used to separate size dispersion broadening in quantum-confined nanomaterials, allowing determination of thermodynamic differences and maximum photovoltage. The study shows how single-molecule generalized Einstein relations can be applied to average single-molecule linewidth and determine key parameters between absorption and emission spectra.
Article
Chemistry, Multidisciplinary
Chujie Wang, Sri K. Matta, Chun Kiu Ng, Chang Cao, Manoj Sharma, Anthony S. R. Chesman, Salvy P. Russo, Jacek J. Jasieniak
Summary: In this article, a facile direct synthesis method of CsPbX3 perovskite nanocrystal assemblies is reported. These assemblies possess narrow and red-shifted photoluminescence, expanding the color gamut of inorganic perovskites.
Review
Chemistry, Multidisciplinary
Zeger Hens
Summary: In this paper, the binding and packing of organic ligands on the surfaces of colloidal nanocrystals (NCs) are discussed, as they play a crucial role in the formation of NCs with desired properties. Due to the lack of a unique structure in NCs, a single analytical technique cannot provide a complete description of NC surface chemistry. However, solution H-1 nuclear magnetic resonance spectroscopy is highlighted as a unique method to study the ligand shell by distinguishing between surface bound species and surface inactive residues.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Physical
Keaton Prather, Jonathan T. Stoffel, Emily Y. Tsui
Summary: This perspective discusses how reduction, oxidation, and electrostatics on the surface of colloidal semiconductor nano-crystals (NCs) contribute to their electronic properties, including photoluminescence quenching or brightening and shifts in band edge potentials. It highlights recent efforts in combining spectroscopic, electrochemical, and computational methods to characterize redox-active surface sites and trap states and explores future opportunities in this field.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Thijs J. H. Vlugt
Summary: In this manuscript, a method is presented to compute the partial molar properties of fluid mixtures from single Molecular Dynamics simulations. The method uses post-processing techniques involving least squares linear regression and the Small System Method. The results show that the method is applicable to systems with any number of components and any type of intermolecular interactions.
MOLECULAR SIMULATION
(2023)
Review
Urology & Nephrology
Jordi Ochando, Willem J. M. Mulder, Joren C. Madsen, Mihai G. Netea, Raphael Duivenvoorden
Summary: Trained immunity is a functional state of the innate immune response characterized by long-term epigenetic reprogramming. It enhances immune responses against microbial pathogens and has implications in inflammation and transplantation.
NATURE REVIEWS NEPHROLOGY
(2023)
Article
Thermodynamics
H. Mert Polat, Frederick de Meyer, Celine Houriez, Christophe Coquelet, Othonas A. Moultos, Thijs J. H. Vlugt
Summary: In this study, we investigated the effect of temperature and monoethanolamine (MEA) concentration on the self-diffusivity of acid gases, CO2 and H2S, in aqueous MEA solutions. The results showed that the self-diffusivity of both acid gases depends significantly on the temperature and MEA concentration in the solution. This study is important for the development of more efficient acid gas treatment processes.
FLUID PHASE EQUILIBRIA
(2023)
Article
Thermodynamics
W. A. van Rooijen, P. Habibi, K. Xu, P. Dey, T. J. H. Vlugt, H. Hajibeygi, O. A. Moultos
Summary: In this study, molecular dynamics and continuous fractional component Monte Carlo simulations were conducted to fill in the gaps in thermodynamic and transport property data for hydrogen technologies. New data sets were obtained for interfacial tensions, self-diffusivities, and solubilities of hydrogen in aqueous sodium chloride solutions. The simulation results showed excellent agreement with available experimental data, with average deviations lower than 10%.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Thermodynamics
Vyomesh M. Parsana, Sachin Parikh, Keval Ziniya, Hirvita Dave, Piyush Gadhiya, Kedar Joshi, Dolly Gandhi, Thijs J. H. Vlugt, Mahinder Ramdin
Summary: Vapor-liquid equilibrium data were measured for two binary systems THF + AA and THF + TCE using an ebulliometer under isobaric conditions. The boiling temperatures were reported for different compositions and pressures. The NRTL and UNIQUAC models were used to fit the data, with NRTL model found to be slightly better. These results are important for designing liquid-liquid extraction and distillation processes involving THF, AA, and TCE mixtures.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Materials Science, Multidisciplinary
Arnoldus J. J. van Bunningen, Atul D. D. Sontakke, Ruben van der Vliet, Vincent G. G. Spit, Andries Meijerink
Summary: Narrower band red and green emission in phosphor-converted white light-emitting diodes can be achieved by using Mn2+ as a luminescent ion. The luminescence quenching temperature of Mn2+ is shown to vary greatly depending on the host material, with a positive correlation with the bandgap of the host. The quenching mechanism is found to be thermally activated photoionization, and a wide-bandgap host material is required for temperature-stable Mn2+ luminescence in high power LEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Biomedical
Max L. L. Senders, Claudia Calcagno, Ahmed Tawakol, Matthias Nahrendorf, Willem J. M. Mulder, Zahi A. A. Fayad
Summary: Myocardial infarction, stroke, mental disorders, neurodegenerative processes, autoimmune diseases, cancer and HIV impact the haematopoietic system and may worsen pre-existing atherosclerosis. Whole-body PET/MRI imaging has been used to study the interplay between the haematopoietic system and atherosclerosis. In this Perspective, the applicability of integrated PET/MRI for studying immune-mediated phenomena associated with haematopoietic activity and cardiovascular disease is reviewed.
NATURE BIOMEDICAL ENGINEERING
(2023)
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
Physics, Applied
Aleksandar Ciric, Thomas van Swieten, Jovana Perisa, Andries Meijerink, Miroslav D. D. Dramicanin
Summary: Luminescence thermometry is a versatile remote temperature sensing technique. This study introduces a novel measurement technique, LIR2, which combines the temperature sensitivity of ground- and excited-state populations. By using Y3Al5O12:Er3+,Yb3+ nanoparticles, the LIR2 method shows significant increase in sensitivity and measurement precision comparing to the conventional LIR method.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jintao Kong, Andries Meijerink
Summary: Based on simple optical spectroscopy, this study identifies the reversible charge transfer mechanism in the benchmark persistent phosphors CaAl2O4:Eu2+,Nd3+. The forward charge transfer from Eu2+ to Nd3+ and the backward charge transfer from Nd2+ to Eu3+ are confirmed. The percentages of Eu2+ and Nd3+ involved in the charge transfer exceed previous estimates in other persistent phosphors, and this strategy also offers additional advantages of site selectivity in identifying different contributions of Nd3+ sites. These findings highlight the importance of reversible charge transfer in persistent phosphors and contribute to a better understanding of the persistent luminescence mechanism.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jur W. de Wit, Thomas P. van Swieten, Marie Anne van de Haar, Andries Meijerink, Freddy T. Rabouw
Summary: Mn4+-doped fluorides are commonly used phosphors for warm-white lighting by converting blue light from LEDs into red light. However, they suffer from droop, i.e., decreasing performance at higher power, which limits their application in high-power scenarios. This study provides a comprehensive explanation of droop in Mn4+-doped K2TiF6 by considering all previously proposed mechanisms. By combining experimental and modeling approaches, the contributions of absorption bleach, thermal quenching, and Auger quenching at different excitation densities are quantified. This work contributes to a better understanding of the limitations of these materials and may inspire strategies to enhance their efficiency in high-power applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Freia Ruegenberg, Amador Garcia-Fuente, Markus Seibald, Dominik Baumann, Gregor Hoerder, Tim Fiedler, Werner Urland, Hubert Huppertz, Andries Meijerink, Markus Suta
Summary: Red-emitting narrow-band phosphors are crucial for the next generation of high-efficiency and optimized correlated color temperature white-light phosphor-converted light-emitting diodes. The crystalline structure of SALON:Eu2+ has been studied using X-ray diffraction, low-temperature luminescence spectroscopy, and ligand field theory to understand the local coordination symmetry and ligand ratio. The mutual energy transfer between Eu2+ centers in SALON:Eu2+ has been characterized using time-resolved luminescence.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Energy & Fuels
Bin Fang, Othonas A. Moultos, Tao Lu, Jiaxin Sun, Zhichao Liu, Fulong Ning, Thijs J. H. Vlugt
Summary: Hydrate dissociation is often accompanied by the formation of nanobubbles. Knowledge of the effects of nanobubbles on hydrate dissociation is essential for understanding the dynamic behavior of the hydrate phase change and improving the gas production efficiency.
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
Materials Science, Multidisciplinary
Arnoldus J. J. van Bunningen, Simon Tobias Keizer, Andries Meijerink
Summary: Broad band NIR emission has been observed in concentrated Mn2+ phosphors, which is attributed to the presence of NIR emitting trap centers, possibly Mn3+. Exchange coupling between Mn2+ neighbors cannot explain the observed redshifts, as the magnitude is much larger than expected. Temperature and concentration dependent studies show that energy migration over the Mn2+ sublattice plays a key role in the NIR emission.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
