Synthesis of gold nanoparticles by reduction of HAuCl4 under UV irradiation |
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| Institution: | 1. Department of Physiology, Iuliu Hatieganu University of Medicine and Pharmacy, Clinicilor 1-3, Cluj-Napoca, Romania;2. Research Center for Advanced Chemical Analysis, Instrumentation and Chemometrics (ANALYTICA), Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos Street, 400028, Cluj-Napoca, Romania;3. University of Agricultural Sciences and Veterinary Medicine, Faculty of Food Science and Technology, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania;4. Department of Infectious Diseases, \"Iuliu Hatieganu\" University of Medicine and Pharmacy, 400348 Cluj-Napoca, Romania;5. Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania;6. University of Agricultural Sciences and Veterinary Medicine, Department of Biochemistry, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania;1. School of Energy Science & Engineering, Harbin Institute of Technology, Harbin 150001, China;2. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;3. Environmental Monitoring Center of Heilongjiang Province, Harbin 150001, China |
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| Abstract: | Gold nanoparticles were prepared in surfactant solutions by reduction of HAuCl4 under UV irradiation without adding extra reductants or other organic substances. The effect of the structure and the property of surfactant on the size and the optical properties of prepared gold nanoparticles were studied. It was found that the longer the alkyl chain of the surfactant, the larger gold particles are obtained. On the other hand, lengthen the geminis spacer benefits the formation of smaller gold particles. The formation of adduct micelles composed of the charged surface active portion of the surfactant molecule and the (AuIIICl4)− ion in cationic surfactant solution serves as the gold source and favors the formation of gold particles with larger sizes. While the repulsion between the (AuIIICl4)− ion and the negative charged surface of anionic surfactant micelle is in favor of the formation of gold nanoparticles with smaller sizes. The nonionic surfactants can also assist the formation of dispersed gold nanoparticles. |
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