A Changed State of Silver Nanoparticles upon the Adsorption of Acrylic Acid and Low-Temperature Trea |
03.09.2008 г. |
A Changed State of Silver Nanoparticles upon the Adsorption of Acrylic Acid and Low-Temperature Treatment E. A. Kononova, Nghia Nguyen, and I. I. Mikhalenko Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, 117923 Russia E-mail:
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Received June 21, 2007 Abstract — Plasma-resonance absorption spectra of silver hydrosol were recorded and analyzed to estimate the influences of acrylic acid (AA) as an additive and subsequent low-temperature treatment (LTT) of the sol at 77K on the state of silver nanoparticles. It was found that AA adsorbs in two forms with different orientations of its molecules. Low-temperature treatment resulted in aggregation of particles because of their more defective surfaces, which is characterized by the damping factor of plasmon vibrations. In the adsorption of AA, the damping factor also increases, but the cryoaggregation of particles decreases. PACS numbers: 68.43.–h DOI: 10.1134/S0033173208020100
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