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1. B‐N Fused Anthracene as Functional Linker for π‐Extended Viologens: Near‐IR Emission and Electrochromism

   https://doi.org/10.1002/anie.202521634  

   Nandi, Rajendra Prasad; Zuo, Jingyao; Shibu, Abhishek; Jäkle, Frieder (December 2025, Angewandte Chemie International Edition)

   Abstract As prototypical organic electrochromic materials viologens have been extensively studied in display technologies, smart materials, and energy storage applications. Their properties can be fine‐tuned by introducing different substituents on the pyridine rings, fusion with heteroatoms, or insertion of π–conjugated linkers. In this article we study the effect of B‐N fused dipyridylanthracene (BDPA) as a novel linker unit in viologens on the electronic structure, optical properties, and electrochromic characteristics. Quaternization of pyridyl‐functionalized BDPA (1Py) by N‐methylation or complexation with B(C₆F₅)₃as a powerful Lewis acid gives rise to two fundamentally different π‐extended viologens, dicationic [1Py‐Me](PF₆)₂, and the neutral complex1Py‐BCF. We investigate the effect of these different quaternization methods on the LUMO energy, band gaps, absorption and emission, and the self‐sensitized reactivity toward oxygen. We also demonstrate facile electrochemical reduction to singly and multiply reduced species. Spectroelectrochemical and computational studies reveal formation of strongly colored doubly reduced species with a closed shell electronic configuration and prominent quinoidal delocalization. The corresponding radical anions give rise to absorptions in the near‐IR. A prototype electrochromic device with1Py‐BCFas the redox‐active material is also presented. 

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2. Effects of Optical See-Through Displays on Self-Avatar Appearance in Augmented Reality

   https://doi.org/10.1109/ISMAR-Adjunct57072.2022.00077  

   Doroodchi, Meelad; Ramos, Priscilla; Erickson, Austin; Furuya, Hiroshi; Benjamin, Juanita; Bruder, Gerd; Welch, Gregory F. (October 2022, Proc.of the IEEE International Symposium on Mixed and Augmented Reality (ISMAR) Workshop on Inclusion, Diversity, Equity, Accessibility, Transparency, and Ethics in XR (IDEATExR))

   Display technologies in the fields of virtual and augmented reality affect the appearance of human representations, such as avatars used in telepresence or entertainment applications, based on the user’s current viewing conditions. With changing viewing conditions, it is possible that the perceived appearance of one’s avatar changes in an unexpected or undesired manner, which may change user behavior towards these avatars and cause frustration in using the AR display. In this paper, we describe a user study (N=20) where participants saw themselves in a mirror standing next to their own avatar through use of a HoloLens 2 optical see-through head-mounted display. Participants were tasked to match their avatar’s appearance to their own under two environment lighting conditions (200 lux and 2,000 lux). Our results showed that the intensity of environment lighting had a significant effect on participants selected skin colors for their avatars, where participants with dark skin colors tended to make their avatar’s skin color lighter, nearly to the level of participants with light skin color. Further, in particular female participants made their avatar’s hair color darker for the lighter environment lighting condition. We discuss our results with a view on technological limitations and effects on the diversity of avatar representations on optical see-through displays. 

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3. Stretchable, Rehealable, Recyclable, and Reconfigurable Integrated Strain Sensor for Joint Motion and Respiration Monitoring

   https://doi.org/10.34133/2021/9846036  

   Shi, Chuanqian; Zou, Zhanan; Lei, Zepeng; Zhu, Pengcheng; Nie, Guohua; Zhang, Wei; Xiao, Jianliang (July 2021, Research)

   Cutting-edge technologies of stretchable, skin-mountable, and wearable electronics have attracted tremendous attention recently due to their very wide applications and promising performances. One direction of particular interest is to investigate novel properties in stretchable electronics by exploring multifunctional materials. Here, we report an integrated strain sensing system that is highly stretchable, rehealable, fully recyclable, and reconfigurable. This system consists of dynamic covalent thermoset polyimine as the moldable substrate and encapsulation, eutectic liquid metal alloy as the strain sensing unit and interconnects, and off-the-shelf chip components for measuring and magnifying functions. The device can be attached on different parts of the human body for accurately monitoring joint motion and respiration. Such a strain sensing system provides a reliable, economical, and ecofriendly solution to wearable technologies, with wide applications in health care, prosthetics, robotics, and biomedical devices. 

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4. Closed-Loop Control of Magnetic Modular Cubes for 2D Self-Assembly

   https://doi.org/10.1109/LRA.2023.3296008  

   Lu, Yitong; Bhattacharjee, Anuruddha; Taylor, Conlan C.; Leclerc, Julien; O'Kane, Jason M.; Kim, MinJun; Becker, Aaron T. (January 2023, IEEE Robotics and Automation Letters)

   Ani Hsieh (Ed.)

   Reconfigurable modular robots can dynamically assemble/disassemble to accomplish the desired task better. Magnetic modular cubes are scalable modular subunits with embedded permanent magnets in a 3D-printed cubic body and can be wirelessly controlled by an external, uniform, timevarying magnetic field. This paper considers the problem of self-assembling these modules into desired 2D polyomino shapes using such magnetic fields. Although the applied magnetic field is the same for each magnetic modular cube, we use collisions with workspace boundaries to rearrange the cubes. We present a closed-loop control method for self-assembling the magnetic modular cubes into polyomino shapes, using computer vision-based feedback with re-planning. Experimental results demonstrate that the proposed closed-loop control improves the success rate of forming 2D user-specified polyominoes compared to an open-loop baseline. We also demonstrate the validity of the approach over changes in length scales, testing with both 10mm edge length cubes and 2.8mm edge length cubes. 

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5. Modular Quantum Processor with an All-to-All Reconfigurable Router

   https://doi.org/10.1103/PhysRevX.14.041030  

   Wu, Xuntao; Yan, Haoxiong; Andersson, Gustav; Anferov, Alexander; Chou, Ming-Han; Conner, Christopher R; Grebel, Joel; Joshi, Yash J; Li, Shiheng; Miller, Jacob M; et al (November 2024, Physical Review X)

   Superconducting qubits provide a promising approach to large-scale fault-tolerant quantum computing. However, qubit connectivity on a planar surface is typically restricted to only a few neighboring qubits. Achieving longer-range and more flexible connectivity, which is particularly appealing in light of recent developments in error-correcting codes, however, usually involves complex multilayer packaging and external cabling, which is resource intensive and can impose fidelity limitations. Here, we propose and realize a high-speed on-chip quantum processor that supports reconfigurable all-to-all coupling with a large on-off ratio. We implement the design in a four-node quantum processor, built with a modular design comprising a wiring substrate coupled to two separate qubit-bearing substrates, each including two single-qubit nodes. We use this device to demonstrate reconfigurable controlled- $Z$gates across all qubit pairs, with a benchmarked average fidelity of $96.00\%\pm 0.08\%$and best fidelity of $97.14\%\pm 0.07\%$, limited mainly by dephasing in the qubits. We also generate multiqubit entanglement, distributed across the separate modules, demonstrating GHZ-3 and GHZ-4 states with fidelities of $88.15\%\pm 0.24\%$and $75.18\%\pm 0.11\%$, respectively. This approach promises efficient scaling to larger-scale quantum circuits and offers a pathway for implementing quantum algorithms and error-correction schemes that benefit from enhanced qubit connectivity. Published by the American Physical Society2024 

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