A distributed activation energy model of thermodynamically inhibited nucleation and growth reactions and its application to the beta-delta phase transition of HMX

Article Abstract:

Detailed and global models are presented for thermodynamically inhibited nucleation-growth reactions and applied to the beta-delta phase transition of nitramine octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX). The model contains separate kinetic parameters for the nucleation process, including an activation energy distribution resulting from a distribution of defect energies, and for movement of the resulting reaction interface within a single particle.

Phase transformations (Statistical physics), Phase transitions (Physics), Thermodynamics, Nucleation, Nucleation (Chemistry)

---

Effect of environmental conditions on dip pen nanolithography of mercapthohexadecanoic

Article Abstract:

The transport of an amphiphilivc molecule, mercaptohexadecanoic acid (MHA) from the tip of an atomic force microscope (AFM) onto a gold substrate is examined to understand the process of dip-pen nanolithography (DPN). The findings indicate that the MHA is mobile in the absence of a water meniscus, supporting a dual transport mechanism, whereby at low RH, thermal diffusion drives the dry deposition of MHA.

Analysis, Carboxylic acids, Properties, Nanolithography

---

Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope

Article Abstract:

The activation energy for evaporation of pentaerythritol tetranitrate (PETN) nanoislands formed by spin coating studied by employing atomic force microscopy (AFM) demonstrate AFM to be a useful tool to measure thermodynamic properties with a nanoscale probe.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Pentaerythritol, Thermal properties, Chemical properties, Chemical thermodynamics

Similar abstracts:

• Abstracts: Nuclear spin relaxation driven by intermolecular dipolar interactions: The role of solute-solvent pair correlations in the modeling of spectral density
• Abstracts: Orientational control of the physiological reaction of cytochrome c oxidase tethered to a gold electrode. Redox-dependent pK(sub a) of Cu(sub B) histidine ligand in cytochrome c oxidase
• Abstracts: Disintegration mechanisms of charged aqueous nanodroplets studied by simulations and analytical models. Quantitative characterization of ion pairing and cluster formation in strong 1:1 electrolytes
• Abstracts: Marked variations of dissociation energy and H-bond character of the guanine-cytosine base pair induced by one-electron oxidation and Li(super +) cation coupling
• Abstracts: Two-component system C[Cl.sub.4]{[CH.sub.3]}[.sub.3]CBr: Extrema in equilibria involving orientationally disordered phases

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.