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  • 1.
    Armada Moreira, Adam
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Int Sch Adv Studies, Italy.
    Manan Dar, Abdul Manan
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Zhao, Zifang
    Columbia Univ, NY 10027 USA.
    Cea, Claudia
    Columbia Univ, NY 10027 USA.
    Gelinas, Jennifer
    Columbia Univ, NY 10032 USA.
    Berggren, Magnus
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Costa, Alex
    Univ Milan, Italy; Natl Res Council Italy CNR, Italy.
    Khodagholy, Dion
    Columbia Univ, NY 10027 USA.
    Stavrinidou, Eleni
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Swedish Univ Agr Sci, Sweden.
    Plant electrophysiology with conformable organic electronics: Deciphering the propagation of Venus flytrap action potentials2023In: Science Advances, E-ISSN 2375-2548, Vol. 9, no 30, article id eadh4443Article in journal (Refereed)
    Abstract [en]

    Electrical signals in plants are mediators of long-distance signaling and correlate with plant movements and responses to stress. These signals are studied with single surface electrodes that cannot resolve signal propagation and integration, thus impeding their decoding and link to function. Here, we developed a conformable multielectrode array based on organic electronics for large-scale and high-resolution plant electrophysiology. We performed precise spatiotemporal mapping of the action potential (AP) in Venus flytrap and found that the AP actively propagates through the tissue with constant speed and without strong directionality. We also found that spontaneously generated APs can originate from unstimulated hairs and that they correlate with trap movement. Last, we demonstrate that the Venus flytrap circuitry can be activated by cells other than the sensory hairs. Our work reveals key properties of the AP and establishes the capacity of organic bioelectronics for resolving electrical signaling in plants contributing to the mechanistic understanding of long-distance responses in plants.

  • 2.
    Armada Moreira, Adam
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Diacci, Chiara
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Manan Dar, Abdul Manan
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Berggren, Magnus
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Simon, Daniel
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Stavrinidou, Eleni
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Swedish Univ Agr Sci, Sweden.
    Benchmarking organic electrochemical transistors for plant electrophysiology2022In: Frontiers in Plant Science, ISSN 1664-462X, E-ISSN 1664-462X, Vol. 13, article id 916120Article in journal (Refereed)
    Abstract [en]

    Plants are able to sense and respond to a myriad of external stimuli, using different signal transduction pathways, including electrical signaling. The ability to monitor plant responses is essential not only for fundamental plant science, but also to gain knowledge on how to interface plants with technology. Still, the field of plant electrophysiology remains rather unexplored when compared to its animal counterpart. Indeed, most studies continue to rely on invasive techniques or on bulky inorganic electrodes that oftentimes are not ideal for stable integration with plant tissues. On the other hand, few studies have proposed novel approaches to monitor plant signals, based on non-invasive conformable electrodes or even organic transistors. Organic electrochemical transistors (OECTs) are particularly promising for electrophysiology as they are inherently amplification devices, they operate at low voltages, can be miniaturized, and be fabricated in flexible and conformable substrates. Thus, in this study, we characterize OECTs as viable tools to measure plant electrical signals, comparing them to the performance of the current standard, Ag/AgCl electrodes. For that, we focused on two widely studied plant signals: the Venus flytrap (VFT) action potentials elicited by mechanical stimulation of its sensitive trigger hairs, and the wound response of Arabidopsis thaliana. We found that OECTs are able to record these signals without distortion and with the same resolution as Ag/AgCl electrodes and that they offer a major advantage in terms of signal noise, which allow them to be used in field conditions. This work establishes these organic bioelectronic devices as non-invasive tools to monitor plant signaling that can provide insight into plant processes in their natural environment.

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  • 3.
    Padinhare, Harikesh
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Yang, Chiyuan
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Tu, Deyu
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Gerasimov, Jennifer
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Manan Dar, Abdul Manan
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Armada Moreira, Adam
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Massetti, Matteo
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Kroon, Renee
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Bliman, David
    Univ Gothenburg, Sweden.
    Olsson, Roger
    Univ Gothenburg, Sweden; Lund Univ, Sweden.
    Stavrinidou, Eleni
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Berggren, Magnus
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. N Ink AB, Tekn Ringen 7, SE-58330 Linkoping, Sweden.
    Fabiano, Simone
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. N Ink AB, Tekn Ringen 7, SE-58330 Linkoping, Sweden.
    Organic electrochemical neurons and synapses with ion mediated spiking2022In: Nature Communications, E-ISSN 2041-1723, Vol. 13, no 1, article id 901Article in journal (Refereed)
    Abstract [en]

    Future brain-machine interfaces, prosthetics, and intelligent soft robotics will require integrating artificial neuromorphic devices with biological systems. Due to their poor biocompatibility, circuit complexity, low energy efficiency, and operating principles fundamentally different from the ion signal modulation of biology, traditional Silicon-based neuromorphic implementations have limited bio-integration potential. Here, we report the first organic electrochemical neurons (OECNs) with ion-modulated spiking, based on all-printed complementary organic electrochemical transistors. We demonstrate facile bio-integration of OECNs with Venus Flytrap (Dionaea muscipula) to induce lobe closure upon input stimuli. The OECNs can also be integrated with all-printed organic electrochemical synapses (OECSs), exhibiting short-term plasticity with paired-pulse facilitation and long-term plasticity with retention >1000 s, facilitating Hebbian learning. These soft and flexible OECNs operate below 0.6 V and respond to multiple stimuli, defining a new vista for localized artificial neuronal systems possible to integrate with bio-signaling systems of plants, invertebrates, and vertebrates. The integration of artificial neuromorphic devices with biological systems plays a fundamental role for future brain-machine interfaces, prosthetics, and intelligent soft robotics. Harikesh et al. demonstrate all-printed organic electrochemical neurons on Venus flytrap that is controlled to open and close.

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  • 4.
    Stavrinidou, Eleni
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Swedish Univ Agr Sci, Sweden.
    Dufil, Gwennael
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Bernacka Wojcik, Iwona
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Armada Moreira, Adam
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Plant Bioelectronics and Biohybrids: The Growing Contribution of Organic Electronic and Carbon-Based Materials2022In: Chemical Reviews, ISSN 0009-2665, E-ISSN 1520-6890, Vol. 122, no 4, p. 4847-4883Article, review/survey (Refereed)
    Abstract [en]

    Life in our planet is highly dependent on plants as they are the primary source of food, regulators of the atmosphere, and providers of a variety of materials. In this work, we review the progress on bioelectronic devices for plants and biohybrid systems based on plants, therefore discussing advancements that view plants either from a biological or a technological perspective, respectively. We give an overview on wearable and implantable bioelectronic devices for monitoring and modulating plant physiology that can be used as tools in basic plant science or find application in agriculture. Furthermore, we discuss plant wearable devices for monitoring a plants microenvironment that will enable optimization of growth conditions. The review then covers plant biohybrid systems where plants are an integral part of devices or are converted to devices upon functionalization with smart materials, including self-organized electronics, plant nanobionics, and energy applications. The review focuses on advancements based on organic electronic and carbon-based materials and discusses opportunities, challenges, as well as future steps.

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  • 5.
    Hirata, Rafael Y. S.
    et al.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Oliveira, Roberto N.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Silva, Mariana S. C. F.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Armada Moreira, Adam
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Vaz, Sandra H.
    Univ Lisbon, Portugal; Univ Lisbon, Portugal.
    Ribeiro, Filipa F.
    Univ Lisbon, Portugal; Univ Lisbon, Portugal.
    Sebastiao, Ana Maria
    Univ Lisbon, Portugal; Univ Lisbon, Portugal.
    Lemes, Jessica A.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    de Andrade, Jose S.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Rosario, Barbara A.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Cespedes, Isabel C.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Viana, Milena B.
    Univ Fed Sao Paulo UNIFESP, Brazil.
    Platinum nanoparticle-based microreactors protect against the behavioral and neurobiological consequences of chronic stress exposure2022In: Brain Research Bulletin, ISSN 0361-9230, E-ISSN 1873-2747, Vol. 190Article in journal (Refereed)
    Abstract [en]

    Excitotoxicity is described as the exacerbated activation of glutamate AMPA and NMDA receptors that leads to neuronal damage, and ultimately to cell death. Astrocytes are responsible for the clearance of 80-90% of syn-aptically released glutamate, preventing excitotoxicity. Chronic stress renders neurons vulnerable to excitotox-icity and has been associated to neuropsychiatric disorders, i.e., anxiety. Microreactors containing platinum nanoparticles (Pt-NP) and glutamate dehydrogenase have shown in vitro activity against excitotoxicity. The purpose of the present study was to investigate the in vivo effects of these microreactors on the behavioral and neurobiological effects of chronic stress exposure. Rats were either unstressed or exposed for 2 weeks to an unpredictable chronic mild stress paradigm (UCMS), administered intra-ventral hippocampus with the micro -reactors (with or without the blockage of astrocyte functioning), and seven days later tested in the elevated T -maze (ETM; Experiment 1). The ETM allows the measurement of two defensive responses, avoidance and escape, in terms of psychopathology respectively related to generalized anxiety and panic disorder. Locomotor activity in an open field was also measured. Since previous evidence shows that stress inhibits adult neurogenesis, we evaluated the effects of the different treatments on the number of cells expressing the marker of migrating neuroblasts doublecortin (DCX) in the dorsal and ventral hippocampus (Experiment 2). Results showed that UCMS induces anxiogenic effects, increases locomotion, and decreases the number of DCX cells in the dorsal and ventral hippocampus, effects that were counteracted by microreactor administration. This is the first study to demonstrate the in vivo efficacy of Pt-NP against the behavioral and neurobiological effects of chronic stress exposure.

  • 6.
    Armada Moreira, Adam
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Bisesi, Ave
    Univ Minnesota, MN 55455 USA.
    Transgender Day of Visibility 2022: an interview with Adam Armada-Moreira and Ave Bisesi on trans experiences in STEM2022In: Communications Biology, E-ISSN 2399-3642, Vol. 5, no 1, article id 288Article in journal (Other academic)
    Abstract [en]

    This year at Communications Biology, we wanted to celebrate Transgender Day of Visibility by highlighting researchers at multiple career stages. In this Q&A, we asked early-career biologists about their own achievements, academic experiences, and how STEM can better support trans researchers.

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  • 7.
    Armada Moreira, Adam
    et al.
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Cizauskas, Carrie
    Independent .
    Fleury, Gabriela
    Rainforest Trust, VA USA.
    Forslund, Sofia Kirke
    Charite, Germany.
    Guthman, Eartha Mae
    Princeton Univ, NJ 08544 USA.
    Hanafiah, Aflah
    Penn State Univ, PA 16802 USA.
    Hope, Jen M.
    Stanford Univ, CA 94305 USA.
    Jayasinghe, Izzy
    Univ Sheffield, England.
    McSweeney, Danny
    Univ Massachusetts, MA 01003 USA.
    Young, Iris D.
    UC, CA USA.
    STEM Pride: Perspectives from transgender, nonbinary, and genderqueer scientists2021In: Cell, ISSN 0092-8674, E-ISSN 1097-4172, Vol. 184, no 13, p. 3352-3355Article in journal (Other academic)
    Abstract [en]

    In celebration of Pride Month, we asked transgender, genderqueer, and nonbinary scientists to tell us about what fascinates them, their ambitions and achievements, and how their gender identities have shaped their experiences in STEM. We owe a special thanks to 500 Queer Scientists (https://500queerscientists.com/), whose network and efforts at increasing LGBTQ+ scientists visibility made this article possible.

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