Facile one-pot synthesis of 3D graphite-SiO2 composite foam for negative resistance devices

Ye Wu, Hao Fu, Amitava Roy, Pengfei Song, Yingcheng Lin*, Orhan Kizilkaya, Jian Xu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


In this study, we successfully prepare a porous graphite-SiO2 composite foam via a facile glucose-foaming-based method. The foam was characterized by XRD, XPS, SEM, Raman, and soft X-ray absorption spectroscopy of the carbon and oxygen K-edges and by silicon K-edge X-ray absorption near edge structure (XANES) spectroscopy. The electrical properties of the sample were evaluated using current-voltage measurements. The synthesized graphite-SiO2 composite foam showed negative resistance effect, i.e. an increase in the applied voltage led to a decrease in current. This negative resistance effect can be explained by two possible mechanisms: (1) the existence of defect states and (2) a change in the charge shifting amount.

Original languageEnglish
Pages (from-to)41812-41818
Number of pages7
JournalRSC Advances
Issue number66
Publication statusPublished - 2017
Externally publishedYes

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