A new form of nanosized SrTiO3 material for near-human-body temperature oxygen sensing applications

Y. Hu; O. K. Tan; J. S. Pan; X. Yao

doi:10.1021/jp048973z

A new form of nanosized SrTiO₃ material for near-human-body temperature oxygen sensing applications

Y. Hu, O. K. Tan^*, J. S. Pan, X. Yao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

87 Citations (Scopus)

Abstract

A new form of nanosized SrTiO₃ semiconducting oxide material with an average crystal grain size of 27 nm has been synthesized using the physical high-energy ball milling technique. The unique presence of the singly charged "O^-" ions in the lattice oxygen sites of the nano-range crystal grain material has been observed in the XPS study. This unprecedented and interesting discovery has expounded on the new oxygen sensing mechanism for the near 1/2 slope gradient (the best value ever reported) in the logarithmic relationship of the electrical conductance with the oxygen partial pressure. The derived SrTiO₃ oxygen gas sensors were found to operate at 40 °C (the lowest temperature ever reported for an SrTiO ₃-based sensor) that is near to the human body temperature.

Original language	English
Pages (from-to)	11214-11218
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	108
Issue number	30
DOIs	https://doi.org/10.1021/jp048973z
Publication status	Published - Jul 29 2004
Externally published	Yes

ASJC Scopus Subject Areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "A new form of nanosized SrTiO3 material for near-human-body temperature oxygen sensing applications",

abstract = "A new form of nanosized SrTiO3 semiconducting oxide material with an average crystal grain size of 27 nm has been synthesized using the physical high-energy ball milling technique. The unique presence of the singly charged {"}O-{"} ions in the lattice oxygen sites of the nano-range crystal grain material has been observed in the XPS study. This unprecedented and interesting discovery has expounded on the new oxygen sensing mechanism for the near 1/2 slope gradient (the best value ever reported) in the logarithmic relationship of the electrical conductance with the oxygen partial pressure. The derived SrTiO3 oxygen gas sensors were found to operate at 40 °C (the lowest temperature ever reported for an SrTiO 3-based sensor) that is near to the human body temperature.",

author = "Y. Hu and Tan, {O. K.} and Pan, {J. S.} and X. Yao",

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AU - Hu, Y.

AU - Tan, O. K.

AU - Pan, J. S.

AU - Yao, X.

PY - 2004/7/29

Y1 - 2004/7/29

N2 - A new form of nanosized SrTiO3 semiconducting oxide material with an average crystal grain size of 27 nm has been synthesized using the physical high-energy ball milling technique. The unique presence of the singly charged "O-" ions in the lattice oxygen sites of the nano-range crystal grain material has been observed in the XPS study. This unprecedented and interesting discovery has expounded on the new oxygen sensing mechanism for the near 1/2 slope gradient (the best value ever reported) in the logarithmic relationship of the electrical conductance with the oxygen partial pressure. The derived SrTiO3 oxygen gas sensors were found to operate at 40 °C (the lowest temperature ever reported for an SrTiO 3-based sensor) that is near to the human body temperature.

AB - A new form of nanosized SrTiO3 semiconducting oxide material with an average crystal grain size of 27 nm has been synthesized using the physical high-energy ball milling technique. The unique presence of the singly charged "O-" ions in the lattice oxygen sites of the nano-range crystal grain material has been observed in the XPS study. This unprecedented and interesting discovery has expounded on the new oxygen sensing mechanism for the near 1/2 slope gradient (the best value ever reported) in the logarithmic relationship of the electrical conductance with the oxygen partial pressure. The derived SrTiO3 oxygen gas sensors were found to operate at 40 °C (the lowest temperature ever reported for an SrTiO 3-based sensor) that is near to the human body temperature.

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A new form of nanosized SrTiO₃ material for near-human-body temperature oxygen sensing applications

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