A Transient Nano-Dense Molecular State in Nanoparticle Inception: Bridging Physical Clustering and Chemical Stabilization
Author: Dr. Ahmad Saylam
Document type: Open preprint
Version: v1
Publication date:
Scientific status: Testable scientific hypothesis. The transient nano-dense molecular state is proposed as a physically interpretable description of the molecular-to-particle transition and is not presented as an established universal microscopic mechanism.
Zenodo record: https://zenodo.org/records/19730735
Abstract
The formation of nanoparticles in combustion systems, including soot and selected inorganic materials, involves coupled physical and chemical processes that remain incompletely understood. Current descriptions tend to emphasise either gas-phase chemical growth pathways or physically driven clustering mechanisms.
This work proposes a testable, physically grounded hypothesis in which the inception of nanoparticles proceeds through the formation of a transient, non-equilibrium, nano-dense molecular state (NDMS) composed of precursor species. In this state, intermolecular interactions arising primarily from quantum-mechanical dispersion forces and configurational effects promote local densification and increase encounter lifetimes. Retained molecular mobility enables coalescence and enhances reactive stabilisation. Subsequent chemical processes reduce volatility and progressively stabilise the evolving structure, leading to the formation of persistent particles.
The hypothesis provides a continuous description of inception that links gas-phase chemistry and condensed-phase particle formation without requiring a strictly discrete nucleation event. It is consistent with selected experimental and computational observations in soot formation, although the relative contributions of physical clustering and chemical stabilisation remain under active investigation. Its possible application to inorganic systems is considered in the context of cluster-mediated particle formation.
The hypothesis yields experimentally testable predictions concerning cluster lifetimes, spectroscopic signatures and deviations from classical nucleation behaviour. Further quantitative experimental and computational studies are required to determine the existence, properties and kinetic relevance of the proposed transient nano-dense molecular state.
Full text
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Recommended citation
Saylam, A. (2026). A Transient Nano-Dense Molecular State in Nanoparticle Inception: Bridging Physical Clustering and Chemical Stabilization. Version v1. Zenodo. https://doi.org/10.5281/zenodo.19730735
Companion repository
The public repository contains companion papers, scientific notes, model-equation documentation, Python demonstrations, notebooks, figures and illustrative data.
The repository materials support scientific communication, reproducibility and hypothesis development. They are not presented as a validated predictive model for a specific flame, fuel, pressure, temperature or particle system.