Core-Shell Gold Nanorod@Zirconium-Based Metal-Organic Framework Composites as in Situ Size-Selective Raman Probes

Johannes W.M. Osterrieth, Demelza Wright, Hyunho Noh, Chung Wei Kung, Diana Vulpe, Aurelia Li, Ji Eun Park, Richard P. Van Duyne, Peyman Z. Moghadam, Jeremy J. Baumberg, Omar K. Farha, David Fairen-Jimenez

研究成果: Article同行評審

71 引文 斯高帕斯(Scopus)

摘要

Nanoparticle encapsulation inside zirconium-based metal-organic frameworks (NP@MOF) is hard to control, and the resulting materials often have nonuniform morphologies with NPs on the external surface of MOFs and NP aggregates inside the MOFs. In this work, we report the controlled encapsulation of gold nanorods (AuNRs) by a scu-topology Zr-MOF, via a room-temperature MOF assembly. This is achieved by functionalizing the AuNRs with poly(ethylene glycol) surface ligands, allowing them to retain colloidal stability in the precursor solution and to seed the MOF growth. Using this approach, we achieve core-shell yields exceeding 99%, tuning the MOF particle size via the solution concentration of AuNRs. The functionality of AuNR@MOFs is demonstrated by using the AuNRs as embedded probes for selective surface-enhanced Raman spectroscopy (SERS). The AuNR@MOFs are able to both take-up or block molecules from the pores, thereby facilitating highly selective sensing at the AuNR ends. This proof-of-principle study serves to present both the outstanding level of control in the synthesis and the high potential for AuNR@Zr-MOF composites for SERS.

原文English
頁(從 - 到)3893-3900
頁數8
期刊Journal of the American Chemical Society
141
發行號9
DOIs
出版狀態Published - 2019 3月 6

All Science Journal Classification (ASJC) codes

  • 催化
  • 化學 (全部)
  • 生物化學
  • 膠體和表面化學

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