Abstract

We report a terahertz time-domain spectroscopy study of the adsorption of water in hydrophilic silica aerogel. The adsorbed water is in submonolayer form and shows properties of index of refraction similar to those of bulk water but different absorption properties.

© 2004 Optical Society of America

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References

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  1. S. S. Kistler, J. Phys. Chem. 36, 52 (1932). An overview of the properties of aerogels is available at http://eande.lbl.gov/ecs/aerogels/ .
  2. G. J. Young, J. Colloid Sci. 13, 67 (1958).
    [CrossRef]
  3. A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
    [CrossRef]
  4. M. A. Henderson, Surf. Sci. Rep. 46, 1 (2002).
  5. D. Grischkowsky, S. Keiding, M. van Exter, and Ch. Fattinger, J. Opt. Soc. Am. B 7, 2006 (1990).
    [CrossRef]
  6. L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).
  7. J. T. Kindt and C. A. Schmuttenmaer, J. Phys. Chem. 100, 10373 (1996).
  8. J. Dai and D. Grischkowsky, unpublished measurement of bulk water in our laboratory.
  9. P. B. Wagh and S. V. Ingale, Ceramics Int. 28, 43 (2002).
    [CrossRef]

2002 (2)

M. A. Henderson, Surf. Sci. Rep. 46, 1 (2002).

P. B. Wagh and S. V. Ingale, Ceramics Int. 28, 43 (2002).
[CrossRef]

1996 (1)

J. T. Kindt and C. A. Schmuttenmaer, J. Phys. Chem. 100, 10373 (1996).

1995 (1)

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

1992 (1)

A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
[CrossRef]

1990 (1)

1958 (1)

G. J. Young, J. Colloid Sci. 13, 67 (1958).
[CrossRef]

1932 (1)

S. S. Kistler, J. Phys. Chem. 36, 52 (1932). An overview of the properties of aerogels is available at http://eande.lbl.gov/ecs/aerogels/ .

Aegerter, M. A.

A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
[CrossRef]

da Silva, A.

A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
[CrossRef]

Dai, J.

J. Dai and D. Grischkowsky, unpublished measurement of bulk water in our laboratory.

Donoso, P.

A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
[CrossRef]

Fattinger, Ch.

Grischkowsky, D.

D. Grischkowsky, S. Keiding, M. van Exter, and Ch. Fattinger, J. Opt. Soc. Am. B 7, 2006 (1990).
[CrossRef]

J. Dai and D. Grischkowsky, unpublished measurement of bulk water in our laboratory.

Henderson, M. A.

M. A. Henderson, Surf. Sci. Rep. 46, 1 (2002).

Ingale, S. V.

P. B. Wagh and S. V. Ingale, Ceramics Int. 28, 43 (2002).
[CrossRef]

Jacobsen, R. H.

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

Keiding, S.

Keiding, S. R.

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

Kindt, J. T.

J. T. Kindt and C. A. Schmuttenmaer, J. Phys. Chem. 100, 10373 (1996).

Kistler, S. S.

S. S. Kistler, J. Phys. Chem. 36, 52 (1932). An overview of the properties of aerogels is available at http://eande.lbl.gov/ecs/aerogels/ .

Schmuttenmaer, C. A.

J. T. Kindt and C. A. Schmuttenmaer, J. Phys. Chem. 100, 10373 (1996).

Thrane, L.

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

Uhd Jepsen, P.

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

van Exter, M.

Wagh, P. B.

P. B. Wagh and S. V. Ingale, Ceramics Int. 28, 43 (2002).
[CrossRef]

Young, G. J.

G. J. Young, J. Colloid Sci. 13, 67 (1958).
[CrossRef]

Ceramics Int. (1)

P. B. Wagh and S. V. Ingale, Ceramics Int. 28, 43 (2002).
[CrossRef]

Chem. Phys. Lett. (1)

L. Thrane, R. H. Jacobsen, P. Uhd Jepsen, and S. R. Keiding, Chem. Phys. Lett. 240, 330 (1995).

J. Colloid Sci. (1)

G. J. Young, J. Colloid Sci. 13, 67 (1958).
[CrossRef]

J. Non-Cryst. Solids (1)

A. da Silva, P. Donoso, and M. A. Aegerter, J. Non-Cryst. Solids 145, 168 (1992).
[CrossRef]

J. Opt. Soc. Am. B (1)

J. Phys. Chem. (2)

S. S. Kistler, J. Phys. Chem. 36, 52 (1932). An overview of the properties of aerogels is available at http://eande.lbl.gov/ecs/aerogels/ .

J. T. Kindt and C. A. Schmuttenmaer, J. Phys. Chem. 100, 10373 (1996).

Surf. Sci. Rep. (1)

M. A. Henderson, Surf. Sci. Rep. 46, 1 (2002).

Other (1)

J. Dai and D. Grischkowsky, unpublished measurement of bulk water in our laboratory.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup.

Fig. 2
Fig. 2

(a) Output pulses of reference (top trace) and signal scans and (b) their respective spectra. The reference and signal scans have been shifted in time and separated vertically for clarity. Inset, enlargement of the pulses in the vicinity of the peaks to show the relative signal pulse delay.

Fig. 3
Fig. 3

(a) Amplitudes and (b) phases of Aa+aw+vω/Aaω compared with Hawω based on Eq. (2). The amplitude of Hawω has been raised by 0.2 for clarity.

Fig. 4
Fig. 4

(a) Index of refraction and (b) power absorption coefficient αawω due to the adsorbed water inside the silica aerogel. The dashed curves are those of the bulk water.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

Aa+aw+vω=A0ωHa+awωHvω.
Hawω=Ha+awωHaω=Aa+aw+vwAaωA0ωAvω.
Hawωexpi2πdλ0nawω-1exp-αawωd/2,

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