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Open research questions in Micro and Nano Robotics

200 gap statements mined from Micro and Nano Robotics papers in our 7.9M-paper local library, which holds 1,721 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The lack of a robust, non-invasive tool for investigating the mechanisms of bacteria-surface interactions. Disparate estimates of cell-surface distances reported previously.

    High-resolution measurement of near-surface bacterial swimming reveals bimodal cell-surface separations · 2026 · DOI

  • Experimental realizations of particles with active forces that remain constant in time are difficult. Simulating the behavior of dense active systems is challenging due to the complex interactions between particles. Analyzing the growth of correlations and flow patterns in these systems is a technical challenge.

    Dynamics of self-organization in dense persistent active matter · 2026 · DOI

  • Experimental realizations of particles with active forces that remain constant in time irrespective of the position or the orientation of the particles is difficult. The study is based on simulations, which may not fully capture the behavior of real systems. The system size is limited to L = 180 with 38880 particles.

    Dynamics of self-organization in dense persistent active matter · 2026 · DOI

  • The study uses immersed boundary-lattice Boltzmann simulations, which may not capture all physical effects. The simulations are limited to a specific range of parameters (e.g. ν = 0.65, Cn = 0.8). The study focuses on a specific type of particle (deformable slippers).

    Hydrodynamic switching fronts polarize deformable particle trains · 2026 · DOI

  • The complexity of ciliary flows and the need for a coarse-graining approach. The broken symmetries of the resistance matrix and the need for a perturbative solution. The challenge of estimating the energetic cost of odd slip from a microscopic model.

    Odd slip at chiral active surfaces · 2026 · DOI

  • Traditional analytical systems have limitations. Conventional platforms lack the ability to resolve microscale biological phenomena. Scalability, energy autonomy, and data standardization are key challenges.

    AI-Integrated Micro/Nanorobots for Biomedical Applications: Recent Advances in Design, Fabrication, and Functions · 2025 · DOI

  • However, despite their successful fabrication by several different research groups, a thorough design strategy encompassing the optimized kinematic performance of the three fundamental biomimetic swimming modes at miniaturized length scales has not been reported until now.

    Computational and experimental design of fast and versatile magnetic soft robotic low Re swimmers · 2025 · DOI

  • Although twitching motility in unrestricted conditions has been extensively studied, the effects of spatial confinement on this behaviour are not well understood.

    Vertical confinement enhances surface exploration in bacterial twitching motility · 2024 · DOI

  • There is a gap in the use of torons for micro-cargo delivery. Prior work has not explored the use of torons for targeted delivery in confined channels.

    Soft Colloidal Robots: Magnetically Guided Liquid Crystal Torons for Targeted Micro‐Cargo Delivery · 2026 · DOI

  • Further analysis of the parameter space is needed to fully understand the conditions under which intrinsic directional biases can be reliably distinguished from emerging anisotropy. Nonlinear reinforcement of the dipole modes should be accounted for in future work. Experimental validation of the predictions is necessary to confirm the results.

    Inverse Statistics of Active Matter Trajectories to Distinguish Interaction Kernel Anisotropy from Emergent Correlations · 2026 · DOI

  • Conventional static SERS substrates are often limited by inefficient analyte capture and poor spatial controllability. Chemically powered systems may limit their use in biological or environmentally relevant samples due to toxicity and reduced biocompatibility.

    Light-guided SERS-active micromotor clusters for on-site detection of microorganisms · 2026 · DOI

  • The paper suggests hybrid workflows combining statistical decomposition (PCA), dynamical mode extraction (DMD), and model-based optimization (GA) as a promising strategy, but this integrated approach has not been explicitly implemented or validated in the presented study.

    Elucidating motion patterns in sperm cell motion with dynamic mode decomposition · 2026 · DOI

  • Limited efficacy of current methods due to complex biological barriers.

    Machine-intelligent multimodal algebot for intracavitary chemotherapy · 2026 · DOI

  • The classical approach to assessing cell motility is limited to population averages and cannot resolve behavior at the single-cell level, - The polar arrangement of the flagellum causes tethered cells to rub against the interface during rotation and destabilizes the cell's center of rotation, - No single detection method can fully capture the complexity of an entire…

    Pseudomonas aeruginosa : a model system for studying the behavior of unbiased flagellar motors · 2026 · DOI

  • Investigating the mechanisms of bacteria-surface interactions, - Developing strategies to control biofilm formation on medical implants and industrial surfaces, - Exploring the relationships among swimming velocity, trajectory curvature, and separation…

    High-resolution measurement of near-surface bacterial swimming reveals bimodal cell-surface separations · 2026 · DOI

  • Development of more efficient and biocompatible propulsion mechanisms for SERS-active micromotors. Exploration of the potential applications of micromotor-based SERS in various fields such as biomedical research and environmental monitoring.

    Light-guided SERS-active micromotor clusters for on-site detection of microorganisms · 2026 · DOI

  • Investigating the behavior of deformable particles in different flow conditions. Exploring the application of the findings to red-blood-cell train organization in microcirculation. Studying the microfluidic control of deformable-particle assemblies.

    Hydrodynamic switching fronts polarize deformable particle trains · 2026 · DOI

  • Investigation of related odd-slip responses from hydrodynamic interactions among densely packed cilia or flagella - Study of the effects of odd slip on microparticle dynamics in different…

    Odd slip at chiral active surfaces · 2026 · DOI

  • Ongoing evaluations to refine the understanding of the long-term exposure impacts of electromagnetic actuation, - Further research on the system's functionality, operation, and performance in different…

    Development of 6D Electromagnetic Actuation for Micro/Nanorobots in High Viscosity Fluids for Drug Delivery · 2025 · DOI

  • Achieving precise actuation, trajectory control, and stability in dynamic, high-viscosity biological environments. Overcoming limitations in actuation efficiency, trajectory stability, and accurate path-tracking of micro/nanorobots.

    Development of 6D Electromagnetic Actuation for Micro/Nanorobots in High Viscosity Fluids for Drug Delivery · 2025 · DOI

  • The study identifies a gap in the understanding of the mechanisms underlying the enhanced motility observed in sperm bundles. The research aims to elucidate the role of flagellar synchronization in sperm cell motion.

    Elucidating motion patterns in sperm cell motion with dynamic mode decomposition · 2026 · DOI

  • To apply the framework to the study of biological systems. To extend the framework to more complex internal state dynamics. To use the framework to design and optimize artificial active matter systems.

    Thermodynamics of active matter with internal degrees of freedom · 2026 · DOI

  • Conventional therapies have limitations such as poor specificity and systemic toxicity - There is a need for targeted drug delivery…

    Nanorobots as novel drug delivery systems: A comprehensive pharmaceutical review · 2026 · DOI

  • Further evaluation of the proposed approach in human clinical trials. Exploration of the application of the proposed approach in other types of cancer treatment.

    Machine-intelligent multimodal algebot for intracavitary chemotherapy · 2026 · DOI

  • The study does not provide a comparison with other existing systems, - The thermal management is only evaluated through simulation, - The motion control experiments are limited to magnetic beads and nanorobotic…

    An Enhanced Electromagnetic Manipulation System with a Large Workspace, High-Gradient Magnetic Actuation, and Efficient Thermal Management · 2026 · DOI

Most-cited papers in Micro and Nano Robotics

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Open questions raised by papers listed on this page include: (1) The lack of a robust, non-invasive tool for investigating the mechanisms of bacteria-surface interactions (“High-resolution measurement of near-surface bacterial swimming reveals bimodal…”, 2026); (2) Further analysis of the parameter space is needed to fully understand the conditions under which intrinsic directional biases can be reliably distinguished from emerging anisotropy (“Inverse Statistics of Active Matter Trajectories to Distinguish Interaction…”, 2026); (3) Although twitching motility in unrestricted conditions has been extensively studied, the effects of spatial confinement on this behaviour are not well understood (“Vertical confinement enhances surface exploration in bacterial twitching…”, 2024). 200 gap statements have been mined from Micro and Nano Robotics papers in our 7.9M-paper local library, which holds 1,721 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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