TY - JOUR
T1 - Highly Correlated Size and Composition of Pt/Au Alloy Nanoparticles via Magnetron Sputtering onto Liquid
AU - Deng, Lianlian
AU - Nguyen, Mai Thanh
AU - Shi, Jingming
AU - Chau, Yuen Ting Rachel
AU - Tokunaga, Tomoharu
AU - Kudo, Masaki
AU - Matsumura, Syo
AU - Hashimoto, Naoyuki
AU - Yonezawa, Tetsu
N1 - Funding Information:
This work is partially supported by Hokkaido University. The authors thank Dr. Y. Ishida and Mr. H. Tsukamoto (Hokkaido University) for fruitful discussions. We also thank Mr. Shuang Mei and Mr. Kun Li (Hokkaido University) for their assistance with experiments and Mr. T. Tanioka, Mr. R. Oota, and Ms. R. Ishikawa (Hokkaido University) for their assistance with TEM observations. L.D. thanks the Ministry of Education, Culture, Sports, Science and Technology-Japan (MEXT) for its financial support for her stay in Sapporo.
Funding Information:
The part of this work conducted at Hokkaido University and Kyushu University was supported by the Nanotechnology Platform program of the Ministry of Education, Culture, Sports, Science and Technology-Japan (MEXT). M.T.N. thanks the Ministry of Education, Culture, Sports, Science and Technology Nanotechnology Platform Trial (NPS 17070). Partial financial support was obtained from a Grant-in-Aid for Scientific Research (B) (18H01820 to T.Y.), for Young Researchers (B) from the JSPS (17K14072 to M.T.N.), for Scientific Research on Innovative Areas (research in a proposed research area) (19H05162 to T.Y.), and the Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)) (18KK0159 to T.Y.). T.Y. is also grateful for partial support by the Cooperative Research Program of the “Network Joint Research Center for Materials and Devices” (20181111, 20191100, 20191201, and 20191253), the JSPS A3 Foresight Program “Organic/Inorganic Nanohybrid Platforms for Precision Tumor Imaging and Therapy”, and the Amada Foundation.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/3/31
Y1 - 2020/3/31
N2 - Pt/Au alloy nanoparticles (NPs) in a wide composition range have been synthesized by room-temperature simultaneous sputter deposition from two independent magnetron sources onto liquid PEG (MW = 600). The prepared NPs were alloyed with the face-centered cubic (fcc) structure. In addition, the particle sizes, composition, and shape are strongly correlated but can be tailored by an appropriate variation of the sputtering parameters. No individual particle but large agglomerates with partial alloy structure formed at Pt content of less than 16 atom %. Highly dispersed NPs with no agglomeration were observed in PEG when the quantity of Pt is more than 26 atom %. On the other hand, a small amount of Pt could terminate the agglomeration of Au when sputtering on the grids for transmission electron microscope observation. Our experiment and computer simulation carried out by two different methods indicate that the composition-dependent particle size of Pt/Au can be explained by the atomic concentration, formation energy of the cluster, and interaction between different metal atoms and the PEG molecule.
AB - Pt/Au alloy nanoparticles (NPs) in a wide composition range have been synthesized by room-temperature simultaneous sputter deposition from two independent magnetron sources onto liquid PEG (MW = 600). The prepared NPs were alloyed with the face-centered cubic (fcc) structure. In addition, the particle sizes, composition, and shape are strongly correlated but can be tailored by an appropriate variation of the sputtering parameters. No individual particle but large agglomerates with partial alloy structure formed at Pt content of less than 16 atom %. Highly dispersed NPs with no agglomeration were observed in PEG when the quantity of Pt is more than 26 atom %. On the other hand, a small amount of Pt could terminate the agglomeration of Au when sputtering on the grids for transmission electron microscope observation. Our experiment and computer simulation carried out by two different methods indicate that the composition-dependent particle size of Pt/Au can be explained by the atomic concentration, formation energy of the cluster, and interaction between different metal atoms and the PEG molecule.
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U2 - 10.1021/acs.langmuir.0c00152
DO - 10.1021/acs.langmuir.0c00152
M3 - Article
C2 - 32150418
AN - SCOPUS:85082780280
SN - 0743-7463
VL - 36
SP - 3004
EP - 3015
JO - Langmuir
JF - Langmuir
IS - 12
ER -