Synthesis and Electrochemical Stability of Ultrahigh Aspect Ratio Nanoporous Gold after Calixarene-Phosphine Ligand Removal.
Synthesis and Electrochemical Stability of Ultrahigh Aspect Ratio Nanoporous Gold after Calixarene-Phosphine Ligand Removal.
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DOI：
10.1021/acsami.9b00754
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发表时间：
2019-04
影响因子：
9.5
通讯作者：
Yuhui Xie;Christian Schöttle;Ying Li;C. Carraro;Xinya Zhang;Alexander Katz;R. Maboudian
中科院分区：
文献类型：
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作者：
Yuhui Xie;Christian Schöttle;Ying Li;C. Carraro;Xinya Zhang;Alexander Katz;R. Maboudian
利用我们之前关于合成杯芳烃封端的超高纵横比纳米多孔金的报告，我们现在报告了一类新的纳米多孔金，其中包括使用UV/臭氧处理去除的杯芳烃-膦配体。XPS测量支持通过这种处理去除杯芳烃配体。透射电子显微镜进一步表明，经UV/臭氧处理和随后的强烈还原的电化学环境后，由纳米多孔金壁组成的∼1 nm构建块具有极高的稳定性。用对硝基苯的传感作为表征方法，表明紫外光/臭氧处理后，纳米多孔金的表面化学发生了根本性的变化。
Leveraging our previous report on the synthesis of calixarene-capped ultrahigh aspect-ratio nanoporous gold, we now report a new class of nanoporous gold comprising removed calixarene-phosphine ligands using UV/ozone treatment. The removal of the calixarene ligands by this treatment is supported by XPS measurements. TEM further shows the extraordinary stability of the ∼1 nm building blocks comprising the nanoporous gold wall after UV/ozone treatment and subsequent strongly reducing electrochemical environments. Sensing of nitrobenzene is used as a method of characterization to show that the surface chemistry of the nanoporous gold assemblies has radically changed after the UV/ozone treatment.