TY - JOUR
T1 - Polymer/Trimer/Metal Complex Mixtures as Precursors of Gold Nanoparticles
T2 - Tuning the Morphology in the Solid-State
AU - Valenzuela, Carlos Díaz
AU - Carriedo, Gabino A.
AU - Valenzuela, M. Luisa
AU - Zúñiga, Luis
AU - O'Dwyer, Colm
PY - 2012/3
Y1 - 2012/3
N2 - The pyrolysis of several physical mixtures of AuCl(PPh 3) with polymeric [NP(O 2C 12H 8)] n or cyclic N 3P 3(O 2C 12H 8) 3 phosphazenes, formed as solid powders or films with different molar ratios, have been studied under air and at 800 °C. The characterization of the products has shown that the particle size and morphology are strongly dependent on the nature of the phosphazene, the phosphazene/AuCl(PPh 3) molar ratio and on the preparation methodology. Gold nanoparticles (NPs) with mean sizes as small as 3. 5 nm were obtained from a [NP(O 2C 12H 8)] n/AuCl(PPh 3) 1:1 film. The particle morphology was also strongly dependent on the experimentally conditions of the pyrolysis. Powdered materials exhibit a 3-D irregular morphology in the mixture [NP(O 2C 12H 8)] n/AuCl(PPh 3) 3:1 film, and gold foams in the 1:1 ratio, both from the [NP(O 2C 12H 8)] n/AuCl(PPh 3) as well as N 3P 3(O 2C 12H 8) 3/AuCl(PPh 3) mixtures. These results show for the first time the possibility of controlling morphology and size of gold particles obtained by solid-state reactions.
AB - The pyrolysis of several physical mixtures of AuCl(PPh 3) with polymeric [NP(O 2C 12H 8)] n or cyclic N 3P 3(O 2C 12H 8) 3 phosphazenes, formed as solid powders or films with different molar ratios, have been studied under air and at 800 °C. The characterization of the products has shown that the particle size and morphology are strongly dependent on the nature of the phosphazene, the phosphazene/AuCl(PPh 3) molar ratio and on the preparation methodology. Gold nanoparticles (NPs) with mean sizes as small as 3. 5 nm were obtained from a [NP(O 2C 12H 8)] n/AuCl(PPh 3) 1:1 film. The particle morphology was also strongly dependent on the experimentally conditions of the pyrolysis. Powdered materials exhibit a 3-D irregular morphology in the mixture [NP(O 2C 12H 8)] n/AuCl(PPh 3) 3:1 film, and gold foams in the 1:1 ratio, both from the [NP(O 2C 12H 8)] n/AuCl(PPh 3) as well as N 3P 3(O 2C 12H 8) 3/AuCl(PPh 3) mixtures. These results show for the first time the possibility of controlling morphology and size of gold particles obtained by solid-state reactions.
KW - Gold nanoparticle
KW - Phosphazenes
KW - Solid-state
UR - https://www.scopus.com/pages/publications/84857995884
U2 - 10.1007/s10904-011-9601-8
DO - 10.1007/s10904-011-9601-8
M3 - Article
AN - SCOPUS:84857995884
SN - 1574-1443
VL - 22
SP - 447
EP - 454
JO - Journal of Inorganic and Organometallic Polymers and Materials
JF - Journal of Inorganic and Organometallic Polymers and Materials
IS - 2
ER -