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Extracting biological information from awake and unrestrained mice is imperative to basic and pre-clinical research. Accordingly, imaging methods which preclude invasiveness, anesthesia, and/or physical restraint enable more physiologically relevant biological data extraction by eliminating these extrinsic confounders. In this article, we discuss the recent development of shortwave infrared (SWIR) fluorescent imaging to visualize peripheral organs in freely-behaving mice, as well as propose potential applications of this imaging modality in the neurosciences.
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http://dx.doi.org/10.3389/fnins.2023.1135494 | DOI Listing |
Chem Sci
August 2025
College of Materials Science and Engineering, College of Science, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University Nanjing 210037 China
J-Aggregates hold significant promise for high-resolution shortwave infrared (SWIR) imaging, yet achieving robust SWIR absorption and emission simultaneously has been hindered by hypsochromic shifts in absorption and emission quenching caused by undesirable H- and random aggregation. To address this, we developed highly fluorescent BODIPY J-aggregates exhibiting absorption and emission spanning 1000-1600 nm. A key innovation was the implementation of a zig-zag molecular design, which effectively suppressed H-aggregation and minimized intermolecular interactions, thereby enabling anti-quenching SWIR emission.
View Article and Find Full Text PDFNanotechnology
September 2025
Department of Electrical and Computer Engineering, New Jersey Institute of Technology, University Heights, Newark, New Jersey, 07102, UNITED STATES.
Uncooled mid-wave infrared (MWIR) image sensors, which are compact, lightweight, and energy-efficient, are expected to take a dominant position in the future infrared market. As an alternative to traditional epitaxially-grown infrared semiconductors used in high-performance cryo-cooled MWIR imagers, the concept of hybrid sensor materials is gaining attention. Specifically, hybrid structures combining two-dimensional (2D) materials, known for their superior carrier transport properties, with colloidal quantum dots (QDs), which offer excellent optical properties, have shown record-high room-temperature infrared responsivities with spectral responses extending to short-wave infrared (SWIR).
View Article and Find Full Text PDFACS Nano
September 2025
IMEC, Kapeldreef 75, 3001 Leuven, Belgium.
Heavy-metal-free III-V semiconductor-based colloidal quantum dots (CQDs), such as InAs, are promising candidates for near- and short-wave infrared detection. However, up-to-date research efforts remain mainly limited to wavelengths below 1100 nm due to challenges in synthesis, junction formation, and passivation for large diameter InAs quantum dots. Systematic investigations into device design, reverse dark current mechanisms, and trap distributions in larger InAs quantum dots remain limited.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
State Key Laboratory of Chemical Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China.
Shortwave infrared (SWIR) light-driven photoinduced electron/energy transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization holds great promise for applications such as 3D printing and transdermal photopolymerization. However, efficient SWIR-active photocatalysts remain lacking. Herein, we report the use of lead-free CuInSe/CuInS core/shell quantum dots (QDs), with their absorption onset extending to 1100 nm, to drive efficient SWIR PET-RAFT polymerization.
View Article and Find Full Text PDFSci Rep
September 2025
Faculty of Physics, University of Tabriz, Tabriz, 51665-163, Iran.
Recent advances in nanostructured photodetectors have enabled precise control over light absorption while minimizing photon losses. In this work, we demonstrate a plasmonic metamaterial absorber based on two-dimensional MXene (Ti₃C₂Tₓ) featuring geometrically tunable tetragram-shaped arrays. Through finite-difference time-domain (FDTD) simulations and structural optimization, we achieved over 90% photon absorption across the broadband spectral range of 1000-2500 nm, representing a significant enhancement in operational bandwidth.
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