Synthesis and bioconjugation of 2 and 3 nm-diameter gold nanoparticles.

Synthesis and bioconjugation of 2 and 3 nm-diameter gold nanoparticles.
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DOI:
10.1021/bc900135d
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发表时间:
2010-02-17
影响因子:
4.7
通讯作者:
Kornberg, Roger D.
Kornberg, Roger D.
中科院分区:
化学2区
文献类型:
--
作者:
Ackerson, Christopher J.;Jadzinsky, Pablo D.;Sexton, Jonathan Z.;Bushnell, David A.;Kornberg, Roger D.

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通过调节合成溶剂条件,得到了直径为2和3 nm的单分散对巯基苯甲酸(p-MBA)单层保护的金纳米粒子。可以从反应混合物中生长出2nm颗粒的大单晶。均匀性也证明了形成的二维阵列和定量高角度环形暗场扫描透射电子显微镜。2和3 nm的颗粒自发反应与蛋白质和DNA的结合,并进一步反应,可以防止再钝化谷胱甘肽。通过一对颗粒与TAP标签中的蛋白A结构域对的结合,与抗体Fc片段的缀合物可用于在电子显微照片中鉴定TAP标记的感兴趣的蛋白。
By adjustment of solvent conditions for synthesis, virtually monodisperse 4-mercaptobenzoic acid (p-MBA) monolayer-protected gold nanoparticles, 2 and 3 nm in diameter were obtained. Large single crystals of the 2 nm particles could be grown from the reaction mixture. Uniformity was also demonstrated by the formation of two-dimensional arrays and by quantitative high-angle annular dark-field scanning transmission electron microscopy. The 2 and 3 nm particles were spontaneously reactive for conjugation with proteins and DNA, and further reaction could be prevented by repassivation with glutathione. Conjugates with antibody Fc fragment could be used to identify TAP-tagged proteins of interest in electron micrographs, through the binding of a pair of particles to the pair of protein A domains in the TAP tag.
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