TY - JOUR
T1 - General Approach to the Evolution of Singlet Nanoparticles from a Rapidly Quenched Point Source
AU - Feng, Jicheng
AU - Huang, Luyi
AU - Ludvigsson, Linus
AU - Messing, Maria
AU - Maisser, A.
AU - Biskos, George
AU - Schmidt-Ott, Andreas
PY - 2016
Y1 - 2016
N2 - Among the numerous point vapor sources, microsecond-pulsed spark ablation at atmospheric pressure is a versatile and environmentally friendly method for producing ultrapure inorganic nanoparticles ranging from singlets having sizes smaller than 1 nm to larger agglomerated structures. Due to its fast quenching and extremely high supersaturation, coagulational growth already begins at the atomic scale at room temperature. On the basis of this knowledge, we develop a simple semiempirical yet versatile model for predicting the size distribution of singlet particles as a function of the process conditions. The model assumes that a plume of a turbulent aerosol flow flares out from a concentrated point source, eventually reaching the walls of the confinement where a fraction of the particles is deposited. Despite the complexity of the entire process, the concentration and size evolution of particles can be adequately described by a first-order differential equation accounting for coagulation, turbulent dilution, and diffusional deposition to the walls. The model provides a simple and practical tool that can generally be used to design and control point vapor source reactors for the synthesis of singlets with tunable sizes starting from that of single atoms.
AB - Among the numerous point vapor sources, microsecond-pulsed spark ablation at atmospheric pressure is a versatile and environmentally friendly method for producing ultrapure inorganic nanoparticles ranging from singlets having sizes smaller than 1 nm to larger agglomerated structures. Due to its fast quenching and extremely high supersaturation, coagulational growth already begins at the atomic scale at room temperature. On the basis of this knowledge, we develop a simple semiempirical yet versatile model for predicting the size distribution of singlet particles as a function of the process conditions. The model assumes that a plume of a turbulent aerosol flow flares out from a concentrated point source, eventually reaching the walls of the confinement where a fraction of the particles is deposited. Despite the complexity of the entire process, the concentration and size evolution of particles can be adequately described by a first-order differential equation accounting for coagulation, turbulent dilution, and diffusional deposition to the walls. The model provides a simple and practical tool that can generally be used to design and control point vapor source reactors for the synthesis of singlets with tunable sizes starting from that of single atoms.
KW - nanoparticles
KW - Particle growth
KW - Aerosol
KW - coagulation
KW - coalesence
UR - https://www.researchgate.net/publication/286334103_General_Approach_to_the_Evolution_of_Singlet_Nanoparticles_from_a_Rapidly_Quenched_Point_Source
UR - http://resolver.tudelft.nl/uuid:7e6f6af3-20a2-438f-9d0d-369f82236f48
U2 - 10.1021/acs.jpcc.5b06503
DO - 10.1021/acs.jpcc.5b06503
M3 - Article
VL - 120
SP - 621
EP - 630
JO - The Journal of Physical Chemistry C
JF - The Journal of Physical Chemistry C
SN - 1932-7455
IS - 1
ER -