Exfoliated Metal Oxide Nanosheets as Effective and Applicable Substrates for Atomically Dispersed Metal Nanoparticles with Tailorable Functionalities

Jiyoon Seo, Xiaoyan Jin, Minho Kim, In Young Kim, Yun Kyung Jo, Sandipan Bera, Nam Suk Lee, Wan In Lee, Hyungjun Kim, Seong Ju Hwang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


An effective methodology to stabilize highly dispersed metal nanoparticles is developed by employing the exfoliated 2D metal oxide nanosheets with variable surface structures as substrates. The selection of appropriate crystal structure of titanate nanosheet is very crucial in stabilizing atomically dispersed Pt nanoparticles through the tuning of chemical interaction between Pt and titanate substrate. A theoretical study using density functional theory calculations confirms the significant influence of the crystal structure of layered titanate nanosheet on the crystal growth behavior of immobilized metal nanoparticle. As a consequence of the good dispersion of Pt nanoparticles, the Pt–trititanate nanohybrids with stronger interaction show much higher content of atomically dispersed Pt and better catalyst performances than do the Pt–lepidocrocite titanate ones. The applicability of the present method for other metal species is evidenced by the successful tuning of the crystal size and functionality of Au nanoparticles via immobilization on layered titanate nanosheets. The functionality of Au for surface-enhanced Raman spectroscopy becomes improved by the anchoring on the lepidocrocite-type titanate nanosheet. The present study underscores that the use of the metal oxide 2D nanosheets with appropriate surface structure as substrates is effective in tailoring the crystal growth and the functionalities of immobilized metal nanoparticles.

Original languageEnglish
Article number1600661
JournalAdvanced Materials Interfaces
Issue number20
StatePublished - 19 Oct 2016

Bibliographical note

Funding Information:
J.S. and X.J. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2014R1A2A1A10052809) and by the Global Frontier R&D Program (2013-073298) on Center for Hybrid Interface Materials (HIM). The experiments at PAL were supported in part by MOST and POSTECH.

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • atomically dispersed metal nanoparticles
  • controlled crystal growth
  • functionality
  • inorganic nanosheet
  • surface structure


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