The interaction of colloidal gold in aqueous solutions with L-arginine solutions of different concentrations and in various mixing ratios was investigated by UV-Vis spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM). It is evidenced that L-arginine mediates the formation of assemblies of gold nanoparticles, which are shown in TEM and AFM observations to have a complex structure. The TEM results for the evolution of these assemblies are used to evidence the progress in the building process of supermolecular structures. A model is proposed for the mediating action of arginine in the interparticle interactions.
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Florida State Univ, Dept Phys, Tallahassee, FL 32306 USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Liu, Tianhan
Keiper, Timothy
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Florida State Univ, Dept Phys, Tallahassee, FL 32306 USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Keiper, Timothy
Wang, Xiaolei
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Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R ChinaFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Wang, Xiaolei
Yang, Guang
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Florida State Univ, Florida A&M Univ, Coll Engn, Dept Chem & Biomed Engn, Tallahassee, FL 32310 USA
Oak Ridge Natl Lab, Mat Sci & Technol Div, 4500S,Off G158,1 Bethel Valley Rd, Oak Ridge, TN 37830 USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Yang, Guang
Hallinan, Daniel
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Florida State Univ, Florida A&M Univ, Coll Engn, Dept Chem & Biomed Engn, Tallahassee, FL 32310 USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Hallinan, Daniel
Zhao, Jianhua
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Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R ChinaFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA
Zhao, Jianhua
Xiong, Peng
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Florida State Univ, Dept Phys, Tallahassee, FL 32306 USAFlorida State Univ, Dept Phys, Tallahassee, FL 32306 USA