TY - JOUR
T1 - Coalescence and collisions of gold nanoparticles
AU - Ant́unez-Garćia, Joel
AU - Mej́ia-Rosales, Sergio
AU - Ṕerez-Tijerina, Eduardo
AU - Montejano-Carrizales, Juan Mart́in
AU - Jośe-Yacaḿan, Miguel
PY - 2010
Y1 - 2010
N2 - We study the assembling of small gold clusters subject to collisions and close contact coalescence by using molecular dynamics simulations to simulate events that occur typically in the sputtering process of synthesis. Our results support the notion that the kinetics of coalescence processes strongly determine the geometry and structure of the final particle. While impact velocities, relative orientations, and the initial shape of the interacting particles are unlikely to strictly determine the structural details of the newly formed particle, we found that high initial temperatures and/or impact velocities increase the probability of appearance of icosahedral-like structures, Wulff polyhedra are likely to be formed as a product of the interactions between nanospheres, while the appearance of fcc particles of approximately cuboctahedral shape is mainly due to the interaction between icosahedra.
AB - We study the assembling of small gold clusters subject to collisions and close contact coalescence by using molecular dynamics simulations to simulate events that occur typically in the sputtering process of synthesis. Our results support the notion that the kinetics of coalescence processes strongly determine the geometry and structure of the final particle. While impact velocities, relative orientations, and the initial shape of the interacting particles are unlikely to strictly determine the structural details of the newly formed particle, we found that high initial temperatures and/or impact velocities increase the probability of appearance of icosahedral-like structures, Wulff polyhedra are likely to be formed as a product of the interactions between nanospheres, while the appearance of fcc particles of approximately cuboctahedral shape is mainly due to the interaction between icosahedra.
KW - Coalescence
KW - Collisions
KW - Common neighbor analysis
KW - Gold nanoparticles
KW - Molecular dynamics
UR - http://www.scopus.com/inward/record.url?scp=84879104564&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879104564&partnerID=8YFLogxK
U2 - 10.3390/ma4020368
DO - 10.3390/ma4020368
M3 - Article
AN - SCOPUS:84879104564
SN - 1996-1944
VL - 4
SP - 368
EP - 379
JO - Materials
JF - Materials
IS - 2
ER -