Article
Biochemical Research Methods
Yao-Wen Wu
Summary: New red-green optogenetic dimerizers allow precise control of gene expression activation and deactivation with high spatiotemporal resolution.
Article
Chemistry, Organic
Yi-Xiong Hu, Pei-Pei Jia, Chang-Wei Zhang, Xing-Dong Xu, Yanfei Niu, Xiaoli Zhao, Qian Xu, Lin Xu, Hai-Bo Yang
Summary: A dual-donor artificial light-harvesting system was efficiently constructed through hierarchical self-assembly approaches involving metal-ligand coordination interactions, host-guest interactions, and hydrophobic interactions, demonstrating higher energy transfer efficiency and antenna effects compared to a model single-donor artificial LHS. This research provides an efficient strategy for constructing artificial LHSs with high energy transfer efficiency and antenna effects.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Enrico Bergamaschi, Danijela Lunic, Liam A. McLean, Melissa Hohenadel, Yi-Kai Chen, Christopher J. Teskey
Summary: This study demonstrates, for the first time, the ability to use light to distinguish between ketones and carboxylic acids in more complex molecules. By utilizing different activation modes, a single catalytic system can be used for hydroboration, with chemoselectivity dictated solely by the presence or absence of visible light.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Patricia Mueller, Marlen Sahlbach, Simone Gasper, Guenter Mayer, Jens Mueller, Bernd Poetzsch, Alexander Heckel
Summary: The research team successfully controlled blood clotting and reversed anticoagulation by modifying a thrombin-binding aptamer with a red-light photocleavable linker derived from Cy7 using Cu-catalyzed Click chemistry. They demonstrated that the modified aptamer could be deactivated with red light (660 nm) in human blood, restoring the blood's natural coagulation capability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Editorial Material
Chemistry, Multidisciplinary
Andrey Shatskiy, Jian-Quan Liu, Markus D. Karkas
Summary: The authors present an innovative approach for amidation of aldehydes via N-centered radical intermediates without the need for a photocatalyst.
Editorial Material
Genetics & Heredity
Henry Ertl
Summary: The study presents a new optogenetic method for controlling gene expression in organoids that can be combined with single-cell and spatial transcriptomics.
NATURE REVIEWS GENETICS
(2023)
Article
Chemistry, Multidisciplinary
Valentin Jean Perillat, Erica Del Grosso, Cesare Berton, Francesco Ricci, Cristian Pezzato
Summary: This study demonstrates that DNA nanodevices can be controlled using visible light in a reversible and highly programmable manner in photo-switchable aqueous buffer solutions. The presented strategy is non-invasive and enables remote control of complex operations of DNA-based nanodevices, such as reversible release/loading of cargo molecules.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hongguang Li, Jingcheng Hao, Geping Zhang, Longyue Yu, Jingfei Chen, Renhao Dong, Nicolas Godbert
Summary: Artificial light-harvesting systems (ALHSs) are an attractive scientific topic, and a new type of binary ALHS using an ionic naphthalimide (NPI) derivative as a donor has been reported, which shows efficient energy transfer and tunable color by adjusting the acceptor/donor ratio.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Multidisciplinary
Olesia Dmytruk, Marco Schiro
Summary: The authors theoretically investigate the interplay between topological phases of matter and quantum light, finding that quantum light can affect the topological properties of the system. They also compute the polariton spectrum of the coupled system to probe the phase transition.
COMMUNICATIONS PHYSICS
(2022)
Article
Optics
Xiaolu Hu, Quanlong Yang, Lingli Ba, Junliang Yang
Summary: Near-perfect light harvesting can be achieved with a metasurface-based absorber, which has numerous potential applications in sensing, cloaking, and photovoltaics. In this study, a reconfigurable perfect absorber based on a MoTe2 hybrid metasurface at terahertz frequency is presented. The optical response of the metasurface-based absorber shows a reconfigurable switching from dual-frequency perfect absorption to a new single-frequency absorption when illuminated by light. The absorption mechanism of the hybrid metasurface is well demonstrated with the analytical coupled-dipole model and impedance analysis. The proposed reconfigurable THz meta-absorber provides a new route for active radar stealth, frequency-selective detection, and next-generation wireless communication.
Article
Optics
Jing-Wen Wu, Rong Cong, Su Xu, Yue-Feng Liu
Summary: The potential of using metallic structures with photonic singularities for harvesting light has been demonstrated in nanophotonics, sensing, and bio-medical applications. A new method for achieving massive photonic singularities for spatially modulated light harvesting is proposed. The method allows for localized light confinement at spatially distributed singularities.
Article
Chemistry, Multidisciplinary
Martin Reynders, Apirat Chaikuad, Benedict-Tilman Berger, Katharina Bauer, Pierre Koch, Stefan Laufer, Stefan Knapp, Dirk Trauner
Summary: Covalent kinase inhibitors have shown success in recent clinical trials, with a strategy to control the reactivity of electrophiles using light to increase tissue selectivity. Researchers have developed covalent inhibitors for the kinase JNK3, which become effective inhibitors after exposure to light, supported by X-ray structures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Ceramics
M. L. Puga, J. Venturini, W. C. Guaglianoni, T. L. Ruwer, T. B. Wermuth, C. P. Bergmann
Summary: This study successfully synthesized aluminum-doped TiO2 nanotubes via a single-step anodization method, achieving microstructural control by changing the anodization potential and effectively inserting aluminum into the anatase lattice to enhance optical absorption and photoelectrochemical performance.
CERAMICS INTERNATIONAL
(2021)
Article
Automation & Control Systems
Ge Shi, Jian Chang, Yinshui Xia, Xiudeng Wang, Huakang Xia, Qing Li
Summary: This article presents a multisource collaborative energy extraction circuit (MSC-EC) that can extract energy from vibration, ambient light, and thermal energy simultaneously. It utilizes maximum power point tracking (MPPT) and a single inductor to extract energy from piezoelectric transducer (PZT) and photovoltaic (PV) cell. The circuit can also collaborate with a thermoelectric generator (TEG) to improve the efficiency of thermal energy extraction. Experimental results show an MPPT efficiency of about 83% for the PV cell and a maximum energy extraction efficiency of about 74% for the TEG. The MSC-EC achieves a maximum output power of 4.2 mW under certain conditions.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Siyuan Yang, Mingji Huang, Yongfeng Zhao, H. P. Zhang
Summary: By studying how light polarization affects the motion of photoresponsive algae Euglena gracilis, it was found that cells exhibit different motion patterns under different light polarization conditions. Experimental results demonstrate that ordered cell swimming can generate directed transporting fluid flow.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
Luke C. Ugwuoke, Tomas Mancal, Tjaart P. J. Kruger
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Optics
Cosmas Mafusire, Tjaart P. J. Kruger
JOURNAL OF MODERN OPTICS
(2020)
Article
Biochemistry & Molecular Biology
Md Wahadoszamena, Tjaart P. J. Kruger, Anjue Mane Ara, Rienk van Grondelle, Michal Gwizdala
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2020)
Article
Microbiology
Michal Gwizdala, Pedro H. Lebre, Gillian Maggs-Kolling, Eugene Marais, Don A. Cowan, Tjaart P. J. Kruger
Summary: In hyper-arid soil environments, photosynthetic microorganisms are mostly found in sub-lithic habitats, such as the ventral surfaces of translucent pebbles in desert pavements. This study found that quartz pebbles reduce light transmission and filter out short wavelength spectrum, but the hypolithic cyanobacterial communities show some adaptation to sub-lithic conditions. Under water-saturated conditions, there is no evidence of light stress on hypolithic communities even when exposed to full midday sunlight.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Review
Physics, Multidisciplinary
Emil Roduner, Tjaart P. J. Kruger
Summary: The understanding of the origin of irreversibility in thermodynamics has been a long-standing challenge, with energy dissipation identified as a key factor. The distinction between thermodynamic irreversibility and time-irreversibility has been highlighted, with processes such as thermalization and equilibration playing a role in memory loss and energy dissipation within systems. The Second Law of thermodynamics, which states that spontaneous processes lead to increasing entropy, remains a fundamental principle.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Justine Sageka Nyarige, Alexander T. Paradzah, Tjaart P. J. Kruger, Mmantsae Diale
Summary: Zinc-doped, silver-doped, and zinc/silver codoped hematite nanostructures were synthesized and used as photoanodes for watersplitting. The codoped sample showed the highest photocurrent density and free carrier density, as well as low impedance. The nanostructures exhibited uniformly distributed grains and absorption in the visible region.
Article
Chemistry, Physical
Bertus van Heerden, Tjaart P. J. Kruger
Summary: Real-time feedback-driven single-particle tracking is a technique that allows for single-molecule spectroscopy of freely diffusing particles. This study compared the performance of different methods using statistical calculations and dynamical simulations. The results showed a trade-off between precision and speed, with iSCAT providing better tracking for most samples. The study highlights the importance of selecting the appropriate method and can be extended to other techniques.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
J. A. Nothling, Tomas Mancal, T. P. J. Kruger
Summary: The accuracy of approximate methods for calculating linear optical spectra is studied. The Full Cumulant Expansion (FCE) method is found to be the most accurate for all spectra calculations. The coherent time-dependent Redfield (ctR) method performs well for moderately coupled pigments but may differ significantly from exact spectra when strong interpigment coupling is present. The Redfield and modified Redfield methods generally perform worse than ctR, especially for strong interpigment coupling or small excitonic energy gap. The accuracy of approximate spectra is not affected by resonance with intramolecular modes for typical system-bath coupling and disorder values found in plant light-harvesting complexes.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Bertus van Heerden, Nicholas A. Vickers, Tjaart P. J. Kruger, Sean B. Andersson
Summary: This review article explores the applications and key components of real-time feedback-driven single-particle tracking (RT-FD-SPT) techniques, including feedback tracking and control, particle location estimation, and method calibration and characterization. It introduces a collection of metrics to guide experimentalists in selecting suitable methods and identifies opportunities for further development.
Article
Chemistry, Physical
Eninges Asmare, Fekadu Gashaw Hone, Wendimagegn Mammo, Tjaart P. J. Kruger, Newayemedhin A. Tegegne
Summary: In this study, three methods were used to determine the type of aggregates in a benzodithiophene-isoindigo-based copolymer. The results indicate the presence of both H-type and J-type aggregates, with H-aggregates being more dominant.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Plant Sciences
Ahmad Farhan Bhatti, Diana Kirilovsky, Herbert van Amerongen, Emilie Wientjes
Summary: The study using FLIM technology in Synechococcus elongatus cells revealed that state transitions occur homogeneously throughout the cell, with PSI enriched in the inner thylakoid, and heterogeneous distribution of PSII quenching and PBS.
Article
Biochemistry & Molecular Biology
Jiao Zhan, Claudia Steglich, Ingeborg Scholz, Wolfgang R. Hess, Diana Kirilovsky
Summary: This study describes a posttranscriptional regulatory mechanism in cyanobacteria, revealing an important genetic mechanism in photosynthesis.
Meeting Abstract
Biophysics
Bertus van Heerden, Tjaart Kruger
BIOPHYSICAL JOURNAL
(2021)
Meeting Abstract
Biophysics
Tjaart P. Kruger
BIOPHYSICAL JOURNAL
(2021)