TY - JOUR
T1 - Chemical and thermal stability of pt nanocubes synthesized with various surface-capping agents
AU - Kim, Cheonghee
AU - Min, Minkyu
AU - Chang, Young Wook
AU - Yoo, Kyung Hwa
AU - Lee, Hyunjoo
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2010/1
Y1 - 2010/1
N2 - Pt nanocubes with a size of below 10 nm were synthesized by using various surface-capping agents of polyvinylpyrrolidone (PVP), tetradecyltrimethylammonium bromide (TTAB), and oleylamine with high shape purity. TGA and XPS data revealed the amount and characteristics of the residual organic molecules on the surface of Pt nanocubes. Chemical and thermal stability of these nanoparticles were examined by observing the change of cubic shape upon heating under different chemical environments of N 2, H 2 and air. The shape change such as rounding of the vertexes or aggregation depended on the type of surface-capping agent and chemical environments. The cubic shape generally started to deform at 200 °C and the nanoparticles were mostly fused together at 300 °C. The thermal treatment under air produced more PtO layer on the surface with less shape deformation or aggregation when compared with H 2 or N 2 treatments. Among three surface-capping agents used in this study, oleylamine-capped Pt nanocubes show the highest shape stability with no shape change or aggregation even at 300 °C under air.
AB - Pt nanocubes with a size of below 10 nm were synthesized by using various surface-capping agents of polyvinylpyrrolidone (PVP), tetradecyltrimethylammonium bromide (TTAB), and oleylamine with high shape purity. TGA and XPS data revealed the amount and characteristics of the residual organic molecules on the surface of Pt nanocubes. Chemical and thermal stability of these nanoparticles were examined by observing the change of cubic shape upon heating under different chemical environments of N 2, H 2 and air. The shape change such as rounding of the vertexes or aggregation depended on the type of surface-capping agent and chemical environments. The cubic shape generally started to deform at 200 °C and the nanoparticles were mostly fused together at 300 °C. The thermal treatment under air produced more PtO layer on the surface with less shape deformation or aggregation when compared with H 2 or N 2 treatments. Among three surface-capping agents used in this study, oleylamine-capped Pt nanocubes show the highest shape stability with no shape change or aggregation even at 300 °C under air.
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U2 - 10.1166/jnn.2010.1514
DO - 10.1166/jnn.2010.1514
M3 - Article
C2 - 20352839
AN - SCOPUS:77955077021
VL - 10
SP - 233
EP - 239
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
SN - 1533-4880
IS - 1
ER -