Investigation of Redox-Transmetallation Process for Coating of Gold(Au)-shell on Nickel (Ni)-core Nanoparticles

被引：0

作者：

Roselina, N. R. Nik ^{[1
]}

Azizan, A. ^{[2
]}

Hyie, Koay Mei ^{[1
]}

Mardziah, C. M. ^{[1
]}

Salleh, Z. ^{[1
]}

机构：

[1] Univ Teknol MARA, Fac Mech Engn, Shah Alam 40450, Selangor, Malaysia

[2] Univ Sains Malaysia, Sch Mat & Mineral Resources Engn, Nibong Tebal 14300, Pulau Pinang, Malaysia

来源：

MACHINE DESIGN AND MANUFACTURING ENGINEERING III | 2014年

关键词：

core-shell; nanoparticles; redox; transmetallation; REVERSE MICROEMULSION; BIMETALLIC CLUSTERS; GOLD NANOPARTICLES; NI; AU;

D O I：

10.4028/www.scientific.net/AMM.607.55

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Core-shell nanoparticle has created great interest among researchers due to their various unique properties. The new properties created are combination of both the core and the shell. In this work, pre-prepared Nickel (Ni) nanoparticles were coated with Gold (Au) to produce core-shell structure. Formation mechanism of the core-shell structure is investigated via UV-Vis spectrum of the as-synthesized particles and its supernatants. Ni nanoparticles were synthesized using polyol method with hydrazine as the reducing agent. Coating of Au was conducted using sodium citrate as the reducing agent and acid citric to control the pH of the mixture. UV-Vis absorption spectra analysis of as-synthesized nanoparticles and the supernatant results revealed that the coating happened via redox-transmetallation process with a very broad peak at about 540 nm and size range of 26 - 40 nm. XPS results suggest that the coating consists of Au compound.

引用

页码：55 / 60

页数：6

共 17 条

[1] Laser ablation synthesis of gold nanoparticles in organic solvents
Amendola, V
Polizzi, S
Meneghetti, M
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (14) : 7232 - 7237
[2] Preparation and characterization of 3 nm magnetic NiAu nanoparticles
Auten, Bethany J.
Hahn, Benjamin P.
Vijayaraghavan, Ganesh
Stevenson, Keith J.
Chandler, Bert D.
[J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (14) : 5365 - 5372
[3] Phase transfer of oleic acid capped NicoreAgshell nanoparticles assisted by the flexibility of oleic acid on the surface of silver
Bala, T
Swami, A
Prasad, BLV
Sastry, M
[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2005, 283 (02) : 422 - 431
[4] Preparation of functionalized and gold-coated cobalt nanocrystals for biomedical applications
Bao, YP
Krishnan, KM
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 293 (01) : 15 - 19
[5] Synthesis of gold nanoparticles stabilised by metal-chelator and the controlled formation of close-packed aggregates by them
Santanu Bhattacharya
Aasheesh Srivastava
[J]. Journal of Chemical Sciences, 2003, 115 (5-6) : 613 - 619
[6] Properties of core-shell Ni-Au nanoparticles synthesized through a redox-transmetalation method in reverse microemulsion
Chen, Dong
Li, Jiajun
Shi, Chunsheng
Du, Xiwen
Zhao, Naiqin
Sheng, Jing
Liu, Shuo
[J]. CHEMISTRY OF MATERIALS, 2007, 19 (14) : 3399 - 3405
[7] Nanometre Ni and core/shell Ni/Au nanoparticles with controllable dimensions synthesized in reverse microemulsion
Chen, Dong
Liu, Shuo
Li, Jiajun
Zhao, Naiqin
Shi, Chunsheng
Du, Xiwen
Sheng, Jing
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 475 (1-2) : 494 - 500
[8] Synthesis and characterization of cobalt/gold bimetallic nanoparticles
Cheng, Guangjun
Walker, Angela R. Hight
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 311 (01) : 31 - 35
[9] Understanding the oxidative stability of gold monolayer-protected clusters in the presence of halide ions under ambient conditions
Dasog, Mita
Scott, Robert W. J.
[J]. LANGMUIR, 2007, 23 (06) : 3381 - 3387
[10] Synthesis and electromagnetic wave absorption property of Ni-Ag alloy nanoparticles
Lee, Chung-Che
Cheng, Ya-Yi
Chang, Hsiang Yu
Chen, Dong-Hwang
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 480 (02) : 674 - 680

← 1 2 →