Astro/Nano-mineralogy  (NNM group research lines)

Astronomically, nanosilicates are intermediates in cosmic dust grain formation (e.g. around evolved stars) and make up a significant mass fraction of the interstellar dust grain population, where they play a significant astrochemical role. Terrestrially, nanosilicates take part in mineral nucleation, growth and dissolution. Technologically, these species also lay at the heart of the debate concerning the pre- and post-nucleated regime of important nanoporous silicate materials (e.g. zeolites) during hydrothermal synthesis

AME fig cropped
 ASC ESC cover 2019 small size

Assessing the viability of silicate nanoclusters as carriers of the anomalous microwave emission: a quantum mechanical study

A. Macia Escatller, S. T. Bromley, Astronomy & Astrophysics (2020) 634, A77

Structure and Properties of Nanosilicates with Olivine (Mg2SiO4)N and Pyroxene (MgSiO3)N Compositions

A. Macia Escatller, Tomas Lazaukas, S. M. Woodley, S. T. Bromley, ACS Earth and Space Chemistry (2019) 32390
ACS ESC Silicate grains jp9b06713 0008 1

What Can Infrared Spectra Tell Us about the Crystallinity of Nanosized Interstellar Silicate Dust Grains?

L. Zamirri, A. Macia Escatller, J. Mariñoso Guiu, P. Ugliengo, S. T. Bromley, ACS Earth and Space Chemistry (2019) 3, 2323.

Understanding H2 Formation on Hydroxylated Pyroxene Nanoclusters: Ab Initio study of Reaction Energetics and Kinetics

B.Kerkeni, M.C. Bacchus-Montabonel, X. Shan, S. T. Bromley, Journal of Physical Chemistry A  (2019) 123, 9282

H2 on hyrdoxylated nanosilicate

SiO nucleation TOC

H2 on nanosilicates PCCP TOC

B. Kerkeni, M-C. Bacchus-Montabonel, S. T. Bromley, Molecular Astrophysics (2017), 7, 1.
S. T. Bromley, J. C. Gomez Martin, J. M. C. Plane, Physical Chemistry Chemical Physics (2016), 18, 26913.

Published cover PCCP2014

H2 formation MNRAS2013 cropped

Hydroxylated silica clusters PCCP2013

 
S. T. Bromley, T. P. M. Goumans, E. Herbst, A. P. Jones, B. Slater, Physical Chemistry Chemical Physics (2014) 16, 18623.

Competing mechanisms of catalytic H2 formation and dissociation on ultrasmall silicate nanocluster dust grains

B. Kerkeni, S. T. Bromley, Monthly Notices of the Royal Astronomical Society (2013) 435, 1486.

Hydroxylation of silica nanoclusters (SiO2)M(H2O)N, M = 4, 8, 16, 24: stability and structural trends 

K. E. Jelfs, E. Flikkema, S. T. Bromley, Physical Chemistry Chemical Physics (2013) 15, 20438.

TiSiMgO nucleation PhilTrans2013

Chem Comm Cover

Astro nucleation

Stardust silicate nucleation kick-started by SiO2 + TiO2 

T. P. M. Goumans, S. T. Bromley, Philosophical Transactions of the Royal Society (2013) 371, 20110580.

Evidence for atomic mixing via multiple intermediates during the dynamic interconversion of silicate oligomers in solution

K. Jelfs, E. Flikkema and S. T. Bromley, Chemical Communications (2012), 48, 46.

Efficient nucleation of stardust silicates via heteromolecular homogeneous nucleation

T. P. M. Goumans, S. T. Bromley, Monthly Notices of the Royal Astronomical Society (2012) 420, 3344.
H addition on nanosilicates MNRAS2011 FC clusters  

Hydrogen and oxygen adsorption on a nanosilicate - a quantum chemical study

T. P. M. Goumans and S. T. Bromley, Monthly Notices of the Royal Astronomical Society (2011) 414, 1285.

Defective to fully coordinated crossover in complex directionally bonded nanoclusters

E. Flikkema and S. T. Bromley, Phys. Rev. B (2009) 80035402.

 

 

 

 

 

Columnar-to-Disk Structural Transition in Nanoscale (SiO2)N Clusters S. T. Bromley, E. Flikkema, Phys. Rev. Lett. (2005),  95, 185505.

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