Transformation of amorphous TiO₂ to a hydronium oxofluorotitanate and applications as an HF sensor

Journal Article · Thu Dec 24 00:00:00 EST 2015 · Sensors and Actuators. B, Chemical

DOI:https://doi.org/10.1016/j.snb.2015.12.068· OSTI ID:1257988

Appelhans, Leah N. ^[1]; Finnegan, Patrick S. ^[1]; Massey, Lee T. ^[1]; Luk, Ting S. ^[2]; Rodriguez, Mark A. ^[1]; Brumbach, Michael T. ^[1]; McKenzie, Bonnie ^[1]; Craven, Julia M. ^[1]

---

1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT-SNL)

We examined amorphous titania thin films for use as the active material in a polarimetry based HF sensor. The amorphous titania films were found to be sensitive to vapor phase HF and the reaction product was identified as a hydronium oxofluorotitanate phase, which has previously only been synthesized in aqueous solution. The extent of reaction varied both with vapor phase HF concentration, relative humidity, and the exposure time. HF concentrations as low as 1 ppm could be detected for exposure times of 120 h.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• Grant/Contract Number: AC04-94AL85000
• OSTI ID: 1257988
• Alternate ID(s): OSTI ID: 1252543
• Report Number(s): SAND-2015-6515J; PII: S0925400515307930
• Journal Information: Sensors and Actuators. B, Chemical, Vol. 228, Issue C; ISSN 0925-4005
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Hydrofluoric acid
Titania
Oxyfluoride
HF sensor
Polarimetry