Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances

N. Doy*, G. McHale, M. I. Newton, C. Hardacre, R. Ge, R. W. Allen, J. M. MacInnes

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

The drive towards cleaner industrial processes has led to the development of room temperature ionic liquids (RTIL) as environmentally friendly solvents. They comprise solely of ions which are liquid at room temperature and with over one million simple RTIL alone it is important to characterize their physical properties using minimal sample volumes. Here we present a dual Quartz Crystal Microbalance (QCM) which allows separate determination of viscosity and density using a total sample volume of only 240 mu L. Liquid traps were fabricated on the sensing area of one QCM using SU-8 10 polymer with a second QCM having a flat surface. Changes in the resonant frequencies were used to extract separate values for viscosity and density. Measurements of a range of pure RTIL with minimal water content have been made on five different trap designs. The best agreement with measurements from the larger volume techniques was obtained for trap widths of around 50 pm thus opening up the possibility of integration into lab-on-a-chip systems.

Original languageEnglish
Title of host publication2009 IEEE SENSORS, VOLS 1-3
Place of PublicationNEW YORK
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages287-290
Number of pages4
ISBN (Print)978-1-4244-4548-6
Publication statusPublished - 2009
Event8th IEEE Conference on Sensors - Christchurch, New Zealand
Duration: 25 Oct 200928 Oct 2009

Conference

Conference8th IEEE Conference on Sensors
CountryNew Zealand
CityChristchurch
Period25/10/200928/10/2009

Keywords

  • RESONATORS

Cite this

Doy, N., McHale, G., Newton, M. I., Hardacre, C., Ge, R., Allen, R. W., & MacInnes, J. M. (2009). Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances. In 2009 IEEE SENSORS, VOLS 1-3 (pp. 287-290). NEW YORK: Institute of Electrical and Electronics Engineers (IEEE).
Doy, N. ; McHale, G. ; Newton, M. I. ; Hardacre, C. ; Ge, R. ; Allen, R. W. ; MacInnes, J. M. / Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances. 2009 IEEE SENSORS, VOLS 1-3. NEW YORK : Institute of Electrical and Electronics Engineers (IEEE), 2009. pp. 287-290
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abstract = "The drive towards cleaner industrial processes has led to the development of room temperature ionic liquids (RTIL) as environmentally friendly solvents. They comprise solely of ions which are liquid at room temperature and with over one million simple RTIL alone it is important to characterize their physical properties using minimal sample volumes. Here we present a dual Quartz Crystal Microbalance (QCM) which allows separate determination of viscosity and density using a total sample volume of only 240 mu L. Liquid traps were fabricated on the sensing area of one QCM using SU-8 10 polymer with a second QCM having a flat surface. Changes in the resonant frequencies were used to extract separate values for viscosity and density. Measurements of a range of pure RTIL with minimal water content have been made on five different trap designs. The best agreement with measurements from the larger volume techniques was obtained for trap widths of around 50 pm thus opening up the possibility of integration into lab-on-a-chip systems.",
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Doy, N, McHale, G, Newton, MI, Hardacre, C, Ge, R, Allen, RW & MacInnes, JM 2009, Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances. in 2009 IEEE SENSORS, VOLS 1-3. Institute of Electrical and Electronics Engineers (IEEE), NEW YORK, pp. 287-290, 8th IEEE Conference on Sensors, Christchurch, New Zealand, 25/10/2009.

Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances. / Doy, N.; McHale, G.; Newton, M. I.; Hardacre, C.; Ge, R.; Allen, R. W.; MacInnes, J. M.

2009 IEEE SENSORS, VOLS 1-3. NEW YORK : Institute of Electrical and Electronics Engineers (IEEE), 2009. p. 287-290.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances

AU - Doy, N.

AU - McHale, G.

AU - Newton, M. I.

AU - Hardacre, C.

AU - Ge, R.

AU - Allen, R. W.

AU - MacInnes, J. M.

PY - 2009

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N2 - The drive towards cleaner industrial processes has led to the development of room temperature ionic liquids (RTIL) as environmentally friendly solvents. They comprise solely of ions which are liquid at room temperature and with over one million simple RTIL alone it is important to characterize their physical properties using minimal sample volumes. Here we present a dual Quartz Crystal Microbalance (QCM) which allows separate determination of viscosity and density using a total sample volume of only 240 mu L. Liquid traps were fabricated on the sensing area of one QCM using SU-8 10 polymer with a second QCM having a flat surface. Changes in the resonant frequencies were used to extract separate values for viscosity and density. Measurements of a range of pure RTIL with minimal water content have been made on five different trap designs. The best agreement with measurements from the larger volume techniques was obtained for trap widths of around 50 pm thus opening up the possibility of integration into lab-on-a-chip systems.

AB - The drive towards cleaner industrial processes has led to the development of room temperature ionic liquids (RTIL) as environmentally friendly solvents. They comprise solely of ions which are liquid at room temperature and with over one million simple RTIL alone it is important to characterize their physical properties using minimal sample volumes. Here we present a dual Quartz Crystal Microbalance (QCM) which allows separate determination of viscosity and density using a total sample volume of only 240 mu L. Liquid traps were fabricated on the sensing area of one QCM using SU-8 10 polymer with a second QCM having a flat surface. Changes in the resonant frequencies were used to extract separate values for viscosity and density. Measurements of a range of pure RTIL with minimal water content have been made on five different trap designs. The best agreement with measurements from the larger volume techniques was obtained for trap widths of around 50 pm thus opening up the possibility of integration into lab-on-a-chip systems.

KW - RESONATORS

M3 - Conference contribution

SN - 978-1-4244-4548-6

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EP - 290

BT - 2009 IEEE SENSORS, VOLS 1-3

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Doy N, McHale G, Newton MI, Hardacre C, Ge R, Allen RW et al. Separate Density and Viscosity Determination of Room Temperature Ionic Liquids using Dual Quartz Crystal Microbalances. In 2009 IEEE SENSORS, VOLS 1-3. NEW YORK: Institute of Electrical and Electronics Engineers (IEEE). 2009. p. 287-290