Paper List
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Autonomous Agents Coordinating Distributed Discovery Through Emergent Artifact Exchange
This paper addresses the fundamental limitation of current AI-assisted scientific research by enabling truly autonomous, decentralized investigation w...
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D-MEM: Dopamine-Gated Agentic Memory via Reward Prediction Error Routing
This paper addresses the fundamental scalability bottleneck in LLM agentic memory systems: the O(N²) computational complexity and unbounded API token ...
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Countershading coloration in blue shark skin emerges from hierarchically organized and spatially tuned photonic architectures inside skin denticles
This paper solves the core problem of how blue sharks achieve their striking dorsoventral countershading camouflage, revealing that coloration origina...
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Human-like Object Grouping in Self-supervised Vision Transformers
This paper addresses the core challenge of quantifying how well self-supervised vision models capture human-like object grouping in natural scenes, br...
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Hierarchical pp-Adic Framework for Gene Regulatory Networks: Theory and Stability Analysis
This paper addresses the core challenge of mathematically capturing the inherent hierarchical organization and multi-scale stability of gene regulator...
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Towards unified brain-to-text decoding across speech production and perception
This paper addresses the core challenge of developing a unified brain-to-text decoding framework that works across both speech production and percepti...
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Dual-Laws Model for a theory of artificial consciousness
This paper addresses the core challenge of developing a comprehensive, testable theory of consciousness that bridges biological and artificial systems...
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Pulse desynchronization of neural populations by targeting the centroid of the limit cycle in phase space
This work addresses the core challenge of determining optimal pulse timing and intensity for desynchronizing pathological neural oscillations when the...
Collective adsorption of pheromones at the water-air interface
Aix Marseille Univ, CNRS, Centrale Med, IRPHE (UMR 7342), Marseille, France | ICSM, CEA, CNRS, ENSCM, Univ. Montpellier, Marcoule, France | Institut de Recherche sur la Biologie de l’Insecte, UMR 7261, CNRS-Université de Tours, Tours, France
30秒速读
IN SHORT: This paper addresses the core challenge of understanding how amphiphilic pheromones, previously assumed to be transported in the gas phase, can be stabilized and concentrated at the water-air interface of atmospheric aerosols through collective adsorption and a 2D phase transition.
核心创新
- Methodology Presents state-of-the-art all-atom molecular dynamics simulations to construct a full Langmuir adsorption isotherm for a pheromone monolayer, a comprehensive approach rare in the field.
- Biology Quantifies the collective adsorption free energy gain (~2kBT per molecule) for bombykol at the water-air interface, providing a mechanistic explanation for pheromone enrichment on atmospheric aerosols.
- Theory Identifies and characterizes a two-dimensional liquid-gas phase transition within the pheromone monolayer, modeled successfully with a soft-sticky particle equation of state.
主要结论
- Collective interactions within a bombykol monolayer at the water-air interface provide a stabilization free energy of approximately 2kBT per molecule, significantly enhancing adsorption compared to individual molecules.
- The monolayer exhibits a clear two-dimensional liquid-gas phase transition, accurately described by a soft-sticky particle equation of state, with the transition plateau evident in the surface tension vs. concentration isotherm.
- The calculated adsorption free energy increases under lower estimates of the condensing surface concentration (ΓC), indicating that pheromone adsorption onto aerosols is more favorable in dilute regimes, relevant for atmospheric conditions.
摘要: Understanding the phase behaviour of pheromones and other messaging molecules remains a significant and largely unexplored challenge, even though it plays a central role in chemical communication. Here, we present all-atom molecular dynamics simulations to investigate the behavior of bombykol, a model insect pheromone, adsorbed at the water–air interface. This system serves as a proxy for studying the amphiphilic nature of pheromones and their interactions with aerosol particles in the atmosphere. Our simulations reveal the molecular organization of the bombykol monolayer and its adsorption isotherm. A soft-sticky particle equation of state accurately describes the monolayer’s behavior. The analysis uncovers a two-dimensional liquid–gas phase transition within the monolayer. Collective adsorption stabilises the molecules at the interface and the calculated free energy gain is approximately 2kBT. This value increases under lower estimates of the condensing surface concentration, thereby enhancing pheromone adsorption onto aerosols. Overall, our findings hold broad relevance for molecular interface science, atmospheric chemistry, and organismal chemical communication, particularly in highlighting the critical role of phase transition phenomena.