Treatment of citrate-capped Au colloids with NaCl, NaBr and Na2SO4:: a TEM, EAS and EPR study of the accompanying changes

被引：10
|
作者：
Wanner, M
Gerthsen, D
Jester, SS
Sarkar, B
Schwederski, B
机构：
[1] Univ Karlsruhe, Lab Elektronenmikroskopie, D-76128 Karlsruhe, Germany
[2] Univ Karlsruhe, Inst Phys Chem, D-76128 Karlsruhe, Germany
[3] Univ Stuttgart, Inst Anorgan Chem, D-70569 Stuttgart, Germany
来源：
COLLOID AND POLYMER SCIENCE | 2005年 / 283卷 / 07期
关键词：
Au colloids; TEM; EAS; EPR; electronic properties;
D O I：
10.1007/s00396-004-1226-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the present study, effects of the treatment of citrate-reduced Au sols with NaCl, NaBr and Na2SO4 are described. The particles are characterized by transmission electron microscopy (TEM) and spectroscopic methods, suggesting an exchange of the citrate capping by the anions of the Na salts. Under electron beam exposure the capping of the NaCl- and NaBr-treated particles disappears. The specific electronic properties of the Na salt-treated particles are studied by electron absorption spectroscopy (EAS) and electron paramagnetic resonance (EPR). A discussion of the results in comparison with the spectroscopic responses from the original particles is given. A correlation between the data of EAS and EPR is found. The respective electron-withdrawing effect of the capping anions towards the Au core seems to be of considerable significance regarding the orbital situation around the Fermi level.
引用
收藏
页码：783 / 792
页数：10
相关论文
共 29 条
  • [21] Study of hot corrosion resistance of electroless nickel coating with different content of phosphorous in molten salt deposit Na2SO4–NaCl at 650°C
    Ghaderi M.
    Rezagholizadeh M.
    Nasiri-Vatan H.
    Ebrahimi-Kahrizsangi R.
    Surface Engineering and Applied Electrochemistry, 2015, 51 (04) : 367 - 373
  • [22] Study of the Solubility, Supersolubility, and Metastable Zone Width of Ternary System (NaCl + Na2SO4 + H2O) Containing Organic Impurity at 333.15 K
    Ge, Shao-Ying
    Ma, Yu-Long
    Zhu, Li
    Zheng, Xiao-Xia
    Ren, Yong-Sheng
    Ma, Rui
    Gao, Jing
    JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2019, 64 (12): : 5113 - 5121
  • [23] Study of the stable and metastable phase equilibrium of a ternary system (NaCl + Na2SO4 + H2O) in coal-to-liquids wastewater at 323.15 K
    Zhu, Li
    Ma, Yu-Long
    Ge, Shao-Ying
    Wu, Di
    Che, Cheng
    Liu, Er
    Zhao, Kang-He
    DESALINATION AND WATER TREATMENT, 2020, 197 : 121 - 130
  • [24] Changes in photosynthetic parameters and nutrient distribution of olive plants (Olea europaea L.) Cultivar 'chondrotia chalkidikis' under NaCl, Na2SO4, and KCl salinities
    Vigo, C
    Therios, IN
    Patakas, A
    Karatassou, M
    Nastou, A
    AGROCHIMICA, 2002, 46 (1-2): : 33 - 46
  • [25] Scanning electrochemical microscopy (SECM) study of pH changes at Pt electrode surfaces in Na2SO4 solution (pH 4) under potential cycling conditions
    Yang, YF
    Denuault, G
    JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (20): : 3791 - 3798
  • [26] TEPLOPROVODNOST VODNYKH RASTVOROV ELEKTROLITOV .1. EKSPERIMENTALNOE ISSLEDOVANIE VODNYKH RASTVOROV KF, LICL, NACL, KCL, RBCL, CSCL, NABR, KBR, NAJ, KJ, NA2SO4, BESO4, MGCL2, CACL2, ALCL3
    KAPUSTINSKII, AF
    RUZAVIN, II
    ZHURNAL FIZICHESKOI KHIMII, 1955, 29 (12): : 2222 - 2229
  • [27] A Comparative Study of High Temperature Corrosion of Al2O3, SiO2 and Al2O3–SiO2 Forming Alloys in a Na2SO4–NaCl Atmosphere
    Toto Sudiro
    Tomonori Sano
    Shoji Kyo
    Osamu Ishibashi
    Masaharu Nakamori
    Kazuya Kurokawa
    Oxidation of Metals, 2013, 80 : 589 - 597
  • [28] Study on the durability of eco-friendly recycled aggregate concrete with supplementary cementitious materials: The combined action of compound salt solution of MgSO4, Na2SO4, and NaCl and dry-wet cycles
    Wang, Jiabin
    Fan, Yijie
    Che, Zhihao
    Zhang, Kaifeng
    Niu, Ditao
    CONSTRUCTION AND BUILDING MATERIALS, 2023, 377
  • [29] Surface Modification of the Improved Stainless Steel Alloy AISI-304 and the Use of Diffusion Coating and a Study of Its Efficiency in Resistivity Hot Corrosion in an Atmosphere of Sodium Chloride Vapor NaCL and Sodium Sulfate Na2SO4
    Khudair, Taha Mahmoud
    Hamood, Mahmood Ahmed
    BAGHDAD SCIENCE JOURNAL, 2024, 21 (01) : 187 - 195
123