A facile synthetic method to decorate amine-functionalized silica spheres (SiO2) by silver nanoparticles (Ag NPs) is reported. The transmission electron microscopic (TEM) images showed that spherical Ag NPs with an average particle size of 14 nm were deposited on 250 nm-sized SiO2 spheres (SiO2/Ag NPs). The spectral and colorimetric detection of Hg(II) ions were carried out using the synthesized SiO2/Ag NPs with an experimental detection limit of 5 mu M. It was found that the addition of Hg(II) ions (150 mu M) into the solution of SiO2/Ag NPs completely quenched the SPR band of the Ag NPs due to the formation of anisotropic Ag amalgam crystals (AgHg). The selective detection of Hg(II) ions by SiO2/Ag NPs in the presence of other environmentally relevant metal ions was also demonstrated using spectral and colorimetric methods.
机构:
Korea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Korea Inst Sci & Technol, Green City Technol Inst, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Univ Sci & Technol, 217 Gajeong Ro, Daejeon 305350, South KoreaKorea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Lee, Sujin
Nam, Yun-Sik
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Korea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Korea Inst Sci & Technol, Green City Technol Inst, Hwarang Ro 14 Gil 5, Seoul 136791, South KoreaKorea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Nam, Yun-Sik
Lee, Ho-Jin
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Korea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Korea Inst Sci & Technol, Green City Technol Inst, Hwarang Ro 14 Gil 5, Seoul 136791, South KoreaKorea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Lee, Ho-Jin
Lee, Yeonhee
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Korea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Korea Inst Sci & Technol, Green City Technol Inst, Hwarang Ro 14 Gil 5, Seoul 136791, South KoreaKorea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Lee, Yeonhee
Lee, Kang-Bong
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Korea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Korea Inst Sci & Technol, Green City Technol Inst, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
Univ Sci & Technol, 217 Gajeong Ro, Daejeon 305350, South KoreaKorea Inst Sci & Technol, Adv Anal Ctr, Hwarang Ro 14 Gil 5, Seoul 136791, South Korea
机构:
Chulalongkorn Univ, Fac Sci, Dept Chem, Electchem & Opt Spect Res Unit, Bangkok 10330, ThailandChulalongkorn Univ, Fac Sci, Dept Chem, Electchem & Opt Spect Res Unit, Bangkok 10330, Thailand
Apilux, Amara
Siangproh, Weena
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Srinakharinwirot Univ, Fac Sci, Dept Chem, Bangkok 10110, ThailandChulalongkorn Univ, Fac Sci, Dept Chem, Electchem & Opt Spect Res Unit, Bangkok 10330, Thailand
Siangproh, Weena
Praphairaksit, Narong
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Chulalongkorn Univ, Fac Sci, Dept Chem, Electchem & Opt Spect Res Unit, Bangkok 10330, Thailand
Chulalongkorn Univ, Ctr Petr Petrochem & Adv Mat, Bangkok 10330, ThailandChulalongkorn Univ, Fac Sci, Dept Chem, Electchem & Opt Spect Res Unit, Bangkok 10330, Thailand