Alkyne-functionalized superstable graphitic silver nanoparticles for Raman imaging.
Alkyne-functionalized superstable graphitic silver nanoparticles for Raman imaging.
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用于拉曼成像的炔官能化超稳定石墨银纳米颗粒
DOI：
10.1021/ja507368z
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发表时间：
2014-10-01
影响因子：
15
通讯作者：
Tan, Weihong
中科院分区：
文献类型：
--
作者：
Song, Zhi-Ling;Chen, Zhuo;Bian, Xia;Zhou, Li-Yi;Ding, Ding;Liang, Hao;Zou, Yu-Xiu;Wang, Shan-Shan;Chen, Long;Yang, Chao;Zhang, Xiao-Bing;Tan, Weihong
贵金属，尤其是金，已广泛用于等离子共振应用。尽管银比金具有更大的光学截面和更低的成本，但由于其容易腐蚀，从而降低等离子体信号并限制其应用，因此受到的关注要少得多。为了解决这个问题，我们报告了超稳定 AgCu@石墨烯（ACG）纳米颗粒（NP）的简便合成。即使在存在过氧化氢、硫化氢和硝酸的情况下，在银铜合金纳米颗粒表面生长多层石墨烯也能有效保护银表面免受污染。 ACG 纳米颗粒已用于增强石墨壳的独特拉曼信号，使 ACG 成为细胞标记、快速拉曼成像和 SERS 检测的理想候选者。 ACG 进一步用炔-聚乙二醇进行功能化，其在细胞的拉曼沉默区域具有强烈的拉曼振动，从而导致细胞内更准确的共定位。总之，这项工作提供了一种简单的方法来制造耐腐蚀、水溶性和石墨烯保护的AgCu NPs，该纳米粒子具有强表面等离子体共振效应，适用于传感和成像。
Noble metals, especially gold, have been widely used in plasmon resonance applications. Although silver has a larger optical cross section and lower cost than gold, it has attracted much less attention because of its easy corrosion, thereby degrading plasmonic signals and limiting its applications. To circumvent this problem, we report the facile synthesis of superstable AgCu@graphene (ACG) nanoparticles (NPs). The growth of several layers of graphene onto the surface of AgCu alloy NPs effectively protects the Ag surface from contamination, even in the presence of hydrogen peroxide, hydrogen sulfide, and nitric acid. The ACG NPs have been utilized to enhance the unique Raman signals from the graphitic shell, making ACG an ideal candidate for cell labeling, rapid Raman imaging, and SERS detection. ACG is further functionalized with alkyne-polyethylene glycol, which has strong Raman vibrations in the Raman-silent region of the cell, leading to more accurate colocalization inside cells. In sum, this work provides a simple approach to fabricate corrosion-resistant, water-soluble, and graphene-protected AgCu NPs having a strong surface plasmon resonance effect suitable for sensing and imaging.
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影响因子：
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作者：
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DOI：
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影响因子：
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